摘要
基于线路动力学试验数据,分析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,分析车轮多边形磨耗对车辆动力学性能的影响。基于铁木辛柯梁理论及传递矩阵法,推导转向架作用下两轮对范围内钢轨模态振动方程,分析其模态振动特性,为探寻车轮多边形磨耗产生机理提供支撑。讨论支承刚度对钢轨模态振动主频的影响,为工务部门维护轨道规避特定频率提供参考及依据。
A dynamic test for research of high-speed EMU wheel polygonization is carried to investigate the hypothesis that modal vibration is the source of wheel polygonization frequencies on the China Railway High-speed trains. This paper analyzes the vibration level and vibration transmission of the components of the bogie. The typical frequency characteristics of the vibration of the bogie caused by wheel polygonization are given, and the influence of the wheel polygonization wear on the dynamic performance of the vehicle is ana- lyzed. Based on the Timoshenko theory and the transfer matrix method, the vibration equation of the rails in the range of two wheelset is deduced and the modal vibration characteristics are analyzed, which can support the mechanism of the abrasion of the polygons of the wheels. The influence of bearing stiffness on the frequency of rail mode vibration is discussed, which provides reference and basis for the maintenance of the track to avoid the specific frequency.
出处
《铁道机车车辆》
2017年第4期6-11,共6页
Railway Locomotive & Car
基金
国家自然科学基金(51205325)
关键词
多边形磨耗
频率特征
振动传递
模态分析
polygon wear
frequency characteristics
vibration transmission
modal analysis
