汽车碰撞试验假人皮肤材料的参数研究  

Reverse technology for dummy skin material parameters of vehicle crash test

作　　者：曹立波[1] 华歆 张冠军[1] 张恺[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点试验室

出　　处：《汽车安全与节能学报》2014年第3期282-288,共7页Journal of Automotive Safety and Energy

基　　金：国家"八六三"高技术研究发展计划项目(2012AA111802);湖南大学汽车车身先进设计制造国家重点实验自主研究课题(51275001)

摘　　要：为了对假人有限元模型的开发提供准确的皮肤材料参数,对汽车碰撞试验假人皮肤材料进行了应变率分别为0.001、0.01、0.1和2 s-1以及压缩率分别为10%、20%和30%的单轴压缩试验,并通过试验数据拟合得出二阶Ogden模型参数。建立该压缩试验的有限元仿真模型。通过混合遗传算法(GA-LFOP)对二阶Ogden模型中4个材料参数进行优化,获得一组最佳拟合参数。利用不同碰撞速度下的假人头部跌落试验对反求得到的材料参数进行验证。仿真与试验结果吻合良好,误差小于4%。In order to provide reasonable material parameters of dummy skin for development of finite element model, a series of uniaxial compression tests were conducted （strain rates of 0.001 s-1, 0.01 s-1, 0.1 s-1, and 2 s-1 engineering strain levels of 10%, 20%, and 30%） with parameters of two-term Ogden model are obtained by fitting the test data. Finite element simulation model of test was built and a group of optimal parameters which allowed the minimum error between the data of test and simulation were acquired by optimizing the material parameters of two-term Ogden model with Hybrid genetic algorithm. Calibration tests of dummy head with different velocities are conducted to validate the optimal parameters, and the error is less than 4%.

关 键 词：汽车安全 碰撞试验 假人皮肤 Ogden模型 混合遗传算法 参数反求 

分 类 号：U461.91[机械工程—车辆工程]