Кафедра Транспортні вузли (КТВ ДІІТ)

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UKR: Раніше кафедра "Станції та вузли".
ENG: Department of Transport Hubs. Formerly known as the Department of Stations and Hubs.

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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.
Adaptive Management of Transport Logistics in Agricultural Enterprises
(Academic Research Publishing Group (ARPG), 2022) Deineha, Oleksandr; Chymosh, Kateryna; Kobylynska, Tetiana; Nazarov, Oleksii A.; Liapa, Mykola; Sapotnitska, Nataliia
ENG: Agriculture is a complex logistics system with some features and limitations. The logistics system usually operates in conditions of pronounced uncertainty, characteristic random processes, so the aim of the article is to study and develop recommendations for improving the adaptability of transport logistics management in agricultural enterprises. In the article, the authors considered the specifics of logistics processes occurring in agriculture. The importance of cooperation in the development of logistics of the agro-industrial complex formed based on intersectoral cooperation of public transport enterprises, institutions, service and infrastructure organizations, which have separate transport units, united by technological and economic ties, and use a variety of resources of the region for the formation and implementation of transport services. The financial content of cluster development as a tool of competitiveness and innovative activity of agricultural enterprises is reflected, which allows realizing the available potential to increase sales.
Agent-Based Simulation Model of Multimodal Iron Ore Concentrate Transportation
(National University of Life and Environmental Sciences of Ukraine, Kyiv, 2023) Namazov, Manafaddin; Matsiuk, Viacheslav; Bulgakova, Iuliia; Nikolaienko, Iryna; Vernyhora, Roman V.
ENG: Most global supply chains are implemented through the use of some different types of transport. This especially applies to general cargo: iron ore, oil, grain. As the participants in the transport process increase, the risks of delays, interoperational downtime, and delays in deliveries increase. Therefore, the improvement of multimodal cargo transportation remains an urgent scientific and applied problem. The aim of studying was to research technical and operational parameters of the multimodal supply chain of cargo delivery (on the example of iron ore concentrate). The research's aim of the study was realized by the development of an agent-based simulation model. The simulation model is implemented in the Any Logic Research Edition environment with Java SE, as this toolkit allows combining discrete-event and agent-based approaches in the simulation simultaneously. As a result of the experiment with the developed simulation model, it was found that: 1) approximately 40% of the delivery time is spent waiting for the transport unit to load (8%) and freight being under collecting up to the loading rate into the transport unit (33%); 2) the sensitivity experiment of the model has determined that of all the variable technological parameters of the basic model, the difference in the ratio between the rate of loading of the railway train and the sea vessel has the greatest influence on the average time of freight delivery; 3) the relationship between the capacity of the vessel (with a constant rate of mass shipment into the railway train) and the average time of shipment collecting to the rate of loading into the vessel in case of accidental arrival of freight by rail in the transshipment terminal is highly approximate linear dependence. The results of the research can be used to improve the logistics chains for the delivery of iron ore concentrate from Ukraine to other countries.
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.
Assessing the Feasibility of Electric Road Transport in Europe Using the Integral Emissions Index
(The Silesian University of Technology, Katowice, Poland, 2025) Bosyi, Dmytro O.; Zemskyi, Denys R.; Biltsan, Kostiantyn M.; Borycheva, Svitlana V.
ENG: This article reviews the development of electric road transport and assesses its feasibility in European countries based on an analysis of CO₂ emissions using an integral index. Electric road transport is evolving in three main directions: battery-powered vehicles, hydrogen fuel cell vehicles, and road electrification. Battery electric vehicles are widely used, but their future may be constrained by issues related to cost, charging infrastructure, and raw material availability. Hydrogen-powered vehicles offer fast refueling but require substantial investments and strict safety standards. Road electrification includes both contact and wireless energy transfer systems. Contact-based systems, in particular, provide high power and low energy losses, making them optimal for vehicles with significant energy demands. The environmental efficiency of electric vehicles largely depends on the electricity source. Countries with a high share of renewable energy, such as Norway and France, demonstrate greater environmental efficiency in electric vehicle adoption. Special attention should be given to road electrification, which reduces the duration of battery-powered autonomous driving and allows for smaller battery sizes, thereby extending their lifespan. This approach not only increases battery longevity but also has a positive environmental impact by reducing emissions associated with battery production and disposal.
