모드 중첩법에 의한 초대형 부유 구조물의 유탄성 거동해석법에 대한 고찰

Abstract

Importance of consideration on the hydroelastic response is well recognized in design of Very Large Floating Structure(VLFS). Practically, the accurate estimation on the structural stresses as well as the deformation of VLFS is important in hydroelastic analysis in order to insure structural integrity and operational effectiveness. Mode superposition method is one of the well-known hydroelastic analysis method. The free-free beam mode has been generally applied as the mode function. In this paper, it is shown that use of the free-free beam mode produces an inaccurate solution in the stress level. Instead of using the free-free beam mode, a set of general orthogonal function combined with finite element method is applied and the accuracy of hydroelastic analysis up to stress level is compared.