Vertical Coupling Dynamic Analysis Method and Engineering Application of Vehicle-Track-Substructure Based on Forced Vibration

被引：0
|
作者：
Gao M. [1 ]
Li G. [1 ]
Yang F. [1 ]
Yang J. [1 ]
Zhao W. [1 ]
You M. [1 ]
机构：
[1] Infrastructure Inspection Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing
来源：
Zhongguo Tiedao Kexue/China Railway Science | 2021年 / 42卷 / 02期
关键词：
Coupling dynamic analysis; Failure; Fastener; Forced vibration; Vehicle-track-substructure; Vibration response;
D O I：
10.3969/j.issn.1001-4632.2021.02.06
中图分类号：
学科分类号：
摘要：
The track and substructure are decomposed into rail subsystem and substructure subsystem, in which the rail subsystem is composed of two layers of nodes corresponding to the upper rail and the lower fastener. The rail is treated as a continuous beam with elastic discrete point supports, and spring-damping elements are used to simulate the constraints between rail and fastener. Forced displacement and forced velocity are used to deal with the effect of the substructure on the rail system, while the external load is used to deal with the reverse effect. The vertical coupling dynamic analysis method of vehicle-track-substructure based on forced vibration is built to analyze the influence on the dynamic response of track and vehicle caused by local fastener failure. Results show that the dynamic characteristics of the infrastructure with local diseases can be accurately calculated by using the proposed method. Local fastener failure will slightly affect the vibration of substructure and carbody, but it will significantly intensify the vibration response between wheel and rail. The maximum vertical displacement and the maximum vertical vibration acceleration of rail is 2.94 times and 2.97 times the normal value respectively under the train speed of 350 km • h-1. At the same time, the maximum wheel-rail force and wheel load reduction rate increase by 22.0% and 50.2% respectively from the normal value. © 2021, Editorial Department of China Railway Science. All right reserved.
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页码：50 / 58
页数：8
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