Quasi‐static response of a bottom‐fixed wind turbine subject to various incident wind fields

Abstract In the design of offshore wind farms the simulated dynamic response of the wind turbine structure includes loading from turbulent wind. The International Electrotechnical Commission (IEC) standard for wind turbine design recommends both the Mann spectral tensor model and the Kaimal spectral...

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Autores principales:	Astrid Nybø, Finn Gunnar Nielsen, Marte Godvik
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	coherence damage equivalent moments offshore wind turbines quasi‐static response spectral response turbulence models Renewable energy sources TJ807-830
Acceso en línea:	https://doaj.org/article/f8bb572dffd24f49bf55f5ea7b5fbb17
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spelling	oai:doaj.org-article:f8bb572dffd24f49bf55f5ea7b5fbb172021-11-26T14:02:23ZQuasi‐static response of a bottom‐fixed wind turbine subject to various incident wind fields1099-18241095-424410.1002/we.2642https://doaj.org/article/f8bb572dffd24f49bf55f5ea7b5fbb172021-12-01T00:00:00Zhttps://doi.org/10.1002/we.2642https://doaj.org/toc/1095-4244https://doaj.org/toc/1099-1824Abstract In the design of offshore wind farms the simulated dynamic response of the wind turbine structure includes loading from turbulent wind. The International Electrotechnical Commission (IEC) standard for wind turbine design recommends both the Mann spectral tensor model and the Kaimal spectral model combined with an exponential coherence formulation. These models give deviating wind loads. This study compares these two models to a large eddy simulations model and a model based on offshore wind measurements. The comparisons are performed for three situations, covering unstable, neutral and stable atmospheric conditions. The impact of the differences in the wind fields on the quasi‐static response of a large bottom‐fixed wind turbine is investigated. The findings are supported by an assessment of the impact of individual wind characteristics on the turbine responses. The wind model based on measurements causes high tower bottom and blade root flapwise bending moments due to a high wind load at very low frequencies. Low and negative horizontal coherence is obtained using the Mann spectral tensor model. This causes relatively large yaw moments as compared to the results using the other wind models. The largest differences in response are seen in the stable situation. We furthermore show that the quasi‐static wind load has great impact on the total damage equivalent moments of the structure. From the results, we conclude that in the design of large offshore wind turbines one should carefully consider the structure of the turbulent wind. Further, longer simulations than recommended by the standards should be used to reduce uncertainty in estimated response.Astrid NybøFinn Gunnar NielsenMarte GodvikWileyarticlecoherencedamage equivalent momentsoffshore wind turbinesquasi‐static responsespectral responseturbulence modelsRenewable energy sourcesTJ807-830ENWind Energy, Vol 24, Iss 12, Pp 1482-1500 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	coherence damage equivalent moments offshore wind turbines quasi‐static response spectral response turbulence models Renewable energy sources TJ807-830
spellingShingle	coherence damage equivalent moments offshore wind turbines quasi‐static response spectral response turbulence models Renewable energy sources TJ807-830 Astrid Nybø Finn Gunnar Nielsen Marte Godvik Quasi‐static response of a bottom‐fixed wind turbine subject to various incident wind fields
description	Abstract In the design of offshore wind farms the simulated dynamic response of the wind turbine structure includes loading from turbulent wind. The International Electrotechnical Commission (IEC) standard for wind turbine design recommends both the Mann spectral tensor model and the Kaimal spectral model combined with an exponential coherence formulation. These models give deviating wind loads. This study compares these two models to a large eddy simulations model and a model based on offshore wind measurements. The comparisons are performed for three situations, covering unstable, neutral and stable atmospheric conditions. The impact of the differences in the wind fields on the quasi‐static response of a large bottom‐fixed wind turbine is investigated. The findings are supported by an assessment of the impact of individual wind characteristics on the turbine responses. The wind model based on measurements causes high tower bottom and blade root flapwise bending moments due to a high wind load at very low frequencies. Low and negative horizontal coherence is obtained using the Mann spectral tensor model. This causes relatively large yaw moments as compared to the results using the other wind models. The largest differences in response are seen in the stable situation. We furthermore show that the quasi‐static wind load has great impact on the total damage equivalent moments of the structure. From the results, we conclude that in the design of large offshore wind turbines one should carefully consider the structure of the turbulent wind. Further, longer simulations than recommended by the standards should be used to reduce uncertainty in estimated response.
format	article
author	Astrid Nybø Finn Gunnar Nielsen Marte Godvik
author_facet	Astrid Nybø Finn Gunnar Nielsen Marte Godvik
author_sort	Astrid Nybø
title	Quasi‐static response of a bottom‐fixed wind turbine subject to various incident wind fields
title_short	Quasi‐static response of a bottom‐fixed wind turbine subject to various incident wind fields
title_full	Quasi‐static response of a bottom‐fixed wind turbine subject to various incident wind fields
title_fullStr	Quasi‐static response of a bottom‐fixed wind turbine subject to various incident wind fields
title_full_unstemmed	Quasi‐static response of a bottom‐fixed wind turbine subject to various incident wind fields
title_sort	quasi‐static response of a bottom‐fixed wind turbine subject to various incident wind fields
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/f8bb572dffd24f49bf55f5ea7b5fbb17
work_keys_str_mv	AT astridnybø quasistaticresponseofabottomfixedwindturbinesubjecttovariousincidentwindfields AT finngunnarnielsen quasistaticresponseofabottomfixedwindturbinesubjecttovariousincidentwindfields AT martegodvik quasistaticresponseofabottomfixedwindturbinesubjecttovariousincidentwindfields
_version_	1718409327528640512

Quasi‐static response of a bottom‐fixed wind turbine subject to various incident wind fields

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