摘要
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。
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.
作者
徐少强
李伟伟
李琳
XU Shaoqiang;LI Weiwei;LI Lin(School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo 255000,Shandong,China;School of Mathematics and Statistics,Shandong University of Technology,Zibo 255000,Shandong,China)
出处
《机械科学与技术》
CSCD
北大核心
2022年第12期1852-1859,共8页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金青年基金项目(11902183)。
关键词
耐撞性
薄壁结构
层次结构
遗传算法
优化设计
crashworthiness
thin-walled structure
hierarchical structure
genetic algorithm
optimization design
