基于吸能率的车辆碰撞相容性分析及优化设计

Design Optimization of Vehicle Impact Compatibility Based on Energy Absorption Rate

开展了车辆防撞性和碰撞相容性的设计分析,提出了一种新型相容性指标——吸能率rE并验证其合理性,该指标可望解决现有评价指标对车辆侵入程度的量化缺乏连续性和普适性的问题。然后对参数化模型进行自动更新,从而进行设计变量优化求解,最终形成一套集成设计方法。工程实例显示,提出的吸能率指标rE可实现对目标车辆攻击性程度的连续量化评估,参数化优化策略可有效提升车辆碰撞相容性和设计优化效率。

In this paper,the design and analysis of vehicle compatibility between self-protection and aggressiveness were carried out.A new compatibility index,the energy absorption rate rE,was proposed and verified since the existing evaluation indexes were lack of continuity and universality in the quantification of damages to the opponent cars.Then the parametric model was updated automatically to optimize the design variables,and finally a set of integrated design method was formed.Its engineering applications show that by using the energy absorption rate rE,the aggressiveness of the target vehicle can be assessed continuously and quantitatively.And the proposed parameterized optimization strategy improves the efficiency of optimizing the vehicle impact compatibility.