Impact of Typhoons on Floating Offshore Wind Turbines: A Case Study of Typhoon Mangkhut

Li, Jiawen; Bian, Jingyu; Ma, Yuxiang; Jiang, Yichen

doi:10.3390/jmse9050543

Cited by 14 publications

(7 citation statements)

References 27 publications

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“…This WSD, shown in Table 7, is based on 10 years of data from the Wangdolcho meteorological observation buoy, which is near Ulsan offshore. The long-term accelerations corresponding to 4 return periods of 1, 10, 50, and 100 years were calculated using Equations (1)- (11), with the assumption that 6 wave incident angles have the same probability of occurrence. The wave spreading exponent n in Equation ( 7) was 8.0, which has been popularly used for the design of offshore structures.…”

Section: Long-term Prediction Of Accelerationmentioning

confidence: 99%

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Structural Design of the Substructure of a 10 MW Floating Offshore Wind Turbine System Using Dominant Load Parameters

Park

Choung

2023

JMSE

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Fully coupled integrated load analyses (ILAs) to evaluate not only the load response but also the structural integrity are required to design a floating offshore wind turbine, since there has been no firmly established approach for obtaining the structural responses of a FOWT substructure in the time domain. This study aimed to explore if a direct strength analysis (DSA) technique that has been widely used for ships and offshore structures can adequately evaluate the FOWT substructure. In this study, acceleration and nacelle thrust were used for the dominant load parameters for DSA. The turbine thrust corresponding to the 50-year return period was taken from the literature. The acceleration response amplitude operator (RAO) was obtained through frequency response hydrodynamic analysis. The short-term sea states defined by the wave scatter diagram (WSD) of the expected installation area was represented by the JONSWAP wave spectrum. To account for the multi-directionality of the short-crested waves, the 0th order moments of the wave spectrum were corrected. The probabilities of each short-term sea state and each wave incidence angle were applied to derive the long-term acceleration for each return period. DSA cases were generated by combining the long-term acceleration and nacelle thrust to maximize the forces in the surge, sway, and heave directions. Linear spring elements were placed under the three outer columns of the substructure to provide soft constraints for hive, roll, and pitch motions. Nonlinear spring elements with initial tension were placed on the three fairlead chain stoppers (FCSs) to simulate the station-keeping ability of the mooring lines; they provided initial tension in the slacked position and an increased tension in the taut position. The structural strength evaluation of the coarse mesh finite element model with an element size same as the stiffener spacing showed that high stresses exceeding the permissible stresses occurred in the unstable members of the substructure. The high stress areas were re-evaluated using a fine mesh finite element model with an element size of 50 mm × 50 mm. The scope of structural reinforcement was identified from the fine mesh analyses. It was found that the DSA can be properly utilized for the substructure strength assessment of a FOWT.

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Section: Long-term Prediction Of Accelerationmentioning

confidence: 99%

“…Devin et al [9] performed the ILAs for a vertical axis wind turbine using OWENS [10] coupled with OpenFAST. Li et al [11] investigated the motion and structural loads of the NREL 5 MW FOWT under a typhoon condition. Ahn et al [12] used OpenFAST to investigate the variation of the tower base moment.…”

Section: Introductionmentioning

confidence: 99%

Structural Design of the Substructure of a 10 MW Floating Offshore Wind Turbine System Using Dominant Load Parameters

Park

Choung

2023

JMSE

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“…In terms of mechanism study, most of the researchers utilized the measured typhoon parameters (wind speed and direction, etc.) to generate a numerical model by CFD, FAST or IMF for the prediction of the responses of interests under the extreme loads and investigate the changes of structural vibration characteristics caused by other different load conditions [18][19][20][21][22][23][24][25]. Koji et al compared numerical results with the field measured data to verify the effectiveness of the simulated model [26].…”

Section: Introductionmentioning

confidence: 99%

Field data observations for monitoring the impact of typhoon “In-fa” on dynamic performances of mono-pile offshore wind turbines: A novel systematic study

Liu

Li³

et al. 2023

Marine Structures

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“…Tropical cyclone (TC) is a severe threat to wind power, especially offshore wind power [1,2]. It has caused many serious accidents, such as tower collapse and blade breakage [3].…”

Section: Introductionmentioning

confidence: 99%

Anti‐tropical cyclone yaw control of wind turbines based on knowledge learning and expert system

Cai¹,

Feng²,

Yao

et al. 2023

IET Control Theory & Appl

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A tropical cyclone (TC) is extreme weather severely threatening coastal wind turbines. However, the non‐extreme wind speed period (nEWSP) before and after it can also bring considerable economic benefits to wind farms. Aiming at the working conditions of nEWSP‐TC, this paper analyzes the characteristics of the wind field based on historical actual TC data and constructs a pseudo‐Monte Carlo experiment, uses the experimental results to construct a knowledge base and an inference engine, and forms an expert system to guide the yaw control of wind turbines in nEWSP‐TC. The simulation results show that the yaw error has different effects on the fatigue load of the wind turbine under different working conditions of nEWSP‐TC, and the proposed improved yaw strategy can reduce the fatigue load of the wind turbine under the premise of limited power loss and improve safe operation capability of wind turbines under nEWSP‐TC conditions.

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Impact of Typhoons on Floating Offshore Wind Turbines: A Case Study of Typhoon Mangkhut

Cited by 14 publications

References 27 publications

Structural Design of the Substructure of a 10 MW Floating Offshore Wind Turbine System Using Dominant Load Parameters

Structural Design of the Substructure of a 10 MW Floating Offshore Wind Turbine System Using Dominant Load Parameters

Field data observations for monitoring the impact of typhoon “In-fa” on dynamic performances of mono-pile offshore wind turbines: A novel systematic study

Anti‐tropical cyclone yaw control of wind turbines based on knowledge learning and expert system

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