基于小偏置碰的乘员二次碰撞分析及约束系统仿真优化  

Occupant secondary impact analysis and restraint system simulation optimization under small offset impact

作　　者：蒋成约 张伟[2] 任立海[2] 胡远志 李军[2] 黄杰[1] JIANG Chengyue;ZHANG Wei;REN Lihai;HU Yuanzhi;LI Jun;HUANG Jie(State Key Lab of Vehicle NVH and Safety Technology,Chongqing,401320,China;MOE Key Lab of Advanced Manufacture Technology for Automobile Parts,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]汽车噪声振动和安全技术国家重点实验室,重庆401320 [2]重庆理工大学汽车零部件先进制造技术教育部重点实验室,重庆400054

出　　处：《振动与冲击》2021年第3期35-39,共5页Journal of Vibration and Shock

基　　金：汽车噪声振动和安全技术国家重点实验室2019年度开放基金课题(NVHSKL-201905);国家自然科学基金(51405050);重庆市教委科学技术研究项目(KJQN201901141)。

摘　　要：研究64 km/h小偏置碰的乘员动态响应及约束系统参数影响。通过建立50 km/h全正碰与64 km/h小偏置碰的约束系统模型,比对两种工况中的乘员二次碰撞运动姿态与损伤特点。仿真结果表明小偏置碰中乘员上躯干相对车体产生较大的横向加速度,导致头部和颈部等部位损伤加剧。基于上述损伤特点,导入侧气帘模块并分析其对乘员损伤的影响;优化驾驶员侧气囊袋形并通过代理模型方法匹配其参数。CAE优化结果显示小偏置碰中假人头部HIC 36和颈部N ij分别降低61.75%和31.3%,加权损伤指标(WIC)降低了47.22%。Here,vehicle occupant dynamic responses and influences of restraint system parameters were studied under 64km/h small offset impact.Restraint system models under both 50km/h full frontal impact and 64km/h small offset impact were established,and the movement posture and injury characteristics of occupant in the secondary impact under the two working conditions were compared.The simulation results showed that occupant’s upper body relative to the vehicle body has larger lateral acceleration under small offset impact to cause occupant’s head and neck damage aggravated.Based on the above damage characteristics,a side air curtain module was introduced and its effects on occupant damage were analyzed,the shape of the driver’s side airbag was optimized and its parameters were matched with the surrogate model method.CAE optimization results showed that under small offset impact,the dummy’s head HIC36 and neck Nij are reduced by 61.75%and 31.3%,respectively,and its weighted injury criteria(WIC)is reduced by 47.22%.

关 键 词：小偏置碰撞 气囊设计 代理模型 约束系统优化 

分 类 号：U491.6+1[交通运输工程—交通运输规划与管理]