Preliminary evaluation of monopile foundation dimensions for an offshore wind turbine by analyzing hydrodynamic load in the frequency domain

2013 ◽  
Vol 54 ◽  
pp. 211-218 ◽  
Author(s):  
Ki-Yong Oh ◽  
Ji-Young Kim ◽  
Jun-Shin Lee
Keyword(s):  
Wind Turbine ◽  
Frequency Domain ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Preliminary Evaluation ◽  
Hydrodynamic Load

Dynamic Response of a Semi-Submersible Floating Offshore Wind Turbine in Storm Condition

2012 ◽  
Vol 260-261 ◽  
pp. 273-278 ◽  
Author(s):  
Hai Tao Wu ◽  
Jin Jiang ◽  
Jing Zhao ◽  
Xiao Rong Ye
Keyword(s):  
Dynamic Response ◽  
Wind Turbine ◽  
Time History ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Offshore Platforms ◽  
Hydrodynamic Load ◽  
Floating Offshore Wind Turbine ◽  
The Time Domain ◽  
Storm Condition

The paper focuses on a semi-submersible floating offshore wind turbine (FOWT) and analyses its dynamic response in storm condition. The wind load is calculated based on wind block model; the hydrodynamic load is modeled using Potential Theory and Morison Equation. The time-domain dynamic response of the FOWT is simulated by SESAM software with duration of 3 hours. The performance of the FOWT is analyzed based on time history responses and response spectrums. The results show some unique characteristics that differ from offshore platforms and the analysis proofs that the performance is acceptable and the design is reliable.

Stochastic Linearization of the Morison Equation Applied to an Offshore Wind Turbine

2015 ◽  
Author(s):  
Charaf Ouled Housseine ◽  
Charles Monroy ◽  
Guillaume de Hauteclocque
Keyword(s):  
Wind Turbine ◽  
Wave Field ◽  
Frequency Domain ◽  
Wave Model ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Morison Equation ◽  
Incoming Wave ◽  
Irregular Wave ◽  
Seakeeping Analysis

This paper aims at comparing different implementations of the Morison equation for seakeeping analysis in frequency domain. For more consistency, different wave models are considered and the total wave field (incoming wave, the diffracted and the radiated wave field) is included in the Morison equation. A state-of-the-art of theMorison equation and the drag force linearized forms are presented. The implementation procedure, based on an iterative frequency domain scheme, is developed for the regular and the irregular wave cases. Seakeeping analysis of an offshore wind turbine is considered as an application case. A comparison between numerical simulations and measured responses is presented. For the floater’s numerical model, skirts damping effect and hydrodynamic loads applied on cylindrical bracings are modeled using the Morison equation. The drag and inertia coefficients are considered constant for all sea states and calibrated using the experimental results. Response amplitude operators (RAOs) and short-termstatistics of motions show a good agreement between experimental and numerical results. The influence of different calculation parameters including the wave model (regular/irregular) and the wave fields (incident/total) are investigated.

The Potential for Combining Floating Wind Turbines With Point Absorbing Wave Energy Converters

2021 ◽  
Author(s):  
David M. Skene ◽  
Nataliia Sergiienko ◽  
Boyin Ding ◽  
Benjamin Cazzolato
Keyword(s):  
Wind Turbine ◽  
Frequency Domain ◽  
Wave Energy ◽  
Two Dimensions ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Specific Design ◽  
Energy Converter ◽  
Point Absorber ◽  
Wave Energy Converters

Abstract The potential for coupling a cylindrical point absorber type wave energy converter (WEC) to a 5MW spar type floating offshore wind turbine is investigated. The wind and WEC system is modelled in the frequency domain and in two dimensions under the simplifying assumption that wind and waves propagate in the same direction. Coupling of the bodies is considered with respect to all theoretical combinations that might be achieved rather than a single specific design. Results are analysed with respect to the maximum power that the WEC coupling can achieve. It is shown that for mild waves the WEC can theoretically produce power in the range of 0.2 to 0.6 MW, its optimal dimensions are such that the draft and radius are approximately 18.8 m, and that obtaining this power tends to marginally amplify the pitch of the spar.

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