個体別デジタル・モデルによる自動車事故における乗員の脳応答個体差の解析(<特集>D & D 2007)

概要

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In order to investigate the effects of individual body shape differences on brain injury occurring in traffic accidents, we created hybrid-models for representative bodies or head shapes in Japanese male, which consist of multi-body models for full-body and head FE models. Firstly, traffic accident simulations were carried out by using five multi-body models of the full-body, which are average, small, large, skinny and fat body shapes in Japanese male. The multi-body models were constructed using only body height and weight data, which can be easily measured and obtained. The constructed individual body shape can have smooth outer shape by using shape transformation method combining scaling with skinning deformation. The simulation results showed that individual differences in full-body affect the occupant dynamics, compared to other factors such as seat position, belt position and body posture. Next, the rigid body motions of the heads obtained in the simulations were applied to the head FE models having boundary shapes in distribution of head shapes in Japanese male. The head FE models were created using Multi Dimensional Scaling (MDS) and Free Form Deformation (FFD). The results showed that individual differences in head shape influence stress distribution in the intracranial space greatly.
2008-05-25