Hydrodynamic response of alternative floating substructures for spar-type offshore wind turbines

Wang, Baowei; Rahmdel, Sajad; Han, Chang-Wan; Jung, Seungbin; Park, Seonghun

doi:10.12989/was.2014.18.3.267

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…In this study, an attempt was made to address this issue by introducing damping plates. The idea is inspired by truss spars used in the oil and gas industry, which have been found to be cost-effective and reduce drag loads by current more than the classic spar [26,27]. Previously, one of the authors conducted a preliminary experimental study on the damping plates [28], but the hydrodynamic mechanism has not been confirmed.…”

Section: Introductionmentioning

confidence: 99%

Investigation into the Potential Use of Damping Plates in a Spar-Type Floating Offshore Wind Turbine

Srinivasamurthy,

Ishida,

Yoshida

2024

JMSE

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Spar is one of the promising floating platforms to support offshore wind turbines. Wind heeling moment is large in the case of floating offshore wind turbines and, therefore, it is important to reduce the pitch motion of the floating platform. To address this issue, a spar platform with damping plates is proposed and investigated in this study. (i) Type-A, (ii) Type-B, and (iii) Type-C models of 1/120 scale were fabricated with similar stability parameters. Type-A is a classic spar, Type-B and Type-C are spar with damping plates by replacing the ballast water part with horizontal plates and vertical plates, respectively. The rotor model consists of (i) no disk and (ii) with disk conditions. A series of model scale experiments were carried out in the water tank in regular waves, and motion response was measured. A calculation method based on classic frequency-domain was developed to incorporate damping plates and validated with the experiment results in no disk and with disk conditions. When pitch response of Type-B and Type-C were compared with respect to Type-A, it was found that the spar platform with damping plates reduced the pitch response in most wave frequencies.

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Section: Introductionmentioning

confidence: 99%

Investigation into the Potential Use of Damping Plates in a Spar-Type Floating Offshore Wind Turbine

Srinivasamurthy,

Ishida,

Yoshida

2024

JMSE

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“…A liquid-cooling system for the direct-drive generator was designed to satisfy the requirement of the power-increasing of the wind turbines. 2 Motions of the wind turbine based on a truss spar were compared with those based on a classic spar by Wang et al 3 using ANSYS software. Numerical modeling of a spar platform tethered by a mooring cable was established by Zhu and Yoo 4 using MATLAB code.…”

Section: Introductionmentioning

confidence: 99%

“…Some modeling of the floating wind turbine is created using ANSYS software, but the wind loads are either ignored or replaced with one concentrated forces in the published papers. 3,5 Meanwhile, the flexible deformation of the tower and blades is ignored. The National Renewable Energy Laboratory (NREL) developed Fatigue, Aerodynamics, Structures, Turbulence (FAST) system to analyze the floating wind turbines.…”

Section: Introductionmentioning

confidence: 99%

Flexible dynamic analysis of an offshore wind turbine installed on a floating spar platform

Zhu

Yoo

2016

Advances in Mechanical Engineering

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Flexible dynamic analysis is a critical process in designing offshore wind turbines that are composed of several huge components. This process was implemented with a hybrid method of finite element multibody system using commercial software in this article. Based on this method, the tower and blades were modeled as flexible components using threedimensional solid elements. The effect of flexible deformation of the tower and blades on the global motions of the floating wind turbine was investigated by comparing the simulation results from the flexible body modeling with those from the rigid body modeling. The tower, blades, and spar platform were divided into sections according to the geometry configuration of the 5-MW OC3-Hywind floating wind turbine. The time-and position-dependent loads, coming from the wind, wave, and mooring system, were expressed approximately with respect to the divided sections. The relationships between the global motions and the external loads were studied, which indicated that the wind loads had dominant influences on the translational motions and the rotational motions were mainly generated by the propagating waves.

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“…Owing to their large size, they are more stable but have to carry large wave current loads, while the wind turbines suffer wake effect due to close proximity to other wind turbines on the floater. Over the last decade several concepts [ 12,13,14,15,16] of single wind turbine floaters have been investigated, these systems would resolve issues involved in the multi-turbine system but they suffer from stronger wave induced loads. The wave loads influence the wind turbine through six degrees of freedom of the supporting floater system as shown in figure 1.…”

Section: Introductionmentioning

confidence: 99%

Influence of Floater Response on Wind Turbine Tower Moments in Floating Wind Turbine System

Waris¹,

Ishihara²

2015

Proceedings of the 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Hydrodynamic response of alternative floating substructures for spar-type offshore wind turbines

Cited by 4 publications

References 7 publications

Investigation into the Potential Use of Damping Plates in a Spar-Type Floating Offshore Wind Turbine

Investigation into the Potential Use of Damping Plates in a Spar-Type Floating Offshore Wind Turbine

Flexible dynamic analysis of an offshore wind turbine installed on a floating spar platform

Influence of Floater Response on Wind Turbine Tower Moments in Floating Wind Turbine System

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