Hydrodynamic analysis of a semi-submersible floating wind turbine. numerical validation of a second order coupled analysis

Abstract

This work presents a comprehensive computational hydrodynamic analysis of a semisubmersible offshore wind turbine. The studied case is based on a three floater wind turbine designed for a 1.5 MW turbine. The analysis is supported by experimental tests and it is focused on the second-order response of the platform, including mooring effects. The different analysis carried out include decay test, regular waves and bichromatic waves. Numerical simulations are performed in time-domain using the computational model implemented in the SeaFEM solver. The analysis of the obtained results includes the comparison of the numerical and experimen- tal response of the platform. Special attention is paid to the second-order effects in the dynamic response of the system.