Wet-Mode Superposition for Evaluating the Hydroelastic Response of Floating Structures with Arbitrary Shape

摘要

The hydroelastic response analysis of large floating structures is formulated by a wet-mode superposition approach. The floating structure is discretized by finite elements (FE), whereas fluid domain by boundary elements (BE). Structural analysis is based on the Mindlin's plate theory. Only the structure-fluid interface is discretized in the fluid domain. The equation of motion is constructed by coupling BE and FE on the fluid-structure interface. Quadratic isoparametric elements are used for both FE and BE. The accuracy and effectiveness of the BE-FE hybrid model and wet-mode approach are verified by comparing with published experimental results on the hydroelastic response of a rectangular floating structure for a wide variety of incident wavelengths and angles. Moreover, the hydroelastic response of floating structures with arbitrary shape is investigated to discuss on the local deformation of convex parts.