Three-Dimensional Vehicle-Curved Track Dynamic Model Based on FEM and DEM

被引：2
|
作者：
Chen, Xianmai [1 ]
Pan, Liu [1 ]
Xu, Lei [1 ]
Shi, Can [2 ]
机构：
[1] Cent South Univ, Sch Civil Engn, Changsha 410074, Hunan, Peoples R China
[2] Southwest Jiaotong Univ, State Key Lab Tract Power, Chengdu 610031, Peoples R China
来源：
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS | 2021年 / 21卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Vehicle-curved track dynamic interaction; curved tracks; ballast nonlinearity; iterative solution; discrete element method; RAILWAY TRACK; BALLAST; STABILITY;
D O I：
10.1142/S0219455421501790
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this work, a systematic vehicle-curved track dynamic model is presented, in which the vehicle is modeled as a multi-rigid-body system. The track structure is modeled by finite element method with curved rail beam element considered in geometry. To obtain accurate dynamic behavior of railway ballasted track, the resistance characteristics of ballast bed are revealed by introducing the discrete element method. Besides, a two-step iterative-update method is improved to solve the multi-nonlinearity of the vehicle-curved track dynamic interaction. To improve the computational efficiency, and the improved infinite cyclic calculation method is introduced. Apart from the model validations, the application of this model in engineering practices, such as the vehicle-induced vibration of the continuously welded rail (CWR), has been revealed, and some conclusions are drawn from the numerical studies.
引用
收藏
页数：27
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