4.0 Article

A rigid-flexible coupling finite element model of coupler for analyzing train instability behavior during collision

期刊

RAILWAY ENGINEERING SCIENCE
卷 -, 期 -, 页码 -

出版社

SPRINGER
DOI: 10.1007/s40534-023-00308-2

关键词

Intermediate coupler; Rigid-flexible coupling finite element model; Design buckling load; Actual buckling load; Lateral buckling instability

向作者/读者索取更多资源

Rail vehicles generate enormous longitudinal impact loads during collisions, and if there is a mismatch between the compressive strength of the intermediate coupler and the structural strength of the car body, the risk of car body damage and train derailment increases. In this study, a four-stage rigid-flexible coupling finite element model of the coupler is established, taking into account the coupler buckling load. The influence of the coupler buckling load on the train's longitudinal-vertical-horizontal buckling behavior is investigated, and the mechanism of horizontal buckling instability in train collisions is revealed.
Rail vehicles generate huge longitudinal impact loads in collisions. If unreasonable matching exists between the compressive strength of the intermediate coupler and the structural strength of the car body, the risk of car body structure damage and train derailment will increase. Herein, a four-stage rigid-flexible coupling finite element model of the coupler is established considering the coupler buckling load. The influence of the coupler buckling load on the train longitudinal-vertical-horizontal buckling behavior was studied, and the mechanism of the train horizontal buckling instability in train collisions was revealed. Analysis results show that an intermediate coupler should be designed to ensure that the actual buckling load is less than the compressive load when the car body structure begins to deform plastically. The actual buckling load of the coupler and the asymmetry of the structural strength of the car body in the lateral direction are two important influencing factors for the lateral buckling of a train collision. If the strength of the two sides of the car body structure in the lateral direction is asymmetrical, the deformation on the weaker side will be larger, and the end of the car body will begin to deflect under the action of the coupler force, which in turn causes the train to undergo sawtooth buckling.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.0
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据