Кафедра Транспортний сервіс та логістика (КТСЛ ДІІТ)

Permanent URI for this communityhttp://crust.ust.edu.ua/handle/123456789/76

UKR: Кафедра Транспортний сервіс та логістика ( до 2023 року мала назву Кафедра Управління експлуатаційною роботою на залізничному транспорті)
ENG: The Department of Transport Service and Logistics (until 2023 it was called the Department of Management of Operational Work in Railway Transport)

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Adaptation of Ukrainian Grain Elevators for Unit Train Loading
(Kaunas University of Technology, Kaunas, Lithuania, 2018) Kozachenko, Dmytro M.; Bobrovsky, Volodymyr I.; Ochkasov, Oleksandr B.; Shepotenko, Anatolii P.; Hermaniuk, Yuliia M.
ENG: The aim of the paper is to improve approaches to the design and operation of private sidings of grain elevators for loading of unit trains. The research is based on the methods of organizing of railway operation. One of the main methods of reducing costs in the logistics chain, which provides for the export of grain cargoes is the using of unit train technology for transportation. Introduction of this technology in Ukraine is limited by the low loading capacity of elevators. In the paper the basic schemes of track development of elevator private sidings and analyzes the use of different technical means for performing shunting operations are presented. The results of the performed research can be used for designing and reconstruction of the existing elevators and for building the new ones, as well as for estimating the costs associated with different logistic schemes for grain delivery to seaports. As result the work develops a methodology and obtains a technical-operational assessment of the technical equipment and the operation technology grain elevator private sidings for loading of unit trains.
Analysis of Design of Passenger Cars Bogies for High speed Movement
(The Silesian University of Technology, Poland, 2014) Kharchenko, Aleksandr V.
EN: This paper gives an overview of the existing models of passenger cars bogies for high-speed movement, both Ukrainian production and production of other countries. As a result of this analysis it were determined the main tendencies to improve the design of running parts of passenger cars for high-speed movement. Also it was made a classification of bogies of passenger cars on different criteria.
Analysis of Possibilities for Integrating the Transport System of Ukraine into the European Transport Network
(Видавничий дім «Гельветика», 2023) Nesterenko, Halyna I.; Muzykin, Mykhailo I.; Strelko, Oleh H.; Bibik, Svitlana I.; Aleksieieva, A. O.
ENG: This article is devoted to the analysis of transport networks of such European countries as Ukraine, Hungary, and Romania. The article provides an analysis of the peculiarities in the movement organization in these countries. The transport systems of these countries were researched since during the war the issue of the interaction of the automobile transport networks exactly in these countries became particularly relevant. After all, there are incredibly long queues at the checkpoints in Poland because of strikes by Polish customs officers. And, therefore, the routes through Romania and Hungary are the most realistic both during the export of goods from Ukraine and to import humanitarian goods. The joint use of Europe's integrated systems is a necessary component in the organization of the effective operation of road transport, as it ensures increased efficiency in the use of the motor vehicle fleet and personnel; reduction of costs for maintenance, fuel, lubricants due to optimization of routes and reduction of non-productive vehicle mileage; reduction of the need to expand the motor vehicle fleet; clearer prospective planning of work based on objective information about the real mileage of each vehicle unit and reduction of losses related to repairs and expansion of the range of services and prompt response to requests. It is advisable to conduct further research in the direction of adapting the use of augmented reality technology in the driver's navigation systems.
Assessing the Efficiency of Centralized Use of Train Formations within an Extensive Supply Network for Metallurgical Production
(TECHNOLOGY CENTER PC, Kharkiv, 2025) Zaruba, Oleksandr V.; Okorokov, Andrii M.; Vernyhora, Roman V.; Prokopa, Oleh I.; Khomenko, Yurii L.
ENG: This study investigates a transportation-technological system that enables raw material supply by rail to meet the needs of a metallurgical enterprise. The task addressed is to assess the effectiveness of centralized use of train shipments in an extensive supply network for the needs of metallurgical production. The hypothesis of the study assumes that under conditions of centralized management of the rolling stock fleet of railroad transport within an extensive supply network, its number will be smaller than in the case of a non-centralized one. A mathematical and simulation model has been built in the AnyLogic University Researcher environment using agent and discrete-event approaches. The main criterion is the minimization of the average delivery time; additional criteria are the optimal use of the working fleet of railroad cars and train locomotives. Applying them in combination makes it possible to optimize the working fleet of railroad cars and locomotives, taking into account the extensiveness of the supply network and the conditions of centralized management. It was experimentally established that with centralized fleet management, fluctuations and volumes of metallurgical raw material residues at the enterprise depend on the loading rate of railroad cars of the sending or group of railroad cars of the stepped routes. According to the calculated values of the determination coefficients, the approximation by the exponential function turned out to be denser. The variability of raw material residues decreases with a change in the technical loading rate of the train or railroad car batch. It was established that the difference between the standard deviation for the train loading rate of 4000 t (σ(х) = 4524.7 t) and the standard deviation of 2606.5 t (σ(х) = 4524.7 t) is 1918.2 t. This corresponds to 42% of the initial value of the indicator. The proposed approach allows for a more accurate assessment of the need for a working fleet of railroad cars and locomotives, as well as improves the efficiency of transportation management.
Assessment of Cargo Delivery Quality Using Fuzzy Set Apparatus
(SPC Научно-издательская корпорация, ОАЕ, 2018) Kyrychenko, Hanna; Statyvka, Yurii; Strelko, Oleh; Berdnychenko, Yulia; Nesterenko, Halyna I.
ENG: Abstract. The influence of the existing operation conditions for the time of cargo transportation, i.e. ferrous metals to the port station, was investi-gated. It was proposed to carry out the management of cargo delivery on the basis of determining the values of cargo handling duration while implementing the stages of the schedule. It was proposed to carry out assessment of the delivery process, including transportation using the fuzzy set apparatus. To determine the quality of transportation, an ordered categorized scale of values of the duration of cargo's staying in certain conditions at delivery stages was proposed. The assessment of deviations at all the stages of transportation with the use of linguistic definitions of conditions allows quantifying such an indicator as the transportation quality. The characteristics of deviations during transportation are provided in the linguistic form to the dispatching unit for making a decision. The revealed regularities in devia-tions from the standard schedules of trains during delivery of cargos are an objective basis for taking into account them in the mathemati-cal models of the forecast of time of cargo delivery at each of the defined stages of transportation. The data on the forecasted and actual transportations are accumulated in the existing information base, forming data files for assessing the quality of the transportation process, the adequacy of the mathematical model and correcting of the model in case of significant organizational or technical changes.
