[SAFETY 부문] 충돌문제에 MDO를 적용하기 위한 시스템해석

Multidisciplinary design optimization (MDO) technology has been proposed and applied to solve optimization problems where multiple disciplines are coupled. A large system is decomposed into a set of smaller subsystems according to the related disciplines. Mostly, the MDO technology has been applied to aircraft wing design problems. In this research, an MDO problem is defined for the automobile design which has crashworthiness analyses. Belt integrated seat (BIS) is selected as a practical example. The design of BIS has two disciplines of crashworthiness based on nonlinear finite element analysis and occupant analysis based on multi-body dynamics. The problem is formulated for concurrent subs pace optimization (CSSO) which is one of the well defined MDO solution paradigms. System analysis in CSSO is very important in that the coupling between disciplines is solved through the system analysis. System analysis is conducted for the BIS design. Response surface method (RSM) is employed to solve the system analysis because involved disciplines are too complicated to use the mathematical optimization. That is, the coupling variables are found by minimizing the discrepancy between the two disciplines. The performance of the system is evaluated and the full application of MDO technology to BIS is discussed.