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.
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.).
Complex Simulation Model of Train Breaking-Up Process at the Humps
(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2015) Demchenko, Evhen B.
ENG: Purpose. One of the priorities of station sorting complex functioning improvement is the breaking-up process energy consumptions reduction, namely: fuel consumption for train pushing and electric energy consumption for cut braking. In this regard, an effective solution of the problem of energy consumption reduction at breaking-up subsystem requires a comprehensive handling of train pushing and cut rolling down processes. At the same time, the analysis showed that the current task of pushing process improvement and cut rolling down effectiveness increase are solved separately. To solve this problem it is necessary to develop the complex simulation model of train breakingup process at humps. Methodology. Pushing process simulation was done based on adapted under the shunting conditions traction calculations. In addition, the features of shunting locomotives work at the humps were taken into account. In order to realize the current pushing mode the special algorithm of hump locomotive controlling, which along with the safety shunting operation requirements takes into account behavioral factors associated with engineer control actions was applied. This algorithm provides train smooth acceleration and further movement with speed, which is close to the set speed. Hump locomotive fuel consumptions were determined based on the amount of mechanical work performed by locomotive traction. Findings. The simulation model of train pushing process was developed and combined with existing cut rolling down model. Cut initial velocity is determined during simulation process. The obtained initial velocity is used for further cut rolling process modeling. In addition, the modeling resulted in sufficiently accurate determination of the fuel rates consumed for train breaking-up. Originality. The simulation model of train breaking-up process at the humps, which in contrast to the existing models allows reproducing complexly all the elements of this process in detail and evaluate accurately its quality, was improved by the author. Practical value. The developed model can help to determine a rational processing mode of sorting complex. For this purpose, it is appropriate to include the model into the decision support system of dispatching station staff.
Construction of a Simulation Model of Goods Delivery in International Road Transportation Taking into Account the Functioning Efficiency of Logistics Supply Chain
(PC TECHNOLOGY CENTER, 2023) Lebid, Ievgenii; Luzhanska, Nataliia; Lebid, Iryna; Mazurenko, Alexander; Halona, Inesa; Horban, Anatolii; Mykhailenko, Iryna; Medvediev, Ievgen; Sotnikova, Tetiana
ENG: The object of this study is the process of goods delivery in international road transport using various types of logistics chains. The problem being solved is due to the need to develop recommendations for exporters of goods to reformat or design new supply chains during wartime. The expediency of organizing foreign trade operations by the cargo owners' own forces or with the involvement of enterprises providing logistics consulting services is considered. A simulation model of goods delivery in international road traffic was built and implemented in the GPSS World simulation automation package. The model involves the optimization of organizational and technological processes related to the activity of both a separate link and the entire supply chain. The study takes into account the components of the time characteristics of the performance of preparatory work when establishing cooperation with institutions and organizations, as well as the direct service of the exporter. The application of the developed model in practical activities will provide an opportunity for exporters to obtain information about the duration and reliability of the stages of a foreign trade operation and the feasibility of involving consulting enterprises in cooperation. At the same time, the simulation results reflect the performance indicators of the proposed supply chains when delivering goods by road transport along various routes. The proposed simulation model will make it possible to reduce the time spent searching for links in the formation of a supply chain by 8–12 %, and the duration of a foreign trade operation by 10–14 %. Thus, the reliability of cooperation with intermediary organizations will increase by 8–11 %.
