基于Hypermesh的汽车吸能盒结构参数优化设计

Optimization design of structural parameters of automobile energy absorbing box based on Hypermesh

汽车吸能盒作为保险杠内的一个重要吸能部件,在碰撞中可以起到吸收碰撞能量、保护纵梁、降低维修成本的目的,对提高整车的耐撞性具有积极作用。吸能盒板材厚度对其碰撞吸能性能有一定程度的影响。文中在Hypermesh软件中建立了吸能盒的碰撞冲击有限元模型,并对有限元仿真进行了结果验证。在结构参数优化后,对防撞梁进行模态分析,并通过对100%正面碰撞和40%偏置碰撞所产生的碰撞力和吸能时间进行低速碰撞仿真分析,结果表明,采用2 mm板材厚度的吸能盒的吸能特性性能比1.8 mm板材厚度的吸能盒的吸能特性更为优异。

As an important energy-absorbing component in the bumper,the automobile energy-absorbing box can absorb the collision energy,protect the longitudinal beam and reduce the maintenance cost in the collision,and it has a positive effect on improving the crashworthiness of the whole vehicle.The thickness of the energy-absorbing box plate has a certain influence on its impact energy-absorbing performance.In this paper,the collision impact finite element model of the energy-absorbing box is established in the Hypermesh software,and the results of the finite element simulation are verified.After the structural parameters of the energy absorption box are optimized,the modal analysis of the anti-collision beam is carried out,and the lowspeed collision simulation analysis is carried out on the collision force and energy absorption time generated by 100%frontal collision and 40%offset collision.The results show that the energy absorption characteristics of the box with 2 mm plate thickness are better than that of the box with 1.8 mm plate thickness.