摘要
目的 建立正常人踝关节的三维有限元模型 ,作为该部位进一步有限元分析的基础。方法 采用活体踝关节为标本 ,应用CT扫描技术及图形数字化方法获取踝关节的三维坐标 ,输入有限元分析软件 ,并通过确定材料特性参数和网格化 ,建立踝关节的三维有限元模型。结果 建立的三维有限元模型几何形状与材料特性的还原性良好 ,可以满足有限元分析的需要。结论 采用CT扫描资料建立的三维有限元模型切实可靠 ,实体建模法将有限元模型的几何特征和边界条件的定义与有限元网格的生成分开进行 。
Objective To establish a three-dimensional finite element model of normal human ankle as a foundation of finite element analysis in this area.Methods Normal ankle in vivo was used as specimen. CT scan was used to obtain configuration, and by applying AutoCAD software, three-dimensional coordinate of the ankle was obtained. With the software of finite element analysis determining property parameter of material and meshing, a three-dimensional finite element model of the ankle was set up.Results The geometry shape and reduction of material character of the three-dimensional finite model establishment was ideal, which was able to cope with finite element analysis.Conclusion It is reliable to build three-dimensional finite element model with CT scan data and to simulate real and complicated geometry figure accurately. By the method of building the three-dimensional finite element model depended on entity, define border condition ,determine the geometry character of finite element model ,and mesh the model respectively,the difficulty of building the finite element model can be reduced.
出处
《临床骨科杂志》
2004年第3期277-279,共3页
Journal of Clinical Orthopaedics
关键词
踝关节
三维有限元模型
CT
ankle joint
three-dimensional finite element model
CT