Construction of a Simulation Model of the Work of a Transport and Forwarding Enterprise in Organizing Multimodal Cargo Transportation
(TECHNOLOGY CENTER PC, Kharkiv, 2024) Lebid, Ievgenii; Luzhanska, Nataliia; Lebid, Iryna; Mazurenko, Alexander; Roi, Maksym; Mykhailenko, Iryna; Yelnikova, Lidiia O.; Tihov, Oleksii
ENG: The object of this study is the process of rendering transport and forwarding services when organizing multimodal cargo transportation in international traffic. The task to tackle was predetermined by the need to devise recommendations for choosing the optimal cargo transportation route, taking into account the individual requirements of the customer and performance indicators of the forwarders at the transport and forwarding company. A simulation model of the work of a transport and forwarding company in the organization of multimodal transportation of goods was built and implemented in the GPSS World simulation automation software. The model involves the optimization of the duration of service provision and makes it possible to determine the required number of transportation department specialists to enable effective cooperation with customers. When constructing the model, the duration of business processes in the organization of multimodal transportation was taken into account. In addition, the model accounts for the probability of errors and service delays, as well as the average delay time when errors occur, which will make it possible to take into account the additional work time of the forwarder to eliminate them. The application of the built model in practice will allow specialists at transport and forwarding companies to organize multimodal transportation according to several alternative routes that meet the individual needs of the customer. It will also make it possible to determine the optimal number of forwarders needed to work at the multimodal transportation department. In this case, the duration of rendering transport and forwarding services will be reduced by 12–16 %, the waiting time in queues for service will decrease by 9–13 %, and the efficiency of the work of specialists at the multimodal transportation department will increase by 9–14 %.
Construction of a Simulation Model of the Work of a Warehouse Enterprise as a Link in the Logistics Chain
(TECHNOLOGY CENTER PC, Kharkiv, 2025) Lebid, Ievgenii; Luzhanska, Nataliia; Lebid, Iryna; Mazurenko, Alexander; Mykhailenko, Iryna; Sharai, Svitlana
ENG: This study investigates the process of organizing the work of a warehouse enterprise when servicing customers. The task set is to devise recommendations for planning the staffing of a warehouse enterprise, taking into account the duration of rendering services to customers. A simulation model of the work of a warehouse enterprise when servicing customers has been built and implemented in the GPSS World simulation modeling automation package. The model involves determining the duration of warehouse service and determining the required number of personnel to enable the work of the business entity by areas of activity. When constructing the model, the duration of the types of work performed at individual stages of service performed by the warehouse enterprise personnel when processing foreign trade cargo was taken into account. In addition, the model takes into account the probability of errors and delays in rendering warehouse services at each stage of the business entity’s work, as well as the average delay time in the presence of errors. This can make it possible to determine the duration of additional employment of the enterprise personnel associated with the elimination of errors made in all types of work. Applying the devised model in practice will allow owners of warehouse enterprises to organize and plan activities of the business entity when servicing customers. This will also make it possible to determine the duration of rendering warehouse services when performing foreign trade operations, taking into account the indicators of the efficiency of specialists. At the same time, the probability of refusal to provide warehouse services to customers could decrease by 17% while the throughput capacity of the enterprise would increase by 22%.
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.
Crisis and Risk Engineering for Transport Services
(Talcom, Kyiv, 2022) Chernova, Nataliia S.; Hajiyev, Nofal; Halan, Olha; Matsiuk, Viacheslav; Bulgakova, Iuliia; Khurshudov, Ilgar; Najimov, Arif; Valiyeva, Sapargul; Hudaygulyyev, Nuraly; Demchenko, Yevhen B.; Dorosh, Andrii S.; Khara, Maryna; Nikolaienko, Iryna; Lyamzin, Andrii; Samsonkin, Valerii; Meredova, Maral; Halmamedov, Habib; Yurchenko, Oksana; Myradov, Yolly; Garajayev, Atageldi; Dashdamirov, Fuad; Zohrabov, Nijat; Sharifov, Allahverdi; Chernova, Nataliia S.; Lewczuk, Konrad
ENG: Materials of scientific and practical research within the framework of the implementation of the project of the program of the European Union Erasmus+ «Crisis and Risks Engineering for Transport Services» (CRENG) are presented in the monograph. Issues of the impact of crisis situations on the work of transport enterprises and ways to increase the efficiency of the functioning of transport and logistics systems in conditions of crises and risks are considered. The publication is intended for scientific and pedagogical workers, graduate students and students of higher education, as well as managers and specialists of industrial enterprises and business structures, who are interested in the current state and prospects of the development of scientific research.
