轮对横移对高速轮轨稳态滚动接触蠕滑力和蠕滑率的影响  

Effects of the Lateral Displacement of Wheelset on the Creep Force and Creepage of High-Speed Wheel-Rail Steady-State Rolling Contact

作　　者：肖乾[1,2] 徐红霞[3] 黄碧坤[1] 张海[1] 

机构地区：[1]华东交通大学现代轨道车辆研究所,江西南昌330013 [2]西南交通大学牵引动力国家重点实验室,四川成都610031 [3]江铃汽车股份有限公司,江西南昌330013

出　　处：《中国铁道科学》2014年第4期88-93,共6页China Railway Science

基　　金：国家自然科学基金项目(51005075);江西省教育厅科学技术研究项目(GJJ14359)

摘　　要：运用有限元软件ABAQUS的非线性功能,基于轮轨滚动接触理论,采用mixed Lagrangian/Eulerian方法建立高速轮轨稳态滚动接触的大规模有限元模型,分析CRH2型动车组在CHN60钢轨直线线路上运行且其轮对横移量在0～6 mm范围变化时的蠕滑力和蠕滑率.结果表明：随着轮对横移量的增大,车轮接触斑内纵向蠕滑力合力的最大值约为最小值的24.4倍,列车总的纵向蠕滑力几乎是呈线性急剧减小,表明轮对横移量的增大会降低列车的牵引性能;横向蠕滑力合力的最大值与最小值相差约42.4％,变化趋势低于纵向蠕滑力合力,列车左轮与右轮总的横向蠕滑力随着轮对横移量的增大而减小,从而影响列车的横向稳定性与脱轨系数;纵向蠕滑率的最大值与最小值相差约124.8％;与纵向蠕滑率相比,横向蠕滑率很小且几乎不随轮对横移发生变化,表明轮对横移对横向蠕滑率的影响很小.On the basis of wheel-rail rolling contact theory and by using the method of mixed Lagrangian/Eulerian with nonlinear finite element software ABAQUS,the large-scale finite element model of wheelrail steady-state rolling contact was established.The creep force and creepage of CRH2 EMU running on CHN60 rail straight line with the lateral displacement of wheelset ranging from 0 to 6 mm were analyzed.Results show that,the maximum resultant force of the longitudinal creep force within wheel contact patch is 24.4 times of the minimum value with the increase of wheelset lateral displacement.The total longitudinal creep force of train decreases rapidly and almost linearly,which indicates that the traction performance of train will be reduced with the increase of wheelset lateral displacement.The difference between the maximum and minimum resultant force of lateral creep force is about 42.4％,and the change is lower than that of the resultant force of longitudinal creep force.The total lateral creep force of left wheel and right wheel of train decreases with the increase of wheelset lateral displacement,accordingly,both the lateral stability and derailment coefficient of train are affected.The difference between the maximum and minimum longitudinal creepage is 124.8％.Comparing with the longitudinal creepage,the value of lateral creepage is very small and hardly changes with the lateral displacement of wheelset,so the lateral displacement has little effect on the lateral creepage.

关 键 词：轮对横移 高速轮轨关系 轮轨稳态滚动接触 蠕滑力 蠕滑率 

分 类 号：U260.11[机械工程—车辆工程] U270.11[交通运输工程—载运工具运用工程]