基于LS-DYNA的7075铝合金汽车保险杠碰撞仿真分析  

Collision simulation analysis of 7075 aluminum alloy car bumper based on LS-DYNA

作　　者：刘海江[1] 张夏[1] 肖丽芳[1] 

机构地区：[1]同济大学机械工程学院,上海201804

出　　处：《机械设计》2011年第2期18-23,共6页Journal of Machine Design

基　　金：国家高技术研究发展计划(863计划)资助项目(2008AA04Z105)

摘　　要：为了使汽车轻量化,将7075铝合金应用于汽车保险杠系统中。通过有限元软件LS-DYNA对不同厚度保险杠模型的低速对中碰撞进行仿真分析,选用2.5 mm厚加强板和2.0 mm厚齿状横梁,相比原钢质保险杠质量下降20.5%。最后对所选保险杠进行对中碰撞仿真分析。结果显示该保险杠不仅质轻,而且吸能充分,满足碰撞安全要求。In order to lightweight cars,the 7075 aluminum alloy was adopted in automotive bumper systems.The simulation analysis of low-speed centering collision of bumpers with different thickness was carried out by using finite element analysis software LS-DYNA.The stiffening plate with the thickness of 2.5 mm and the dentate beams with the thickness of 2.0 mm were chosen.The mass of the new bumper was lower by 20.5% compared with the original steel one.Finally the simulation analysis of low-speed centering collision of selected bumpers was carried out.The results showed that the bumper was not only lighter,but fully energy absorption,fully meeting the requirement for crash safety.

关 键 词：保险杠 轻量化 碰撞仿真 有限元 

分 类 号：TH142.2[一般工业技术—材料科学与工程]