해저면을 고려한 초대형 부유체의 유탄성 거동 특성에 대한 수치적 실험적 고찰

Abstract

In this study, the influences of sea-bottom topography on the hydroelastic behavior of a Very Large Floating Structures(VLFS) are investigated experimentally and numerically. The finite-element method based on the variational method is used in fluid domain in order to calculate the sea-bottom effects more rigorously. Floating structure is modeled as a thin plate with uniform stiffness. The hydroelastic responses of pontoon-type VLFS are analyzed by the mode superposition. To enhance the satisfaction of shear and moment free condition a set of orthogonal function is adopted as the mode function instead of well-known free-free beam mode function. Flat and step-shaped sea-bottoms are considered in the experimental and numerical study.