地震荷载作用下轮轨系统振动特性分析  

Analysis of Vibration Characteristics of Wheel/rail System under Earthquake Load

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4期28-30,共3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地震荷载激励下的动力响应,根据振动力学和有限元理论,利用ANAYS结构分析软件,建立三维轮轨系统接触的有限元模型,模型中考虑轮轨之间的实际接触状态,计算在地震荷载激励下的轮轨系统的振动特性。结果表明:地震荷载下轮轨接触应力是静力时的1.8倍,并且轮轨出现短暂的分离,接触区域的等效Mises应力有不同程度增大,车体加速度超出限值14.3%。In order to analyze the dynamic responses of wheel/rail system under earthquake load, a three-dimensional finite element model of wheel/rail system is established with ANSYS based on vibration mechanics and finite element theory. The model addresses the real contact condition between wheel and rail and the vibration characteristics of wheel/rail system under earthquake load are calculated. The results show that the contact stress is 1. 8 times of the static, the wheel and the rail experience a brief separation, the Mises equivalent stress in contact region increases in different extents, and the acceleration of train body exceeds the limit of 14. 3%.

关 键 词：轮轨接触 动力响应 接触应力 有限元 

分 类 号：U260.111[机械工程—车辆工程]