关键词: 高速列车, 刚柔耦合, 车轮多边形, 轮轨动态特性, 磨耗演化

Abstract: In order to explore the influence of the initial characteristics of the wheel polygon on the dynamic characteristics of the wheel and the long-term wear evolution behavior, a long-term prediction model suitable for calculating the wear of the wheel polygon was established, which included a rigid-flexible coupling dynamic model considering the flexibility of the wheelset and a calculation model of the wear of the wheel polygon, numerically simulated the wheel-rail dynamic response caused by different initial orders and amplitudes, analyzed the influence of the combined order/amplitude-velocity interaction on the wheel-rail interaction, and further reproduced the evolution behavior of the wheel polygon under different initial characteristics. The results show that the initial order and amplitude of the wheel polygon affect the vibration amplitude and vibration period of the wheel-rail dynamic characteristics. It will also make the wheel wear work derive higher-order harmonics and promote the formation of higher-order polygons. It will also aggravate the wear evolution rate of the wheel polygon. In addition, the initial amplitude of the wheel polygon will affect the long-term evolution trend and wear position of the wheel polygon, and the initial characteristics of the wheel polygon have a certain influence on the dominant order and amplitude of the higher-order polygon.

Key words: High-speed train, Rigid-flexible coupling, Wheel polygon, Wheel-rail dynamic characteristics, Wear evolution