A 6MW 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 6MW 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 6MW spar-type FOWT.
MENG Long (孟龙), HE Yanping (何炎平), ZHOU Tao (周涛), ZHAO Yongsheng (赵永生), LIU Yadong (刘亚东)
. Research on Dynamic Response Characteristics of 6MW Spar-Type Floating Offshore Wind Turbine[J]. Journal of Shanghai Jiaotong University(Science), 2018
, 23(4)
: 505
.
DOI: 10.1007/s12204-018-1972-3
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