COUPLED FREE VIBRATIONAL CHARACTERISTICS OF ARTIFICIAL FLOATING ISLANDS : Fluid-structure interaction analysis of floating elastic circular plate Part 1

Abstract

Coupled free vibrational characteristics of the large-scaled circular island which is floating on the sea of finite depth and anchored by tension-legs to the seabed are investigated. Hydrodynamic pressure acting on the wetted surface of the island is obtained in closed form oh the basis of a linear potential flow theory. The frequency equation governing the motion of the island-anchorwater coupled system is derived and solved by Rayleigh-Ritz method. Numerical examples are presented to illustrate the variation in coupled free vibrational characteristics due to the,island thickness, water depth and anchor arrangement and stiffness.