Browsing by Author "Tatarinоvа, Valentyna А."

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Research of Locomotive Mechanics Behavior
(Дніпропетровський національний університет залізничного транспорту ім. акад. В. Лазаряна, Дніпро, 2018) Tatarinоvа, Valentyna А.; Kаlіvоdа, Jan; Neduzha, Larysa O.
EN: Purpose. The main purpose of the study is to compare and confirm the results of theoretical studies of locomotive motion along the straight and curved track sections in the set range of operating speeds, which is essential for determining their dynamic qualities. The conducted research complex is one of the prerequisites for improving the reliability of the rolling stock mechanics, in particular the bogie parameters. Methodology. The research was carried out by numerical integration of the dynamic loading of a railway vehicle using one of the modern software complexes. In this study we used the mathematical model of locomotive spatial oscillations obtained using Lagrangian equations of the second kind. Findings. Authors carried out theoretical research and performed the analysis of the vehicle behavior during the motion along the track section, which in the vertical plane has no geometric defects, and taking into account the inequalities on the example of the main locomotive. The researches were carried out both analytically and with the help of the modern software complex. Comparison of the graphs shows that the results obtained by different methods coincide with sufficient accuracy. Originality. Based on the results of many years of work, the authors present the General Classification of Locomotive Mechanics, which may be useful to researchers, who are involved in the assessment of the dynamic qualities of new and upgraded types of rolling stock. Practical value. A new licensed modern software complex has been applied, which makes it possible to use it in the design, modeling of units of rolling stock and their elements; during theoretical and experimental studies, comparison of their results. The results of theoretical research can be taken into account for the preliminary research during creating the reliable constructions of a new vehicle, further improvement of the mechanics, modernization of the existing units of rolling stock during field tests.
Stability Research of the Main-Line Locomotive Movement
(Kaunas Univ. of Technology, Lithuania, 2019) Lunys, O.; Neduzha, Larysa O.; Tatarinоvа, Valentyna А.
EN: Abstract To ensure an increase in the design speed with simultaneous improvement of the traction, braking and dynamic qualities of the rolling stock, to increase the level of traffic safety and reduce accident rates the main-line locomotive was considered. A complex of theoretical research of free oscillations, factoring in viscous friction and forced oscillations, was carried out. When considering forced oscillations, the irregularity of a railway track in the vertical direction, due to the rail joints, was taken into account. Graphs of changes in the vertical movements of a body and a bogie were obtained both analytically and using a software package. The results of theoretical research correlate with the experimental data, which allows at the first stages of designing the new rolling stock units (according to the authors) to significantly reduce the cost for field tests.