基于头部合成加速度波形的发动机罩夹心层设计  

Design of the engine sandwich bonnet based on the head resultant acceleration waveform

作　　者：董丽萍[1] 朱西产[1] 马志雄[1] 张轶川[1] 

机构地区：[1]同济大学汽车安全技术研究所,上海201804

出　　处：《汽车安全与节能学报》2010年第4期292-296,共5页Journal of Automotive Safety and Energy

基　　金：上海市"科技创新"计划(10dz1122900)

摘　　要：为了提高行人碰撞中头部的保护性能,通过调整头部合成加速度波形,满足多胞复合材料夹心层蜂窝结构的发动机罩板设计要求。从头部合成加速度的实际波形,得到了头部伤害标准(HIC)在取值域上的极值条件。根据最优加速度波形理论,使用MADYMO和Hyper Study软件,得到了HIC值和头部侵入量随着材料参数的响应面,以及满足该条件的发动机罩夹心层复合材料的物理参数。结果表明:调整夹心层复合材料的弹性模量和压实应变,可以调整加速度波形,使头部合成加速度波形符合实用优化加速度波形,达到设计目的。The head resultant acceleration waveform was adjusted to meet the design requirements of the sandwich bonnet with honeycomb material to improve the head protection performance during pedestrian impact.The basic extreme conditions of HIC（head injury criterion） interval were deduced for the actual head acceleration waveform.The response surface of the HIC value and head displacement and the physical parameters of the honey-composite material used in the engine hood which meet the extreme conditions were obtained according to the optimal acceleration waveform theory,using the MADYMO and HyperStudy softwares.The results show that the resultant acceleration waveform can satisfy the actual design target by changing the Young＇s modulus and densification strain of the sandwich composite material.

关 键 词：行人保护 多胞复合材料 发动机罩 最优加速度波形 头部伤害标准(HIC) 

分 类 号：U461.91[机械工程—车辆工程]