Assessment of Processing Capacity of Railway Stations Based on Statistical Analysis Methods
(Institut za istraživanja i projektovanja u privredi, Beograd, 2025) Taran, Ihor; Tilemisova, Aigul; Kozachenko, Dmytro M.; Verlan, Anatoliy I.; Grevtsov, Serhii
ENG: The purpose of the study is to improve the methods of assessing the processing capacity of railway stations based on scientific observation data. The paper considers a large private station that provides transport services to port terminals when performing railway and water transportation. The research is performed based on methods of analysis of time series and theory of operation of railways. The study established the maximum permissible volume of work for the port station and also assessed the impact of the combination of diverse types of goods on the amount of its processing capacity. The scientific novelty of the work is to improve the methods of evaluating the processing capacity of railway stations based on the methods of statistical data analysis. Unlike the existing method, the method allows you to more accurately consider local features of stations. The practical value of the results obtained is that they allow to predict the work of the station in the conditions of accidental flow of port terminals requests for servicing and avoid overload. This enables the station management to develop more efficient strategies for managing its work.
Assessment of the Efficiency of Methods for Transporting Perishable Foods in the Conditions of Kazakhstan
(The Silesian University of Technology, Gliwice, Poland, 2024) Taran, Igor; Alik, Assel; Korobiova, Ruslana H.; Grevtsov, Serhii; Izteleuova, Maral
ENG: The purpose of the paper is to assess the competitiveness of road and rail transport for the transportation of perishable foods in the Republic of Kazakhstan. The study analyzed food consumption and production, as well as the transport network of the Republic of Kazakhstan. An assessment was made of the costs of transporting perishable foods by road, as well as by rail in railway cars and container trains. The modes of transportation were established, and it was found that the transportation of fresh food products in container trains is competitive with road transportation. The scientific novelty of the work is that it improves the method for assessing the competitiveness of road and rail transport for the transportation of fresh food products. The proposed method differs from existing ones in that it takes into account the loss of consumer value of food products over time while also considering the presence of competition by sources when choosing a type of transport. The practical value of the work is that it establishes the types of food products and directions of their transportation, the performance of which is advisable to carry out by container trains in the Republic of Kazakhstan.
Assessment of the Urban Freight Regulations Impact on the Transportation Cost
(4S go, s.r.o., Slovak Republic, EU, 2022) Galkin, Andrii; Nazarov, Oleksii A.; Shapoval, Ganna; Kolosok, Valeriia; Khodova, Yana; Kuznetsov, Anatolii
ENG: The paper will investigate the impact of the vehicle carrying capacity to which the local tax is applied on forming the cost of delivery. The cost of 1 ton of freight under different tax scenarios is estimated in the paper: without tax 0, with fixed tax – 10% and with progressive tax from 0 to 75%. The greatest effect on reducing the vehicle's load capacity during urban deliveries showed a progressive tax. The developed regression model allows determining the cost of transportation of 1 ton of goods depending on the technological parameters of transport operations, the costs of the transport (logistics) operators to perform these operations, and local tax regulations for transport. The application of the model makes it possible to regulate the use of vehicles of a given capacity by the local administration. In contrast to the strict prohibition on the establishment of traffic signs, the use of a progressive tax by the local administration makes it possible to regulate traffic structure by economic methods. Exploring of influence local tax regulations on transportation will lead to the sustainability of the cities in order to provide GREEN technologies.
Asymmetric Power Supply Circuit Design for Electric Rolling Stock on the Electrified DC Rail
(IEEE, 2020) Sychenko, Viktor G.; Danylov, Oleksiy; Bekh, Petro V.; Kosariev, Yevhen; Liashuk, Vitalij; Drubetskaya, Tanya
ENG: Modern requirements for the traction power supply system of direct current in providing the high-speed movement are reduced to the need of ensuring a normalized voltage level of 2900 V on current collectors of electric locomotives. At the same time, the power supply system has to be stable on changes in power consumption and have the necessary specific energy intensity. The purpose of the work is to explain the transition to a new circuit design of the traction network using additional generators of electric energy. The proposed asymmetrical power supply system of the electric rolling stock allows to provide the required voltage level on the electric locomotive current collectors, to reduce the range of its changes and to reduce the power losses by 14.3% compared to the symmetrical centralized power supply circuit design with passive boosting of the traction network.
Building Models to Optimize Vehicle Downtime in Multimodal Transportation
(PC TECHNOLOGY CENTER, 2023) Razghonov, Serhii; Lesnikova, Iryna; Kuznetsov, Vitalii M.; Kuzmenko, Albina; Khalipova, Nataliіa; Chernikov, Danylo; Zvonarova, Olha V.; Prokhorchenko, Halyna; Horulia, Mykola; Bekh, Petro V.
ENG: Sustainable development has become the main focus of transport policy and planning around the world. One of the practical goals when performing multimodal transportation is the optimization of logistics costs. That is, the object of research is the process of multimodal transportation. Empirical research shows that the problem of optimization of transportation costs can be solved by different methods. But the result will be similar. In the given approach, only one component of the transportation process is subject to optimization, which is the overload time. The solutions are based on the method of mass service theory and the method based on fuzzy logic. With the help of these methods, based on practical data, time parameters were calculated that characterize overloading from railway transport to road transport. The application of the method of a weakly formalized process in relation to transport logistics was considered, taking into account not only quantitative estimates but also qualitative, vaguely defined criteria that do not lend themselves to formalization, and the relationships between them. The model was developed for further research of this process, prediction of its behavior, optimization of functioning. It is based on the technology of fuzzy sets. The results obtained using the agent model based on the mass service network and the model based on fuzzy logic differ within the permissible specified limits of no more than 5–7 %. The application of fuzzy logic in the logistics of multimodal transportation is relevant and gives the best results compared to traditional methods of the theory of mass service systems. The article includes comparisons that reflect the advantages of the proposed approach. The obtained results are of a practical nature and can be used to make a decision on choosing a route and/or when transferring from one mode of transport to another.
Capital Investments in the Context of Sustainable Development of Railways
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Kharchenko, Olesia I.; Okorokov, Andrii; Vernigora, Roman V.; Tsuprov, Pavlo; Papakhov, Oleksandr Yu.; Logvinova, Nataliia A.
ENG: Abstract. Ukraine, due to its geographical position and developed transport infrastructure, has significant potential as a transit country, primarily in the supply chain of trade between Asia and Europe. According to the estimates of the British Institute for Transport Rendell Ukraine, the transit coefficient of Ukraine is 3,75 (with a maximum of 5); This is the best indicator among the countries of Europe (for comparison, in Poland, which occupies the second place, this indicator is 2,92). Nowadays, Ukraine uses its transit potential extremely insufficiently and inefficiently; over the past 10 years, the volume of transit traffic through the territory of Ukraine has declined by more than 2,5 times, primarily due to the fall in transit traffic by rail. One of the reasons for this situation is, of course, the general political and economic situation in the country. However, there are a number of other negative factors that prevent Ukraine from fully and effectively using its transit potential. These problems lie both in the purely technical plane (deterioration of transport infrastructure and rolling stock, lack of capacity of the main transport routes, underdevelopment of logistics terminals in the country and at land borders, difference in width with the European railway system) and the legislato-thick (high level of port dues, bureaucratization and regulation of customs procedures, lack of flexible tariff policy for carriers, etc.).
