某车偏置碰撞中假人胸部压缩变形量偏大的影响因素  

Influencing factors of the dummy chest displacement behave excessively large of a vehicle in the frontal offset impact test

作　　者：商恩义[1,2] 周大永[1,2] 刘卫国[1,2] 韩刚[1,2] 

机构地区：[1]浙江吉利汽车研究院有限公司 [2]浙江省汽车安全技术研究重点实验室

出　　处：《汽车安全与节能学报》2016年第1期60-65,共6页Journal of Automotive Safety and Energy

基　　金：浙江省汽车安全控制技术重点实验室建设(2009E10013)

摘　　要：为了提高在中国新车评价规程(C-NCAP)评价中假人胸部得分,对某车正面偏置碰撞试验中驾驶员假人的胸部伤害指标进行了优化。分析了假人胸部和骨盆受力,其结果表明:该车驾驶员座椅坐垫刚度前高后低,导致碰撞中假人骨盆回弹过快、胸部前扑过猛,安全带腰带被上拉,此过程造成假人胸部下端溃缩,胸部压缩变形量增大。而后通过仿真和台车试验,对座椅进行了优化。通过将座椅坐垫下方钢丝结构焊接连接钢丝,将坐垫后端刚度提升了约50%。结论是:在偏置碰撞试验中,座椅坐垫后端刚度偏低时,提高其后端刚度,在C-NCAP评价中可以提高1分左右。The chest injury values of a driver side dummy were optimized in a frontal offset impact test to heighten the dummy chest point as in the China New Car Assessment Program（C-NCAP）. Chest loads and pelvis loads of a dummy were analyzed. The analyzed results are that the fore-end of driver side seat cushion is higher and the back-end is lower, which cause the pelvis rebound back too quick and the chest go ahead with a rush, and the waist belt is draught up. During this course the low-end of chest-frame is compressed, going with the displacement enlarged. The seat structure was optimized by computer aided engineering（CAE） and sled test to enhance the rigidity of seat cushion back-end about 50%, with the method of welding the connection steel wire between the steel wires under the seat cushion. The results show that enhancing the rigidity of the backend at the seat cushion can heighten about 1 point of C-NCAP assessment when the rigidity of seat cushion is lower as wish in the frontal offset impact tests.

关 键 词：汽车 被动安全 偏置碰撞试验 胸部压缩变形量 座椅坐垫刚度 

分 类 号：U461.91[机械工程—车辆工程]