自相似仿生层次多胞薄壁管的耐撞性研究及优化

仿生结构以其优异的力学性能被广泛的应用于各种机械结构中。为了提高薄壁结构的耐撞性，将结构仿生学概念引入其结构设计中，提出了一种新型的多胞薄壁吸能结构。采用了理论和数值模拟技术对0~2阶次层次截面的薄壁结构进行对比分析，结果表明:随着仿生层次结构的不断增加，仿生薄壁结构的吸能特性与变形模式进一步提升。同时，结合响应面法和遗传算法对2阶层次截面的薄壁结构进行了优化，并得到了相应的Pareto前沿图，为薄壁结构的耐撞性设计提供了新思路。

Research and Optimization on Crashworthiness of Self-similar Bionic Multi-cell Thin-walled Tube

Bionic structure is widely used in various mechanical structures for its excellent mechanical properties. In order to improve the crashworthiness of thin-walled structures, the concept of structural bionics is introduced into the structural design, and a new multi-cell thin-walled energy absorbing structure is proposed. With the increase of biomimetic hierarchical structure, the energy absorption characteristics and deformation mode of bionic thin-walled structure are further improved. At the same time, the response surface method and genetic algorithm are combined to optimize the thin-walled structure with the second-order hierarchical cross-section, and the corresponding Pareto front diagram is obtained, which provides a new idea for the crashworthiness design of the thin-walled tube structure.