Recently the incidence of rollover accidents has increased due to the increase of SUV, and the probability of occupant injury in rollover accidents is very high, so research is needed accordingly. In this study, PC-CRASH, which is a program used for traffic accident analysis, is used for checking rollover speed and rollover angle of each situation in case of rollover accident, and applied to design variables of LS-DYNA which is finite element analysis program, so deformation displacements of roof according to collision velocity and angle were derived. Also, it is possible to predict rollover vehicle speed by using the derived value and the measured deformation displacement of roof in actual rollover accident, and it is possible to reconstruct accident more accurately by applying to PC-Crash which is traffic accident reconstruction program, so it is thought that it can be utilized analyzing traffic accident usefully.

ABSTRACT
 1. 서론
 2. 관련법규 및 모델해석
  2.1 천정강도시험
  2.2 차량모델
  2.3 Roof Crush 법규의 해석
 3. 결과 및 고찰
  3.1 충돌인자에 따른 Roof Crush 특성
  3.2 파손부위의 시뮬레이션 결과
  3.3 천정강도의 신뢰성 검증
 4. 결론
 References

• 최용순(Gachon-Samsong Automotive Research Center) | Yong-Soon Choi
• 김천호(Gachon-Samsong Automotive Research Center) | Chon-Ho Kim
• 김성호(Gachon-Samsong Automotive Research Center) | Seong-Ho Kim
• 윤준규(Department of Mechanical Engineering, Gachon University) | Jun-Kyu Yoon Corresponding Author