基于小偏置碰撞的轿车车身优化设计

Body Optimization of a Sedan Based on Small Overlap Impact

为了研究某轿车的小偏置碰撞结构耐撞性,根据美国公路安全保险协会(IIHS)的相关规定建立了某轿车的小偏置碰撞有限元模型。基于仿真结果总结该轿车结构耐撞性存在的问题,评估其小偏置碰撞结构耐撞性评级为"差"。从结构件优化设计和悬架系统安全性设计2个角度提出了该轿车的小偏置碰撞结构耐撞性优化方案。仿真结果表明:该轿车乘员舱侵入量显著降低,其结构耐撞性评级提升至"良"。该结果证明了优化方案的可行性。

In this paper,a small overlap impact finite element model was established according to the Insurance Institute for Highway Safety(IIHS)evaluation rating protocol,to study the crashworthiness of a sedan in small overlap impact.Then,according to simulation results,the problems of its structure were summarized,and the crashworthiness rating of the sedan was concluded as poor.The structure optimization was proposed through the structural design and suspension system safety design.The simulation results of the modified vehicle show that the intrusion was decreased obviously and the crashworthiness evaluation rating of the sedan was upgraded to acceptable which confirms the effectiveness of the optimization.