The Concept of a Hybrid Traction Power Supply System
(Les Ulis: EDP Sciences-Web of Conferences, France, 2019) Sychenko, Viktor G.; Kuznetsov, Valeriy; Kosariev, Yevhen; Bekh, Petro V.; Sayenko, Yuriy; Styslo, Bohdan O.; Pavlichenko, Mihail; Vasilev, Ihor; Pulin, Mykola M.
ENG: Abstract. The growing shortage of energy resources to provide heavy traffic and high-speed traffic necessitates the development of a new power supply scheme for a traction network using sources of distributed generation of electric energy. Application of asymmetric distributed traction power system with the use of distributed generation allows to increase electric energy efficiency of the feed system of rolling stock, reduce its material capacity and increase the reliability of the functioning of the railway system as a whole. The proposed structure of the hybrid electric traction system involves the creation of a new paradigm aimed at ensuring high demands on the voltage and specific power in the traction network, which will allow to improve the quality and safety of the transportation process when increasing the energy performance indicators. This paradigm will allow to form a new philosophy of building traction power systems. The key elements of this philosophy are decentralization of generation and consumption of electric energy, the use of intelligent electric equipment, distributed power supply management in a single information space of the energy process during transportation. The peculiarity of the proposed work is the optimal combination of technological processes of transmission, consumption of electric energy and transportation, taking into account the specific conditions of functioning of the electrified section: points of connection of power sources and their type, profile of the track, schedule of trains, types of rolling stock and equipment. Conceptually, the hybrid traction power system is an electric hub, in which the inputs are generating points, and the output is the power supply system of the rolling stock. The internal structure of the electric power objects of the hub is determined by the type of transformation and accumulation of electric energy and ways of managing these objects in real time.
Controlling the Speed of Rolling Cuts in Conditions of Reduction of Brake Power of Car Retarders
(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2016) Kozachenko, Dmytro M.; Bobrovskyi, Volodymyr I.; Grevtsov, Serhii V.; Berezovyi, Mykola I.
ENG: Purpose. The study aims to develop the requirements for organization of the marshalling process in the conditions when the power of retarder positions is less than the nominal one. Methodology. The research is carried out using the train traffic safety theory and mathematical modelling of hump processes. Findings. The current technical standard documents regulating the operational performance of humps do not contain direct instructions on how to proceed in the event of brake power loss by car retarders, thus creating threats to the traffic safety. This problem is quite acute for the Ukrainian railways in connection with a chronic shortage of funds for the repair and renewal of technical equipment, including the humps. At the same time, a significant drop in the volume of work leads to the fact that the hump required processing capacity can be provided in case of partial failure of retarders as well. Herewith the most important task is to ensure the breaking-up safety in conditions of parametric failures of retarders. The analysis of dangerous situations, the occurrence of which is possible at humps, as well as the modelling of cut rolling, allowed establishing the connection between the value of retarder tire pressing force on the car wheels and the breaking-up modes, providing the safety of marshalling process. The paper sets the application areas of such measures as the breaking-up speed reduction, breaking-up termination, the use of additional braking by block hangers. Originality. The originality of the work lies in the fact that it first obtained the complex of dependencies that determine the performance requirements for the power of hump retarders and allow the staff to enter the appropriate limits for breaking-up modes to ensure the marshalling process safety. Practical value. The results of the research can be used to supplement the «Instruction on the maintenance of facilities of mechanized and automated humps» in order to determine the limits of breaking-up modes when detecting the reduction of retarder power below the nominal one.
Creation of Export-Oriented Network of Grain Elevators in Ukraine
(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпро, 2017) Kozachenko, Dmytro M.; Vernigora, Roman V.; Rustamov, Rustam S.
ENG: Purpose. The scientific paper highlights improving the efficiency of export rail transportation of grain cargoes in Ukraine by introducing shipper routing and concentration of loading at the terminal grain elevators. Methodology. According to the experience of the USA and Canada, one of the most effective ways to reduce costs in the grain to-port supply chain is a shipper routing of the rail traffic. Shipper routing for transportation of grain cargoes involves the concentration of their loading on the multiple junctions. The junctions are proposed to be selected with the use of cluster analysis methods. For the formation of the grain loading concentration areas the authors used methods of set theory and multi-criteria optimization. Findings. Based on agglomerative cluster analysis algorithm, the junctions on a network of Ukrainian railways are selected and the areas of possible concentration of grain loading are formed. DSU-algorithm allowed distinguishing the overlapping and non-overlapping areas of concentration. The problem of selecting non-overlapping areas of the grain loading concentration is formalized as the problem of multiobjective integer programming with boolean variables. The solution of this problem by a modified simplex algorithm allows selecting on the railway network of Ukraine 24 districts of possible grain loading concentration, which cover 70 stations and at minimal additional cost provide routing of about 7.5 million tons of grain per year. Originality. The originality of the work lies in the fact that the authors developed the mathematical procedure for selection of junctions and concentration areas of grain loading at the Ukrainian railway network, taking into account the economic efficiency of the process. Practical value. Application of the developed method of grain loading concentration for the formation of unit trains will significantly reduce the logistics costs in the supply chain of grain to Ukrainian ports for export and, consequently, increase its competitiveness in foreign markets.
Determination of the Optimal Cars Exit Speeds from the Retarders on Sorting Humps
(KTU, Lithuania, 2023) Kozachenko, Dmytro M.; Grevtsov, Serhii V.; Titova, Anastasiia
ENG: Sorting humps are the main technical means providing the breaking- and making-up of freight trains on marshalling yards. Automation of sorting process by implementing microprocessor control systems is the main direction of increasing hump yard capacity, enhancement of safety in trains breaking-up, improvement of working conditions on hump yards. The purpose of theresearch is determination of the optimal cars exit speeds from the retarders on sorting humps. Its solution is significantly complicated because of the uncertainty of cars rolling resistance coefficient, wind velocity and direction, retarder control errors. The research is performed using the methods of the simulation modelling, mathematical statistics and direct optimization methods. The originality of the work is related to the solution of the problem of choosing cars exit speeds from the retarders in a stochastic formulation. The practical value of the work lies in the fact that the proposed method allows improving the quality of sorting process as a whole by improving the software of microprocessor control systems for automatic humping, rather than by increasing their technical facilities, which as a result will reduce the cost of their construction and operation.
Determining Loading Patterns in the Bearing Structure of a Railroad Flatcar with a Floor Made from Sandwich Panels
(PC TECHNOLOGY CENTER, 2023) Lovska, Alyona O.; Nerubatskyi, Volodymyr; Okorokov, Andrii M.; Vernyhora, Roman V.; Zhuravel, Iryna L.
