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Dynamic Response of Articulated Offshore Wind Turbines under Different Water Depths

Lookup NU author(s): Professor Zhiqiang Hu

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

Focusing on the transitional depth offshore area from 50 m to 75 m, types of articulatedfoundations are proposed for supporting the NREL 5 MWoffshore wind turbine. To investigate thedynamic behaviors under various water depths, three articulated foundations were adopted andnumerical simulations were conducted in the time domain. An in-house code was chosen to simulatethe dynamic response of the articulated offshorewind turbine. The aerodynamic load on rotating bladesand the wind pressure load on tower are calculated based on the blade element momentum theoryand the empirical formula, respectively. The hydrodynamic load is simulated by 3D potential flowtheory. The motions of foundation, the aerodynamic performance of the wind turbine, and the loadson the articulated joint are documented and compared in different cases. According to the simulation,all three articulated offshore wind turbines show great dynamic performance and totally meet therequirement of power generation under the rated operational condition. Moreover, the comparison isbased on time histories and spectra among these responses. The result shows that dynamic responsesof the shallower one oscillate more severely compared to the other designs.

Publication metadata

Author(s): Zhang P, Yang S, Li Y, G J, Hu Z, Zhang R, Tang Y

Publication type: Article

Publication status: Published

Journal: Energies

Year: 2020

Volume: 2020

Issue: 13

Online publication date: 01/06/2020

Acceptance date: 26/05/2020

Date deposited: 01/06/2020

ISSN (electronic): 1996-1073

Publisher: M D P I AG

URL: https://doi.org/10.3390/en13112784

DOI: 10.3390/en13112784

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