Multiaxial Fatigue Performance of Flange and Shear Connections in floating offshore wind turbine

Aliou Badara CAMARA

Résumé


This study focuses on the fatigue performance of bolted flange connections and shear bolted connections for offshore wind turbine towers. Offshore wind turbines, which typically consist of a tower supporting the turbine blades, face significant challenges related to the structural integrity of the joints connecting different tower sections. The traditional bolted flange connection is prone to premature degradation due to fatigue loading, limiting its long-term reliability. In contrast, shear bolted connections have shown considerable improvements in fatigue resistance. This paper aims to analyze both connection types, using ANSYS simulations to assess their fatigue behavior based on Dang Van multiaxial fatigue approach. The study demonstrates that shear bolted connections outperform bolted flange connections in terms of durability, with damage in the latter being 2.5 to 4 times greater. The findings provide insights into optimizing tower design and assembly, making them more cost-effective and reliable for offshore wind turbine installations.


Mots-clés


Offshore wind turbines, Bolted flange connection, Shear connection, Multiaxial fatigue, Damage

Texte intégral :

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Références


L.CHENG. Assessment of bolted connections for supporting structures of offshore wind turbine towers - Mechanical performance and structural health monitoring, Delft University of Technology, 2023. https://doi.org/10.4233/uuid:fb1e3e10-0495-43e8-a53c-299062dbe58f

R. Ryndzionek and Ł. Sienkiewicz. Evolution of the HVDC link connecting offshore wind farms to onshore power systems, Energies, vol. 13, no. 8, 2020. https://doi.org/10.3390/en13081914

I. Troen, L. Petersen. European wind atlas, Risø National Laboratory,1989. https://orbit.dtu.dk/en/publications/european-wind-atlas

M. Cruciani. L’éolien offshore flottant dans sa dimension industrielle et technologique, IFRI Centre Energie, 2019.

W. Weijtjens, A. Stang, C. Devriendt, P. Schaumann. Bolted ring flanges in offshore-wind support structures, Journal of Constructional Steel Research, 2021. https://doi.org/10.1016/j.jcsr.2020.106361

RWE AG, Amrumbank West offshore wind farm, 2020. https://www.rwe.com/en/the-group/countries-and-locations/amrumbank-west-offshore-wind-farm/

Nobelwind, Offshore wind energy power plant – Annual work report 2021, 2022.

C. Heistermann. Behaviour of Pretensioned Bolts in Friction Connections, Licentiate thesis, 2011)

G. Bracq, l’éolien offshore flottant

C. Heistermann. Resistance of Friction Connections with Open Slotted Holes in Towers for Wind Turbines, Doctoral Thesis, 2014.

R. K. Altes. Influence of geometric imperfections and increasing turbine sizes on validity load transfer functions in bolted ring-flange connections, Delft University of Technology, 2023.

G. L. Kulak, J. W. Fisher, and J. H. A. Struik. Guide to Design Criteria for Bolted and Riveted Joints,American Institute of Steel Construction, 2001.

EN 1993-1-8 - Eurocode 3: Design of steel structures - Part 1-8: Design of joints, vol. 33, pp. 1-135, 2005.

B. Weber. Fatigue multiaxiale des structures industrielles sous chargement quelconque, Thèse,INSA Lyon, 1999.

K. Dang Van, O. Griveau, B Message. On a new Multiaxial Fatigue Limite Criterion : Theory and Application, Proceedings of the International Conference on Biaxial/Multiaxial Fatigue, University of Sheffield, pp. 479-496, 1989.

K. Dang Van, A. Le Douaron, H. P. Lieurade. Multiaxial fatigue limit: a new approach, Proceedings of the 6th International Conference on Fracture (ICF6), New Delhi, India, 4–10 December 1984, pp. 1879-1885, 1984.

B. Weber, B. Kenmeugne, J.C. Clement, J. L. Robert. Improvements of multiaxial fatigue criteria computation for a strong reduction of calculation duration, Comput. Mater. Sci., vol. 15, pp. 381-399, 1999.

A. B. Camara. Analyse du comportement en fatigue d’assemblages boulonnés. Thèse, Université Clermont-Auvergne, pp. 1-201, 2019.

Recommended Practice DNVGL-RP-C203 : Fatigue design of offshore steel structures, pp. 1-18, 2005.

J. L. Harald Zenner, Armin Smbürger. on the fatigue limit of ductile metals under complex multiaxial loading, Int.J. of fatigue, pp. 137–145, 2000.


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