基于参数反求的汽车乘员肋骨有限元模型

Finite element models of vehicle's occupant ribs based on the inverse method

为预测和评判汽车碰撞事故中乘员胸部肋骨骨折引起的胸部损伤,对一位中国成年男性志愿者进行CT扫描,建立了具有人体解剖学结构的肋骨有限元模型。为提高模型的生物仿真度,通过动物组织反求试验获得肋骨材料参数。模型用Kindig所做的人体肋骨载荷试验进行验证,并与直接引用参考文献材料参数得到的仿真数据进行比较。结果表明:其位移-反作用力曲线与试验曲线吻合较好;采用反求方法获取的材料参数进行仿真计算时肋骨具有更好的生物仿真度。

In order to predict and evaluate the human thoracic injuries caused by rib fracture in car crashes, a finite element model of human ribs having the features of human anatomy structure is established and verified based on the CT scanning of a 50 percentile Chinese male volunteer. To improve the model＇s biological fidelity, the material parameters of ribs are gained by reverse experiment of animal tissue. The model is verified by the Kindig＇s load experiment of human body ribs and compared with the simulation data, which the material parameters were cited directly from the reference. The results show that the reaction force-displacement curve agrees well with the experimental curve and the model has a better biological fidelity when the material parameters were gained from the reverse engineering method.