基于DOE的儿童乘员约束系统约束路径优化  

Parameter optimization of CRS' seatbelt constraint paths based on design-of-experiment(DOE)

作　　者：韩勇[1] 谢金萍[1] 卢晓萍[1] 王方[1] 黄红武[1] 水野幸治[2] 

机构地区：[1]厦门理工学院机械与汽车工程学院 [2]名古屋大学机械与情报工程研究科

出　　处：《汽车安全与节能学报》2015年第3期230-236,共7页Journal of Automotive Safety and Energy

基　　金：国家自然科学青年基金(31300784);国家外专局高端外国专家团队项目(GDT20143600027);厦门市科技技术项目(3502Z20153023)

摘　　要：为优化安全带固定式儿童乘员约束系统(CRS)安全带设计,用"试验设计方法(DOE)",优化约束路径参数。用CRS有限元模型,建立Hybrid III 3岁儿童假人正面碰撞仿真模型,用台车试验结果进行了验证。改进了CRS骨架结构,用正交试验设计,研究安全带导向环固定位置、骨架座椅厚度及儿童乘员与五点式安全带之间的摩擦因数等因素,对头部伤害指标(HIC15)值、胸部合成加速度、胸部垂直加速度等损伤参数的影响。结果表明:头部前倾位移量,从高于法规限值(550 mm)的1.5%,降到低于限值的15%。安全带导向环固定位置是最为敏感的因素;因此,优化导向环固定位置及降低摩擦因数,可减少头部最大位移量。A method to optimize the parameters of seatbelt constraint paths was built using a design of experiments （DOE） method to improve the safety performance of a type of seat belt fixed of the child restraint systems （CRS）. A front crash simulation model was set-up using an FE model of CRS and a Hybrid III 3-year old child dummy. The simulation results were verified with some sled tests. The influences of the seatbelt guide ring positions, the seat skeleton thickness and the friction coefficient between child and five-point harness on injury parameters, such as head injury criterion （HlCls） values, chest resultant acceleration and chest vertical acceleration, were analyzed after improving CRS framework structure, and by using orthogonal experimental design to select parameters. The results show that the head maximum displacement reduces from 1.5% higher than the regulation threshold to 15% lower than the threshold. The seatbelt guide ring position is the most sensitive factor. Therefore, optimizing the seatbelt guide ring position and reducing the friction coefficient can reduce the maximum displacement of the head.

关 键 词：汽车安全 儿童乘员损伤 儿童乘员约束系统(CRS) 安全带 正交试验 有限元方法 

分 类 号：U461.91[机械工程—车辆工程]