摘要
通过构建人体有限元模型,研究交通事故中儿童胸腹部生物力学响应及损伤机理,对提高汽车安全性设计具有重要意义。基于CT医学图像构建了包括胸骨、肋骨和内脏等软硬组织在内的具有详细解剖学结构的6岁儿童乘员胸腹部有限元模型,并构建了具有真实几何形状的斜方肌、外斜肌、冈下肌、肩胛下肌等肌肉组织。利用所构建的模型重构了儿童胸部碰撞尸体试验,仿真得到的胸部撞击力-变形量曲线、粘性准则(Viscous Criterion,VC)值与尸体试验结果呈现一致性,表明了该模型的有效性。对碰撞中肋骨、心脏和肺等胸部组织器官的应力应变进行了分析,结合损伤准则讨论了其损伤状况及损伤机理。
The understanding of pediatric thoracoabdominal injury mechanism using finite element （FE） human body models is of great importance to improve the design of vehicle safety. Based on the CT data of a healthy 6-year-old child, the whole thorax and abdomen finite element （FE） model with detailed anatomical structures including internal organs such as lung, heart, was developed. The FE models of muscles, such as trapezius, infraspinatus, supraspinatus, external oblique muscle, were also developed in their true shape and true size. The pediatric cadaver thorax impact experiment was reconstructed using the developed thorax and abdomen FE model. Simulation results, such as force-displacement curves for thoracic impact and the thorax viscous criterion （VC）, were in accordance with the cadaver results, which showed the validation of the FE model. The stresses and strains of rib, heart and lungs were calculated, and their injury conditions and mechanisms were discussed according to injury criteria.
出处
《汽车工程学报》
2016年第6期418-424,共7页
Chinese Journal of Automotive Engineering
基金
国家自然科学基金(81201015
81471274
81371360)
关键词
6岁儿童乘员
胸部模型验证
有限元仿真
胸部损伤分析
6-year-old pediatric occupant
thorax model validation
finite element simulation
thoraxinjury analysis