Determination of Braking Optimal Mode of Controlled Cut of Design Group
(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Діпропетровськ, 2015) Dorosh, Andrii S.
ENG: Purpose. The application of automation systems of breaking up process on the gravity hump is the efficiency improvement of their operation, absolute provision of trains breaking up safety demands, as well as improvement of hump staff working conditions. One of the main tasks of the indicated systems is the assurance of cuts reliable separation at all elements of their rolling route to the classification track. This task is a sophisticated optimization problem and has not received a final decision. Therefore, the task of determining the cuts braking mode is quite relevant. The purpose of this research is to find the optimal braking mode of control cut of design group. Methodology. In order to achieve the purpose is offered to use the direct search methods in the work, namely the Box complex method. This method does not require smoothness of the objective function, takes into account its limitations and does not require calculation of the function derivatives, and uses only its value. Findings. Using the Box method was developed iterative procedure for determining the control cut optimal braking mode of design group. The procedure maximizes the smallest controlled time interval in the group. To evaluate the effectiveness of designed procedure the series of simulation experiments of determining the control cut braking mode of design group was performed. The results confirmed the efficiency of the developed optimization procedure. Originality. The author formalized the task of optimizing control cut braking mode of design group, taking into account the cuts separation of design group at all elements (switches, retarders) during cuts rolling to the classification track. The problem of determining the optimal control cut braking mode of design group was solved. The developed braking mode ensures cuts reliable separation of the group not only at the switches but at the retarders of brake position. Practical value. The developed procedure can be successfully used to determine the optimal braking modes of cuts in automation systems of trains breaking up on the gravity humps.
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 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 a Cargo Customs Complex Operation as a Link of a Logistic Supply Chain
(РС Тесhnology Сеntеr, Kharkiv, Ukraine, 2021) Mazurenko, Alexander; Kudriashov, Andrii V.; Lebid, Iryna H.; Luzhanska, Nataliia O.; Кravchenya, Irina N.; Pitsyk, Maksym
ENG: The main link in the logistics supply chain is the cargo customs complex. It provides customs and logistics services to cargo owners during the export and import of goods, complex services, placement of goods in a customs warehouse and a temporary storage warehouse. To substantiate the choice of the optimal logistics supply chain and optimize the work of the cargo customs complex, it is proposed to use simulation modeling. The model of operation of the logistics chain and the cargo customs complex is presented in a general form. The proposed model is implemented in the GPSS World simulation automation package. Testing the simulation model involved checking its adequacy. Checking the adequacy of the simulation model, which showed the maximum value of the t-statistic of 1.424 with a critical value of 1.85, proved its compliance with the work of a real object. After completing the adequacy check, the simulation error was estimated, which was 3 % with an allowable 5 %, due to the presence of pseudo-random number generators in the simulation model. Thus, the simulation error is insignificant for this study. For the cargo customs complex, an example of the simulation results is given. Based on the results of simulation modeling, it is possible to determine: the optimal type of the logistics supply chain and the optimal structure of the cargo customs complex. A wide range of tasks that the proposed simulation model can solve is presented. Thus, the developed simulation model will make it possible to analyze and improve the modes of operation of the cargo customs complex. In addition, it will allow to get an informed decision regarding the use of a certain type of logistics supply chain.
