시뮬레이션을 이용한 뒷좌석 여성 탑승자 상해 감소를 위한 로드리미터와 프리텐셔너 최적화 연구

The restraint systems on the front seats of automobiles have been continuously improved in recent years. Thus, the front seats consist of a safety belt with a pretensioner and load limiter to decrease rear passenger"s injuries on frontal crash. In rear seats, however, there is a lack of restraint systems as a pretensioner and load limiter as well as rear seat occupant"s injury is higher than the front seat occupant"s according to the study result for safety. In this study, the load-limiter and pretensioner were modeled to to improve injury severity for rear seat female occupant using the simulation techniques. The design parameters were chosen a pretensioner and load limiter : Load limiter force, pretensioner TTF(Time to Fire), pretensioner inlet. Then, the design variables were optimized using the design of experiment method and Injury assessment method used joint probability of injury in USNCAP. This study investigated the correlation between joint probability of injury and the design variables and minimized injury criteria through various method and the design of restraint systems.