Investigation of higher-harmonic wave loads and low-frequency resonance response of floating offshore wind turbine under extreme wave groups

Zeng, Xinmeng; Shao, Yanlin; Li, Xin

doi:10.1016/j.marstruc.2023.103401

Cited by 52 publications

(9 citation statements)

References 24 publications

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“…The natural frequencies in the horizontal plane are, in fact, excited by the low second-order frequencies emanating from the second-order potential problem. Thus, in the horizontal plane, low-frequency second-order hydrodynamic loads can cause large-amplitude motions (commonly called slow drift motions) in the FWTS, an effect that is not captured by a first-order PF theory [110,111]. This shortcoming of the first-order PF theory can lead to a significant underestimation of FWTS motion responses and, as a result, lead to an inaccurate estimate of the loads acting on the mooring system in the design process.…”

Section: Hydrodynamicsmentioning

confidence: 99%

A Review of Numerical and Physical Methods for Analyzing the Coupled Hydro–Aero–Structural Dynamics of Floating Wind Turbine Systems

Maali Amiri,

Shadman,

Estefen

2024

JMSE

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Recently, more wind turbine systems have been installed in deep waters far from the coast. Several concepts of floating wind turbine systems (FWTS) have been developed, among which, the semi-submersible platform—due to its applicability in different water depths, good hydrodynamic performance, and facility in the installation process—constitutes the most explored technology compared to the others. However, a significant obstacle to the industrialization of this technology is the design of a cost-effective FWTS, which can be achieved by optimizing the geometry, size, and weight of the floating platform, together with the mooring system. This is only possible by selecting a method capable of accurately analyzing the FWTS-coupled hydro–aero–structural dynamics at each design stage. Accordingly, this paper provides a detailed overview of the most commonly coupled numerical and physical methods—including their basic assumptions, formulations, limitations, and costs used for analyzing the dynamics of FWTS, mainly those supported by a semi-submersible—to assist in the choice of the most suitable method at each design phase of the FWTS. Finally, this article discusses possible future research directions to address the challenges in modeling FWTS dynamics that persist to date.

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Section: Hydrodynamicsmentioning

confidence: 99%

A Review of Numerical and Physical Methods for Analyzing the Coupled Hydro–Aero–Structural Dynamics of Floating Wind Turbine Systems

Maali Amiri,

Shadman,

Estefen

2024

JMSE

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“…Numerical simulations primarily involve boundary element methods, the VOF method, etc. Xinmeng et al [7] focused on analyzing higher harmonic load, dynamic motion response, and tension load of the mooring line of the DeepCwind semi-submersible FOWT. The results show that the higher-harmonic wave load cannot be ignored in the extreme marine environment, the second harmonic can be over 16% of the linear wave load, and the third harmonic can be over 10% of the linear wave load with large wave steepness.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigations for Impact Loading on Platform Decks

Geng,

Sun,

Gao

et al. 2024

JMSE

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Experimental measurement and numerical simulations were carried out for investigating the impact loading behavior of platform decks under regular and irregular wave actions. In the numerical simulation section, a full-scale numerical wave tank was established using STAR-CCM+ software. A decreased tendency can be observed for an increased relative length of platform when the incident wave length is double the deck length. The increased deck height can also decrease impact loading on the platform, which is due to the platform being far away from the incident wave. Impact loading on the deck decreases with the increase in inclination angle, which can be explained by the deck bottom being directly exposed to the incident wave at negative inclination angles. Finally, the variation tendency of impact loading on platform decks under irregular wave actions is similar to that under regular wave actions, including the averaged values and significant values.

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“…Zeng et al, 2024 summarized the research progress of nonlinear fluid dynamics of floating offshore wind turbines. Zeng et al, 2023 studied the high order harmonic load and low frequency resonance response of offshore floating wind turbine under extreme wave group. Zeng et al, 2021 conducted numerical and experimental studies on the wave breaking power of a single pile offshore wind turbine.…”

Section: Introductionmentioning

confidence: 99%

Scale-sensitivity analysis for floating energy production system with anti-motion structure under high sea conditions

Yuan,

Chen,

et al. 2024

Front. Energy Res.

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The heave motion of a new cylindrical floating drilling production storage and offloading system (FDPSO) with extended cylinder, anti-motion structure and a gap between the extended cylinder and anti-motion structure under high sea conditions was investigated by implementing numerical simulations for its reduced-scale laminar flow model (1:77.8) using the CFD software STAR-CCM+. The effect of changing the width (10 ∼ 15 m) and height (10 ∼ 15 m) of the anti-motion structure on the heave motion of the new cylindrical FDPSO were analyzed. The results show that increasing the width and height of the anti-motion structure increases the natural period of the structural heave motion, making it far away from the main energy period of the wave, and has a certain inhibitory effect on the heave motion of the FDPSO. Comparing the variation of vortex field around the structures of different sizes, it is concluded that the vortex generation and vortex shedding around the highwidth anti-motion structure model is significantly strengthened compared with the low-width anti-motion structure model. The variation of the vortex generation and vortex shedding due to the change in height is relatively inferior compared to the change in width.

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Investigation of higher-harmonic wave loads and low-frequency resonance response of floating offshore wind turbine under extreme wave groups

Cited by 52 publications

References 24 publications

A Review of Numerical and Physical Methods for Analyzing the Coupled Hydro–Aero–Structural Dynamics of Floating Wind Turbine Systems

A Review of Numerical and Physical Methods for Analyzing the Coupled Hydro–Aero–Structural Dynamics of Floating Wind Turbine Systems

Experimental and Numerical Investigations for Impact Loading on Platform Decks

Scale-sensitivity analysis for floating energy production system with anti-motion structure under high sea conditions

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