摘要
为提升混杂工况下校车儿童乘员的安全性,对常开式安全气囊的保护性能开展优化设计。首先,明确6、12岁儿童的损伤阈值;然后,基于台车试验数据,构建与验证校车仿真模型,并搭建校车—常开式安全气囊耦合模型;最后,基于校车碰撞工况与儿童年龄的不同组合,建立6种混杂工况,决选常开式安全气囊的主要设计参数为优化因素,以加权伤害指标为优化目标,构建响应面代理模型。结果表明:利用改进型NSGA-Ⅱ算法,权衡确定上部拉带长度0.2588 m,安装点高度0.3856 m,泄气阀开启压力1.1996×10^(5) Pa,泄气阀开度1.98为最优配置;混杂工况下,具备最优配置的常开式安全气囊可最大限度地降低儿童乘员的损伤风险。
In order to improve child occupants'safety on school buses under mixed conditions,protective performance of normally-open airbag was optimized.Firstly,injury thresholds of 6-year-old and 12-year-old children were determined.Secondly,a simulation model of school buses was established and verified by sled test data,and a coupling model of school buses and normally-open airbag was built.Finally,based on different combinations of collision conditions and child ages,six mixed conditions were established.Finally,a response surface proxy model was constructed with airbag's main design parameters as optimization factors and weighted injury criterion as optimization target.The results show that according to improved NSGA-Ⅱalgorithm,the optimal configuration is upper strap length at 0.2588 m,height of installation position at 0.3856 m,initial pressure of exhaust at 1.1996×10^(5) Pa,and its opening degree at 0.98.And under mixed conditions,normally-open airbag with optimal configuration can minimize risk of injuries in child occupants.
作者
洪亮
刘刚
葛如海
李梁
李思远
HONG Liang;LIU Gang;GE Ruhai;LI Liang;LI Siyuan(School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang Jiangsu 212013,China;Goodbaby International Holdings Ltd.,Kunshan Jiangsu 215331,China;School of Automobile Engineering,Changshu Institute of Technology,Changshu Jiangsu 215500,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2022年第4期72-79,共8页
China Safety Science Journal
基金
国家自然科学基金资助(51805224)
中国博士后科学基金资助(2020M671307)
江苏省资助博士后研究人员计划项目(2019Z061)
江苏省博士后科研资助计划项目(2019K043)。
关键词
混杂工况
校车
常开式安全气囊
多目标优化
儿童损伤阈值
mixed conditions
school buses
normally-open airbag
multi-objective optimization
children injury thresholds
