用于冲击动力学响应分析的人体颈部有限元模型建立和验证  

Development and Validation of a Human Neck FE Model for Dynamic Response During Impact Condition

作　　者：张建国[1] 王芳[1] 薛强[1] 

机构地区：[1]天津科技大学机械工程学院,天津300222

出　　处：《生物医学工程学杂志》2009年第2期318-322,共5页Journal of Biomedical Engineering

基　　金：863计划项目资助(2006AA040201)

摘　　要：根据冲击动力学响应分析要求,建立了中国人C1-C7颈椎及T1胸椎复合体三维有限元模型。该模型以中国50百分位成年健康男性为建模素材,通过螺旋CT扫描生成DICOM格式图像数据;利用Materialisc mimics、逆向软件及Pro-E进行三维重建;运用TrueGrid划分网格,模型由椎骨、椎间盘、小关节、韧带和肌肉等结构组成:共得到15023个单元和24916个节点,其中实体单元14626个、杆单元19个、索单元378个。在LS-DYNA中仿真,所得结果与前碰撞志愿者实验数据基本相符。我们提出了一种快速、逼真建立复杂有限元模型的方法,高质量的八节点六面体单元,提高了计算的速度和稳定性。进行模型的冲击动力学响应分析,对于研究中国人颈部损伤具有重要意义。This study was conclucted to develop a three-dimension finite element （FE） model of Chinese human neck for dynamic response during impact condition. A 50^th percentile adult human in good health was chosen as a model. The 3-D FE model of C1-T1 was constructed by using of SCT scanning technology to get the data of DICOM format, using software Materialisc mimics, Pro-E to achieve three-dimension reconstruction, and using software TrueGrid to mesh. The model was composed of cervical vertebra, discs, facet joints, ligaments and muscles, which consisted of 24916 nodes and 15023 elements, including 14626 eight-node solid elements, 19 two-node link elements and 378 two-node cable elements. In LS-DYNA, the dynamic response of human neck under frontal impact was investigated and compared with experimental results so as to validate the model. The method proposed can develop complex FE model with eight-node elements fleetly and accurately in order to make computing more stably. The developed three-dimension FE model was used for dynamic response during impact condition, which may be helpful to studies on the injury of Chinese human neck.

关 键 词：颈椎 有限元模型 冲击载荷 动力学响应 

分 类 号：R318.01[医药卫生—生物医学工程]