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 journalArticlepeer-review

18 Citations (Scopus)
68 Downloads (Pure)

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 languageEnglish
Article number106361
JournalJournal of Constructional Steel Research
Volume176
DOIs
Publication statusPublished - 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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