地铁直线轨道钢轨波磨影响参数研究  

Study on Influence Parameters of Rail Corrugation on Tangential Tracks of Metro

作　　者：王志强 雷震宇 WANG Zhiqiang;LEI Zhenyu(Institute of Rail Transit, Tongji University, Shanghai, 201804;Shanghai Key Laboratory of Rail Infrastructure Durability and System Safety, Shanghai, 201804)

机构地区：[1]同济大学铁道与城市轨道交通研究院,上海201804 [2]上海市轨道交通结构耐久与系统安全重点实验室,上海201804

出　　处：《中国机械工程》2021年第4期420-430,共11页China Mechanical Engineering

基　　金：国家自然科学基金(11772230)。

摘　　要：基于车辆轨道耦合动力学模型和钢轨材料摩擦磨损计算模型,分析了不同轨道结构参数和车辆运营速度对地铁直线轨道钢轨波磨发生和发展的影响。结果发现,对于不同的变量参数,轮轨接触斑内摩擦功率随时间的变化都具有一定的波动性,且摩擦功率整体波动幅度较为均匀。同时,摩擦功率1/3倍频程图分析结果表明,摩擦功率的特征频率主要集中在中低频范围。在主要特征频率处,扣件纵向刚度、纵向阻尼、横向阻尼和垂向阻尼对钢轨波磨的影响较小,扣件横向刚度、垂向刚度、扣件间距、轮轨摩擦因数和车辆运行速度对钢轨波磨的影响较大。扣件垂向刚度和扣件间距的变化会导致摩擦功率的特征频率发生偏移,主要特征频率从80 Hz偏移至100 Hz,从而导致对应波长的钢轨波磨,说明扣件垂向刚度和扣件间距对特定频率处钢轨波磨的产生和发展具有重要的影响。其余变量的增大并未导致摩擦功率的特征频率发生改变,表明其余变量不影响钢轨波磨的特征频率。The influences of different track structure parameters and the vehicle operation speeds on the generation and development of rail corrugation on the tangential tracks of metro were analyzed based on the vehicle-track coupled dynamics model and the rail material friction and wear calculation model.The results show that,for different variable parameters,the friction power in wheel-rail contact patch fluctuates with time,and the overall fluctuation range of friction power is relatively uniform.At the same time,the analysis results of one-third octave curves of friction power show that the characteristic frequencies of friction power are mainly concentrated in the middle and low frequency ranges.At the main characteristic frequency,the longitudinal stiffness of fasteners,the longitudinal damping of fasteners,the transverse damping of fasteners and the vertical damping of fasteners have less influence on rail corrugation,while the transverse stiffness of fasteners,the vertical stiffness of fasteners,the spacing of fasteners,the wheel-rail friction coefficient and the running speed of vehicles have greater influence on rail corrugation.Changes in the vertical stiffness and spacing of fasteners will cause the characteristic frequency of friction power to be offset(the main characteristic frequency is shifted from 80Hz to 100Hz),which will lead to rail corrugation of corresponding wavelength,indicating that the vertical stiffness and spacing of fasteners have an important impact on the generation and development of rail corrugation at the specific frequency.The increase of other variables does not change the characteristic frequency of friction power,indicating that the other variables do not affect the characteristic frequency of rail corrugation.

关 键 词：轨道工程 钢轨波磨 车辆轨道耦合动力学 摩擦功率 特征频率 

分 类 号：U213.42[交通运输工程—道路与铁道工程]