一种无创可延长假体的延长结构应力分析与优化  

Stress analysis and optimization of the extension structure of a noninvasive extendable prosthesis

作　　者：张立争 张劼 叶萍[1] 常兆华[1,2] ZHANG Lizheng;ZHANG Jie;YE Ping;CHANG Zhaohua(Shanghai Institute for Minimally Invasive Therapy,School of Medical Instrument and Food Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Microport Medical(Group) Co.,Ltd.,Shanghai 201203)

机构地区：[1]上海理工大学医疗器械与食品学院教育部微创医疗器械工程中心,上海200093 [2]上海微创医疗器械(集团)有限公司,上海201203

出　　处：《生物医学工程研究》2019年第1期76-80,共5页Journal Of Biomedical Engineering Research

基　　金：上海市科委科研项目(15441903000)

摘　　要：介绍一种新型无创可延长假体的延长结构,并对延长结构做应力分析和优化。利用三维设计软件PRO/E(PTC公司,美国)建立具有不同规格延长结构的三维模型;通过有限元方法分析得出优化的延长结构,并用物理实验验证。研究表明,延长结构的最大负载能力主要取决于聚缩醛(polyoxymethylene,POM)材料制成的限动管,仿真与物理实验结果所呈现的不同规格延长结构的静态力变化趋势基本一致;对于本研究的多种延长结构来说,移动管凸起的外径φ为19 mm、凸起角度γ为15°至45°之间最佳。因此,本研究提出的延长结构设计原则以及分析与验证结果,为新型无创可延长假体深入研究奠定了良好的理论基础。To design a new extension structure of the noninvasive extendable prosthesis,to analyze and optimize the stress of the extension structure.The three-dimensional model of the different specifications extension structure was established by using the Pro/Engineer software(PTC,USA).The optimal extension structure was obtained by finite element method analysis and physical experiment verification.This study showed that the maximum load capacity of the extended structure depended on the control tube made of POM(Polyoxymethylene).The simulation and physical experiment results revealed that the static force change trend of the different specifications extension structure was similar.The diameter(φ)of mobile tube bulge was 19 mm and the convex angle(γ)between 15°and 45°was best for a variety of extension structure.Therefore,the extension structure design,analysis and verification results of this study have laid a good theoretical foundation for the new noninvasive extension prosthesis.

关 键 词：无创 可延长假体 延长结构 有限元分析 聚缩醛 

分 类 号：R318[医药卫生—生物医学工程] TP202[医药卫生—基础医学]