基于甲虫鞘翅的客车八边形仿生多胞薄壁管耐撞性研究

Crashworthiness of coach’s octagonal bionic multi-cell thin-walled tubes based on beetle elytra

为了提升客车前部吸能结构的耐撞性,通过模拟甲虫鞘翅的微观结构,设计了一系列新型客车八边形仿生多胞薄壁管,并对其在轴向加载下的吸能特性进行了研究。首先,建立了八边形多胞薄壁管的有限元模型,然后,采用简化超折叠单元理论验证了有限元模型的有效性。最后,通过有限元仿真对比研究了八边形仿生多胞薄壁管与传统多胞薄壁管的耐撞性。结果表明,八边形仿生多胞薄壁管具有优异的耐撞性表现。

In order to improve the crashworthiness of a coach’s front energy-absorbing structure, a series of coach’s novel octagonal bionic multi-cell thin-walled tubes were designed through imitating microstructure of beetle elytra, and their energy absorption characteristics under axial loading were studied. Firstly, the finite element model for an octagonal multi-cell thin-walled tube was established. Then, the validity of the finite element model was verified using the simplified hyper folding element theory. Finally, the crashworthiness of an octagonal bionic multi-cell thin-walled tube and that of a traditional multi-cell thin-walled one were studied contrastively with finite element simulation. The results showed that an octagonal bionic multi-cell thin-walled tube has an excellent crashworthiness.