Configuration Design and Modeling Simulation of Welding Double-layer Synchronous Crumple Collision Energy-absorbing Structure

Abstract

In order to solve the problem of miniaturized fuel vehicle or pure electric vehicle with small space, so that it is not possible to install the traditional collision-absorbing structure, a kind of thin-wall rectangular tubular energy-absorbing structure configuration, which is by welding Q420 and aluminum alloy, is designed. The geometric model that be modeled by SolidWorks is imported into LS-DYNA software for orthogonal marshalling simulation test and analysis of significant structural parameters. And then, the theory equations of the energy-absorbing efficiency and structural parameters is deduced by the least square method. The results show that the energy absorption efficiency can be 85%, when the structure length is only about half of the traditional single layer structure. The wall thickness of inner or outer layers and length are two significant factors that influence the absorption efficiency. In a certain range, the absolute error of theoretical calculation and simulation results is less than 5%, The equation has obvious effectiveness.