3차원 해저지형 효과에 의한 초대형 부유체의 유탄성 거동특성

Abstract

The effects of three dimensional sea-bottom topography on the hydroelastic behavior of a Very Large Floating Structure(VLFS) are investigated experimentally and numerically. To calculate the sea-bottom effects more efficiently, finite-element method based on the variational method is used in fluid domain. Floating structure is modeled as a thin plate with uniform stiffness. The hydroelastic responses of the plate are analyzed by the mode superposition method. As a mode function, the Legendre polynomial is adopted as the mode function instead of well-known free-free beam mode function. A triangular sectioned sea-bottom with finite width is considered in the experimental and numerical study. Comparisons show a reasonably good agreement.