Development of a Simulation Model of the Activities of a Transport and Forwarding Enterprise in the Organization of International Road Cargo Transportation
(РС Тесhnology Сеntеr, Kharkiv, Ukraine, 2023) Lebid, Ievgenii; Luzhanska, Nataliia; Lebid, Iryna; Mazurenko, Alexander; Roi, Maksym; Medvediev, Ievgen; Sotnikova, Tetiana; Hrevtsov, Serhii
ENG: The object of this study is the process of planning the work of a transport and forwarding company when serving different categories of customers who need organizational support for the delivery of goods by road transport in international traffic. The solved problem is due to the need to devise recommendations for organizing the work of forwarders when interacting with customers of transport and forwarding services that export or import different categories of cargo. A simulation model of the transport and forwarding company’s work in customer service was developed and implemented in the GPSS World simulation automation package. The model provides for the optimization of organizational and management processes in cooperation with customers of transport and forwarding services. When developing the model, the duration of the types of work in which freight forwarders are involved in the export and import of goods by road transport was taken into account. The model also predicts the probability of errors in the forwarder’s work and the duration of their elimination. The application of the developed model in practice will enable the owners of transport and forwarding companies to plan the full-time number of forwarders and the duration of service provision under different conditions of interaction with customers. The simulation results reflect the performance indicators of the enterprise in serving different categories of customers. This will make it possible to optimize the work of the enterprise by planning personnel support. At the same time, the duration of transport and forwarding services will be reduced by 10–15 %, the capacity of the enterprise will increase by 6–11 %, and the reliability of service provision will increase by 8–14 %.
Development of a Simulation Model of Transport Enterprise Operation when Carrying Various Types of Cargo along International Routes
(TECHNOLOGY CENTER PC, Kharkiv, 2025) Lebid, Ievgenii; Luzhanska, Nataliia; Lebid, Iryna; Mazurenko, Alexander; Halona, Inesa; Tihov, Oleksii
ENG: This study’s object is the process that organizes and plans the work of a transport enterprise when transporting general, dangerous, and oversized cargo along international roads. The task addressed is the need to compile recommendations for determining the required number of personnel and the duration of rendering transport services depending on the type of cargo received for service. A simulation model of the work of a transport enterprise when organizing international road transportation has been built and implemented in the GPSS World simulation modeling automation package. The model involves determining the duration of transport service and planning the personnel support for a transport enterprise according to the functional division of labor. When building the model, the duration of the types of work provided by specialists of the transport enterprise when transporting general, dangerous, and oversized cargo was taken into account. In addition, the model takes into account the probability of errors and delays at each stage of service. The average duration of the delay in the event of errors is also determined, which could make it possible to set additional time for engaging a separate specialist to eliminate them. The application of the devised model in practice would allow owners of transport enterprises to organize business processes depending on the available type of rolling stock. It could also make it possible to determine the optimal number of specialists of various profiles required for organizing transport services for the customer. At the same time, the duration of transport services for the delivery of various types of cargo will be reduced by 8–14% while the number of specialists of the transport enterprise – by 10–15%; in turn, the throughput will increase by 7–16%.
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.
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.
Forming an Automated Technology to Actively Monitor the Transportation of Dangerous Cargoes by Railroad
(ПП «Технологічний Центр», Харків, 2020) Lavrukhin, Oleksandr; Vernyhora, Roman V.; Schevcenko, Vitaliy; Kyman, Andrii; Shulika, Olha; Kulova, Daria; Kim, Kateryna
ENG: The approach has been proposed to form automated technology in order to actively monitor the transportation of dangerous goods by railroad. The reported approach to the dynamic description of trains' status has been developed on the basis of modifying the language of trains' status in the form of abstract modeling of operational processes. This will ensure the fastest implementation of decision-making algorithms by the operational personnel at the powerful support from the automated complex of dispatching control. It has been determined that the maximum effect of the implementation of the proposed approach could be obtained by synthesizing it with a system of active monitoring of moving units' traffic. Modeling an arbitrary case involving a train, which can occur in real operational circumstances, has made it possible to predict the violation of a normative train schedule and to simulate the cognitive process of decision-making by a train dispatcher to rationally resolve a complicated train situation under changing operational conditions while accounting for a significant number of factors. Modifying the language of train-related cases could adequately produce the spatial-time description of train situations along a simulated section, whereby it is the closest to the language of the dispatching personnel. The advantages of the proposed approach are that it makes it possible to form a database and a knowledge base as quickly as possible in order to form a working model of the system of dispatching control. A given system has been developed on the basis of the imitation of the cognitive activity of the human operator, thereby providing an opportunity to deepen the implementation of artificial intelligence systems on railroads. These innovations could help achieve the maximum level of safety in the transportation of dangerous goods while simultaneously and unconditionally reducing operating costs and gaining higher profits.
