CR200J型动车组车轮磨耗及动力学性能分析

Analysis of Wheel Wear and Dynamic Performance of CR200J EMU

摘要: 本文基于多体系统动力学软件UM，以CR200J为研究对象，建立了车辆动力学模型。借助UM软件对构建的车辆模型进行磨耗仿真；轮轨接触关系采用LM型踏面与60 kg/m钢轨。将标准轮轨和仿真得到的在不同运行里程下的预测磨耗轮轨的踏面轮廓、磨耗深度以及等效锥度对比观察变化轨迹。对其磨耗前后的临界速度、Sperling平稳性指数、脱轨系数、轮重减载率等进行了分析。分析结果表明车轮踏面磨耗量的增加，车辆稳定性、车辆横向平稳性、运行安全性性能都有一定程度下降。

Abstract: This article utilizes the multi-body system dynamics software UM and focuses on CR200J as the subject to establish a vehicle dynamics model. The UM software is employed to simulate the wear of the established model. The wheel-rail contact relationship is matched with LM-type treads and standard 60 kg/m steel rails. By comparing and analyzing the variation patterns of tread profile, wear depth, and equivalent taper between standard and worn wheel treads under different operating mileages, an analysis was conducted on the critical speed, Sperling stability index, derailment coefficient, and wheel load reduction rate before and after wear. The analysis results indicate that an increase in wheel tread wear leads to a certain degree of decrease in vehicle stability, lateral stability, and operational safety performance.