体衝突を想定した人頭部の振動解析

抄録

In this study, an average male human head model is created based on the Japanese Head Size Database 2001 and other publicly available data. Before reproducing the complex structure of the human head, a simplified model of the head including cerebral spinal fluid was created based on a sphere based on the dimensional information provided earlier. The resulting sagittal displacements of the cerebral and occipital centers were examined. We also created a model including the sternocleidomastoid muscle, which is thought to suppress sagittal motion, and compared the results with those of the previous study. The results showed that the rotation angle generated by the model did not change depending on the presence or absence of the muscles, but the radius of rotation decreased with the muscles. Furthermore, when the skull base was modeled, the vibration generated by the impact loading was consistent with the results of previous model experiments. The distribution of shear strain generated in the head was also examined, indicating that cerebrospinal fluid plays a role in cushioning the impact load applied to the cerebrum.