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.
Identification of the Railway Reconstruction Parameters at Imposition of High Speed Traffic on the Existing Lines
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Lebid, Iryna; Kravchenya, Irina; Dubrovskaya, Tatyana; Luzhanska, Nataliia; Berezovyi, Mykola I.; Demchenko, Yevhen B.
ENG: Abstract. The problems of railroad design technical reconstruction aimed at ensuring train protection in introduction of high-speed traffic on the rail lines have been addressed. The description of railroad technical system with certain specific features has been proposed. The pair of mutually dual problems regarding the optimal reconstruction of railway curves for raising train speeds at minimal capital investments has been addressed. The problem of determining the optimal speeds of trains of each category under optimum outer rail cant, increase of the unbalanced acceleration value, compliance with the condition of uniform load on rail tracks, comfortable carriage of passengers, in which reduced costs on increased speeds in curved tracks will be minimal has been formulated. To achieve the goals of the study, mathematical optimization techniques and algorithms of analysis of the rail lines of different nature are used. This, by finding and value engineering optimization, allows to minimize high-value and lengthy procedures of physical simulation. As a problem-solving technique, Lagrange multiplier method and its applicability have been proposed. Numeral solution to the problem of selection of certain stretches for increasing rolling stock speeds on operating lines without reconstruction or with minimum expenses on reconstruction of contour of track has been reviewed.
Improvement of Customs and Logistics Services in Ukraine
(Kaunas University of Technology, Kaunas, Lithuania, 2021) Lebid, Iryna H.; Luzhanska, Nataliia O.; Mazurenko, Oleksandr O.; Kudriashov, Andrii V.; Кravchenya, Iryna N.
ENG: Ukraine has a significant transit potential, which is not fully realized. To increase the cargo transit volume, it is necessary to attract carriers by simplifying customs clearance formalities and offering additional logistics services. The paper considers the possibility of using a logistics chain providing customs and logistics services to the customer at cargo customs complexes in order to consolidate all necessary operations related to the export of goods in the country of origin to the maximum extent. Besides, it is also compared with existing logistics chain variations that are already operated.
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 Effectiveness of the Process of Separation of Composition on the Sorting Humps
(Дніпровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпро, 2019) Kudriashov, Andrii V.; Mazurenko, Oleksandr O.; Sharapaniuk, K.
ENG:The purpose of the study is dedicated to improving the quality of sorting process using the developed method to determine rational regimes of the train breaking up. These modes provide maximum of reliability division of the wagon cuts at switches, as well as the possibility of implementing a safe speed collision of wagons in marshalling tracks. Methodology. Investigations of the separations of the cut of the train at switches were carried out using sim- ulation modeling. For research, we used the model for the running cut from sorting hump, which allows us to realize the set exit speeds from the brake positions when adjusting the braking zone of the cut. Findings. A quantitative as- sessment of the indicators of the sorting process was carried out using the developed method for optimizing the braking modes of the cuts to control the process of decomposition of trains on one of the sorting hump of Ukraine. The performed analysis of the results showed sufficient efficiency of the developed method, which can be recom- mended for calculating the exit speeds of cuts from brake positions in automation systems of the sorting process. The braking modes obtained as a result of optimization can provide a sufficiently high quality of interval regulation, as well as the possibility of realizing a safe approach speed of cuts to vagons on the sorting paths of automated humps. The scientific novelty of the work is to prove the effectiveness of the considered method of optimizing the composition breaking mode. Practical value of the thesis as well as developed models and methods can be used to create an automated process control system for breaking up of the stocks on sorting humps, as well as to assess the quality of the construction of projected sorting humps. Automation of humps will help to improve the economic per- formance of stations, reduce the cost of processing cars, save energy for braking cuts and hunting, improve working conditions and safety of workers of the sorting hump.
