基于试验设计的汽车侧面碰撞结构改进  

Structural Improvement for Vehicle Side Impact Based on the Design of Experiment Methodology

作　　者：马春生[1] 张金换[1] 黄世霖[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》2014年第2期195-198,221,共5页Automotive Engineering

基　　金：国家“863”高技术项目(2006AA110102)资助

摘　　要：采用PAM-CRASH软件建立了某轿车的侧面碰撞有限元模型,对该模型进行有限元分析,并通过试验验证了其有效性。根据上述仿真和试验的结果分析了原结构存在的缺陷,提出了可能的结构改进措施,再采用正交试验设计分析了各结构参数对乘员伤害的影响程度,初步选定了结构改进方案。最后通过全因子试验确定了两处关键结构的具体参数。结果表明,改进后该车在侧面碰撞中的假人伤害指标得到改善,基于C-NCAP的假人得分由12分提高到13.2分。A finite element （FE） model for the side impact of a car is developed CRASH, on which a finite element analysis is conducted and a test is also performed with its with the software PAM- results verifying the va- lidity of the model. Base on the results of above simulation and test, the defects of the original structures are ana- lyzed and the possible structure improvement measures are proposed. Then the significances of the effects of struc- tural parameters on occupant injuries are analyzed by using the technique of orthogonal design of experiment with a preliminary scheme of structural modification selected. Finally the parameters of two key structures are determined through full-factorial experiment. The results indicate that the crash safety performance for side impact is improved after structure modification with the C-NCAP score increasing from 12 ooints to 13.2 ooints.

关 键 词：侧面碰撞 有限元分析 试验设计 结构改进 

分 类 号：U467.14[机械工程—车辆工程]