轿车侧面碰撞乘员舱分区刚度优化与匹配研究  

A Study on the Optimization and Matching of Subarea Stiffness in the Passenger Compartment of a Car for Side Impact

作　　者：胡玉梅[1,2] 姜亚洲[1,2] 禹慧丽 崔泰松[2] 杨芳霞[2] 

机构地区：[1]重庆大学,机械传动国家重点实验室,重庆400044 [2]汽车噪声振动和安全技术国家重点实验室,重庆400039

出　　处：《汽车工程》2014年第8期950-956,949,共8页Automotive Engineering

基　　金：汽车噪声振动和安全技术国家重点实验室开放基金(NVHSKL-201015)资助

摘　　要：针对国内自主品牌轿车在侧碰中常出现车身侧面侵入量较大,导致侧面安全得分较低的现状,对轿车乘员舱刚度的优化与匹配进行了研究。将车身侧面碰撞区域划分为6个分区;通过整车侧面碰撞仿真,并结合正交优化得到了借助改变材料厚度和选用屈服强度高的材料来提高轿车侧面结构抗撞性的方案组合、各分区刚度的匹配和分区刚度与乘员伤害指标的关系。结果表明:整车侧面碰撞6个分区的刚度可明显分为高、低两组,各组的刚度曲线均呈"山峰"状,且组内和组间的刚度都存在一定的关系;优化方案对侧面结构抗撞性的改善最终体现为各刚度曲线同步上升,最后推算出了"峰值"刚度与乘员胸部得分之间的关系。In view of the current situation that the self-developed cars in China often get low score in sidesafety due to the large side intrusion in side-impact,a study on the stiffness optimization and matching of passenger compartment is conducted. The side-impact area of passenger compartment is divided into 6 subareas,and by sideimpact simulation combined with orthogonal optimization,some scheme combinations for improving the crashworthiness of side structure by changing panel thickness and using high yield strength material,as well as the stiffness matching of each subarea and the relationship between subarea stiffness and occupant injury criteria are obtained.The results show that the stiffness in 6 subareas of car side-impact area can obviously be divided into high and low two groups with the stiffness curve of each group exhibiting a shape of mountain and there exist some relationships in stiffness both within a group and between two groups. The improvement in the crashworthiness of side-structure by optimization schemes is finally reflected in the concurrent rise of stiffness curves,and the relationship between the side-impact score in occupant thorax and the peak stiffness is also reckoned in the end.

关 键 词：侧面碰撞 乘员舱刚度 结构抗撞性 正交试验设计 

分 类 号：U467.14[机械工程—车辆工程]