Nonlinear Hydroelastic Waves in Deep Water

Abstract

This paper investigates the hydroelastic interaction between nonlinear regular waves and a thin elastic plate floating on deep water. A two-way fluid-structure interaction (FSI) framework, previously developed by the authors by coupling computational fluid dynamics (CFD) and finite element analysis (FEA), is employed to reproduce nonlinear hydroelastic wave responses. To account for the high structural flexibility and to improve computational efficiency, a Laplace matrix scheme is newly incorporated into the framework. The numerical results are validated against experimental data and analytical solutions reported in earlier studies by some of the present authors. The simulations reveal nonlinear wave profiles characterized by a steepened crest and a flattened trough, as well as their inverted counterparts, across different incident-wave frequency regimes. In the inverted-wave regime, a transition in wave profile is observed during propagation: the response shifts from an elevated form on the weatherside to a depressed form near the mid-plate region.