直线电机地铁车辆的车轮磨耗特性及动力学性能试验研究

Experimental Investigation of Wear Characteristic and Dynamic Performance of Linear Metro Vehicles

对国内某直线电机地铁线路轴箱内外置列车的车轮磨耗规律和动力学性能进行了现场调查、特征对比以及形成机理的理论研究。通过两种车型不同镟后运行里程的车轮磨耗测试,分析了两种轴箱布置方式车辆的车轮磨耗形式、分布区域及磨耗速率的演变规律。通过正线运行动力学测试,对两种车型镟轮前后的运行平稳性和稳定性进行了对比研究。研究结果表明,镟后6万公里前,轴箱内置车辆的车轮踏面磨耗小于轴箱外置车辆,镟后里程达到10万公里以上时,两种车型的磨耗量相当。轴箱外置车辆的运行平稳性和稳定性优于轴箱内置车辆,同时对轮轨状态的适应性更好。基于两种车型的车辆结构特征及其与动力学性能的相关分析,揭示了两种车型车轮磨耗和动力学性能差异的内在机理,明确了两种车型的动力学特性,并提出了两种车型的优化设计建议。

Field survey and theoretical analysis on the wear characteristic and dynamic performance of linear metro vehicles with inner/outer axle box layouts are carried out respectively.The wear form,wear range and wear rate are compared based on the test results of the worn wheel profiles of two types of vehicles with different axle-box layouts in different mileages.The ride quality and running stability of the two types of vehicles are also analyzed based on the running tests before and after wheel reprofiling.The test results indicate that the vehicle with inner axle-box has lower level of wheel wear when the mileage is less than 60,000 km after wheel reprofiling.The two types of vehicle have similar wheel wear rate when the running mileage after wheel reprofiling is more than 100,000 km.The vehicle with outer axle-box have better ride quality and running stability.The intrinsic mechanisms of the differences in wheel wear and dynamic performance of the vehicles with two types of axle box layouts are discussed on the basis of the analysis of the vehicle structures and their dynamic properties.The suggestions on the optimization of the two types of vehicles are also proposed respectively.