ENG: The object of research is the processes of emergence, perception, and redistribution of loads in the supporting structure of a flatcar with a floor made of sandwich panels. To reduce the impact of dynamic loads on the supporting structure of a flatcar, as well as the safety of goods transported in it, it is proposed to manufacture floors from sandwich panels. Within the framework of the study, mathematical modeling of the dynamic load on a flatcar when it runs in a loaded state was carried out. It was found that, taking into account the proposed solution, the accelerations acting on the supporting structure of a flatcar are reduced by 8.4 % compared to the typical one. At the same time, accelerations acting on cargo placed on a flatbed car are reduced by 11.7 %. The results of calculating the strength of sandwich panels, when arranged on a flatcar, proved the feasibility of the proposed improvement. The main indicators of dynamics of the improved flatcar structure operated in an empty state were determined. It was established that the flatcar movement is assessed as "good". A feature of the results reported here is that the improved supporting structure of a flatcar contributes not only to reducing its dynamic load but also to improving the safety of transported cargoes. The scope of practical application of the results is the engineering industry, in particular, railroad transport. The condition for the practical application of the research results is the use of energy-absorbing material in the structure of sandwich panels. The study could contribute to devising recommendations regarding the design of modern structures of railroad vehicles and increasing the efficiency of the functioning of the transportation industry.
Determining Patterns of Vertical Load on the Prototype of a Removable Module for Long-Size Cargoes
(РС Тесhnology Сеntеr, Kharkiv, Ukraine, 2022) Vatulia, Glib; Lovska, Alyona O.; Pavliuchenkov, Mykhailo; Nerubatskyi, Volodymyr; Okorokov, Andrii; Hordiienko, Denys; Vernigora, Roman V.; Zhuravel, Irina L.
ENG: The object of this study is the processes of occurrence, exposure to, and redistribution of loads in the supporting structure of a removable module for the transportation of long cargoes. To adapt platform cars to the transportation of long loads, it is proposed to introduce a removable module with elastic-friction connections in the structure. In order to select the optimal profiles for the removable module, in terms of minimal material consumption, the calculation was carried out in the Lira software package. Based on the calculation results, a spatial model of the concept of the removable module was built. To determine the dynamic loads that act on the platform car loaded with a removable module, a mathematical simulation was carried out. It was established that the use of elastic-friction links in the structure of the removable module helps reduce its dynamic load, as well as the platform car, by 4.6%. The resulting acceleration was taken into account when calculating the strength of the removable module. The calculation results showed that the strength of the removable module under operational loads is ensured. A feature of the reported results is that the proposed design of a removable module makes it possible not only to adapt the plat-form car to the transportation of long loads but also to reduce its load in operation. The scope of practical application of the results includes the engineering industry, in particular, railroad transport. Worth noting is that the conditions for the practical use of the results imply the introduction of elastic-friction links in the structure of the removable module. The reported research will contribute to compiling recommendations for the design of modern vehicle structures, in particular removable type, as well as for improving the efficiency of rail transportation.
Determining the Load on the Bearing Structure of a Flat Wagon for Long Cargo in Rail-Ferry Transportation
(TECHNOLOGY CENTER PC, Kharkiv, 2025) Lovska, Alyona O.; Okorokov, Andrii M.; Muradian, Arsen O.; Romakh, Valentyna L.; Bolvanovska, Tetiana V.
ENG: This study's object is the processes of perception and redistribution of loads in the supporting structure of a flat wagon for long-length cargo during rail-ferry transportation. The task addressed is to adapt a universal flat wagon for transporting long-length cargo. In this case, it is proposed to improve the structure of a flat wagon by equipping it with frame-type side walls reinforced with sandwich panels. The proposed technical advancement was substantiated by mathematical modeling of the dynamic loading of the flat wagon during transportation by rail ferry. The calculation results established that the proposed improvement contributes to a reduction in the dynamic loading of a flat wagon's supporting structure by 15% compared to the typical structure. The findings were confirmed by computer simulation. The results of calculating the strength of a flat wagon's supporting structure established that its strength is ensured. A special feature of the technical advancement is that it does not require intervening in the basic concept of a flat wagon's supporting structure since the side walls are removable. The scope of practical application of the research results is railroad transport. The practical use of the findings is subject to the absence of a natural degree of freedom of the side wall frame. The results of this study will contribute to improving the efficiency of railroad transport operation, including international traffic. The results could also prove useful for designing modern car structures with improved technical and operational characteristics.
Determining the Rational Motion Intensity of Train Traffic Flows on the Railway Corridors with Account for Balance of Expenses on Traction Resources and Cargo Owners
(Sciendo, 2019) Butko, Tetiana V.; Muzykin, Mykhailo I.; Prokhorchenko, Andrii V.; Nesterenko, Halyna I.; Prokhorchenko, Halyna
ENG: The article proposes a method for determining the rational motion intensity of specific train traffic flows on railway transport corridors with account for balance of expenses on traction resources and cargo owners. A mathematical model based on stochastic optimization is developed, which allows to optimize, in the conditions of risks, the interval between trailing trains on the railway lines taking into account the limited resources of the traction rolling stock, the capacity of the stations and freight fronts at the cargo destination point. Solving this mathematical model allows to find a balance between the expenses for movement of train traffic flows from different railway lines to their terminal reference station and the expenses of a consignee, subject to the limitations of the technological logistics chain in cargo transportation. For the solution of this mathematical model, a Real-coded Genetic Algorithm (RGA) was used.
Determining the Vertical Load on a Container with a Floor Made of Sandwich Panels Transported by a Flat Wagon
(TECHNOLOGY CENTER PC, Kharkiv, 2024) Lovska, Alyona O.; Stanovska, Iraida; Kyryllova, Valeriia; Okorokov, Andrii M.; Vernihora, Roman V.
ENG: The object of this study is the processes of perception and redistribution of vertical loads in the structure of a container with a floor made of sandwich panels under operational modes. To ensure the strength of the container, as well as the safety of the cargo transported in it, it is proposed to design a floor based on sandwich panels. It is assumed that each of these panels is made of two metal sheets in a layer between which an energy-absorbing material is placed. Given the presence of energy-absorbing material in the structure of the sandwich panel, the vertical dynamic loads acting on the cargo container during its transportation will be reduced. To substantiate the proposed solution, mathematical modeling of the vertical load on the container during its transportation by a flat wagon was carried out. It is found that the accelerations acting on the container of the improved design are 5.7 % lower than those acting on the container of standard design. The calculation of the strength of the container was carried out under operational schemes of its loads. It has been established that the strength of the container is ensured. A special feature of the results is that the reduction of the load on the container is achieved not by strengthening its structure but by introducing flexible connections into it. The field of practical application of the results is railroad transport. The conditions for the practical use of the findings are the use of energy-absorbing material in the structure of sandwich panels that form the floor of the container. The results of the research will contribute to improving the strength of containers under operating conditions, the safety of the cargo transported in them, as well as increasing the efficiency of the functioning of container transportation.
