Dynamic Response of SPAR-Type Floating Offshore Wind Turbine under Wave Group Scenarios

Dynamic Response of SPAR-Type Floating Offshore Wind Turbine under Wave Group Scenarios

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Numerical simulations are performed within the time domain to investigate the dynamic behaviors of an SPAR-type FOWT under wave group conditions.Towards this goal, the OC3 Hywind SPAR-type FOWT is adopted, and a JONSWAP (Joint North Sea Wave Project)-based wave group is generated by the envelope amplitude approach.The FOWT motion under wave group conditions, as well as the aerodynamic, hydrodynamic, and mooring performances, is simulated by our sherri hill dress 53129 established in-house code.

The rotating blades are modelled by the blade element momentum theory.The wave-body interaction effect is calculated by the three-dimensional potential theory.The mooring dynamics are also taken into consideration.

According to the numerical results, the SPAR buoy motions are slightly increased by the wave group, while the heave motion is significantly amplified.Both the aerodynamic performance and the mooring tension are also influenced by the wave group.Furthermore, the low-frequency resonant response could be more easily excited almanac sunshine and opportunity by the wave group.