摘要
目的:构建并验证足踝部三维有限元仿真模型,为足踝部生物力学研究提供可靠的数字化平台。方法:获取健康受试者的右下肢CT与踝关节MRI数据,综合应用Mimics、Solid Works以及Hyper Mesh三个软件构建3D渲染模型、实体模型以及有限元模型,在ABAQUS软件中对标准站立中期进行仿真分析,与相关文献对比验证模型的有效性。结果:整个模型共由205 203个单元和48 748个节点组成,包含了30块骨骼、113条韧带、各关节软骨以及外围软组织。仿真分析结果:足底压力峰值为0.35MPa,跖骨应力峰值为8.90MPa,距骨、跟骨、骰骨以及舟骨等的应力峰值分别为5.72MPa、7.63MPa、4.79MPa、5.40MPa。分析结果与相关文献数据基本一致。结论:本模型具有良好的生物相似性,各组织结构在仿真分析中均能很好的发挥各自的功能,其有效性得到充分验证,可作为足踝部生物力学研究、模拟各种足踝部损伤以及内固定术式的可靠数字化平台。
Objective： To construct and verify the 3D finite element simulation model of ankle and foot so as to provide a reliable digital platform for biomechanical studies on ankle and foot. Methods： Collect CT scans of right lower extremity and MRI data on ankle joints from healthy subjects, construct 3D rendering model, entity model and finite element model with three software namely Mimics, SolidWorks and HyperMesh, conduct simulation analysis on standard mid-stance in ABAQUS and then compare the validity of the verification model with those in relevant literatures. Results： The whole model consists of 205,203 units and 48,748 nodes, including 30 bones, 113 ligaments and cartilages as well as peripheral soft tissues of the joints. Simulation analysis results： peak value of planta pressure： 0.35 MPa; peak value of metatarsal stress： 8.90MPa; peak value of talus, calcaneus, cuboid and navicular stresses： 5.72MPa, 7.63 MPa, 4.79MPa, 5.40MPa respectively. These analysis results are basically in line with corresponding literature data. Conclusion： There are good biological similarities in the model and all the tissue structures can perform their functions well in the simulation analysis. Its effectiveness is verified so fully that it can serve as a reliable digital platform for biomechanical studies on ankle and foot, simulation of various foot and ankle injuries and internal fixation.
出处
《中国数字医学》
2016年第4期83-86,共4页
China Digital Medicine
关键词
足踝部
有限元分析
生物力学
标准站立中期
foot and ankle, finite element analysis, Biomechanics, standard mid-stance