Development of a Simulation Model of Grain Delivery in Global Supply Chains
(National University of Life and Environmental Scienсes of Ukraine, Kyiv, 2024) Khomenko, Yurii; Matsiuk, Viacheslav; Okorokov, Andrii M.; Gorobchenko, Oleksandr
ENG: The main export shipments of grain to Ukraine are carried out through commercial seaports of the Black Sea, while the complex and multiphase transportation process creates delays and leads to additional costs at the points of connection of various types of transport. The purpose of the study was the process of transporting grain cargo for export through commercial seaports. Ukraine is a developed agricultural country that produces a significant share of the world’s grain volume, most of which is exported. The optimisation simulation model of multimodal grain cargo transportation developed in the study, in contrast to the existing ones, is a multiphase process with many initial parameters, subsystems, and technological elements that adequately reflect all components of the technological process of organising transportation by road, rail, and sea, and helps to optimise these processes. The model consists of several transport and technological subsystems, each of which corresponds to the process of grain transportation by road, rail, or water. The minimum total duration of cargo transportation from the place of origin to the moment of sending grain cargo for export by sea was chosen as the optimal criterion. To establish the minimum required number of replications and the minimum required model time, a series of experiments were performed, where the key and systematic modelling measurement parameter is the total time of grain delivery by land, from the point of origin to the sea trade terminal. As a result of modelling, the optimal number of rolling stock of different types of transport and the transportation time for each phase of the process were determined. Logistics operators of the agro-industrial sector can apply the model to improve grain delivery routes and schemes, evaluate and improve technological parameters, and minimise transportation time and costs.
Development of Analytical Methods for Calculating Time Standards for Shunting Operations
(Дніпровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпро, 2021) Kozachenko, Dmytro M.; Verlan, Anatoliy I.; Korobiova, Ruslana G.
ENG: Purpose. The article is aimed to conduct a historical analysis of the development of analytical methods for stand-ardizing the duration of shunting operations, as well as assessing their compliance with the existing operating conditions of railway transport. Methodology. The research in this article was carried out on the basis of an analysis of literary sources and methods of the theory of the organization of the operational work of railways. Findings. The standardization of the duration of shunting operations is one of the most important tasks of the theory of operational work of railways. The existing method of standardizing the duration of shunting operations developed in the first half of the 20th century and is used to this day. The performed analysis shows that the scientific principles underlying it generally correspond to the modern conditions of the railway transport. Additional research in this area can be associated with assessing the influence of the initial location of cars on the tracks on the average duration of shunting operations, taking into account the influence of length restrictions of the cars groups being moved, as well as monitoring the implementation of established norms by statistical methods. The article also shows that the values of modern time standards for shunting operations, in many cases, are set for technical means and technologies that were used in railway transport in the 50–70s of the 20th century and do not correspond to the operating conditions of real stations and sidings of industrial enterprises. Therefore, they require revision. Originality. In this paper, based on historical analysis, the process of development of methods for setting the time for shunting operations is described and the factors influencing the current value of norms are established. Practical value. The research results make it possible to identify the reasons for the discrepancy between the existing time standards for performing shunting operations and the real operating conditions of stations and sidings of industrial enterprises, as well as to establish the main elements of the methodology for standardizing the duration of shunting operations that require revision.
Especially the Functioning of Railway Stations in the Conditions of the Organization of Transport Dangerous Goods
(Дніпропетровський національний університет залізничного транспорту ім. академіка В. Лазаряна, Дніпропетровськ, 2016) Kozachenko, Dmytro M.; Zhuravel, Irenа L.; Zhuravel, Vyacheslav V.
ENG: Purpose. Ensuring a sufficient level of transport safety is an important task in the context of development of railway transport as a part of international transport corridors and under increasing freight traffic volumes. The intensification of the transport process when there is the significant depreciation of fixed assets actualizes the development and implementation of methods to of improving the safety of railway transportation of dangerous goods, as well as technological and organizational measures, which are directed decrease of risks of emergency situations with its goods. Methodology. The methods of system analysis and theory of the railways operating management were used. Findings. The regulatory framework of the dangerous goods transportation by rail was characterized. The main indicators of the dangerous goods transportation under modern conditions of railway transport functioning were investigated. A detailed structure of the factors, which influence on the stations operating conditions during the transportation of dangerous goods was developed, and the measures of the stations technology improving in order to increase the traffic safety were proposed. Originality. Authors had detailed features of the functioning of the railway stations functioning under the dangerous goods transportation management. Practical value. Taking into account the factors and implementation of the proposed measures will improve the safety level of dangerous goods processing at railway stations.
Estimation of Private Locomotives Usage Efficiency for Freight Transportation in Ukraine
(Dnipro National University of Railway Transport named after Academician V. Lazaryan; Les Ulis: EDP Sciences-Web of conferences, 2019) Kozachenko, Dmytro M.; Gera, Bogdan V.; Sannytskyy, Nazar М.; Hermaniuk, Yuliia M.; Shargun, Tetyana
ENG: Abstract. Ukraine has undertaken the implementation of European Union Directives, which provide nondiscriminatory admission to the railway infrastructure of independent carriers. A significant number of factors considerably affect working conditions of the carriers which are independent of Ukrzaliznytsia. One of the goals while performing transportation by independent carriers is the organization of private locomotives operation and their service by engine crews. The purpose of the article is to assess technical and economic indices of private locomotives use for goods transportation. The schemes of infrastructure objects arrangement for locomotives operation and engine crews work are presented. Performed calculations show the potential possibility of independent railway carriers to fulfil transportation to seaports with the use of its private locomotive infrastructure exclusively. The estimation of economically expedient volumes of cargo transportation by private locomotives in comparison with existing pricing of Ukrzaliznytsia is carried out. The nonlinear dependence of transportation volume depending on the distance is determined, at which the total cost of cargo transportation by Ukrzaliznytsia locomotives is equal to the cost of cargo transportation by private locomotives. The results of the study allow concerned companies to evaluate the investment efficiency into the development of locomotive fleet for rail transportation.
Evaluation of Effectiveness of Piggyback Traffic within the National Network of International Transport Corridors of Ukraine
(Publishing House of University of Technology, Katowice, 2022) Muzykin, Mykhailo I.; Nesterenko, Halyna I.; Kuzmenko, Albina
ENG: The increasing role of education and science in modern society has caused changes in its understanding. Modern education becomes a condition for the country's development, a guarantor of its security, determines the level of the economy. Thus, education and science for sustainable development must function as a direct generator of new socio-economic life and produce social, environmental, and economic changes towards sustainable development. In addition, one of the main tools for sustainable development should be the close interaction of education with science. Therefore, the problem of supporting the development of education and science is deeply social and is one of the priorities of social development, which is directly related to the system of national interests, improving the quality of life and national security. The monographic research presents the scientific works of the team of authors that reveal different directions and aspects of science and education in providing sustainable development. These are: 1) Financial and Economic Principles of Sustainable Development; 2) Innovative and Information Technologies in Education: Applied Aspects; 3) Socio-Humanitarian Aspects of Sustainable Development; 4) Technical Solutions to Ensure Sustainable Development. The third section of the monograph "Socio-Humanitarian Aspects of Sustainable Development" looks at the environmental, linguistic, psychological, cultural, and art-therapeutic aspects of the development of society. The team of authors hopes that the monograph contains useful research results that are relevant for scientists, students and anyone interested in various aspects of education and science, given their significance in various areas of public life.
