Bolted ring flanges in offshore-wind support structures - in-situ validation of load-transfer behaviour

Wout Weijtjens; Andre Stang; Christof Devriendt; Peter Schaumann

doi:10.1016/j.jcsr.2020.106361

Bolted ring flanges in offshore-wind support structures - in-situ validation of load-transfer behaviour

Wout Weijtjens, Andre Stang, Christof Devriendt, Peter Schaumann

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

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Abstract

Offshore wind turbines are subjected to cyclic loads from wind and waves, ultimately resulting in a fatigue-driven design. These cyclic loads result in cyclic shell forces above the bolted ring ﬂange and ultimately into the cyclic loading of the bolt tension forces. To model the transfer of the shell forces into the bolt, Load Transfer Functions (LTF) are used, of which the tri-linear function according Schmidt/Neuper is the most known approximation but more contemporary approaches exist. As the LTF has a signiﬁcant impact on the estimated fatigue lifetime of the bolt, it is relevant to investigate the accuracy of the currently used LTF.

Original language	English
Article number	106361
Number of pages	15
Journal	Journal of Constructional Steel Research
Volume	176
DOIs	https://doi.org/10.1016/j.jcsr.2020.106361
Publication status	Published - Jan 2021

Bibliographical note

Funding Information:
The current research was conducted in the frame of the O&O Nobelwind, a research project with the support of the agency Flanders Innovation Entrepreneurship. Wout Weijtjens is a Post-doctoral researcher at the Research Foundation Flanders (FWO). At the Institute for Steel Construction, the research work was conducted within the ForWind joint research project” ventus efficiens – Joint research for the efficiency of wind energy converters within the energy supply system”. This project is financially supported by the Ministry for Science and Culture in Lower Saxony, Germany. The financial support and cooperation is kindly acknowledged.

Funding Information:
The current research was conducted in the frame of the O&O Nobelwind, a research project with the support of the agency Flanders Innovation Entrepreneurship. Wout Weijtjens is a Post-doctoral researcher at the Research Foundation Flanders (FWO). At the Institute for Steel Construction, the research work was conducted within the ForWind joint research project? ventus efficiens ? Joint research for the efficiency of wind energy converters within the energy supply system?. This project is financially supported by the Ministry for Science and Culture in Lower Saxony, Germany. The financial support and cooperation is kindly acknowledged. The current paper is an equal effort of Vrije Universiteit Brussels (VUB) and Leibniz University Hannover (LUH). In which the VUB executed and processed the long measurement campaign, LUH developed the FE-Models and derived the corresponding load transfer functions. The authors also want to show their gratitude to the people of Parkwind and Nobelwind for their support during this project.

Publisher Copyright:
© 2020 Elsevier Ltd

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

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10.1016/j.jcsr.2020.106361

Bolted ring flanges in offshore-wind support structures - in-situ validation of 1 load-transfer behaviourAccepted author manuscript, 10.3 MBLicence: CC BY-NC-ND

Cite this

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title = "Bolted ring flanges in offshore-wind support structures - in-situ validation of load-transfer behaviour",

abstract = "Offshore wind turbines are subjected to cyclic loads from wind and waves, ultimately resulting in a fatigue-driven design. These cyclic loads result in cyclic shell forces above the bolted ring ﬂange and ultimately into the cyclic loading of the bolt tension forces. To model the transfer of the shell forces into the bolt, Load Transfer Functions (LTF) are used, of which the tri-linear function according Schmidt/Neuper is the most known approximation but more contemporary approaches exist. As the LTF has a signiﬁcant impact on the estimated fatigue lifetime of the bolt, it is relevant to investigate the accuracy of the currently used LTF.",

author = "Wout Weijtjens and Andre Stang and Christof Devriendt and Peter Schaumann",

