Print Email Facebook Twitter Methodology for estimating offshore wind turbine fatigue life under combined loads of wind, waves and ice at sub-zero temperatures Title Methodology for estimating offshore wind turbine fatigue life under combined loads of wind, waves and ice at sub-zero temperatures Author Milaković, Aleksandar-Saša (Hamburg University of Technology) Braun, Moritz (Hamburg University of Technology) Willems, Tom (Siemens Gamesa Renewable Energy) Hendrikse, H. (TU Delft Offshore Engineering) Fischer, Claas (TÜV NORD EnSys Hannover GmbH & Co. KG) Ehlers, Sören (Hamburg University of Technology) Date 2019 Abstract Due to increasing trend of building offshore wind turbines (OWTs) in seas at high latitudes where seasonal sea ice occurs, novel methods for design of such structures are needed. Specifically, the effect of ice-induced vibrations (IIVs) on fatigue life of the structures is currently poorly understood. Therefore, the goal of this paper is to analyze the current state-of-the-art approach for estimating the ice loads contribution to the fatigue life of OWTs and identify the current knowledge gaps. Moreover, the paper proposes a methodology for developing a combined load spectrum of wind, waves and ice using numerical simulations, with an ultimate goal to develop applicable Gaßner curves characterizing the variable-amplitude nature of the loading pattern. Finally, the use of small-scale fatigue tests under sub-zero temperatures in order to develop the appropriate S-N and Gaßner curves is discussed. Subject Fatigue life of OWTFatigue testsIce-induced vibrationsLow-temperature fatigueVariable-amplitude loading To reference this document use: http://resolver.tudelft.nl/uuid:4a30e2d3-f8d6-441f-bd37-6c2c8ced13d3 Embargo date 2022-08-09 Source International Conference on Ships and Offshore Structures ICSOS 2019 Event ICSOS 2019: 4th International Conference on Ships and Offshore Structures, 2019-11-04 → 2019-11-08, Cape Carnival, United States Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type conference paper Rights © 2019 Aleksandar-Saša Milaković, Moritz Braun, Tom Willems, H. Hendrikse, Claas Fischer, Sören Ehlers Files PDF 2019Milakovicetal.Methodo ... oadsof.pdf 1.45 MB Close viewer /islandora/object/uuid:4a30e2d3-f8d6-441f-bd37-6c2c8ced13d3/datastream/OBJ/view