Evaluation of the Transition to the Organization of Freight Trains Traffic by the Schedule
(Silesian University of Technology, Poland, 2016) Kozachenko, Dmitriy N.; Vernigora, Roman V.; Balanov, Vladimir O.; Berezovy, Nikolay I.; Yelnikova, Lidiia O.; Germanyuk, Yuliya N.
ENG: The paper considers the issues of bulk conveyance organization between industrial enterprises on schedule. Currently the movement of the main part of freight trains is performed on preparedness and occupation processes of separate schedule train paths by some terminals are not fixed. And, due to the lack of statistical material on the punctuality of the schedule for the movement of freight trains, research of the passenger trains movement with subsequent dissemination of results on freight movement were carried out by the authors. The values of the additional time reserves that should be included in the schedule of trains, and the schedule for the turnover of freight trains to provide conditional interaction of railroads and industrial enterprises in Ukraine were proposed. The obtained results can be used for the technical-and-economic calculations of transition effectiveness of industrial enterprises for maintenance on schedule as well as in the development of schedule on the initial stages of testing technology.
Experimental Studies on the Strength of a Flatcar during Shunting Impacts
(MDPI, Basel, Switzerland, 2023) Vatulia, Glib; Gerlici, Juraj; Lovska, Alyona O.; Fomin, Oleksij V.; Okorokov, Andrii M.; Pavliuchenkov, Mykhailo; Petrenko, Dmytro; Kravchenko, Oleksandr
ENG: The increasing demand for container transportation makes it necessary to equip the wagon fleet with appropriate flatcars in good technical condition. The study deals with the determination of the strength of the flatcar during shunting impacts using the finite element method. The flatcar model 13-401 modernized with fixed fittings for securing containers on the frame was used as a prototype. The authors determined the fields of the maximum equivalent stresses in the bearing structure of a flatcar. The strength calculation was made in SolidWorks Simulation. It was found that, during a shunting collision, the maximum equivalent stresses to the flatcar were about 418 MPa and they were concentrated in the fixed fittings. The strength was also studied using the method of electric strain gauging. The research included different impact speeds. The test results showed that the maximum difference between the stresses obtained theoretically and experimentally was 17.0%. The strength model of the flatcar was tested using the Fisher criterion. The study demonstrated that the damage to the bearing structure of the flatcar and containers could be reduced when applying an improved interaction diagram.
Forecasting the Estimated Time of Arrival for a Cargo Dispatch Delivered by a Freight Train Along a Railway Section
(НВП ПП «Технологічний Центр», Харьків, 2019) Prokhorchenko, Andrii V.; Panchenko, Artem; Parkhomenko, Larysa; Nesterenko, Halyna I.; Muzykin, Mykhailo I.; Prokhorchenko, Halyna; Kolisnyk, Alina
ENG: This paper reports a method for predicting the expected time of arrival (ETA) of a cargo dispatch taking into consideration determining the duration at which a freight train travels along a railroad section where trains move not complying with a departure schedule. A characteristic feature of railroads with such a traffic system is the difficulty in predicting the stages of a transportation process, which necessitates the development of effective methods of forecasting. Based on correlation analysis, we have determined the dependence of the general macro-characteristics of train flow and individual parameters of a freight train on the duration of its movement along a section. It has been proposed to represent the dependence of predicted duration of train movement along a railroad section on the following factors: traffic intensity and density along a section, the proportion of passenger trains in total train flows, the length of a train and its gross weight. All experimental studies are based on actual data on the operation of the distance Osnova-Lyubotyn at the railroad network AO Ukrzaliznytsya. Based on a comparative analysis, using the indicators for accuracy and adequacy of several regression methods to predict ETA of cargo dispatch, we have chosen the regression model based on an artificial neural network MLP. To derive the MLP structure, a cross-validation method has been applied, which implies the validation of a mathematical model reliability based on the criteria of accuracy MAE and adequacy ‒ F-test. The structure of MLP has been obtained, which consists of five hidden layers. We predicted the time that it would take for a train to travel in facing direction along the Osnova-Lyubotyn section. For a given projection, the value for MAE was 0.0845, which is a rather high accuracy for this type of problems, and confirms the effectiveness of MLP application to solve the task on predicting a cargo dispatch ETA. The current study provides a possibility to design in the future an automated system for predicting a cargo dispatch ETA for a mixed-traffic railroad system in which freight trains depart not complying with a regulatory schedule.
Formation of Indexes System of the Sustainable Development of Railway Transport divisions
(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2014) Kharchenko, Olesia I.
EN: Purpose. The analysis of the national and foreign literature shows that the approach to the problem of sustainable development at present time has the coupled problem. On the one hand, the problem for today is relevant and it is the center of scientists’ attention. On the other hand, in existing research remains underdeveloped methodological and theoretical framework for the sustainable development of enterprises. The aim of the given work is to develop a system of indicators for sustainable development of railway transport divisions for further construction of mathematical models of functioning railway transport divisions from the standpoint of sustainable development. Methods. For achievement of this goal the concept of a sustainable development of the transport sector reveals. This refers to the development that can provide on balanced perspective solving problem of socio-economic development, reduce environmental impact and provide with the current and subsequent needs of different sectors of human activity. As the index characterizing development of railway transport divisions in the direction of resource-saving, it is offered to use integral criterion of efficiency; the ecological component of a sustainable development of railway transport divisions is offered to be evaluated based on the indexes reflecting brought to the money equivalent change of bursts of the contaminating substances in the atmosphere and noise environmental pollution; the social component of process of functioning railway transport divisions can be evaluated directly by the amount of monetary assignments on measures for salary increase of workers in divisions, and also on social programs (expenditures on health care, sanitarian resort expenditures, etc.) and programs for training of workers in divisions, and also were considered an index of development in the direction of service quality improvement. Results. As a result of the formation of the system of indicators for sustainable development of railway transport divisions were received the integral index, which reflects the basic principle of sustainable development. Academic novelty. The new development approach of the indexes system characterizing a sustainable development of railway transport divisions unlike the existing quantitative indices is offered (in particular on railway transport); don’t allow to estimate efficiency of actions and to provide the sustainable development. The indexes received in this operation allow carrying out an assessment to functioning of railway transport divisions from a line item of a sustainable development, namely: to implementation of resource-saving technologies, lowering of influence of technogenic system on environment, support of a social component of development, customer service improvement of quality. Practical importance. The structural reform of railway transport of Ukraine, which is held at present time, requires in the shortest time solving problems of industry improvement. The integrated index of sustainable development, proposed in the given work, allows evaluating the efficiency of the railway transport divisions from the standpoint of sustainable development.
