Abstract The wheel-wear characteristics of the motor and unpowered car of a high-speed train were investigated, for the first time, by a wheel-wear prediction model comprising a wheel-wear sub-model, an unpowered car dynamics sub-model, and a novel motor-car dynamics sub-model. The motor-car dynamics model considers the detailed structural characteristics and working mechanics of the traction transmission system. Assuming the real track parameters and track irregularities, it handles the nonlinear factors such as the traction characteristics, gear backlash, time-varying mesh stiffness, gear friction and wheel–rail contact. This study assessed the wheel-wear characteristics of a high-speed train by suitable performance indices (wheel-wear depth and contact patch energy). Finally, the model was validated by comparing the simulation results with those of field tests. The predicted and measured wheel wear were in good agreement. Both the wheel wear depth and contact energy were higher for the motor car than the unpowered car, because the traction torque on the wheelsets of the motor car increased the longitudinal creepage. During one re-profiling cycle, the transmission stability of the gear transmission system worsened with continuous wheel-wear. Furthermore, the proposed methods can assess the wheel wear and working status of the traction transmission system in the vehicle vibration environment of any rail vehicle.

中文翻译：

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高速列车电机与无动力车车轮磨损分析

摘要 首次采用由车轮磨损子模型、无动力汽车动力学子模型、以及一种新颖的汽车动力学子模型。动车动力学模型考虑了牵引传动系统的详细结构特征和工作力学。假设真实的轨道参数和轨道不平整度，它处理非线性因素，如牵引特性、齿轮齿隙、时变啮合刚度、齿轮摩擦和轮轨接触。本研究通过合适的性能指标（车轮磨损深度和接触面能量）评估了高速列车的车轮磨损特性。最后，通过将模拟结果与现场试验的结果进行比较，对该模型进行了验证。预测的和测量的车轮磨损非常一致。与无动力汽车相比，动车的车轮磨损深度和接触能都更高，这是因为动车轮对上的牵引扭矩增加了纵向爬电距离。在一次重新成型周期中，齿轮传动系统的传动稳定性随着车轮的持续磨损而恶化。此外，所提出的方法可以在任何轨道车辆的车辆振动环境中评估牵引传动系统的车轮磨损和工作状态。因为汽车轮对上的牵引力矩增加了纵向爬电距离。在一次重新成型周期中，齿轮传动系统的传动稳定性随着车轮的持续磨损而恶化。此外，所提出的方法可以在任何轨道车辆的车辆振动环境中评估牵引传动系统的车轮磨损和工作状态。因为汽车轮对上的牵引力矩增加了纵向爬电距离。在一次重新成型周期中，齿轮传动系统的传动稳定性随着车轮的持续磨损而恶化。此外，所提出的方法可以在任何轨道车辆的车辆振动环境中评估牵引传动系统的车轮磨损和工作状态。