复合材料科学与工程 ›› 2024, Vol. 0 ›› Issue (2): 102-108.DOI: 10.19936/j.cnki.2096-8000.20240228.015

• 应用研究 • 上一篇    下一篇

复合材料折纸管吸能特性多目标优化设计

周政言1, 李响1*, 朱璐2, 孙烨培1   

  1. 1.北京理工大学 宇航学院,北京 100081;
    2.上海宇航系统工程研究所,上海 201108
  • 收稿日期:2023-01-13 出版日期:2024-02-28 发布日期:2024-04-22
  • 通讯作者: 李响(1972—),男,博士,副教授,博士生导师,研究方向为飞行器总体设计,lx1106@bit.edu.cn。
  • 作者简介:周政言(1998—),男,硕士,研究方向为复合材料多优化设计。

Multi-objective optimization design of energy absorption characteristics of composite origami tubes

ZHOU Zhengyan1, LI Xiang1*, ZHU Lu2, SUN Yepei1   

  1. 1. School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China;
    2. Shanghai Institute of Aerospace Systems Engineering, Shanghai 201108, China
  • Received:2023-01-13 Online:2024-02-28 Published:2024-04-22

摘要: 薄壁结构被广泛用于吸能装置中,传统直管碳纤维树脂基增强复合材料(CFRP)薄壁结构在受到压溃时总是表现出峰值力过高以及力-位移曲线波动较大的问题,然而吸能装置必须保证渐进和受控的能量吸收,避免可能过大的峰值力,因此CFRP薄壁管结构作为吸能装置还需进一步改进设计。与传统直管结构相比,CFRP折纸管由于其独特的结构形式有更好的吸能特性。通过数值模拟研究了折纸管在轴向载荷作用下的能量吸收特性,得到了管件吸能特性指标与其几何参数之间的非线性映射关系。建立起考虑最大化总吸能和最小化峰值力的多目标结构优化设计模型,采用NSGA-Ⅱ遗传算法求解并对结果进行了分析。优化设计后的折纸管在保持质量不变的情况下,总吸能增加了144.9%,峰值力下降了46.5%,相比初始结构得到了明显提高。

关键词: 复合材料, 折纸管, 吸能, 代理模型, 多目标优化

Abstract: Thin-walled structures are widely used in energy-absorbing devices. Traditional straight-tube carbon fiber resin-reinforced composite (CFRP) thin-walled structures always exhibit problems of high peak force and large fluctuations in force-displacement curves when they are crushed. However, the energy-absorbing device must ensure gradual and controlled energy absorption and avoid possible excessive peak forces. Therefore, the CFRP thin-walled tube structure needs to be further improved as an energy-absorbing device. Compared with the traditional straight tube structure, the CFRP origami tube has better energy absorption characteristics due to its unique structural form. The energy absorption characteristics of origami tubes under axial load were studied through numerical simulation, and the nonlinear mapping relationship between the energy absorption characteristics indexes of the tubes and their geometric parameters was obtained. A multi-objective structural optimization design model considering maximization of total energy absorption and minimization of peak force was established, and the NSGA-Ⅱ genetic algorithm was used to solve the problem and the results were analyzed. The optimized design of the origami tube increases the total energy absorption by 144.9% and reduces the peak force by 46.5% while maintaining the same mass, which is significantly improved compared with the original structure.

Key words: composite materials, origami tube, energy absorption, surrogate model, multi-objective optimization

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