Fatigue loading on a 5MW offshore wind turbine due to the combined action of waves and current

Peeringa, J.M.

doi:10.1088/1742-6596/524/1/012093

Cited by 5 publications

(7 citation statements)

References 4 publications

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“…The preceding equation applies in determining the spectral amplitudes for the frequency region whenever S ER ( ω ,U) is less than S( ω ,U). Subsequently, variations of the spectra corresponding to flow velocity and acceleration induced by the underlying current can be determined, and some illustrations can be found in Peeringa and Soares and de Pablo…”

Section: Wave‐current Interaction Modelsmentioning

confidence: 99%

“…The interaction between wave and current is known for decades, and its significant impact on offshore structures was observed in practice . In particular, numerical analysis on a fixed‐bottom offshore wind turbine highlighted the importance of the wave‐current interactions on the fatigue loading . For FOWTs in deep water, the wave‐current interactions can be more pronounced as the current effect on the mooring system could be considerable because of the large length of the submerged cables.…”

Section: Introductionmentioning

confidence: 99%

“…() For ocean renewable energy application, they have been used for studying the performance of marine current turbines,() and the result was found to be consistent with experimental results . This analytical model has been also used in fatigue loading analysis of offshore wind turbines considering the wave‐current interaction where a fixed‐bottom wind turbine was studied. In a recent study, the authors have used the wave‐current model to study its effect on the fatigue life of an FOWT; however, a detailed analysis of the wave‐current interaction on structural responses of FOWT is still absent.…”

Section: Introductionmentioning

confidence: 99%

“…12 In particular, numerical analysis on a fixed-bottom offshore wind turbine highlighted the importance of the wave-current interactions on the fatigue loading. 13 For FOWTs in deep water, the wave-current interactions can be more pronounced as the current effect on the mooring system could be considerable because of the large length of the submerged cables. In addition, the restoring stiffness of FOWTs in horizontal directions is solely provided by the mooring system and is generally small.…”

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confidence: 99%

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Wave‐current interaction effects on structural responses of floating offshore wind turbines

Chen

Basu

2018

Wind Energy

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This paper proposes a model considering the wave‐current interactions in dynamic analyses of floating offshore wind turbines (FOWTs) and investigates the interaction effects on the FOWT responses. Waves when traveling on current are affected by the current, leading to frequency shift and shape modification. To include such interactions in FOWT analysis, which has not been considered by the researchers till date, a nonlinear hydrodynamic model for multicable mooring systems is presented that is able to consider the cable geometric nonlinearity, seabed contact, and the current effect. The mooring model is then coupled with a spar‐type FOWT model that handles the structural dynamics of turbine blades and tower, aerodynamics of the wind‐blade interaction, and wave‐current effects on the spar. The analytical wave‐current interaction model based on Airy theory considering the current effect is used in the computation of flow velocity and acceleration. Numerical studies are then carried out based on the NREL offshore 5‐MW baseline wind turbine supported on top of the OC3‐Hywind spar buoy. Two cases, (1) when the currents are favorable and (2) when the currents are adverse, are examined. Differences of up to 15% have been observed by comparing the cable fairlead tension obtained excluding and including the wave‐current interactions. In particular, when irregular waves interact with adverse current, a simple superposition treatment of the wave and the current effects seems to underestimate the spar motion and the cable fairlead tension. This indicates that the wave‐current interaction is an important aspect and is needed to be considered in FOWT analysis.

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Section: Wave‐current Interaction Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Wave‐current interaction effects on structural responses of floating offshore wind turbines

Chen

Basu

2018

Wind Energy

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“…are required [17]. Aerodynamic loads like wind speed, wind direction and shear, seismic load, as well as the climate impacts resulting from ice, snow, humidity, air density, and thermal loads, are reflected in structural loads of both offshore and onshore WT systems.…”

Section: Wind Turbine Inflow Conditionsmentioning

confidence: 99%