Numerical Decay Test on a Novel Mass Damper for Suppressing Motion of Floating Offshore Wind Turbines

Tuned mass damper (TMD) is now increasingly considered for suppressing the motion of floating offshore wind turbines (FOWTs) and thus improving their power performance. This paper proposes a novel TMD adopting rotating plates. To evaluate the performance and effectiveness of the TMD, unsteady hydrodynamic simulations of the dynamics of FOWTs with or without TMDs are carried out using the computational fluid dynamics software STAR-CCM+. The prototype of the FOWT is taken as the FOWT model used in the FOWT comparative study in ISOPE-2023, which provides a reliable source of experimental data for validating the present numerical approach. From the comparison of results with and without the TMD, it is concluded that the proposed TMD adopting rotating plates can accelerate the decay process and thus improve the stability of the FOWT.