基于钢轨模态振动的车轮高阶多边形研究

Research on Wheel Polygonization Based on Rail Modal Oscillation Analysis

基于线路动力学试验数据,分析了具有高阶规则车轮多边形磨耗车辆转向架各部件振动水平及振动传递关系,给出车轮多边形磨耗引起转向架异常振动典型的频率特征和多边形振动对相邻车轮的影响。基于铁木辛柯梁理论及传递矩阵法,推导转向架对钢轨作用时两轮对范围内钢轨模态振动方程,分析了钢轨模态振动特性,讨论了边界条件与温度对钢轨模态振动的影响。分析了引起车轮多边形化的振动频率的来源,利用哈大线、武广线的枕跨距离计算得到钢轨第三阶垂向弯曲主频分别与各自车轮多边形振动频率重合,为车轮多边形机理分析提供支撑。

Based on the dynamic test data, the vibration level and vibration transmission of the components of the bogiewith wheel polygonization were analyzed. The typical frequency characteristics of the vibration of the bogie caused by wheelpolygonization were provided, and the influence of polygon wear on adjacent wheelset was analyzed. Based on the Timoshenko theoryand the transfer matrix method, the vibration equation of the rails in the range of two wheelsets was deduced and the modal vibrationcharacteristics were analyzed. The influence of the boundary conditions and temperature on the mode of the rail was discussed.The source of wheel polygonization frequency was analyed. And based on the parameter of Wuhan-Guangzhou and Haerbin-Dalianhigh-speed railway, the third-order vertical bending frequency of the rail coincided with the wheel polygonization frequency, whichprovided basis for the mechanism study of wheel polygonization.