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초록· 키워드

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Soft tissue neck injury (STNI) is thought to he related to automotive seat characteristics, and it is important to know how the stiffness of the seathack and head restraint foam affect the occupant's motions in low speed rear impacts. The comhined MADYMO(MAthematical DYnamic MOdel, TNO) 50th percentile facet male human body model with a detailed neck model was selected for this analysis. In order to determine the relationship between the occupant's motions and seatback and head restraint foam stiffnesses, 40% offset rear impact simulations were performed by changing the stiffiness of seatback and head restraint. Simulated results show that the maximum acceleration of head and trunk would tend to increase with those stiffnesses. Increased stiffness of the seatback and head restraint resulted in increased ligament and disc forces. On the other hand a proper combination of seatback and head restraint stiffness can reduce a possible neck injury. It is clear that an appropriate combination of stiffnesses between seatback and head restraint allows to minimize a neck injury.

목차

1. Introduction
2. Modeling and Simulation
3. Results and Discussions
4. Conclusions
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