约束系统匹配对车-车斜角碰撞中驾驶员损伤影响  

Study on Development and Optimization of Driver Restraint System for Car-to-Car Oblique Collision

作　　者：费敬 陈可明[1] 乐中耀[1] 郝海舟[1] 颜凌波[2] 

机构地区：[1]中国汽车工程研究院,重庆401122 [2]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082

出　　处：《汽车工程学报》2014年第5期335-341,共7页Chinese Journal of Automotive Engineering

基　　金：国家重点基础研究发展计划(973计划)(2012CB723802)

摘　　要：在汽车斜角碰撞过程中,前部车体会发生严重变形从而危害乘员安全,而约束系统的有效匹配可有效降低乘员的损伤。基于不同斜角度碰撞下车-车碰撞相容性的研究,建立了30°斜角碰撞下被撞车辆的多刚体-有限元模型及约束系统模型。同时选取安全带预紧时间、气囊起爆时间、气囊质量流率缩放系数、安全带刚度系数、气囊织物泄气系数、安全带初始松弛量及气囊体积缩放系数为研究变量,通过拉丁超立方试验设计方法,以加权损伤指标WIC为目标函数,建立了二阶响应面近似模型,对约束系统参数进行最优设计。研究结果表明,优化后的加权损伤指标WIC值比优化前减小了8.33%,驾驶员安全性获得提高。In a car oblique collision, the front of the car will be severely deformed and the occupants are endangered. Based on compatibility of 30 degree oblique car-to-car impact, the MB-FE restraint system model of Yaris was establisbed using software MADYMO. Meanwbile, PSM method was applied to simulate the collision process. The parameters, including the pretension time of＂ the salbty belt, the airbag deployment time, the scaling coetticient of mass flow rate, tbe stiffness coetticient of tbe belt, the permeability coelticient of the airbag fabric, the initial slack of the belt and the scaling coefficient of the airbag volume, were optimized using Latin Hypercube Sampling method, and the dual-response surface model was constructed. Simultaneously, the weighted index of comorbidities （WIC） was considered as the object function. The optimal parameters of the restraint system were obtained to better protect drivers. The results show that the comprehensive assessment value of WlC declines by 12 percent and the safety of drivers is improved.

关 键 词：斜角碰撞 相容性 约束系统 参数优化 

分 类 号：U469.61[机械工程—车辆工程]