Collision simulations between a floating offshore wind turbine and a tanker considering ductile fracture and hydrodynamics of FOWT

초록

This paper intends to introduce the applicability of HydroQus to a problem of a tanker collision against a semi-submersible type floating offshore wind turbine (FOWT). HydroQus is a plug-in based on potential flow theory that generates interactive hydrodynamic forces in the commercial FEA code Abaqus/Explicit. Frequency response analyses were conducted for a 10MW capacity FOWT to obtain hydrostatic constants and hydrodynamic constants. The tanker was modeled with rigid elements, while elastic-plastic elements were used for the FOWT. Mooring chains were modeled to implement mooring force. As soon as a FEA is executed, HydroQus received displacements, velocities, and accelerations from FOWT’s COM from Abaqus/Explicit. Using these data, hydrostatic restoring forces, radiation forces, and wave excitation forces were generated at every time increment and returned them to Abaqus/Explicit. A hybrid failure strain model of Hosford-Coulomb (HC) & localized necking (LN), HC-LN model, was used to evaluate damage extent of the FOWT substructure. © 2024 The Author(s).