A study on energy absorption characteristics and multi-objective optimization of an axial variable thickness star-shaped tube

被引：0
|
作者：
Deng X. [1 ]
Huang J. [2 ,3 ]
机构：
[1] School of Electronics and Information Engineering, Wuzhou University, Wuzhou
[2] School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou
[3] Department of Mechanical and Electrical Engineering, Xiamen University, Xiamen
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2022年 / 41卷 / 08期
关键词：
Axial impact; Axially variable thickness; Crashworthiness; Multi-objective optimization; Star-shaped tube;
D O I：
10.13465/j.cnki.jvs.2022.08.035
中图分类号：
学科分类号：
摘要：
A new type of axially variable thickness star-shaped tube was proposed. ABAQUS/Explicit was used to construct the finite element model of the structure, and the accuracy of the finite element model was verified. The structure's crashworthiness such as deformation mode, force-displacement, and energy absorption under axial impact was systematically studied, and its key crashworthiness indexes were analyzed. The crashworthiness of star-shaped tubes with different corners under the same mass was studied. The optimization study of the star-shaped tube was carried out. The results show that the proposed axial variable thickness star-shaped tube has great advantages in reducing the initial peak force and improving the crush force efficiency compared with the star-shaped tube of constant wall thickness. Compared with the original design, the optimal design obtained by multi-objective optimization has effectively improved the crashworthiness, the specific energy absorption is increased by 6.02%, and the initial peak force is reduced by 39.56%. This research can provide reference for the design of axially variable thickness energy absorbing structures. © 2022, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：287 / 296
页数：9
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