在前期有限元建模研究的基础上,本研究以男性标准脚为对象,用Solidworks建立足部和压力板模型,然后导入到Ansys Workbench,在对足部模型进行相关力学假设的基础上,对其进行静态力学分析,得到了足底应力分布。用Footscan7 USB gait足底...在前期有限元建模研究的基础上,本研究以男性标准脚为对象,用Solidworks建立足部和压力板模型,然后导入到Ansys Workbench,在对足部模型进行相关力学假设的基础上,对其进行静态力学分析,得到了足底应力分布。用Footscan7 USB gait足底压力测试系统进行了实体测试,对本研究所提出的有限元建模方法及静态力学分析的有效性和可行性加以验证。结果表明,本研究所提出的有限元建模方法是可行的,静态力学分析结果是有效的。展开更多
本文探索采用体感设备Kinect,结合visual studio C++开发SLAM图形建模,使用Kinect传感设备对足部进行扫描,实现对足部的数据搜集,并利用SLAM软件对图像进行点云的拼接、曲面的重建新从而构建出足部三维模型,让人们能使用价格较低的Kinec...本文探索采用体感设备Kinect,结合visual studio C++开发SLAM图形建模,使用Kinect传感设备对足部进行扫描,实现对足部的数据搜集,并利用SLAM软件对图像进行点云的拼接、曲面的重建新从而构建出足部三维模型,让人们能使用价格较低的Kinect装置就可以简便精确的获得足部三维模型。展开更多
The majority of foot deformities are related to arch collapse or instability,especially the longitudinal arch.Although the relationship between the plantar fascia and arch height has been previously investigated,the s...The majority of foot deformities are related to arch collapse or instability,especially the longitudinal arch.Although the relationship between the plantar fascia and arch height has been previously investigated,the stress distribution remains unclear.The aim of this study was to explore the role of the plantar ligaments in foot arch biomechanics.We constructed a geometrical detailed three-dimensional (3-D) finite element (FE) model of the human foot and ankle from computer tomography images.The model comprised the majority of joints in the foot as well as bone segments,major ligaments,and plantar soft tissue.Release of the plantar fascia and other ligaments was simulated to evaluate the corresponding biomechanical effects on load distribution of the bony and ligamentous structures.These intrinsic ligaments of the foot arch were sectioned to simulate different pathologic situations of injury to the plantar ligaments,and to explore bone segment displacement and stress distribution.The validity of the 3-D FE model was verified by comparing results with experimentally measured data via the displacement and von Mise stress of each bone segment.Plantar fascia release decreased arch height,but did not cause total collapse of the foot arch.The longitudinal foot arch was lost when all the four major plantar ligaments were sectioned simultaneously.Plantar fascia release was compromised by increased strain applied to the plantar ligaments and intensified stress in the midfoot and metatarsal bones.Load redistribution among the centralized metatarsal bones and focal stress relief at the calcaneal insertion were predicted.The 3-D FE model indicated that plantar fascia release may provide relief of focal stress and associated heel pain.However,these operative procedures may pose a risk to arch stability and clinically may produce dorsolateral midfoot pain.The initial strategy for treating plantar fasciitis should be non-operative.展开更多
文摘在前期有限元建模研究的基础上,本研究以男性标准脚为对象,用Solidworks建立足部和压力板模型,然后导入到Ansys Workbench,在对足部模型进行相关力学假设的基础上,对其进行静态力学分析,得到了足底应力分布。用Footscan7 USB gait足底压力测试系统进行了实体测试,对本研究所提出的有限元建模方法及静态力学分析的有效性和可行性加以验证。结果表明,本研究所提出的有限元建模方法是可行的,静态力学分析结果是有效的。
文摘本文探索采用体感设备Kinect,结合visual studio C++开发SLAM图形建模,使用Kinect传感设备对足部进行扫描,实现对足部的数据搜集,并利用SLAM软件对图像进行点云的拼接、曲面的重建新从而构建出足部三维模型,让人们能使用价格较低的Kinect装置就可以简便精确的获得足部三维模型。
基金supported by the National Natural Science Foundation of China(Grant No. 30801163)
文摘The majority of foot deformities are related to arch collapse or instability,especially the longitudinal arch.Although the relationship between the plantar fascia and arch height has been previously investigated,the stress distribution remains unclear.The aim of this study was to explore the role of the plantar ligaments in foot arch biomechanics.We constructed a geometrical detailed three-dimensional (3-D) finite element (FE) model of the human foot and ankle from computer tomography images.The model comprised the majority of joints in the foot as well as bone segments,major ligaments,and plantar soft tissue.Release of the plantar fascia and other ligaments was simulated to evaluate the corresponding biomechanical effects on load distribution of the bony and ligamentous structures.These intrinsic ligaments of the foot arch were sectioned to simulate different pathologic situations of injury to the plantar ligaments,and to explore bone segment displacement and stress distribution.The validity of the 3-D FE model was verified by comparing results with experimentally measured data via the displacement and von Mise stress of each bone segment.Plantar fascia release decreased arch height,but did not cause total collapse of the foot arch.The longitudinal foot arch was lost when all the four major plantar ligaments were sectioned simultaneously.Plantar fascia release was compromised by increased strain applied to the plantar ligaments and intensified stress in the midfoot and metatarsal bones.Load redistribution among the centralized metatarsal bones and focal stress relief at the calcaneal insertion were predicted.The 3-D FE model indicated that plantar fascia release may provide relief of focal stress and associated heel pain.However,these operative procedures may pose a risk to arch stability and clinically may produce dorsolateral midfoot pain.The initial strategy for treating plantar fasciitis should be non-operative.
