假肢接受腔界面应力的有限元分析  

Finite element analysis of interface stress of the prosthetic socket

作　　者：曾育山[1] 

机构地区：[1]海南省人民医院康复中心,海南省海口市570311

出　　处：《中国组织工程研究与临床康复》2008年第35期6911-6914,共4页Journal of Clinical Rehabilitative Tissue Engineering Research

摘　　要：假肢是用来代偿正常人体截肢部位机能和外表形状的装置,安装假肢是截肢患者恢复活动能力和外观的主要康复手段。假肢接受腔作为人与机械系统之间生物力学的界面,是截肢患者肢体残端和假肢之间载荷传递的惟一通道,必须根据患者的具体情况因人而异,以满足功能性、舒适性的要求。一个完整的残肢接受腔有限元模型包括几何模型、材料特性、载荷状况和模型边界条件。下肢残肢-假肢接受腔界面应力的有限元理论仿真要求能够达到快速建立几何模型、准确模拟不同部位的材质特性、定义人机界面的接触特征、精确施加动态载荷。假肢接受腔以人工假肢个性化制造为研究对象,运用有限元法进行生物力学分析,并集成了生物医学、三维计算机辅助设计技术和快速成型技术。Prosthesis is a device replacing function and appearance of amputation site of human. Prosthesis installation is a main rehabilitation maneuver of recovering motion and appearance of the amputation patients. Prosthetic socket, a biodynamics interface between human and mechanical system, is the only channel for load transfer between limb stump and prosthetic limb, so the prosthetic socket should be various for different individuals to satisfy requirements of functionality and easement. Finite element models of a complete stump socket contains geometric model, material characteristics, load condition and model boundary condition. Finite element simulation requirements of finite element theory are that interface stress between lower residual stump and prosthetic socket can rapidly establish geometric model, accurate simulate material property at different regions, define contact characteristic of man-machine interface, and precisely exert dynamic load. Prosthesis individuation has been deeply studied. Biodynamics of the prosthetic socket is analyzed by using finite element method, and combined with biomedicine, 3-dimensional computer aided design and fast modeling technique.

关 键 词：假肢 三维有限元 接受腔 

分 类 号：R318[医药卫生—生物医学工程]