日本機械学会論文集
Online ISSN : 2187-9761
ISSN-L : 2187-9761
生体工学,医工学,スポーツ工学,人間工学
頭頚部・有限要素モデルを用いたむち打ち傷害発生メカニズムの解明(後突時の頭頚部・初期挙動再現のための要因検討)
長谷川 純爾中楯 浩康青村 茂
著者情報
ジャーナル フリー

2018 年 84 巻 865 号 p. 18-00184

詳細
抄録

The number of whiplash injuries worldwide is at a high level. From the mid-1990s, many researchers have focused into the head-neck S-shaped mode deformation behavior in early rear impacts. Firstly we developed a Japanese male 50th%ile size head-neck FE model, so we attempt to reproduce the same mode in head-neck behaviors in the rear impact sled tests of male subjects. This model has not only the main ligament tissues, but also nearly 40 major muscles such as the sternocleidomastoid muscle, the hyoid muscles, and the erector spinae muscles. Using DOE (Design of Experiments), we analyzed the percent contribution of neck muscles in the relaxed state under 1G, when holding the head neutral posture before rear impact and the muscle force balance was obtained based on the regression equation. Then, we carried out the rear impact simulation using same muscle strength, the results were compared with the head-neck behaviors of male subjects in rear sled impact tests. By balancing the muscular strength before the impact, it found out that the S-shaped mode deformation could be reproduced. This mode is strongly influenced by the muscle force balance, it has little influence on the head maximum rotational angle which occurred in the late rear impact. On the contrary, the muscular strength-up, which is reflexed on muscles such as sternocleidomastoid muscle and hyoid muscle after the impact, has little influence on the S-mode. We introduced an index (S - θmax) to quantify the S - shaped mode deformation, and confirmed that there is a possible correlation between the index value and the muscle strength for holding the head posture. Finally, we investigated the relationship between individual T1 conditions and S - θmax, so we also report these results.

著者関連情報
© 2018 一般社団法人日本機械学会
前の記事 次の記事
feedback
Top