城市快轨交通钢弹簧浮置板轨道过渡段设计分析  

Design and Analysis on Track Transition Section of Spring-Steel Floating Slab for Urban Fast Rail Transit

作　　者：李斌强 石广田[1,2] 和振兴[1,2] 李鹏浩 贠剑峰 王玉魁 LI Bin-qiang;SHI Guang-tian;HE Zhen-xing;LI Peng-hao;YUN Jian-feng;WANG Yu-kui(School of Mechanical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Key laboratory of Service Environment and Itelligent Operation&Maintenance of Rail Transit in Gansu Province,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学机电工程学院,兰州730070 [2]兰州交通大学甘肃省轨道交通服役环境与智能运维重点实验室,兰州730070

出　　处：《兰州交通大学学报》2022年第4期82-88,127,共8页Journal of Lanzhou Jiaotong University

基　　金：国家自然科学基金(11790280,51868037)。

摘　　要：为了探讨城市快轨交通列车通过钢弹簧浮置板轨道过渡段时车辆-轨道耦合系统的动力响应.以钢轨挠度变化率,车体垂向加速度和轮轨垂向力作为评价指标,基于车辆-轨道耦合动力学理论,建立车辆-普通轨道-过渡段-钢弹簧浮置板系统轨道动力学模型.仿真计算获得钢轨动挠度曲线,钢轨挠度变化率,车体垂向加速度和轮轨垂向力等技术指标.分析不同长度过渡段、不同钢弹簧隔振器加密程度和隔振器刚度级数工况下车辆-轨道系统的动力响应,确定过渡段的长度和钢弹簧浮置板隔振器的布置方式.结果表明:过渡段最少铺设长度为18 m;线性加密和钢弹簧变刚度隔振器过渡方式是最优的解决方法.从80 km/h到160 km/h不同速度条件的列车,通过过渡段的时速越大,钢轨挠度变化率越小,车体垂向加速度越大.In order to investigate the dynamic response of the vehicle-track coupled system when urban fast rail transit trains pass through the transition section of steel-spring floating slab track.Based on the vehicle-track coupled dynamics theory,a rail dynamics model of vehicle-general rail-transition section-spring steel floating slab system is established with the deflection change rate of the rail,vehicle vertical acceleration and wheel-rail vertical force as evaluation indexes.The dynamic deflection curve of rail,deflection change rate of rail,vertical acceleration of vehicle body and wheel-rail vertical force are obtained by simulation.The dynamic response of the vehicle-track system under different transition section lengths,different spring-steel isolator encryption degrees and isolator stiffness levels are analyzed,and the length of the transition section and the arrangement of the spring-steel floating slab isolator are determined.The results show that:the minimum length of the transition section is 18 m;linear encryption and spring-steel variable stiffness vibration isolator transition method is the optimal solution.From 80 km/h to 160 km/h,the greater the speed of the train through the transition section,the smaller the deflection change rate of rail and the greater the vertical acceleration of the vehicle body.

关 键 词：城市轨道交通 钢弹簧浮置板 过渡段 车辆-轨道耦合动力学 

分 类 号：U213.2[交通运输工程—道路与铁道工程]