轮轨曲线尖叫噪声有限元预测方法的研究  

Study on the Finite Element Prediction Approach to Wheel/Rail Curve Squeal

作　　者：何宏高[1] 陈光雄[1] 丁涛[1] 

机构地区：[1]西南交通大学摩擦学研究所牵引动力国家重点实验室,四川成都610031

出　　处：《润滑与密封》2009年第4期17-20,共4页Lubrication Engineering

基　　金：国家自然科学创新研究群体科学基金资助项目(50521503);973项目资助(2007CB714703)

摘　　要：利用ABAQUS有限元软件,对车辆经过小半径曲线时的尖叫噪声进行有限元预测分析。建立了包括车轮、钢轨和钢轨支撑弹簧的有限元动力学模型。根据车轮通过小半经曲线时横向蠕滑力饱和的实际情况,假设横向蠕滑力等于摩擦因数乘以法向力,通过摩擦力耦合建立车轮和钢轨耦合的动力学方程。对此动力学方程进行稳定性分析,得出耦合系统动力学特征方程的复特征值。根据是否存在实部为正的复特征值,从而判断系统是否有发生曲线尖叫噪声的趋势。计算结果显示,当轮轨摩擦因数比较大时,系统存在实部为正的复特征值,说明此时轮轨系统存在发生曲线尖叫噪声的可能性。此外,钢轨端部不同约束条件对曲线尖叫噪声预测结果有一定的影响。Squeal when a train negotiates a tight curve was predicted using the finite element sottware ABAQUS. The finite element model of the wheeL/rail system with rail support springs was established. When a vehicle negotiates a severe curve track,the lateral creep force of the leading wheelset becomes generally saturated, that is, equal to the normal force multiplied by the friction coefficient. The motion equations of the wheeL/rail system were established by friction coupling between the wheel and rail. The complex eigenvalues of the motion equations were obtained by solving their characteristic equations. If the real part of an eigenvalue is positive, the corresponding mode is unstable, which may result in squeal. The analysis result shows that when the coefficient of friction between wheel and rail is high,there are positive real parts of eirail have some influence on the prediction results of wheeL/rail curve squeal.

关 键 词：摩擦 噪声 尖叫 有限元 ABAQUS 

分 类 号：TH117.1[机械工程—机械设计及理论]