微型电动车小偏置碰撞下约束系统参数的匹配研究  

Parameters Matching of Restraint System for Mini Electric Vehicles Under Small Offset Collision

作　　者：郝琪 崔宏伟 刘正午 梅佳炜 HAO Qi;CUI Hongwei;LIU Zhengwu;MEI Jiawei(School of Automotive Engineering,Hubei University of Automotive Technology,Shiyan 442002,Hubei,China)

机构地区：[1]湖北汽车工业学院汽车工程学院,湖北十堰442002

出　　处：《机械科学与技术》2023年第12期2110-2117,共8页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(11502075);湖北省重点实验室创新基金项目(2015XTZX0418);湖北省揭榜制项目(2023BEB047)。

摘　　要：根据某微型电动汽车的实验对标整车模型,建立有效的简易约束系统模型,研究64 km/h小偏置碰的乘员动态响应及约束系统输入条件。通过对约束系统中侧气帘质量流缩放率、安全气囊点火时间及安全带限力峰值等7个相关参数进行单变量乘员伤害分析,确定在小偏置碰撞下约束系统4个主要影响因素。设计四因素九水平的正交试验,计算约束系统不同匹配参数对乘员加权伤害指标(WIC)以及乘员头部、颈部、胸部、腿部等的影响等级,结合等级极差比参数给出小偏置碰约束系统调整及匹配建议。并进一步构建约束系统参数与WIC的高阶多项式代理模型,确定了约束系统的最优组合解。结果表明头部损伤指标HIC15降低了64%,整体加权综合损伤WIC值降低56%。According to the standard vehicle model of a mini electric vehicle,an effective simple restraint system model is established to study the occupant dynamic response and restraint system input conditions of 64km/h small offset collision.Through univariate driver injury analysis on 7 related parameters of the restraint system,such as the side air curtain mass flow scaling rate,the ignition time of the airbag and the peak limit force of the seat belt,the four main influencing factors of the restraint system under a small offset collision are determined.A four-factor and nine-level orthogonal experiment is designed;The impact of different matching parameters of the restraint system on the weighted injury index(WIC)of the occupant and the occupant's head,neck,chest,legs,etc.is calculated;Combined with the range ratio parameter,a small deviation advice on adjustment and matching of the collision restraint system is given.Furthermore,constructing a high-order polynomial surrogate model of the constraint system parameters and WIC,and the optimal combination solution of the constraint system is determined.The results showed that the head injury index HIC was reduced by 64%,and the overall weighted comprehensive injury WIC value was reduced by 56%.

关 键 词：小偏置碰 约束系统 正交试验 代理模型 

分 类 号：U491.61[交通运输工程—交通运输规划与管理]