Wave propagation characteristics and parameter analysis of the distributed energy absorption system of trains

被引：0
|
作者：
Ding Z. [1 ]
Zheng Z. [1 ]
Yu J. [1 ]
机构：
[1] CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei, 230026, Anhui
来源：
Baozha Yu Chongji/Explosion and Shock Waves | 2019年 / 39卷 / 03期
关键词：
Crushing strength; Distributed energy absorption system; Elastic wave; Optimal design; Plateau stress; Wave propagation characteristics;
D O I：
10.11883/bzycj-2018-0053
中图分类号：
学科分类号：
摘要：
In this study we established a simplified theoretical model of the distributed energy absorption system of trains with the influence of the propagation of elastic waves in the train carriage taken into account. Based on the one-dimensional stress wave theory, the responses of energy absorbers in the collision process were analyzed and the governing equations were obtained and solved. The typical stage and platform response of the velocities on the interfaces of each energy absorber was observed and the mechanism was revealed. The analysis about how to set up and arrange the energy absorbing devices was also carried out. The results show that the crushing strength of the front one should be higher than that of the rear one for the adjacent energy absorbers; otherwise the energy absorber at the rear end cannot work at the same time. The plateau stress and its arrangement of each absorber determine the performance of the energy absorption system, which can thereby determine the duration of the energy absorption and the total energy absorption of each energy absorber. The influence of the plateau stress distribution of the adjacent energy absorbers on the energy absorption performance of the system was analyzed in detail, and the optimal design parameter that maximizes the total energy consumption was obtained. Our study can serve as theoretical guidance for the train's optimization design of the distributed energy absorption system. © 2019, Editorial Staff of EXPLOSION AND SHOCK WAVES. All right reserved.
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