高速铁路钢轨波磨对弹条疲劳寿命的影响  

Influence of Rail Corrugation on the Fatigue Life of Fastener Clips in High Speed Railway

作　　者：林川淇 陈帅 吴磊[3] 侯选一 赵国堂[2,5] 王衡禹 LIN Chuanqi;CHEN Shuai;WU Lei;HOU Xuanyi;ZHAO Guotang;WANG Hengyu(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China;Public Transportation Office,Qingdao Transportation Development Center,Qingdao Shangdong 266061,China;CHINA RAILWAY,Beijing 100844,China)

机构地区：[1]西南交通大学牵引动力国家重点实验室,成都610031 [2]西南交通大学土木工程学院,成都610031 [3]西南交通大学机械工程学院,成都610031 [4]青岛市运输事业发展中心公共交通处,山东青岛266061 [5]中国国家铁路集团有限公司,北京100844

出　　处：《铁道建筑》2023年第2期12-16,共5页Railway Engineering

基　　金：国家自然科学基金(51775454);四川省区域创新合作项目(2020YFQ0024)。

摘　　要：为研究高速铁路钢轨波磨对扣件弹条寿命的影响,建立了车辆-轨道耦合动力学模型、扣件弹条瞬态有限元模型、扣件弹条疲劳寿命预测模型,仿真计算了列车高速通过波磨波长60~160 mm、波深20~160μm的钢轨波磨区段时扣件弹条的动态响应及疲劳寿命。结果表明:列车通过波磨钢轨时,钢轨对扣件的作用力及钢轨垂向位移变化曲线均发生明显的高频波动,其波动频率与钢轨波磨引起的激励频率一致,导致弹条动应力大幅增加;当波磨波深相同、波长在80 mm和130 mm时,波磨通过频率与扣件弹条固有频率接近,从而产生共振,导致扣件弹条动应力明显增大而疲劳寿命明显降低;同一波长下,随着波磨波深增加,扣件弹条动态响应加剧,疲劳寿命大幅降低。In order to study the influence of rail corrugation on the life of the fastener clip in high speed railway,the vehicle-track coupling dynamics model,the transient finite element model of the fastener clip,and the fatigue life prediction model of the fastener clip were established.Dynamic response and fatigue life of fastener clip was simulated and calculated when the train passes the rail corrugation section with corrugation wavelengths of 60~160 mm and wave depth of 20~160μm.The results show that when the train passes the corrugation rail,the force of the rail on the fastener and the vertical displacement curve of the rail have obvious high-frequency fluctuations,and the fluctuation frequency is consistent with the excitation frequency caused by the corrugation of the rail,resulting in a significant increase in the dynamic stress of the fastener clip.When the wave depth of corrugation is the same and the wavelength is 80 mm and 130 mm,the passing frequency of corrugation is close to the natural frequency of the fastener clip,resulting in resonance,which leads to a significant increase in the dynamic stress of the fastener clip and a significant decrease in the fatigue life.At the same wavelength,with the increase of the depth of the corrugation,the dynamic response of the elastic strip of the fastener increases,and the fatigue life decreases significantly.

关 键 词：高速铁路 疲劳寿命 有限元模型 扣件弹条 钢轨波磨 车辆-轨道耦合动力学 共振 

分 类 号：U213.53[交通运输工程—道路与铁道工程]