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.
The Influence of Customs and Logistics Service Efficiency on Cargo Delivery Time
(National Aviation University, Kyiv, 2019) Luzhanska, Nataliia; Lebid, Iryna; Kotsiuk, Oleksandr; Kravchenya, Irina; Demchenko, Yevhen B.
ENG: The formation of a logistics chain with the use of a freight customs complex for customs and logistics service provision requires detailed research and investigation into technical, technological and organizational constraints that may affect overall cargo delivery time. Actors in the transport market, while interacting with customs authorities, have to take into account customs legislation requirements and road transport complex operational characteristics, since non-compliance with them will cause a number of delays due to the need for corrective actions and will also entail a number of penalties. In order to increase the accuracy of delivery time planning, it is considered the procedure for customs and logistics service provision involved in cargo export and import as well as for stowing cargo in a customs warehouse or a temporary storage warehouse. It is also addressed the issue of comprehensive service provision to entities engaged in foreign economic activities using a freight customs complex. The most widespread violations requiring additional correction time are identified. It is considered the technological constraints connected with the handling capacity of the research object. The influence of the organization and planning of a freight customs complex`s operation on its efficiency is determined. It is proposed to consider the lack of available resources provided by customs infrastructure facilities and the excessive idle time of vehicles as a factor in delivery time planning The paper findings can be implemented in the operation of freight customs complexes in cooperation with private sector enterprises and state organizations when performing foreign trade operations.
Influence Research of Traffic Prediction Accuracy on Effective Management of the Trains Breaking-Up Order
(Silesian University of Tecnology, Katowice, Poland, 2016) Bardas, Oleksandr O.; Skovron, Ihor Ya.; Demchenko, Yevhen B.; Dorosh, Andrii S.
ENG: The article presents the research results of management processes in order of trains breaking-up on marshalling yards. The objective of this article is determination the area of rational use of trains breaking-up order models. Model of trains breaking-up order selection is formalized in the form of stochastic programming task. With the help of simulation modeling was obtained the dependence, describing the impact of trains arrival forecasting error and sizes of car traffic processing on reducing operating costs of the marshalling yards through the management of trains breaking-up order. The investigations can establish the requirements for accuracy of information support of operational planning tasks necessary for achieving the desired economic effect of the management of trains breaking-up order.
Introduction of Bimodal Technologies for Transportation of Grain Cargoes
(KTU, Lithuania, 2023) Malashkin, Vyacheslav V.; Berezovyi, Mykola I.; Korobiova, Ruslana H.
ENG: The purpose of the study is to evaluate the effectiveness of bimodal grain cargo transportation in containers in comparison with other methods of their delivery to seaports. The studying of the grain transportation process is carried out using the methods of mathematical statistics, computer simulation and the theory of organization of railway operational work. Estimation of variants of transportation organization was carried out using the methods of economic-mathematical modeling. The originality of the work is that it received the dependence of the cost of grain cargo delivery on the distance, taking into account the design features of rolling stock and the specific functioning of railway stations for its processing. The practical significance of the work lies in the fact that the implementation of its results allows reducing the logistics costs of grain cargo transportation.
Mathematical Modelling of the Communication Channel between the Rail Circuit and the Inputs Devices of Automatic Locomotive Signalization
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Hololobova, Oksana O.; Buriak, Serhii Yu.; Havryliuk, Volodymyr I.; Skovron, Ihor Ya.; Nazarov, Oleksii A.
