正面碰撞中乘员下肢损伤优化研究  

Research on Lower Limb Injury Optimization in Frontal Crash

作　　者：黄志鹏 凡沙沙 段大禄 贾丽刚 HUANG Zhi-peng;FAN Sha-sha;DUAN Da-lu;JIA Li-gang(SAIC General Motors Wuling Automobile Co.,Ltd.,Technology Center,Guangxi Liuzhou 545005,China)

机构地区：[1]上气通用五菱汽车股份有限公司技术中心,广西柳州545005

出　　处：《机械设计与制造》2024年第9期136-140,共5页Machinery Design & Manufacture

基　　金：广西创新驱动发展专项资金项目资助(桂科AA19182003)。

摘　　要：某车型在开发过程中正面碰撞工况中存在前排乘员侧假人下肢小腿压缩力和膝部盖移量过高问题,通过对试验中假人下肢运动及受力情况进行分析,建立正碰工况有限元约束系统仿真模型与试验结果进行仿真对标,找到假人下肢小腿压缩力和膝盖滑移量过高的主要原因,并且通过改变地毯造型面结构,限制脚部在碰撞过程中的向前运动距离,有效降低了假人下肢小腿轴向压缩力和膝盖滑移量,同时总结出脚部区域地毯面和仪表板腿部接触区域造型要求。In the frontal crash test of a car development project,there were high leg compression force and knee sliding displace⁃ment problems on the passenger side dummy.Through the analysis of the dummy’s lower limb movement and load distribution during the test,and setting up the finite element constraint system simulation model to make a calibration for test results,then found out the main cause of the high leg compression force and knee sliding displacement.And by changing the structure of carpet to limit foot movement in the process of collision,it effectively reduces the dummy’s leg compression force and knee sliding dis⁃placement.And then sums up the molded surface requirements of carpet surface at foot area and dashboard at legs contact area.

关 键 词：下肢损伤 正面碰撞 有限元分析 结构优化 

分 类 号：TH16[机械工程—机械制造及自动化]