人体足部三维有限元模型的有效构建方法及其合理性的实验分析研究  

Valid Constructing Method of Three-dimensional Finite Element Human Foot Model and Experimental Analysis on Its Rationality

作　　者：牛文鑫[1] 杨云峰[2] 俞光荣[2] 丁祖泉[1] 

机构地区：[1]同济大学生命科学与技术学院生物医学工程研究所,上海200092 [2]同济大学附属同济医院骨科,上海200065

出　　处：《生物医学工程学杂志》2009年第1期80-84,共5页Journal of Biomedical Engineering

基　　金：国家自然科学基金资助项目(30640058)

摘　　要：为建立足踝生物力学数字仿真研究平台,应用逆向工程原理,通过对序列螺旋CT图片处理建立足部三维实体模型,然后对其进行有限元网格划分。关节软骨、韧带、肌腱和足底软组织的建模过程参考了大量解剖数据和标本实验结果,并巧妙地利用杆单元和壳单元使模型得到合理简化,又逼近生理状态。为验证模型的有效性,对7具新鲜离体标本进行实验,在电子万能试验机加载条件下,用数字散斑相关法测量位移。实验结果充分论证了模型的有效性和临床应用安全性。在与实验比较和相互比较的基础上,本文还证明跖筋膜末端联接在跖骨头上的模型更具合理性。To provide a digital simulation platform for foot-ankle biomechanics research, a 3-D finite element model was established through helical CT images under the principle of RE（reverse engineering） and meshed in FEM software. In the process of modeling cartilage, ligaments, tendons and plantar soft tissue, many anatomic data and results of cadaver specimen experiment were referenced; LINE elements and SHELL elements were used skillfully to simplify the model and resemble the physiological state. The model was then validated by specimen experimentation, which was done on seven fresh cadaver foot specimens, and digital speckle correlation method （DSCM） was used to measure their displacements. Upon the comparison with experimentation and others models, this study also testified that the model, of which the plantar fascia is linked to the heads of metatarsus, is more reasonable to clinical application.

关 键 词：足 有限元模型 标本实验 生物力学 

分 类 号：R318.01[医药卫生—生物医学工程]