仿生蛛网结构吸能特性研究及理论分析OA

With the rapid development of the automotive industry,the requirements for automotive safety performance are becoming increasingly higher.The energy absorption efficiency of the current automotive energy-absorbing boxes cannot meet these requirements,and new types of energy-absorbing boxes need to be designed to solve this problem.Based on the web structure,the basic bionic structure of the automotive energy-absorbing box(BSS type)is proposed.On this basis,some types of bionic structures,namely BSS-S,BSS-R,and BSS-SR types,are designed.Dynamic impact simulations of the energy-absorbing boxes with the four types of structures are carried out using Abaqus/Explicit software.The energy absorption performance,deformation modes of the bionic structures,and the impact of internal structural rotation on energy absorption performance during the impact process are analyzed.Based on the simplified super-folding theory,average compression force models for each bionic structure are proposed,and the corresponding theoretical prediction expressions are derived to facilitate the rapid prediction of the energy absorption characteristics of varying structures.After the internal hexagonal rotation(0°and 30°),the basic unit type of the bionic structure is changed,and its deformation modes and energy absorption performance are improved.The results show that the performance index of the BSS-R type structure is greater than that of other structure performance indices,and it has better overall energy absorption characteristics.The average compression force model established by the simplified super-folding theory(SSFE)is in good agreement with the numerical simulation results and can quickly determine the average compression force of the structure.