Crashworthiness Optimization of a Vertex Fractal Hexagonal Structure
Crashworthiness Optimization of a Vertex Fractal Hexagonal Structure
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DOI：
10.1142/s0219876219500312
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发表时间：
2020-09-01
影响因子：
1.7
通讯作者：
Hou, Yubo
中科院分区：
文献类型：
--
作者：
Zhang, Yong;He, Ning;Hou, Yubo
薄壁结构因其优良的轻量化和耐撞性而在汽车工业中得到广泛应用。为了开发一种新型的轻质吸能器，提出了一种顶点分形多胞六角形结构。采用实验分析和数值模拟相结合的方法，研究了多胞六方结构的耐撞性。数值结果表明，分维六方结构的分维构型和几何参数对分维结构有显著影响。关于耐撞性。此外，还进行了多目标设计优化，以寻求最优的耐撞性参数，探索出最优的耐撞性。结果表明，分维多胞六方结构优于非分维六方结构。
Thin-walled structures are used in automotive industry due to their excellent lightweight and crashworthiness properties. This paper proposes a vertex fractal multi-cell hexagonal structure to develop a novel lightweight energy absorber. Experimental analysis and numerical modeling are performed to investigate the crashworthiness of the fractal multi-cell hexagonal structures. The numerical results indicate that fractal configurations and geometrical parameters of the fractal hexagonal structure have significant effect. on the crashworthiness. In addition, the multi-objective design optimization is performed to seek the optimal crashworthiness parameters and explore the optimal crashworthiness of the fractal hexagonal structure. The results show that the fractal multi-cell hexagonal structure outperforms non-fractal hexagonal structure.