Dynamic Response for a Submerged Floating Offshore Wind Turbine with Different Mooring Configurations

Li, Yane; Le, Conghuan; Ding, Hongyan; Zhang, Puyang; Zhang, Jian

doi:10.3390/jmse7040115

Cited by 25 publications

(15 citation statements)

References 30 publications

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“…Wind energy systems, especially those offshore, face difficult competition from traditional carbon-based energy sources with respect to cost competitiveness per kilowatt hour. To counter this problem, many energy systems have increased in size and power in order to achieve utility-scale production and to access higher winds aloft [1,2]. Recently, the large-scale offshore wind turbine has had more than 5 MW of the power and more than 80 m of the blade length.…”

Section: Introductionmentioning

confidence: 99%

Performance and Effect of Load Mitigation of a Trailing-Edge Flap in a Large-Scale Offshore Wind Turbine

Cai

Wang

et al. 2020

JMSE

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As a result of the large-scale trend of offshore wind turbines, wind shear and turbulent wind conditions cause significant fluctuations of the wind turbine’s torque and thrust, which significantly affect the service life of the wind turbine gearbox and the power output stability. The use of a trailing-edge flap is proposed as a supplement to the pitch control to mitigate the load fluctuations of large-scale offshore wind turbines. A wind turbine rotor model with a trailing-edge flap is established by using the free vortex wake (FVW) model. The effects of the deflection angle of the trailing-edge flap on the load distribution of the blades and wake flow field of the offshore wind turbine are analyzed. The wind turbine load response under the control of the trailing-edge flap is obtained by simulating shear wind and turbulent wind conditions. The results show that a better control effect can be achieved in the high wind speed condition because the average angle of attack of the blade profile is small. The trailing-edge flap significantly changes the load distribution of the blade and the wake field and mitigates the low-frequency torque and thrust fluctuations of the turbine rotor under the action of wind shear and turbulent wind.

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Section: Introductionmentioning

confidence: 99%

Performance and Effect of Load Mitigation of a Trailing-Edge Flap in a Large-Scale Offshore Wind Turbine

Cai

Wang

et al. 2020

JMSE

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“…Also, when the mooring lines in the direction of upwind waves are broken, the motion response of the structure increases and no slack is observed in the remaining mooring lines. 24 Chuang et al carried out an integrated analysis on an OC4-DeepCwind floating wind turbine installed on a semi-submersible platform. The examinations were conducted in real sea conditions, and for the integrated time-domain analysis, FAST and SIMA solvers were employed.…”

Section: Introductionmentioning

confidence: 99%

“…Also, when the mooring lines in the direction of upwind waves are broken, the motion response of the structure increases and no slack is observed in the remaining mooring lines. 24…”

Section: Introductionmentioning

confidence: 99%

Optimization study of a catenary mooring system for a spar floating wind turbine based on its hydrodynamic responses

Tafazzoli

Shafaghat

Alamian

2020

Proceedings of the Institution of Mechanical Engineers, Part M:

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In this article, selecting an appropriate mooring system for the spar platform of a wind turbine consisting of chain–cable–chain is investigated based on a meta-heuristic method. A boundary element software is applied to hydrodynamics analysis, and the numerical results are verified by experimental results. According to the characteristics of the experimental mooring system, an appropriate chain is selected for the prototype model, and then a mooring system consisting of chain–cable–chain replaces the chain-based mooring system. Environmental forces have been applied by the conditions of the Caspian Sea. Analysis is done in time domain for irregular wave spectrum of Joint North Sea Wave Project. For the cable in the middle, seven lengths in the range of 30–210 m were considered. The simulations showed that in the cable length of 180 m, the structure exhibits a proper behavior. Also, in order to increase the reliability of the anchor, a portion of the initial chain was reduced and was added to the anchor chain; for this purpose, five different chain lengths from 25 to 65 m have been considered. The results show that for the heave, roll, pitch, and yaw degrees of freedom, the minimum structure oscillation happens in the length of 25 m, finally considering the proper behavior of the structure in the length of 25 m; this length of chain was added to the anchor chain.

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“…A hydrodynamic analysis and coupled dynamics study of Catenary Anchor Leg Moorings buoys and attached submarine hoses were performed in [12]. In [13], the dynamic response of the platform, bending moment at the base and mooring line tensions were all simultaneously analyzed to validate the significance of mooring configuration on the stability of a submerged offshore wind turbines. A probabilistic approach, including different loading conditions, damage cases and accounting for their occurrences and its effects towards the stability of offshore structures was implemented in [14].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of Suction Stabilized Floating Platforms

Subramanian

Dye

Redkar

2020

JMSE

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The occurrence of parametric resonance due to the time varying behavior of ocean waves could lead to catastrophic damages to offshore structures. A stable structure that could withstand the wave perturbations is quintessential to operate in such a harsh environment. In this work, the authors detail the relevance of a Suction Stabilized Float (SSF) or a Suction Stabilized Floating platform towards such an application. A generic design of a symmetrically shaped float structure along with its inherent stabilization behavior is discussed. Furthermore, the authors extend their prior research on this topic towards modelling the dynamics of SSF and perform stability analysis. The authors demonstrate the dynamical characteristics of SSF analytically using Floquet theory and Normal Forms technique, in this work. Additionally, the simulation results are verified and validated with the numerical methods.

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Dynamic Response for a Submerged Floating Offshore Wind Turbine with Different Mooring Configurations

Cited by 25 publications

References 30 publications

Performance and Effect of Load Mitigation of a Trailing-Edge Flap in a Large-Scale Offshore Wind Turbine

Performance and Effect of Load Mitigation of a Trailing-Edge Flap in a Large-Scale Offshore Wind Turbine

Optimization study of a catenary mooring system for a spar floating wind turbine based on its hydrodynamic responses

Dynamic Analysis of Suction Stabilized Floating Platforms

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