中文摘要：

对某地铁线路轮轨磨耗进行测试，分析实测型面与CN60钢轨匹配的轮轨接触几何关系，并利用Kalker三维弹性体非赫兹滚动接触理论对轮轨接触力学特性进行分析。利用UM多体动力学软件建立某B型地铁车辆动力学仿真模型，分析轮轨磨耗对车辆动力学性能及轮轨接触损伤特性的影响。结果表明：该线路车轮踏面磨耗较均匀，存在明显轮缘磨耗现象。不同运行里程下实测车轮踏面外形基本相似，导致车轮磨耗对轮轨接触几何关系、轮轨接触力学特性及车辆动力学性能的影响较小。实测轮轨匹配下的动力学性能略有下降。随着运行里程增大磨耗指数变化不大，表明车轮磨耗稳定。车轮磨耗后表面疲劳指数大于标准型面，出现滚动接触疲劳的可能性增大。

英文摘要：

The wear profiles of wheel-rail of a metro line were investigated. The contact geometry between worn wheel profile and new CN60 profile was analyzed. The wheel-rail contact mechanics such as contact patch area and contact pressure were calculated with Kalker＇s non-Hertzian theory of three-dimensional elastic bodies in rolling contact. A dynamic model of B-type metro vehicle was implemented in UM, an MBS dynamic software. The influence of wheel wear on metro vehicle dynamic performance and wheel-rail rolling contact fatigue properties was investigated. The results indicated that wheel tread wear was uniformly distributed, while the flange wear was severe. As the measured wheel profiles had almost the same shape in different running mileages, wheel wear had no significant effect on wheel-rail contact geometry, contact mechanics and vehicle dynamic performance. However, vehicle dynamic performance of the worn wheel and rail profiles was worse than that of measured wheel and new CN60 profiles. The values of wheel wear index slightly changed with the increase of running mileage, which indicated that the wheel wear was in a stable stage. The fatigue index of rolling contact surface of worn wheel was larger than that of the standard LM profile. Therefore, the rolling contact fatigue was more likely to occur on worn wheels.