基于虾螯结构的仿生薄壁管吸能特性分析及优化

Energy Absorption Analysis and Optimization of a Bionic Thin-Walled Tube Based on Shrimp Chela

为提高薄壁管结构的耐撞性和吸能性,基于雀尾螳螂虾螯结构,结合结构仿生学原理设计出具有仿生晶胞单元薄壁管,利用有限元法模拟了仿生薄壁管碰撞吸能特性,采用响应面法进行薄壁管结构优化.结果表明,仿生薄壁管的比吸能较普通薄壁管的分别提高了11.1%(轴向)和24.6%(径向),优化得到仿生薄壁管轴向和径向吸能特性最优的结构尺寸,比吸能分别为27.0 kJ/kg(轴向)和10.8 kJ/kg(径向),该薄壁管仿生设计和响应面优化方法为吸能元件的轻量化设计提供了新思路.

A thin-walled tube with bionic cell was developed based on shrimp chela structure of odontodactylus scyllarus to improve the crashworthiness and energy absorption of thin-walled tube.The finite element method was adopted to simulate the axial and radial energy absorption of the bionic thin-wall tube.A response surface method was used to obtain optimal structure of the bionic thin-wall tube.Simulation results show that,the specific energy absorption(SEA)of bionic thin-walled tube can be improved by 11.1%(axial)and 24.6%(lateral),respectively,compared with the normal thin-walled tube.The optimization structure dimensions can be obtained.The optimal value of SEA is 27.0 kJ/kg(axial)and 10.8 kJ/kg(lateral),respectively.This research provides new methods for lightweight designing of thin-walled structures.