基于ANSYS轨道不平顺条件下轮轨系统频谱动力响应分析  

Modal / spectrum Dynamic Response Analyses of Wheel / rail System under the Condition of Track Irregularity Based on ANSYS

作　　者：魏云鹏[1] 吴亚平[1] 陈鄂[1] 段志东[1] 王良璧[2] 

机构地区：[1]兰州交通大学土木工程学院,兰州730070 [2]兰州交通大学机电工程学院,兰州730070

出　　处：《铁道标准设计》2015年第5期51-54,共4页Railway Standard Design

基　　金：国家自然科学基金重点项目(51236003)

摘　　要：为了分析轮轨系统在轨道不平顺功率谱激励下的动力响应,根据动力学原理并结合有限元理论,建立了轮轨接触的有限元模型,对轮轨系统进行静力分析和频谱分析,获得轮轨接触的基本特性和轮轨系统不同部位位移和加速度响应的谱值,计算结果表明,车体竖向位移最大谱值对应的频率为1.669Hz,而其最大加速度谱值所对应的频率为105.25Hz;车轴和车轮底面最大竖向位移和加速度谱值所对应的频率分别为66.27Hz和66.28Hz;同时结果显示,位移和加速度响应谱值随着列车运行速度的增加也是逐渐变大的。In order to analyze the dynamic responses of wheel/rail system under the condition of track irregularity, the finite element model of wheel/rail system is established based on the dynamic principle and finite element method, static and modal/spectrum analyses of wheel/rail system are carried, and basic contact characteristics of wheel/rail, displacement and acceleration response spectrum values of wheel/rail system in different parts are obtained. The results show that the maximum vertical displacement spectrum values of train body correspond to the frequency of 1. 669 Hz, while the maximum acceleration spectrum values of train body correspond to the frequency of 105. 25 Hz. The maximum vertical displacement and acceleration spectrum values of axle and bottom wheel correspond to the frequency of 66. 27 Hz and 66. 28 Hz respectively. At the same time the results also indicate that displacement and acceleration response spectrum values increase with the increase of train speed.

关 键 词：轮轨接触 不平顺 功率谱 动力响应 有限元 

分 类 号：U221[交通运输工程—道路与铁道工程]