Influence of wheel diameter difference on their stability against derailment

Abstract

In railway transport, there is a very acute problem of intensive wear of the lateral surface of the tread and wheel flanges. Traffic safety and dynamic loading of rail vehicles largely depend on the technical condition of their running gear. Therefore, this research is devoted to the study of the influence on the stability of the wheel from derailment of deviations in the running gear of cars that inevitably arise during their operation. To assess the impact on the stability of the wheel from derailment, the differences in the diameters of the wheels of one wheelset, as well as the differences in the diameters of the wheels of the wheelsets of one bogie, are considered. A freight car was chosen as the most numerous type of rail vehicle, and a four-axle gondola car was taken among the freight cars. The values of the wheel derailment factor are obtained taking into account the specified deviations of the technical condition of the wheelsets within the existing tolerances in operation.