Formulation of the Mathematical Model for the Planning System in the Carriage of Dangerous Goods by Rail
(IOP Publishing, 2020) Bibik, Svitlana I.; Strelko, Oleh; Nesterenko, Halyna I.; Muzykin, Mykhailo I.; Kuzmenko, Albina
ENG: The paper aims to the topical issue of improving the system in the planning of carriage of dangerous goods by rail subject to ensuring a high level of safety of the transport process and minimal costs for its implementation. Formalization of this process leads to the formation of an optimization task of the two-stage mathematical model. To implement the first stage, a mathematical model in searching the best route based on risk minimization is developed. In order to exclude the unacceptably complex and expensive options for the carriage of dangerous goods from the many possible routes, the authors abided by the condition not to exceed the critical operating costs. The second stage in the process of planning routes for dangerous goods takes into account the hazard identification study in the technological process of car movement with dangerous goods. Considering that the probability of a potential traffic accident is a complex random variable, which is due to a set of elementary previously unknown events, its estimation was made on the basis of the Bayesian approach. Based on the simulation results, the following reliability values are determined at which a transport accident should not emerge.
Freight Traffic Distribution Under Conditions of Limited Capacity of Railway Sections
(Institute of Technology and Business in České Budějovice, 2026) Taran, Ihor; Nurzhaubayev, Meiram; Korobiova, Ruslana H.; Grevtsov, Serhii V.; Prokopa, Oleh I.
ENG: The research aims to enhance methods for distributing freight flows across a railway network to ensure unhindered access to public railway transportation services for shippers. The study was conducted using the methodological framework of railway operation theory in conjunction with operations research methods. During the research, a method for distributing freight flows across a railway network, taking into account capacity constraints of specific sections, as well as a method for allocating additional transportation costs among shippers, is proposed. The originality of the research lies in improving the methodology for distributing freight flows across railway networks under capacity constraints. The proposed method makes it possible to consider the interests of individual shippers when using public railway transport by identifying sections with capacity constraints and adjusting tariff distances accordingly. The applied relevance is confirmed by the fact that implementing the results can improve methods of organizing wagon flows and determining freight tariffs, taking into account the interests of both railways and their customers.
Functional Simulation of Railway Stations on the Basis of Finite-State Automatа
(Silesian University of Technology, Poland, 2014) Bobrovskyi, Volodymyr I.; Kozachenko, Dmytro M.; Vernigora, Roman V.
ENG: The general scheme of railway station’s model and technique of formalizing the technologic processes at stations are described. To take into account the human impact on station’s operation is suggested to use ergatic models. In conformity with concept of stations’ ergatic models a person is directly involved into the simulation process and manages the station technological processes acting as a dispatcher. The formalization of technological processes for processing the objects is performed on the basis of deterministic finite-state automaton. Designed model can be used for optimization of technical and technological parameters of railway stations, as well as in computer simulators for training of railway traffic managers.
Improvement of Supervisory Control of Train Movement by Means of Introduction of Operational Zones
(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпро, 2018) Nesterenko, Halyna I.; Bekh, Petro V.; Muzykin, Mykhailo I.; Avramenko, Svetlana I.
ENG: Purpose. The work is aimed to investigate the feasibility of transferring automatic control to low-density stations of the sections (according to the principle of supervisory control of train line) to the operators at principal stations. Methodology. The article analyzes the work of heavy traffic sections of the Ukrainian Railways JSC. It was found out that the information workload of dispatchers who control the train movement at the sections of the main course, constantly exceeds the permissible level. The possibility of using the technology of supervisory control of train movement by the introduction of operational zones has been investigated. Findings. The authors found out that the capacity of receiving and departure tracks at the stations of the sections is extremely limited. The occupancy of passing loop by the out-of-work trains hinders any regulatory measures at the sections. Trains pass one after another without giving priority, that is, they pass through the section in the order in which they entered it. Due to the limited number of tracks at the front-line intermediate station, freight trains are set for passing by the passenger ones at the distant approaches. This leads to a loss of service speed and reduces the level of utilization of the sections` working capacity. The introduction of operational zones will significantly reduce information flows and facilitate the work of the train dispatchers at the, create the necessary conditions for creative decision-making on the internal section regulation, and will contribute to increase in the service speed of trains. Originality. The article developed a new technology to improve the management of train sections by dividing them into operational zones. In each zone, consisting of two or three passes, the train movement can be controlled by the duty officer of the principal station, performing in this case the functions of the train dispatcher. Practical value. It has been proposed to put trains from technical stations that idle due to uneven movement, especially the trains from the terminal stations (division points) of the locomotive circulation sections, to reserve routes of the front-line intermediate stations. Laying the reserve tracks and their content, taking into account the frequency of use and reduced allowable speed, can be allowed according to less tight standards for the construction of the roadbed, ballast section, sleeper density, taking into account the use of switches and decommissioned tracks.
Improvement of the Analysis Methods of the Working Hours` Distribution of Locomotive Crews by the Types of Train Operation in Freight Traffic
(Dnipro National University of Railway Transport named after Academician V. Lazaryan; Les Ulis: EDP Sciences-Web of conferences, 2019) Kozachenko, Dmytro M.; Berezovyi, Mykola I.; Malashkin, Vyacheslav V.; Bolvanovska, Tetiana V.; Grimak, Yurii
ENG: Abstract. The work is aimed to increase the efficiency of cargo transportation by railway transport by improving the work organization of locomotive crews. The research is based on the methods of organization of operational work of railways and the methods of mathematical statistics. The problem of increasing the use efficiency of working hours of locomotive crews in freight traffic is considered in the article. Based on the statistical data processing of drivers' routes, the working hours` distribution of locomotive crews for different types of train operation in freight traffic for four locomotive depots was performed. During the research, a conditional division of the working time of locomotive crew by the type of work was performed, if the crew worked with trains of various categories. The algorithm for assigning the idle time and empty running of locomotive to certain types of train operation was also developed. The work originality lies in the fact that it improves the methods of analysis of the working hours` distribution of locomotive crews for certain types of train operation in freight traffic. The developed methods give an opportunity to evaluate the work specifics of individual locomotive depots and provide the initial data for planning the use of locomotives and the work and rest schedule of locomotive crews.
Improvement of the Automated Control Technology of Trains Traffic with Dangerous Goods
(IEEE, 2021) Bibik, Svitlana I.; Nesterenko, Halyna I.; Muzykin, Mykhailo I.; Kuzmenko, Albina
ENG: This article is devoted to the actual issue of improving the automated control technology of trains traffic with dangerous goods due to the addition of the existing set of tasks. These tasks are solved on the basis of operating automatized working places of dispatching personnel, by the software for decision-making support system developed on the basis of the graph of the Bayesian Belief Network that describes the security status of trains traffic en route. The scientific value of the article lies in the development of new technology for planning and managing the transport of dangerous goods through intelligent support for decisions at the tactical and operational levels.
