轮轨多点接触计算新方法曲线通过验证.pdfVIP

第 46 卷第 16 期 机 械 工 程 学 报 Vol.46 No.16 2 0 1 0 年 8 月 JOURNAL OF MECHANICAL ENGINEERING Aug. 2 0 1 0 DOI ：10.3901/JME.2010.16.001 轮轨多点接触计算新方法曲线通过验证* 1 2 任尊松 金学松 1. 北京交通大学机械与电子控制工程学院 北京 100044 ； 2. 西南交通大学牵引动力国家重点实验室 成都 610031 摘要：建立包含多点接触轮对振动方程的车辆—轨道系统动力学模型，对轮轨多点接触计算和判定新方法—迹线极值法进行 车辆曲线通过验证，给出曲线通过接触点在车轮踏面上位置、轮轨接触点数和轮轨法向力。结果表明，迹线极值法能够解决 轮轨多点接触问题并获得准确的轮轨多点接触几何参数和系统振动特性；当发生轮缘根部和轮缘两点接触时，采用多点接触 方法得到的结果比采用单点接触方法得到的结果更为合理可信，当不发生轮缘根部和轮缘两点同时接触时，多点接触法与单 点接触法得到的结果几乎完全一致；与新用车轮踏面相比，测试得到的磨耗后车轮踏面在其名义直径位置凹陷区域附近容易 形成踏面两点接触。证实了轮轨多点接触新方法的正确性和有效性。 关键词：轮轨多点接触 动态曲线通过 轮缘接触 踏面磨耗 中图分类号：U211 Verification for New Wheel-rail Muti-point Contact Method 1 2 REN Zunsong JIN Xuesong 1. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044; 2. Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031 Abstract ：A vehicle-track system dynamic model, including multipoint contact wheelset vibration equations, is built to carry out curve negotiation verification of a new calculation and decision method for wheel-rail multipoint contact─trace line extremum method. The position of curve negotiation contact points on the wheel tread, the number of wheel-rail contact points and the wheel-rail normal force are presented. The result shows that the trace line extremum method can solve the wheel-rail multipoint contact problem and obtain the accurate geometric parameters of wheel-rail multipoint contacts and the system vibration characteristics. When two-point contact of wheel flank root and wheel flank occurs, the result obtained by using multipoint contact method is more reasonable and reliable than that by using single-point contact method. If no simultaneous two-point contact of flank root and flank, the results by multipoint contact method and by single-point are almost in full agreement. Compared t