高阶多边形谐波激励下轮轨接触仿真分析  

Simulation Analysis of Wheel-Rail Contact Under High-Order Polygonal Harmonic Excitation

作　　者：吴威威 贺冠强 李榆银 周鸿敏 文奇豪 曾文杰 万伟伟 殷盛福 袁雪姣 WU Weiwei;HE Guanqiang;LI Yuyin;ZHOU Hongmin;WEN Qihao;ZENG Wenjie;WAN Weiwei;YIN Shengfu;YUAN Xuejiao(Zhuzhou CRRC Times Electric Co.,Ltd.,Zhuzhou 412001,China)

机构地区：[1]株洲中车时代电气股份有限公司,湖南株洲412001

出　　处：《机械》2025年第3期60-65,共6页Machinery

基　　金：国家重点研发计划(2021YFB3400700)。

摘　　要：为研究高阶多边形激励对CR450轮轨接触的影响,利用仿真软件建立转向架高频激振试验台的轮-轮接触有限元模型。首先采用隐式求解法对轮-轮静态接触进行了分析。其次基于等效轨道激扰法提出在小滚轮上施加谐波位移激励模拟车轮多边形的方法,并采用显式求解法分析了时速440 km/h、波深0.05 mm的20阶谐波激励下的轮-轮滚动振动接触行为,轮-轮垂向力最大值和最小值相对静载荷的轮重增/减载率分别为75.3%和70.4%,轮-轮横向力和纵向力稳定后的最大值很小。仿真结果表明,接触压力受小滚轮直径的影响,大于实际轮轨接触压力;多边形谐波位移对轮轨垂向力的影响显著,对横向力和纵向力影响很小;接触斑形状大小仅取决于施加于车轮上的小滚轮垂向力大小。To study the effect of polygonal harmonic excitation on wheel-rail contact of CR450,a wheel-roller contact finite element model of the bogie’s high frequency excitation test bench is established based on the simulation analysis software.Firstly,the implicit solution method is adopted to analyze the static contact between the wheel and the roller.Secondly,a method for simulating wheel polygon by applying harmonic displacement excitation on small rollers is proposed based on the model of equivalent track excitation,and the wheel-roller rolling vibration behavior under 20 order polygon excitation at 440 km/h and 0.05 mm depth is solved by using explicit solution method.The vertical wheel-roller force increase and decrease rates relative to the static load are 75.3%and 70.4%.The maximum lateral and longitudinal wheel-roller forces after stabilization are very small.The simulation results show that the contact pressure is influenced by the diameter of the roller and is greater than the actual wheel-rail contact pressure.The polygonal harmonic displacement has a significant impact on the vertical wheel-rail force,but little impact on the lateral and longitudinal wheel-rail forces.The shape of the contact spot only depends on the vertical force applied to the wheel by the small roller.

关 键 词：多边形激励 试验台 轮轨垂向力 接触斑 

分 类 号：U270[机械工程—车辆工程]