CAJ | 학술논문

目的建立正常人髋臼-软骨-股骨头三维有限元模型,为股骨头坏死的生物力学研究奠定基础.方法 ①选择1例健康志愿者,进行髋关节冠状MRI扫描,用MATLAB和ANSYS软件进行图像分析,建立正常人髋臼-软骨-股骨头三维几何模型.②分别对髋臼-软骨-股骨头几何模型的不同结构赋予相应的材料参数,并经ANSYS软件划分网格,建立髋臼-软骨-股骨头有限元模型.③在该模型上模拟人体站立状态,设置边界条件和加载条件,执行计算.与临床文献进行对照,验证模型的有效性.结果利用正常人髋关节MR影像,建立了髋臼-软骨-股骨头正交各向异性三维有限元模型,共89961个节点,448159个单元.计算结果最大位移发生在股骨头,最大应力发生在股骨颈.与文献及实际情况相吻合.结论基于髋关节MR影像的三维有限元模型几何相似性好,分析结果可信,所建立的髋臼-软骨-股骨头三维有限元模型可进行股骨头的生物力学研究.
목적 건립정상인관구-연골-고골두삼유유한원모형,위고골두배사적생물역학연구전정기출.방법 ①선택1례건강지원자,진행관관절관상MRI소묘,용MATLAB화ANSYS연건진행도상분석,건립정상인관구-연골-고골두삼유궤하모형.②분별대관구-연골-고골두궤하모형적불동결구부여상응적재료삼수,병경ANSYS연건화분망격,건립관구-연골-고골두유한원모형.③재해모형상모의인체참립상태,설치변계조건화가재조건,집행계산.여림상문헌진행대조,험증모형적유효성.결과 이용정상인관관절MR영상,건립료관구-연골-고골두정교각향이성삼유유한원모형,공89961개절점,448159개단원.계산결과최대위이발생재고골두,최대응력발생재고골경.여문헌급실제정황상문합.결론기우관관절MR영상적삼유유한원모형궤하상사성호,분석결과가신,소건립적관구-연골-고골두삼유유한원모형가진행고골두적생물역학연구.
Objective To set up the 3D-finite element(FE)model of normal acetabulum-cartilage-femoral head,so that to provide an effective model for biomechanical analysis of femoral head.Methods(1)The hip joint in one healthy adult male volunteer was scanned by MRI at coronal section.The 3D reconstruction model of acetabulum-cartilage-femoral head was constructed with MATLAB and ANSYS software.(2)The 3D orthotropy finite element model of the acetabulum-cartilage-femoral head was constructed by givig the corresponding material parameters to the different structures of the model of acetabulum-cartilage-femoral head and divided into networks through ANSYS software.(3)The standing status was imitated on the model to set boundary condition and loading and then calculated.The effect of the model was evaluated in comparison with that of literature.Results A 3D orthotropy FE model of acetabulum-cartilage-femoral head was established successfully,including 89 961 points of 448 159 units.The maximal displacement was on the femoral head,and the maximal Von Mises stress was on the femur neck.The stress analysis was the same as the results of literature and the actuality.Conclusion A 3D orthotropy FE model of acetabulum-cartilage-femoral head can be setup based on MRI images,which can provide a reasonable and effective model for biomechamical analysis of femoral head.