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准静态轴向压缩下双向波纹管的耐撞性性能及多目标优化

Crashworthiness Performance and Multi-Objective Optimization of Bi-Directional Corrugated Tubes under Quasi-Static Axial Crushing.

作者信息

Zou Liuxiao, Wang Xin, Wang Ruojun, Huang Xin, Li Menglei, Li Shuai, Jiang Zengyan, Yin Weilong

机构信息

Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China.

Department of Engineering Mechanics, Kunming University of Science and Technology, Kunming 650031, China.

出版信息

Materials (Basel). 2024 Aug 9;17(16):3958. doi: 10.3390/ma17163958.

DOI:10.3390/ma17163958
PMID:39203135
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11355867/
Abstract

Longitudinal corrugated tubes (LCTs) exhibit stable platform force under axial compression but have low specific energy absorption. Conversely, circumferential corrugated tubes (CCTs) offer higher specific energy absorption but with unstable platform force. To overcome these limitations, this paper introduces a novel bi-directional corrugated tube (BCT) that amalgamates the strengths of both the CCT and LCT while mitigating their weaknesses. The BCT is formed by rolling a bi-directional corrugated structure into a circular tubular form. Numerical simulations of the BCT closely align with experimental results. The study further examines the influence of discrete parameters on the BCT's performance through simulations and identifies the tube's optimal design using the integral entropy TOPSIS method. A full factorial experimental approach is then employed to investigate the impact of radial amplitude, axial amplitude, and neutral surface diameter on the crushing behavior of the BCT, comparing it with the CCT and LCT. The results reveal that increasing Ai enhances the axial resistance of the structure, while increasing Aj reduces the buckling effect, resulting in a higher specific energy absorption and lower ultimate load capacity for the BCT compared to the CCT and LCT. A simultaneous multi-objective optimization of the CCT, LCT, and BCT confirms that the BCT offers superior specific energy absorption and ultimate load capacity. The optimal configuration parameters for the BCT have been determined, providing significant insights for practical applications in crashworthiness engineering.

摘要

纵向波纹管（LCTs）在轴向压缩下表现出稳定的平台力，但比能量吸收较低。相反，周向波纹管（CCTs）具有较高的比能量吸收，但平台力不稳定。为了克服这些局限性，本文介绍了一种新型的双向波纹管（BCT），它融合了CCT和LCT的优点，同时减轻了它们的缺点。BCT是通过将双向波纹结构卷成圆形管状而形成的。BCT的数值模拟与实验结果密切吻合。该研究通过模拟进一步考察了离散参数对BCT性能的影响，并使用积分熵TOPSIS方法确定了该管的最优设计。然后采用全因子实验方法研究径向振幅、轴向振幅和中性面直径对BCT压缩行为的影响，并将其与CCT和LCT进行比较。结果表明，增加Ai可提高结构的轴向阻力，增加Aj可降低屈曲效应，与CCT和LCT相比，BCT具有更高的比能量吸收和更低的极限承载能力。对CCT、LCT和BCT进行同步多目标优化，证实BCT具有优异的比能量吸收和极限承载能力。已确定了BCT的最佳配置参数，为防撞工程的实际应用提供了重要的见解。

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