Study on hydroelastic response of box-shaped very large floating structure in regular waves

Three dimensional linear hydroelasticity theory is applied to investigate the dynamic response of a box-shaped very large floating structure (VLFS) in regular sinusoidal waves in this paper. The analytical method of Bernoulli-Euler beam is used to describe the dynamic characteristics of the structure in vacuum, while the three dimensional potential theory of flexible body is employed to calculate the hydrodynamic cofficients. The amplitudes of rigid body motions in regular waves are compared with that worked out by DNV/WADAM programme. The dynamic displacements and bending moments of the vertical bending mode are presented with respect to wave length. No significant resonance of the low flexible body modes is found due to the coupling of the responses among these modes and the rigid body modes.