摘要
作为传递体重、固定假肢的部件 ,接受腔对于小腿假肢使用的舒适性和方便程度有决定性的作用。本研究建立了基于有限元应力分析的小腿假肢生物力学评价技术平台 ,实现了小腿残端 /接受腔 3D几何建模与信息交互、三维有限元自动建模及应力分析。 3D模型与信息交互的实现基于得到广泛支持的OpenGL技术 ,有限元模型的构建采用了专门针对小腿残端 /接受腔结构特点的自动建模方法 ,通过构建档案数据库系统作为整个系统的操作平台。该技术平台可与现有的CAD/CAM系统相结合 ,为接受腔的个体化设计提供生物力学定量化依据。其临床应用将改善传统的设计流程 ,提高设计效率。同时 ,它也是未来构建接受腔设计专家 /智能系统的基础。
The functional performance of a lower - limb prosthesis and the patient's feeling are ultimately affected by socket design. Stress distribution on the interface between residual limb and socket is very important for socket design. This article aims at developing tools and techniques used to set up finite element model and stress analysis for personalized lower - limb prosthetic socket designing system. In the paper presented, a novel technique system, which can integrate FEA with current CAD/CAM systems, was developed to provide designers the stress distribution as a quantitative evaluation. This system is consisted of 3D visualization of stump/socket shape, finite element auto - meshing and stress analysis. The application of this system will improve the socket design.
出处
《中国生物医学工程学报》
EI
CAS
CSCD
北大核心
2004年第6期544-548,共5页
Chinese Journal of Biomedical Engineering
基金
国家自然科学基金资助项目 (3 0 3 70 3 76)
香港理工大学IGARD资助项目
关键词
假肢接受腔
生物力学评价
有限元
Biomechanics
Computer aided design
Computer aided manufacturing
Finite automata
Finite element method
Mathematical models
Stress analysis
Visualization
