A Detailed Model for Investigating Vertical Interaction between Railway Vehicle and Track
A Detailed Model for Investigating Vertical Interaction between Railway Vehicle and Track
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DOI：
10.1080/00423119308969544
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发表时间：
2021-07
期刊：
影响因子：
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通讯作者：
W. Zhai;Xiang Sun
中科院分区：
文献类型：
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作者：
W. Zhai;Xiang Sun
摘要 开发了一个新的详细模型来研究铁路车辆和轨道之间的垂直相互作用。该模型由车辆和轨道两个子系统组成，其中车辆子系统被建模为在轨道上匀速运行的10自由度多体系统，轨道下部结构为无限欧拉梁，支撑在由钢轨、枕木和道碴三层组成的离散连续弹性基础上。这两个子系统之间的接口是赫兹非线性弹性接触理论描述的轮轨相互作用。为了获得如此复杂系统的数值结果，采用了一种新的简单快速积分方法。并将典型数值结果与现场实测数据进行比较，以验证详细模型。最后，将该模型应用于分析高速铁路和重载铁路的轮轨动态相互作用。
SUMMARY A new detailed model is developed to investigate the vertical interactions between railway vehicles and tracks. The model consists of two subsystems of vehicle and track in which the vehicle subsystem is modelled as a multi-body system with 10 DOFs running on the track with a constant velocity, and the track substructure as an infinite Euler beam supported on a discrete-continuous elastic foundation consisting of the three layers of rail, sleeper, and ballast. The interface between these two subsystems is the wheel / rail interaction described by Hertzian nonlinear elastic contact theory. In order to get numerical results of such a complex system, a new simple fast integration method is adopted. And typical numerical results are compared with field measured data to verify the detailed model. Finally, the model is applied to analysing the wheel / rail dynamic interactions in high-speed rail and in heavy haul railway.