武广客专动车组车轮磨耗及振动性能跟踪研究

WuGuang Lines EMU’s Wheel Wear and Vibration Performance Tracking and Research

通过对武广客专动车组车轮踏面和车辆振动性能的长期跟踪测试,得到车轮踏面磨耗、等效锥度和振动性能随运行里程的变化规律。将等效锥度作为评估车轮踏面磨耗程度的参数,探讨了车轮踏面磨耗对振动性能的影响。最后通过对比武广客专动车组降速前后车轮磨耗和车辆振动数据的差异,分析了速度下降对车辆振动性能和车轮磨耗的影响。结果显示,车轮踏面磨耗量随运行里程增加逐步增大,运行里程大于15万km后,车轮踏面磨耗速度呈逐渐增大趋势;武广客专两种不同踏面外形的主要磨耗区域基本相同,但最大磨耗位置不同;轮轨等效锥度不仅可以评估车轮踏面磨耗程度,还直接影响构架横向失稳的频率、幅值;其他条件不变的情况下,速度的调整对车轮踏面磨耗和振动性能影响显著。

The variation trend of the wheel tread wear, the wheel/rail equivalent conicity and vehicle vibration performance have been researched with a long term tracking and measuring of the Wuhan-Guangzhou Passenger-Dedicated I.ines EMU＇s wheel tread and vehicle vibration. By use of wheel/rail equivalent conicity as the assessment parameters of wheel tread wear, how the vehicle vibration are influenced by the wheel tread wear was discussed. Finally, the effects of speed adjust to the wheel tread wear and vehicle vibration were analyzed by comparing the difference of the wheel tread wear and vehicle vibration, and the effect for wheel tread wear and vehicle vi bration because of the decline of speed have been studied. Results showed that wheel tread wear increases with the increase of running mileage, and after 150,000 km, wheel tread wear rate gradually increased; the two different wheel profiles in Wuhan-Guangzhou Pas senger Dedicated Lines basically have the same wear area, but the maximum wear position is different; the wheel/rail equivalent conicity can not only estimate the wheel tread wear level, but also affect the frequency and amplitude of the bogie sway; With the other conditions remain unchanged, the change of speed can influence the wheel tread wear and vibration significantly.