Floating wind turbines(FWTs) are subjected to combined aerodynamic and hydrodynamic loads varying both in time and amplitude. In this study, a multi-column tension-leg-type FWT(i.e., Wind Star TLP system) is investiga...Floating wind turbines(FWTs) are subjected to combined aerodynamic and hydrodynamic loads varying both in time and amplitude. In this study, a multi-column tension-leg-type FWT(i.e., Wind Star TLP system) is investigated for its global performance under normal operating conditions and when parked. The selected variables are analysed using a fully coupled aero-hydro-servo-elastic time domain simulation tool FAST.Three different loading scenarios(wind only, wave only and both combined) are examined to identify the dominant load influencing each response. The key response variables are obtained and compared with those for an NREL5 MW baseline wind turbine installed on land. The results should aid the detailed design of the Wind Star TLP system.展开更多
A 6 MW spar-type floating offshore wind turbine(FOWT) model is put forward and a fully coupled aero-hydro-servo-elastic time domain model is established in the fatigue,aerodynamics,structures and turbulence(FAST) code...A 6 MW spar-type floating offshore wind turbine(FOWT) model is put forward and a fully coupled aero-hydro-servo-elastic time domain model is established in the fatigue,aerodynamics,structures and turbulence(FAST) code.Influence rules of wind load and wave load on the characteristics of 6 MW spar-type FOWT are investigated.Firstly,validation of the model is carried out and a satisfactory result is obtained.The maximal deviations of rotor thrust and power between simulation results and reference values are 4.54% and-2.74%,respectively.Then the characteristics,including rotor thrust,rotor power,out-of-plane blade deflection,tower base fore-aft bending moment,and mooring line tension,are researched.The results illustrate that the mean value of dynamic response characteristics is mainly controlled by the wind-induced action.For characteristics of tower base fore-aft bending moment and platform pitch motion,the oscillation is dominated by the wave-induced action during all conditions considered.For characteristics of out-of-plane blade tip deflection and mooring line tension,the oscillation is commanded by combination effect of wave and wind loads when the wind speed is lower than the rated wind speed(hereinafter referred to as below rated wind speed) and is controlled by the wave-induced action when the wind speed is higher than the rated wind speed(hereinafter referred to as above rated wind speed).As to the rotor thrust and power,the oscillation is dominated by the wind induced action at below rated wind speed and by the combination action of wind and wave loads at above rated wind speed.The results should be useful to the detailed design and model basin test of the 6 MW spar-type FOWT.展开更多
基金the National Basic Research Program(973)of China(No.2014CB046205)
文摘Floating wind turbines(FWTs) are subjected to combined aerodynamic and hydrodynamic loads varying both in time and amplitude. In this study, a multi-column tension-leg-type FWT(i.e., Wind Star TLP system) is investigated for its global performance under normal operating conditions and when parked. The selected variables are analysed using a fully coupled aero-hydro-servo-elastic time domain simulation tool FAST.Three different loading scenarios(wind only, wave only and both combined) are examined to identify the dominant load influencing each response. The key response variables are obtained and compared with those for an NREL5 MW baseline wind turbine installed on land. The results should aid the detailed design of the Wind Star TLP system.
基金the National Basic Research Program(973) of China(No.2014CB046205)
文摘A 6 MW spar-type floating offshore wind turbine(FOWT) model is put forward and a fully coupled aero-hydro-servo-elastic time domain model is established in the fatigue,aerodynamics,structures and turbulence(FAST) code.Influence rules of wind load and wave load on the characteristics of 6 MW spar-type FOWT are investigated.Firstly,validation of the model is carried out and a satisfactory result is obtained.The maximal deviations of rotor thrust and power between simulation results and reference values are 4.54% and-2.74%,respectively.Then the characteristics,including rotor thrust,rotor power,out-of-plane blade deflection,tower base fore-aft bending moment,and mooring line tension,are researched.The results illustrate that the mean value of dynamic response characteristics is mainly controlled by the wind-induced action.For characteristics of tower base fore-aft bending moment and platform pitch motion,the oscillation is dominated by the wave-induced action during all conditions considered.For characteristics of out-of-plane blade tip deflection and mooring line tension,the oscillation is commanded by combination effect of wave and wind loads when the wind speed is lower than the rated wind speed(hereinafter referred to as below rated wind speed) and is controlled by the wave-induced action when the wind speed is higher than the rated wind speed(hereinafter referred to as above rated wind speed).As to the rotor thrust and power,the oscillation is dominated by the wind induced action at below rated wind speed and by the combination action of wind and wave loads at above rated wind speed.The results should be useful to the detailed design and model basin test of the 6 MW spar-type FOWT.
