考虑轮轨碰撞的转向架蛇行振动的非线性分析  

Nonlinear analysis of hunting vibration of truck due to wheel-rail impact

作　　者：丁旺才[1] 谢建华[1] 王俊涛[2] 

机构地区：[1]西南交通大学应用力学与工程系,四川成都610031 [2]兰州交通大学机电工程学院,甘肃兰州730070

出　　处：《兰州理工大学学报》2004年第1期45-49,共5页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(10072051);教育部高等学校博士学科点专项科研基金(20010613001)

摘　　要：考虑系统中干摩擦力和轮轨相互碰撞作用等非线性因素,建立了3个自由度的货车转向架非线性横向振动数学模型.应用数值方法研究了货车转向架蛇行振动的Hopf分叉、临界速度及转变速度,表明蛇行振动存在两个Hopf分叉不变圈,一个是稳定的,另一个是不稳定的.进一步分析了参数变化时对蛇行振动临界速度及临界不变圈的影响.　Taking some nonlinear factors such as dry friction and wheel-rail impact into consideration, a mathematical model of nonlinear hunting vibrations of the truck is established for a truck of railway freight car with 3 degree freedom. The Hopf bifurcations, critical speed, and transforming speed of the hunting vibration of the truck are investigated by numerical method. The results indicate that there exist two invariant circles from Hopf bifurcation, one being stable and the other unstable. The influence of parameter change on the critical speed and amplitude of critical invariant circles is analyzed further as well.

关 键 词：转向架 非线性 轮轨碰撞 蛇行运动 干摩擦力 机车车辆系统 

分 类 号：U270.11[机械工程—车辆工程] U270.33[交通运输工程—载运工具运用工程]