基于汽车前端刚度分析的降低小腿加速度快速设计方法  

A Rapid Design Method for Reducing Tibia Acceleration Based on the Analysis on Vehicle Front-end Stiffness

作　　者：黄俊[1] 夏勇[1] 周青[1] 

机构地区：[1]清华大学,汽车安全与节能国家重点实验室,北京100084

出　　处：《汽车工程》2012年第8期679-685,691,共8页Automotive Engineering

基　　金：国家自然科学基金项目(50705046)资助

摘　　要：现行法规用行人小腿模块碰撞试验方法来评估汽车的行人腿部保护性能,对汽车前端结构的设计提出了新的要求。本文中提出了一种基于刚度的控制策略,以辅助工程师快速确定导致小腿加速度峰值超标的原因。通过前端结构不同位置、尺寸和刚度参数的组合,进行了24个有限元碰撞模拟,分析了前端结构各设计参数对其综合刚度以至加速度峰值的影响。最后给出该策略在某实际车型的应用实例。The current regulation uses pedestrian lower legform impaetor test to assess the pedestrian leg protection performance of vehicles, which imposes new design requirements on vehicle＇s front-end structure. In this paper, a stiffness-based control strategy is proposed for assisting engineers to quickly identify the causes of excess tibia acceleration over regulation limit. By the combination of different position, dimension and stiffness parameters of front-end structure, 24 FE crash simulations are conducted to analyze the effects of design parameters of front-end structure on its overall stiffness and tibia acceleration. In the end a real vehicle example for the application of the proposed strategy is given.

关 键 词：汽车 前端结构 行人 小腿模块 综合刚度 局部刚度 

分 类 号：U462[机械工程—车辆工程]