骨组织动电效应的有限元分析

Finite Element Analysis on Electromechanical Behaviours in Bone Tissues

基于电效应在临床医疗方面的重要意义 ,根据骨组织的生理结构特点 ,将骨组织看作是一种由固体骨基质和细胞外液等液体所组成的两相混合物 ,利用基于混合物理论的两相多孔介质模型并结合电动理论 ,建立了用于描述骨组织的骨质变形、骨液流动以及骨内流动电位的模型 ,并由Galerkin加权残值法和罚方法得到了有限元方程。通过自编程序对骨组织的变形场、流动场和流动电位进行了数值分析和模拟。

According to the importance of electromechancial behavior of bone on clinical medical treatment, the physiological structure of bone tissue is studied. Then the biphasic porous media theory associated with electro kinetics is used to model the electromechanical effects in bone tissue. The finite element governing equations are built up through Galerkin method and the penalty method. The distortion of skeleton, interstitial fluid flow and the streaming potential in bone tissue are numerically computed and simulated.