轴向变厚度星形管吸能特征及多目标优化研究

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摘要提出了一种新型的轴向变厚度星形管，采用Abaqus/Explicit对该结构有限元建模，并验证了模型的精度。系统研究了该结构在轴向冲击下的变形模式、力-位移和能量吸收等耐撞性能并分析了其关键耐撞性指标，开展了不同角数星形管在保持相同质量下的耐撞性能研究，采用多目标优化方法开展了星形管的优化研究。结果表明，所提出的轴向变厚度星形管相比常规的等壁厚星形管在降低初始峰值载荷和提升结构冲击载荷效率方面具有很大优势，多目标优化得到的最优设计相比原始设计的耐撞性能得到了有效改善，比能量吸收最大提升了6.02%，初始峰值载荷最高减少了39.56%。该研究能为轴向变厚度吸能结构设计提供参考。

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	邓小林1
	黄家乐2
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关键词 ：轴向变厚度, 星形管, 轴向冲击, 耐撞性, 多目标优化

Abstract：A new type of axially variable thickness star-shaped tube is proposed. Abaqus/Explicit is used to construct the finite element model of the structure, and the accuracy of the finite element model is 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 is 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 structure.

Key words： axially variable thickness star-shaped tube axial impact crashworthiness multi-objective optimization

收稿日期: 2020-12-18 出版日期: 2022-04-28

引用本文:

邓小林1，黄家乐2，3. 轴向变厚度星形管吸能特征及多目标优化研究[J]. 振动与冲击, 2022, 41(8): 287-296.
DENG Xiaolin1, HUANG Jiale2, 3. A study on energy absorption characteristics and multi-objective optimization of an axial variable thickness star-shaped tube. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(8): 287-296.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2022/V41/I8/287

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