髋臼力和肌肉力对股骨有限元分析结果的影响

建立基于CT影像的股骨有限元模型,研究髋臼力和各个肌肉力对有限元分析结果的影响.对于完整股骨模型(模型I),施加髋臼力和各种肌肉力并计算.对于股骨近端模型(模型II),施加相同大小不同作用面积的髋臼力并计算.通过对计算结果的分析表明,臀中肌肌肉力对股骨内应力分布影响最大;髋臼力的作用面积越大,模型各单元应力越小,施加载荷位置的单元此趋势尤为明显.可以为大量个体化有限元计算预测股骨强度提供载荷简化的主要依据.

Effects of hip joint force and muscle forces on the results of finite element analysis of human femur

The aim of this paper was to investigate the effects of hip joint force and muscle forces on the finite element analysis results using CT-based finite element models of human femur.For the whole femur model(Model I),hip joint force and muscle forces were exerted.For the proximal femur model(Model II),the hip joint forces that had the same magnitude but different acting areas were exerted.The results show that the force of Gluteus medius has the greatest effect on the femur stress distribution,and when the hip joint forces that have the same magnitude but different acting areas were exerted,the larger the acting area,the smaller the von Mises stress magnitudes of the elements,and at the position of applied loads,this trend was particularly evident.This study is the basis for the simplification of the loadings in the prediction of femur strength using subject-specific finite element analysis.