不同轮轨冲角下高速轮轨稳态滚动接触的蠕滑特性  

Creep Characteristics of High-Speed Wheel-Rail Steady-State Rolling Contact under Different Attack Angles

作　　者：肖乾[1] 徐红霞[1] 成棣[2] 张海[1,2] 

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]中国铁道科学研究院铁道科学技术研究发展中心,北京100081

出　　处：《中国铁道科学》2014年第1期60-66,共7页China Railway Science

基　　金：国家自然科学基金资助项目(51005075);江西省教育厅科学技术研究项目(GJJ12292)

摘　　要：在分析轮轨接触蠕滑机理的基础上,利用有限元软件ABAQUS,采用mixed Lagrangian/Eulerian方法建立三维轮轨稳态滚动接触模型,研究直线线路上轮轨冲角对高速列车轮轨滚动接触面间蠕滑力和蠕滑率的影响。结果表明:车轮接触斑内的纵向蠕滑力随着轮轨冲角的增大而逐渐减小,其最大值与最小值相差约9.67%,因此轮轨冲角的增大会降低列车的牵引性能;横向蠕滑力随着轮轨冲角的增大而增大,轮轨冲角为6mrad时的横向蠕滑力是其为0mrad时的7.3倍左右;在横向蠕滑力和纵向蠕滑力的相互作用下接触斑内存在小自旋蠕滑;轮轨冲角对纵向蠕滑率几乎没有影响,但对横向蠕滑率有较大的影响,不同冲角时最大横向蠕滑率值相差约16.5%。On the basis of analyzing wheel-rail contact creep mechanism,the finite element software ABAQUS was used to establish three-dimensional wheel-rail steady-state rolling contact model with the method of mixed Lagrangian/Eulerian.The effects of attack angles on the creep forces and creepages between wheel-rail rolling contact surfaces of high-speed train on straight lines were investigated.The results show that the longitudinal creep force gets smaller and smaller with the increase of attack angle within wheel contact patch.The difference between its maximum and minimum is about 9.67％,so the increase of attack angle will decrease train traction performance.The lateral creep force gets bigger and bigger with the increase of attack angle,and when the attack angle is 6 mrad,it is about 7.3 times of that when the attack angle is 0 mrad.Small spin creep will be formed in contact patch under the interactions of lateral and longitudinal creep forces.The attack angle has almost no effects on longitudinal creepage but greater effects on lateral creepage.The difference between the maximum lateral creepages under different attack angles is about 16.5％.

关 键 词：高速轮轨关系 轮轨冲角 稳态滚动接触 蠕滑特性 蠕滑力 蠕滑率 

分 类 号：U260.11[机械工程—车辆工程] U211.5[交通运输工程—载运工具运用工程]