Study on the influencing factors in the development process of high-speed train wheel polygon

High-level wheel polygon wear is common in high-speed EMUs. Wheel polygon wear causes high-frequency vibration of vehicles and track systems, which seriously affects the safe operation of vehicles. Some key influencing factors are of great significance for restraining wheel polygon wear. In this paper, a long-term wear iterative model is established by combining the coupled vehicle/track dynamic model with the Archard wear model, which is used to simulate the whole development process of high-speed train wheel polygon. The development process of wheel polygon is simulated when the vehicle runs at 300 km/h. The simulating results are consistent with the actual situation. It is found that changing the speed of the vehicle can prevent the rapid development of the wheel polygon of a fixed order, so as to slow down the development of the wheel polygon. As the wheel hardness increases, the roughness level gradually decreases. If there is corrugation in the rail, it will greatly accelerate the development of wheel polygon, especially when the wavelength of rail corrugation can divide the wheel circumference. In addition, with the increase of rail corrugation amplitude, the promoting effect will gradually increase.