生体内けい骨の動特性とモデル化に関する研究

概要

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A three-dimensional FEM analysis and human in-vivo tibia experiment were carried out for the diagnosis of bone diseases such as osteoporosis by using vibration. The natural frequency and the equivalent stiffness, which are obtained by circle fitting of the mobility transfer function of in-vivo tibia, were used as evaluation parameters for the diagnosis. The results of the osteoporosis simulation by FEM showed that the stiffness is more sensitive to the change in the bone physical property than the natural frequency. The transfer function of in-vivo tibia was measured for 155 men and women by random excitation. Both the natural frequency and the stiffness, which are normalized by the length of the tibia, decreased with aging on average, with the stiffness showing the more marked trend. In women, these evaluation parameters showed lower values throughout the age range than those of men, and the stiffness reduction with aging was larger.
社団法人日本機械学会の論文
1995-08-25