Improvement of the Method for Standardizing the Duration of Rail Cars Shunting
(НГУ, Дніпро, 2021) Kozachenko, Dmytro M.; Gera, Bogdan V.; Manafov, E. K.; Gorbova, Aleksandra V.; Korobiova, Ruslana G.
ENG: Purpose. To improve the method for calculating the time standard for shunting cars from track to track in order to take into account the local operating conditions of railway stations and railway sidings. Methodology. During the research, the methods of theory of railway operation were used. The problem of calculating the time standard for shunting operation was solved as the problem of searching the optimal division of train set into the car groups to achieve minimal time consumption for shunting operation. Findings. In the course of the study, the methods for calculating the time standards for initial and fi nal operations, as well as movements performed when shunting cars from track to track were improved. It was proved that the minimum time spent on shunting cars from track to track was achieved when the train set was divided into the minimum possible number of parts and the cars were shunted in the longest possible groups and one remaining group. It was also established that with suffi cient accuracy for engineering problems the duration of shunting train set from track to track can be represented by the piecewise linear function of the car number in it. Originality. The work originality consists in improving the method for calculating the time standard for shunting cars from track to track, that, unlike the existing one, takes into account the length limitations of the car groups being shunted from track to track, as well as the actual composition of operations performed in the process of shunting. Practical value. The use of the developed method allows setting time standards for shunting cars from track to track, taking into account the local operating conditions of railway stations and sidings of industrial enterprises. The method also makes it possible to simplify solving problems of searching the optimal order of performing more complex shunting operations, such as sorting cars into several tracks, collecting cars on one track, train formation, and others.
Improvement of the Method of Time Rationing for Assembling Car Groups on One Track
(Dnipro University of Technology, Dnipro, Ukraine, 2024) Kozachenko, Dmytro M.; Gera, Bogdan V.; Taran, Ihor; Korobiova, Ruslana H.; Malashkin, Vyacheslav V.; Hermaniuk, Yuliia M.
ENG: Purpose. To improve the method for standardizing the duration of the shunting operation of assembling cars on one track. This can be achieved as a result of solving the following research problems: development of a method for searching the optimal order of assembling cars on one track; distribution parameters estimation of the random value of the duration of shunting operation of assembling cars on one track based on calculation experiments. Methodology. During the research, the methods of theory of railway operation, dynamic programming and mathematical statistics were used. Findings. Research on the assembling process of car group to one track established the distribution parameters of the random variable of time spent for shunting. In the course of the research, the problem of choosing the optimal order of shunting operations during car assembling was formalized and solved as a problem of dynamic programming. The time spent for shunting work was chosen as the optimality criterion. The paper considers the possibility of approximating the data of calculation experiments by analytical dependencies. It was found out that the use of linear polynomials with interaction allows obtaining dependencies describing time standards with a relative accuracy of ±5 %. Originality. The method is improved for developing the time standards for shunting work, which, unlike the existing one, is based on the performance of a series of calculation experiments, each of which solves the optimization problem of finding such an order of assembling cars that ensures minimum time consumption for shunting. Practical value. The methods developed in the work and the dependencies obtained allow improving the quality of decisions made when developing technology and designing railway stations and sidings of industrial enterprises.
Improving the Efficiency of Multi-Group Trains Formation
(Kaunas University of Technology; Publishing House "Technologija", 2019) Kozachenko, Dmytro M.; Bobrovskyi, Volodymyr I.; Skovron, Ihor Ya.; Jablonskyte, J.
ENG: The formation of multi-group trains is one of the typical tasks solved in the process of operational work of railways. The purpose of this study is to reduce the time spent on shunting operations associated with the formation of multi-group trains. The studies are performed using the method of simulation modeling. The method of searching for a rational order of multi-group train formation was improved. It is based on the statistical evaluation of the variety of simulation modeling results of shunting movements, the sequence of which is determined using the various methods and formation schemes. The choice of the best method and the scheme of train formation makes it possible to reduce the duration of shunting by 7.1-23.3% when using a flat shunting neck and by 8-11% when using a sorting hump. The methods presented in this paper make it possible to develop software products for the automated preparation of shunting plans for the formation of multi-group trains at the stations.
Improving the Methods of Estimation of the Unit Train Effectiveness
(Silesian University of Technology, Poland, 2016) Kozachenko, Dmytro M.; Vernigora, Roman V.; Balanov, Volodymyr O.; Sannytskyy, Nazar М.; Berezovy, Nikolay I.; Bolvanovska, Tetiana V.
ENG: Summary. The article presents the results of studies of freight transportation by unit trains. The article is aimed at developing the methods of the efficiency evaluation of unit train dispatch on the basis of full-scale experiments. Duration of the car turnover is a random variable when dispatching the single cars and group cars, as well as when dispatching them as a part of a unit train. The existing methodologies for evaluating the efficiency of unit trains’ make-up are based on the use of calculation methodologies and their results can give significant errors. The work presents a methodology that makes it possible to evaluate the efficiency of unit train shipments based on the processing of results of experimental travels using the methods of mathematical statistics. This approach provides probabilistic estimates of the rolling stock use efficiency for different approaches to the organization of car traffic volumes, as well as establishes the effect for each of the participants in the transportation process.
Improving Transport Logistics of Extractive Industry Products in the Context of Capacity Constraints on the Railways
(Dnipro University of Technology, Dnipro, Ukraine, 2022) Aldanazarov, K.; Toktamyssova, A.; Karsybayev, Y.; Korobiova, Ruslana G.; Kozachenko, Dmytro M.
ENG: Purpose. To improve the distribution methods of freight flows on the railway network under conditions of capacity constraints. Methodology. Methods of railway operation theory and operations research were used. The problem of cargo flow distribution on the railway network was solved as a multi-product (interchangeable cargoes) transport linear programming problem with capacity constraints in the network form. The average cost of freight transportation is established by the methods of probability theory. Findings. In the course of the research the methods of cargo traffic calculation on the railway network are improved. The proposed approach to the formalisation of the task makes it possible to take into account the presence of different cargoes to be transported, capacity constraints of some railway network sections, as well as non-linear nature of dependence between the volume and cost of transportation. To meet the requirement of consignors’ equal access to public carrier services, the method for calculating the cost of transportation for an individual consignor is improved. Originality. Scientific novelty of the paper consists in improvement of methods of cargo traffic distribution on the railway network and tariffing of cargo transportation services in conditions of restricted supply capacity of separate sections. Practical value. The extractive industries have a steady flow of goods. The main logistic tasks in this case are to ensure transportation of the given volume of cargo and reduce the cost of transport services. Using the proposed mathematical methods of optimization allows you to get higher-quality solutions compared to the method of technical-economic comparison of options, which provides an overall cost reduction for cargo transportation. The improved method of tariffication of transportation can reasonably allocate the savings from reducing the cost of transportation among cargo consignors and thus reduce their logistics costs.