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.
出处
《机械设计》
CSCD
北大核心
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)
关键词
保险杠
轻量化
碰撞仿真
有限元
bumper
lightweight
collision simulation
finite element
