面向轻量化的高强度SMC保险杠碰撞性能研究  

A Study of the Impact Performance of a High-strength Sheet Molding Compound(SMC) Bumper for Lightweight

作　　者：刘海江[1] 刘娜[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：《机械科学与技术》2011年第5期813-817,822,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家高科技研究发展计划(863计划)项目(2008AA04Z105)资助

摘　　要：以国内某车型的保险杠为研究对象,以高强度片状模塑料复合材料(SMC)作为轻量化材料替代原保险杠零件的高强度钢材料,运用显示有限元LS-DYNA软件对保险杠进行低速碰撞性能分析,选定SMC替换部分的保险杠最优厚度,并进一步对选定厚度的SMC保险杠进行结构优化。经碰撞仿真分析验证,新型保险杠能满足保险杠的低速碰撞标准要求,且其质量相对原高强度钢保险杠下降了29%,轻量化效果显著。The bumper is an important part of a car body.In order to decrease vehicle energy consumption,it is necessary to carry out lightweight bumper research.With a domestic car bumper as the prototype,high-strength steel of the original bumper parts is substituted by high-strength sheet molding compound（SMC）.With explicit finite element anlysis software LS-DYNA,the optimal thickness of SMC bumper parts is selected after bumper performance analysis of low-speed collision.Then the structure of the SMC bumper with selected thickness is optimized.The results of crashworthiness simulation show that the optimized new bumper satisfies the requirements of low-speed impact standard.Compared to the original high-strength steel bumper,the mass of the new one is decreased by 29% and its lightening effect is obvious.

关 键 词：保险杠 轻量化 SMC 结构优化 

分 类 号：U463.326[机械工程—车辆工程]