note = "Funding Information: The current research was conducted in the frame of the O&O Nobelwind, a research project with the support of the agency Flanders Innovation Entrepreneurship. Wout Weijtjens is a Post-doctoral researcher at the Research Foundation Flanders (FWO). At the Institute for Steel Construction, the research work was conducted within the ForWind joint research project” ventus efficiens – Joint research for the efficiency of wind energy converters within the energy supply system”. This project is financially supported by the Ministry for Science and Culture in Lower Saxony, Germany. The financial support and cooperation is kindly acknowledged. Funding Information: The current research was conducted in the frame of the O&O Nobelwind, a research project with the support of the agency Flanders Innovation Entrepreneurship. Wout Weijtjens is a Post-doctoral researcher at the Research Foundation Flanders (FWO). At the Institute for Steel Construction, the research work was conducted within the ForWind joint research project? ventus efficiens ? Joint research for the efficiency of wind energy converters within the energy supply system?. This project is financially supported by the Ministry for Science and Culture in Lower Saxony, Germany. The financial support and cooperation is kindly acknowledged. The current paper is an equal effort of Vrije Universiteit Brussels (VUB) and Leibniz University Hannover (LUH). In which the VUB executed and processed the long measurement campaign, LUH developed the FE-Models and derived the corresponding load transfer functions. The authors also want to show their gratitude to the people of Parkwind and Nobelwind for their support during this project. Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

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doi = "10.1016/j.jcsr.2020.106361",

language = "English",

volume = "176",

journal = "Journal of Constructional Steel Research",

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AU - Schaumann, Peter

N1 - Funding Information: The current research was conducted in the frame of the O&O Nobelwind, a research project with the support of the agency Flanders Innovation Entrepreneurship. Wout Weijtjens is a Post-doctoral researcher at the Research Foundation Flanders (FWO). At the Institute for Steel Construction, the research work was conducted within the ForWind joint research project” ventus efficiens – Joint research for the efficiency of wind energy converters within the energy supply system”. This project is financially supported by the Ministry for Science and Culture in Lower Saxony, Germany. The financial support and cooperation is kindly acknowledged. Funding Information: The current research was conducted in the frame of the O&O Nobelwind, a research project with the support of the agency Flanders Innovation Entrepreneurship. Wout Weijtjens is a Post-doctoral researcher at the Research Foundation Flanders (FWO). At the Institute for Steel Construction, the research work was conducted within the ForWind joint research project? ventus efficiens ? Joint research for the efficiency of wind energy converters within the energy supply system?. This project is financially supported by the Ministry for Science and Culture in Lower Saxony, Germany. The financial support and cooperation is kindly acknowledged. The current paper is an equal effort of Vrije Universiteit Brussels (VUB) and Leibniz University Hannover (LUH). In which the VUB executed and processed the long measurement campaign, LUH developed the FE-Models and derived the corresponding load transfer functions. The authors also want to show their gratitude to the people of Parkwind and Nobelwind for their support during this project. Publisher Copyright: © 2020 Elsevier Ltd Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

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Y1 - 2021/1

N2 - Offshore wind turbines are subjected to cyclic loads from wind and waves, ultimately resulting in a fatigue-driven design. These cyclic loads result in cyclic shell forces above the bolted ring ﬂange and ultimately into the cyclic loading of the bolt tension forces. To model the transfer of the shell forces into the bolt, Load Transfer Functions (LTF) are used, of which the tri-linear function according Schmidt/Neuper is the most known approximation but more contemporary approaches exist. As the LTF has a signiﬁcant impact on the estimated fatigue lifetime of the bolt, it is relevant to investigate the accuracy of the currently used LTF.

AB - Offshore wind turbines are subjected to cyclic loads from wind and waves, ultimately resulting in a fatigue-driven design. These cyclic loads result in cyclic shell forces above the bolted ring ﬂange and ultimately into the cyclic loading of the bolt tension forces. To model the transfer of the shell forces into the bolt, Load Transfer Functions (LTF) are used, of which the tri-linear function according Schmidt/Neuper is the most known approximation but more contemporary approaches exist. As the LTF has a signiﬁcant impact on the estimated fatigue lifetime of the bolt, it is relevant to investigate the accuracy of the currently used LTF.

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Bolted ring flanges in offshore-wind support structures - in-situ validation of load-transfer behaviour

Abstract

Bibliographical note

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FWOTM805: Follow-up of the consumed life for a fleet of time-varying mechanical systems with models based on measurements and a limited number of sensors

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Bolted ring flanges in offshore-wind support structures - in-situ validation of load-transfer behaviour

Abstract

Bibliographical note

Access to Document

Other files and links

Fingerprint

Projects

FWOTM805: Follow-up of the consumed life for a fleet of time-varying mechanical systems with models based on measurements and a limited number of sensors

Cite this