建立有初始安装偏转角和轮径差的轮对受力平衡方程,计算LM、LMA和S1002等3种踏面轮对处于平衡时的轮对冲角和横移量.以国产高速列车为例建立车辆动力学模型,基于FASTSIM算法和Braghin踏面磨耗模型分析初始安装偏转角和轮径差对车轮磨耗的影响.结果表明:初始安装偏转角对平衡后轮对冲角影响较大,轮径差主要影响轮对横移量;低的踏面等效锥度在制造误差存在时更容易形成大的轮对冲角和横移量;初始安装偏转角和轮径差会导致车轮出现严重的偏磨,且磨耗率随着偏转角和轮径差的增加而急剧增大;有安装偏转角和轮径差时,踏面等效锥度越大,车轮踏面磨耗率越小;运行速度对车轮磨耗的影响与初始安装偏转角和轮径差的大小有关.%The force equilibrium equations of the wheelset with the initial deflection angle and radius difference were built,and the attack angles and lateral displacements of wheels, which with the LM,LMA and S1002 profile respectively, were calculated. Taking the China-made high speed train as an example, the dynamical model of vehicle was built. The influence of the initial deflection angle and radius difference on wheel wear were analyzed on the basis of the FASTSIM algorithm and Braghin wear model. The research results indicate as follows:The initial deflection angle has great effect on the attack angle and the radius difference has great effect on the lateral displacement;great attack angles and lateral displacements are evenmoreliable to be caused by the low equivalent conicity of the treed when manufacturing errors exist; serious eccentric wear is produced by the deflection angle and radius difference, the wear ratio increases rapidly with increasing of the deflection angle and radius difference;the larger the equivalent conicity of the tread,the smaller the wear ratio of the tread;the influence of the running speed on wheel wear is related to magnitude of the deflection angle and radius difference.
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