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针对动车组的1节车辆,利用WP—D车轮外形测量仪定期实测每个车轮的外形与轮径,得到5组车轮型面磨耗工况,并结合所选车辆的结构参数和运行线路特点,利用多体动力学软件进行了车辆动力学仿真,分析了车辆在不同磨耗工况下的动力学特性.仿真结果表明:为保证车辆400 km/h以上的临界速度,车轮等效锥度应不大于0.4;磨耗车轮的型面下凹深度超过2 mm时,车辆运行安全性和曲线通过性能将显著下降,在最恶劣工况时,平稳性指标增幅达54%,轮轴横向力增大了100%.
Aiming at a section of an EMU vehicle, the shape and wheel diameter of each wheel are regularly measured by using a WP-D wheel profile measuring instrument to obtain five sets of wheel surface wear conditions. Based on the selected vehicle structural parameters and operating characteristics, The dynamic characteristics of the vehicle under different wear conditions are analyzed by using the multi-body dynamics software.The simulation results show that the equivalent cone of the wheel should not be greater than the critical speed of the vehicle above 400 km / h 0.4; When the concave depth of the worn wheel surface exceeds 2 mm, the running safety and curve passing performance of the vehicle will decrease significantly. In the worst condition, the stability index increases by 54% and the lateral force of the axle increases by 100% .