基于轮轨滚动接触稳态特性优选客货列车共线铁路钢轨打磨廓形  

Optimal Selection of Rail Grinding Profile for Passenger-Freight Line Based on Steady State Characteristics of Wheel-Rail Rolling Contact

作　　者：肖乾[1,2] 杨逸航 黄碧坤[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

出　　处：《中国铁道科学》2016年第1期17-23,共7页China Railway Science

基　　金：国家自然科学基金资助项目(51565013);江西省教育厅科学技术研究项目(GJJ14359);西南交通大学牵引动力国家重点实验室开放课题(TPL1407)

摘　　要：基于客、货车车轮镟修踏面和京广线上的3种钢轨打磨廓形,采用mixed Lagrangian/Euler方法建立三维轮轨滚动接触稳态模型,分别计算和分析客、货车车轮镟修踏面与这3种钢轨打磨廓形接触时的轮轨滚动接触稳态特性。结果表明:在轮对对中的情况下,钢轨轨头接触区曲率半径越小,则轮轨接触角越大,且客车的轮轨接触角大于货车的;在不考虑横移的情况下,轮轨接触角在一定范围内变化时,轮轨接触角越大,轮轨接触斑内蠕滑力、蠕滑率的最大值也越大;客、货车镟修踏面与打磨廓形1接触时,接触斑内蠕滑力和蠕滑率的最大值小于其他2种打磨廓形,即打磨廓形1的车辆运行稳定性更好,但轮轨之间的力学性能较差;客、货车镟修踏面与打磨廓形2接触时,接触斑内蠕滑力和蠕滑率的最大值大于其他2种打磨廓形,即打磨廓形2的车辆牵引性能较好,但更容易发生蛇形失稳;客、货车车轮镟修踏面与打磨廓形3接触时,接触斑内蠕滑力和蠕滑率的最大值均介于其他2种打磨廓形之间,可同时保证车辆的牵引性能和运行稳定性,因此打磨廓形3在这3种钢轨打磨廓形中为最优。Based on the re-profiled wheel treads of passenger and freight cars and three kinds of rail grinding profiles on Beijing-Guangzhou line, three-dimensional wheel-rail rolling contact steady-state models were built by mixed Lagrangian/Euler method. The wheel-rail rolling contact steady-state charac- teristics were calculated and analyzed when the re-profiled wheel treads of passenger and freight cars con- tacted with three kinds of rail grinding profiles respectively. The results show that, under the condition of wheelset alignment, the smaller is the curvature radius of rail head contact area, the greater is wheel-rail contact angle, and the wheel-rail contact angle of passenger car is greater than that of freight car. Without considering lateral displacement, when wheel-rail contact angle changes within a certain range, the greater is the wheel-rail contact angle, the greater are the maximum values of the creep force and creepage in wheel-rail contact patch. When the re-profiled wheel treads of passenger and freight cars contact with rail grinding profile 1, the maximum values of creep force and creepage in contact patch are less than the other two kinds of rail grinding profiles, i. e. , the running stability of rail grinding profile 1 is better, hut the mechanical properties between wheel and rail are poorer. When the re-profileal wheel treads of passenger and freight cars contact with rail grinding profile 2, the maximum values of creep force and creepage in contact patch are greater than the other two kinds of rail grinding profiles, i. e. , the traction performance of rail grinding profile 2 is better, but the hunting instability is more likely to occur. When the re-profiled wheel treads of passenger and freight cars contact with rail grinding profile 3, the maximum values of both the creep force and creepage in contact patch are between those of the other two rail grinding profiles, which can ensure the traction performance and running stability at the same time. Therefore, grinding profile 3 is the best am

关 键 词：客货列车共线铁路 轮轨蠕滑 轮轨滚动接触 钢轨打磨廓形 车轮镟修踏面 

分 类 号：U213.4[交通运输工程—道路与铁道工程]