북미 IIHS의 천정강도 개선을 위한 차체구조 특성 연구

Recently, the interest in vehicle safety is increasing, so engineers continuously work on reducing occupant injuries from the frontal, side, rear crash as well as roll over crash. In related to roll over crush, National Highway Traffic Safety Administration (NHTSA) issued Notice of Proposed Rulemaking (NPRM) enhancing the safety standard on roof crush resistance, FMVSS No. 216 is amending some part of the test procedure. Also, in order to nominate a vehicle for the Top Safety Pick award in Insurance Institute for Highway Safety (IIHS), the vehicle must have good ratings in all four Institute tests. In case of roof crush resistance test, strength to weight ratio (SWR) of 4.0 times must measured within 5 inches of plate displacement to obtain good rating. CAE simulation has become a useful tool to optimize the roof structure. This paper shows the correlated CAE results with a physical test. And the improvement of Roof Crush resistance is conducted by using correlated CAE model.