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Vertical Track Irregularity Influence on the Wheel High-Frequency Vibration in Wheel-Rail System

机译：轮轨系统中垂直轨道不平顺对车轮高频振动的影响

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摘要

A three-dimensional deformable finite element model of wheel-rail system is established. The vertical vibration natural frequencies are calculated by modal analysis. The improved central difference method by ABAQUS explicit nonlinear dynamics module is chosen to calculate the vertical vibration of wheel axle. Through the vibration measurement experiment of LMA wheel by China Academy of Railway Sciences, the contact parameter is optimized and the model is modified. According to the nonlinear simulation results, the important influence of vertical track irregularity on the wheel set high-frequency vibration is discovered. The advantage frequencies through spectrum are close to the vertical vibration natural frequencies of seventh, eighth, ninth, and tenth mode. When the velocity is 350 km/h, system's nonlinear dynamic characteristic is higher than the results at 200 km/h. The critical wavelength of vertical track irregularity on the wheel vertical vibration is about 0.8 m. In addition, a particular attention should be paid to one situation that the main dominant frequency amplitude is more than 50% of the acceleration amplitude even if the peak acceleration is low.
机译：建立了轮轨系统的三维可变形有限元模型。垂直振动固有频率通过模态分析计算。选择了ABAQUS显式非线性动力学模块改进的中心差法，计算了轮轴的垂直振动。通过中国铁道科学研究院LMA车轮的振动测量实验，优化了接触参数，并对模型进行了修改。根据非线性仿真结果，发现垂直轨迹不平整对轮对高频振动的重要影响。频谱上的优势频率接近于第七，第八，第九和第十模式的垂直振动固有频率。当速度为350 km / h时，系统的非线性动力学特性高于200 km / h时的结果。车轮垂直振动的垂直轨迹不规则性的临界波长约为0.8 m。此外，即使峰值加速度较低，也应特别注意一种情况，即主主频率幅度大于加速度幅度的50％。

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  • 来源
    《Mathematical Problems in Engineering》 |2016年第9期|5082319.1-5082319.13|共13页
  • 作者

    Lei Yang; Tian Xinyu; Qi Falin; Chen Dongsheng; Tian Tian;

  • 作者单位

    China Acad Railway Sci, Beijing 100081, Peoples R China;

    China Acad Railway Sci, Beijing 100081, Peoples R China;

    China Acad Railway Sci, Beijing 100081, Peoples R China;

    China Acad Railway Sci, Beijing 100081, Peoples R China;

    China Acad Railway Sci, Beijing 100081, Peoples R China;

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