Nonlinear three-dimensional wagon–track model for the investigation of rail corrugation initiation on curved track
Nonlinear three-dimensional wagon–track model for the investigation of rail corrugation initiation on curved track
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DOI：
10.1080/00423110600863407
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发表时间：
2007-02
影响因子：
3.6
通讯作者：
Y. Sun;S. Simson
中科院分区：
文献类型：
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作者：
Y. Sun;S. Simson
建立了弯曲轨道上的非线性车轨模型，以表征轮轨粘滑过程自激引起的轨道波纹。在这个模型中，货车运动被描述为使用高达78个自由度（DOFs）来模拟一个三件套货运转向架。创新之处在于，轮对运动用九个自由度来描述，包括纵向和垂直方向的扭转和弯曲模式。轨道建模被认为是一个单层结构（两个轨道梁在离散的弹簧和阻尼元件上）。在轮轨界面建模中考虑了蠕滑饱和后的车轮滑动。仿真结果表明，车轮粘滑过程的频率由过枕木频率和轮对三分之一扭弯组合频率的共同作用产生的基本频率，以及在不同情况下形成钢轨波纹波长的两倍和三倍基本频率组成。
A nonlinear wagon–track model on curved track has been developed to characterize rail corrugation formation due to self-excitation of the wheel–rail stick–slip process. In this model, wagon movements were described using up to 78 degrees of freedom (DOFs) to model a three-piece freight bogie. Innovatively, the wheelset movements are described using nine DOFs, including torsional and bending modes about the longitudinal and vertical directions. The track modelling is considered as a one-layer structure (two rail beams on discrete spring and damper elements). The wheel sliding after creepage saturation is considered in the wheel–rail interface modelling. Simulation of a case study shows that the frequencies of the wheel stick–slip process are composed of the basic frequency, which might come from the combined effect of sleeper-passing frequency and one-third of the combined torsional and bending frequency of the wheelset, and the double and triple basic frequencies, which form the wavelengths of rail corrugation at different situations.