Models and optimization frameworks for floating offshore windĪpplications and can be used to aid the development of guidanceĪnd standards for coupled floating offshore wind turbine models. The results inform the selection of simulation durations to be used in coupled aero-hydro Keywords: Semi-submersible platform hydrodynamic characteristics center of gravity broken mooring line naoe-FOAM-SJTU solver. Sweep, the paper establishes the impact of the simulation duration for this particular floating offshore wind turbine and characterizes the convergence properties of the loads and excursions asĪ function of the simulation duration. Wind speeds, sea states, and simulation durations. ConsideringĪn OC4 semi-submersible deployed with the NREL 5 MW turbine, the case study performs a parametric sweep over a range of The estimated fatigue and extreme loads experienced by a floating offshore wind turbine and its mooring system. The cable is hanging off a fixed point 20 m below sea surface, which corresponds to the draft of the OC4 semi-submersible test platform 13, more details to the platform later in section 4.1. The work analyses both operational and extreme cases, assessing The OrcaFlex base file used in the static simulations is depicted on Fig. This paper uses a coupled FAST-OrcaFlex model in order toĮxplore the impact of simulation duration on model convergence.
