整治动车组晃车的钢轨打磨实践应用及效果分析  

Effect Analysis and Practical Application of Rail Grinding for Vehicle Wobble of CRH6A EMU

作　　者：张金 曾毅 李晨光 杨光 杜吉康 李剑威 ZHANG Jin;ZENG Yi;LI Chenguang;YANG Guang;DU Jikang;LI Jianwei(Metals and Chemistry Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Department of Maintenance,China Railway Guangzhou Group Co.,Ltd.,Guangzhou Guangdong 510030,China;Guangzhou South High-speed Railway Maintenance Section,China Railway Guangzhou Group Co.,Ltd.,Guangzhou Guangdong 511400,China)

机构地区：[1]中国铁道科学研究院集团有限公司金属及化学研究所,北京100081 [2]中国铁路广州局集团有限公司工务部,广州510030 [3]中国铁路广州局集团有限公司广州南高铁工务段,广州511400

出　　处：《高速铁路新材料》2024年第6期46-52,共7页Advanced Materials of High Speed Railway

基　　金：中国铁道科学研究院集团有限公司基金项目(2023YJ055);中国国家铁路集团有限公司科技研究开发计划项目(K2024G009)。

摘　　要：针对某城际铁路CRH6A型动车组晃车情况,调查分析了动车组晃车原因,开展了钢轨廓形打磨实践应用,并对打磨效果进行了仿真计算和分析评价。结果表明:钢轨廓形存在横向不对称、纵向不一致和周期性交替变化,轮轨接触关系不良是造成CRH6A型动车组晃车的主要原因;打磨后轮轨垂向力、轮轴横向力、轮重减载率的平均值分别降低了约0.14%、64.51%和4.76%,脱轨系数均方根值降低了约22.5%,轮轨磨耗指数平均值、均方根值分别降低了约16.45%、28.03%,改善了轮轨动力响应指标;打磨后构架和车体的横向加速度均方根值分别减小了22.25%和7.33%,改善了车辆动力响应指标。通过开展钢轨打磨实践应用,修正了钢轨轨头廓形,优化了轮轨接触关系,显著提高了动车组运行的安全性和平稳性(横向和垂向车体平稳性指标均小于2.5),成功解决了CRH6A型动车组晃车的问题。For the vehicle wobble situation of CRH6A EMU on a certain intercity railway,the causes were investigated and analyzed,the practical application of rail profile grinding was carried out,and the effect of grinding was simulated and evaluated.The results show as follows:The rail profile has transverse asymmetry,longitudinal inconsistency and periodic alternation.The bad wheel-rail contact relationship is the main reason of CRH6A EMU vehicle wobble.After grinding,the average values of wheel-rail vertical force,wheel-axle lateral force and wheel load reduction rate decreased by about 0.14%,64.51%and 4.76%respectively,the root mean square value of derailment coefficient decreased by about 22.5%,the average values and the root mean square value of wheel-rail wear index decreased by about 16.45%and 28.03%respectively,which improved the dynamic response index of the wheel-rail.After grinding,the root mean square value of transverse acceleration of the frame and the vehicle body are reduced by 22.25%and 7.33%respectively,which improved the dynamic response index of the vehicle.Through the practical application of rail grinding,the rail head profile was corrected,the wheel-rail contact relationship was optimized,and the safety and stability of EMU operation were significantly improved(horizontal and vertical stability indexes were less than 2.5),and the problem of CRH6A EMU vehicle wobble was successfully solved.

关 键 词：城际铁路 CRH6A型动车组 晃车 钢轨打磨 轮轨接触关系 仿真计算 

分 类 号：U216.424[交通运输工程—道路与铁道工程]