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Estimation of Rail Axial Force in High-Speed Railway Ballastless Track Based on Wave Modes

机译：基于波模式的高速铁路碴轨道轨轴力估计

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摘要

To estimate the rail axial force of high-speed railway ballastless track, the reasonable index without complex measuring or error correction process is proposed. Taking the ballastless track structure in high-speed railway as the research object, the wave motion of periodic ballastless track is studied using the wave finite element method. It is found that some standing wave modes are linearly correlated with the rail axial force and thus can be considered as the basic indices for rail axial force estimation. A further in situ experiment according to the modal test method is performed and the feasibility of different wave modes for estimating rail axial force is discussed. Experiment results show that the lateral wave mode coincides well with the theoretical result while there is a large difference for the vertical wave mode. To explicate the difference, the temperature-dependent properties of the fastening are tested additionally. Parametric analysis shows that the frequency shift of vertical wave mode is greatly affected by the fastening temperature-dependent characteristics including the rail pad, elastic pad, and fastener clamping force, while the frequency shift of lateral wave mode is mainly determined by the rail axial force.
机译：为了估算高速铁路禁止轨道的轨道轴向力，提出了无需复杂测量或纠错过程的合理指数。在高速铁路中采用禁区轨道结构作为研究对象，使用波有限元法研究了周期性碴轨道的波动。发现一些驻波模式与轨轴力线性相关，因此可以被认为是轨道轴力估计的基本指标。讨论了根据模态测试方法的进一步原位实验，并讨论了用于估计轨道力的不同波动模式的可行性。实验结果表明，横向波模式与理论结果相互作合，而垂直波模式差异很大。为了突出差异，还在测试紧固的温度依赖性。参数分析表明，垂直波模式的频率偏移受到轨道焊盘，弹性垫和紧固件夹紧力的紧固温度依赖性特性的大大影响，而横向波模式的频移主要由轨道轴向力决定。

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  • 来源
    《Mathematical Problems in Engineering》 |2019年第16期|4329830.1-4329830.11|共11页
  • 作者

    Yi Qiang; Zhao Cai-you; Wang Ping; Gao Xin; Wang Liu-cong; Ke Wen-hua;

  • 作者单位

    Southwest Jiaotong Univ Key Lab High Speed Railway Engn Minist Educ Chengdu 610031 Sichuan Peoples R China|Southwest Jiaotong Univ Sch Civil Engn Chengdu 610031 Sichuan Peoples R China;

    Southwest Jiaotong Univ Key Lab High Speed Railway Engn Minist Educ Chengdu 610031 Sichuan Peoples R China|Southwest Jiaotong Univ Sch Civil Engn Chengdu 610031 Sichuan Peoples R China;

    Southwest Jiaotong Univ Key Lab High Speed Railway Engn Minist Educ Chengdu 610031 Sichuan Peoples R China|Southwest Jiaotong Univ Sch Civil Engn Chengdu 610031 Sichuan Peoples R China;

    Southwest Jiaotong Univ Key Lab High Speed Railway Engn Minist Educ Chengdu 610031 Sichuan Peoples R China|Southwest Jiaotong Univ Sch Civil Engn Chengdu 610031 Sichuan Peoples R China;

    Southwest Jiaotong Univ Key Lab High Speed Railway Engn Minist Educ Chengdu 610031 Sichuan Peoples R China|Southwest Jiaotong Univ Sch Civil Engn Chengdu 610031 Sichuan Peoples R China;

    Southwest Jiaotong Univ Key Lab High Speed Railway Engn Minist Educ Chengdu 610031 Sichuan Peoples R China|Southwest Jiaotong Univ Sch Civil Engn Chengdu 610031 Sichuan Peoples R China;

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