ENG: Abstract. In modern practice of operating under traffic safety conditions, the traffic light signal must be transmitted to the locomotive that moves to it, and duplicate in the driver's cab. However, this communication channel is not protected from external interference. In order to prevent the occurrence of code failure, it is necessary to create conditions under which the automatic locomotive signalling system will distinguish between signals with useful information, from signals with false information. The best way to solve this problem at the first stage is to model the devices. Using the simulation tools of graphical environment of simulation modelling Simulink from Matlab software environment, the software model of the communication channel between the railroad and the input devices of automatic locomotive signalling system was constructed. The created mathematical model with the actual parameters allows us to obtain diagnostic signs of a proper condition, on the basis of which the research is aimed at the identification, recognition and definition of various types of malfunctions, failure, damages and defects in the work of the constituent elements of the system and the signal transmission channel of the automatic locomotive signalling system.
A Method for Optimization of Time Intervals between Rolling Cuts on Sorting Humps
(Springer, Heidelberg, 2018) Kozachenko, Dmytro M.; Bobrovskyi, Volodymyr I.; Demchenko, Yevhen B.
ENG: Abstract Sorting humps are the main technical means providing the breaking- and making-up of freight trains. 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. However, for wider introduction of such systems at the humps, it is necessary to reduce their cost. One of the main tasks of hump control systems is the determination of the optimal cars exit speeds from the retarders. Its solution is significantly complicated because of the uncertainty of cars rolling resistance coefficient, wind velocity and direction, retarder control errors. The paper is aimed at solving the problem of searching for such cars exit speeds from the retarders that provide the longest time intervals between them at the switches. Implementation of this method will make it possible to improve 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. The research results, when solving the problem of searching for cars exit speeds from the retarders, allow us to move from searching for the maximum of a nonlinear non-smooth function of two variables to solution of an equation with one variable, which significantly accelerates and simplifies the solution to the problem.
Methodology of Railway Networks Research
(Днепропетровский национальный университет железнодорожного транспорта имени академика В. Лазаряна, Дніпропетровськ, 2013) Chibisov, Yuriy V.; Mozolevych, Grygoriy Yа.; Мозолевич, Григорій Якович
EN: The analysis of the relationships between speed, trainflow density and intensity of the train at the railway line was made. The interconnection between the incoming and outgoing flows of trains and the density of trains was established. There was also established the interconnection between the incoming flow and the speed; the average travel time of trains on the line and the accuracy of the speed. In the course of freight transportation its technological process is influenced by lots of random factors. Without the assessment of these factors with the help of determined models for planning and management of the transportation process its efficiency may decrease considerably.
Multi-Criteria Evaluation of Professional Qualities of Railway Dispatching Personnel Using Computer Simulations
(Dnipro University of Technology, Dnipro, 2022) Ursarova, A.; Mussaliyeva, R.; Mussabayev, B.; Kozachenko, Dmytro M.; Vernyhora, Roman V.
ENG: Purpose. Development of a formal method to evaluate professional training of operating and dispatching personnel of railway stations. Methodology. Simulation approaches to generate performance indicators of a human dispatcher under the specified operational conditions are selected as well as techniques of cluster and discriminant analysis to evaluate the obtained results. Findings human factor is one of the main factors determining the performance of technical systems in general and the efficiency of a railway transportation system in particular. Analysis of the transport accident causes demonstrates that from 63 to 95 % of them are related to some extent to a human factor. In this regard, a problem of objective assessment of dispatching staff training quality and its effect on the indices of railway transportation functioning, including the operation safety is reflected in this article. Based on investigations carried out and the results obtained the operator training simulator of railway station was developed. Originality. A simulator is improved of the railway station functioning while using deterministic finite automat formalizing the procedures. The proposed approach helps simulate processes taking place at the railway stations and resulting from the correct actions by operators as well as the incorrect ones. In addition, the paper proposes the improved method to evaluate professional training of station operators based upon the cluster and discriminant analysis providing HF impact minimization in the process of the problem solving. Practical value. The approaches have been proposed to apply while developing training equipment for station operators. On the one hand, formal methods of cluster and discriminant analysis help provide human participation in the evaluation of professional training of station operators at the stage of training sample formation to be analysed. On the other hand, they make it possible to identify the trainee affiliation with a group of the defined training level and prevent from HF impact while evaluating training results of certain applicants.