Russian Federation
Russian Federation
Russian Federation
Purpose: To determine the wheel-rail wear rate with increased axial load and a car underframe specific design. Methods: Statistical analysis of the cause-and-effect relationship of the factors affecting the dynamics of a train car passing over the track irregularities; in-depth analysis of the wheel-rail interaction system. This analysis allows assessing the causes of existing problems in the field of railway rolling stock operation as well as substantiating emerging issues, and proposing relevant up-to-date solutions and promising developments in the railway industry. Results: Statistical data on the wheelset technical condition collected over several years have shown an increase in wheel rolling surface defects, which is due to not only a variety of the underframe design features, but also rolling stock driving behaviour and rail response. Increased speeds of rolling stock movement and growth in the transported goods volume and quantity lead to an intensified rolling stock operation. Hence, increased loads on the train car units and components, and, respectively, increased wear intensity of the parts. Practical significance: The strategy for the wear intensity development made it possible to define various parameters causing longitudinal forces in the wheel-rail system. The software calculations have demonstrated that wheel rolling surface defects cause increased creep forces. The analysis has revealed that the defects can be divided into several standard groups according to amplitude fluctuations.
Wheel-rail, rolling surface defects, car dynamics, wear rate of parts, locomotive-car-track system
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