腰椎三维几何和力学模型

Three dimensional geometrical and mechanical modeling of the lumbar spine

该研究的主要目的是制作一个精密的腰椎运动节段三维几何和三维有限元模型。该模型的建立是把ＣＴ图象矢量化、数字化形成三维几何模型。划分单元后输入各结构的力学特征，形成有限元模型。通过有效性检验，说明它是一个有价值的模拟工具，能够在不同状态下模拟脊柱活动。

The main objective of this study is to deisgn a three dimensional geometrical and mechanical finite element model of the lumbar motion segments.The models construction is to form a three dimensional geometrical model by using CT image and making a change to be the form of vector and number.Thus,after the elements are divided,and mechanical characteristics are introduced for the elements the geometrical model becomes a mechanical one.The global coherece of the model has been verified,and it shows it will be a valuable simulation tool for the mechanical study of the spine behavior in various situation.