Abstract
As a result of more stable wind conditions and the depletion of near-shore locations, wind farms are moving farther offshore into deeper waters, challenging the current limits of offshore heavy-lift operations. This paper presents and verifies a novel frequency-domain framework to perform extensive site-specific analysis, of floating installations of wind-turbine towers, subjected to wind and wave loads. The versatility and potential of this framework is demonstrated with a case-study of a wind farm near the coast of Portugal. The results lead to the following conclusions: (1) Only considering beam-seas the yearly workability is 39 %; (2) Workability is mostly limited by wave loads; (3) Tower motions tend to decrease with tower size and are not significantly affected by hook-tower distance (sling length); and finally, (4) In this case-study the most contributing frequencies for tower motions are 0.3 and 0.4 rad/s, corresponding mainly to the first pendulation mode.
Original language | English |
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Article number | 116952 |
Number of pages | 11 |
Journal | Ocean Engineering |
Volume | 297 |
DOIs | |
Publication status | Published - 2024 |
Funding
This work is part of the “DOT 6000 - Floating Offshore installation XXL wind turbines”, where Delft Offshore Turbine B.V., Heerema Marine Contractors Nederland SE and Techische Universiteit Delft have teamed up. Funding was provided by RVO , with the grant number TEHE119004 . We further would like to acknowledge Rolf van Huffelen and Alejandro Velez Isaza, for supporting this research with their technical expertise in the field of offshore heavy-lift operations.Keywords
- Dynamic error budgeting
- Heavy lift
- Offshore wind
- Sensitivity analysis
- Stochastic disturbances
- Workability analysis
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Prometheus: An Open-Source SSCV
Fidalgo Domingos, D. A. (Creator), Wellens, P. R. (Creator) & van Wingerden, J. W. (Creator), TU Delft - 4TU.ResearchData, 28 Feb 2024
DOI: 10.4121/aa0a24fc-b7e2-4e05-b0cb-f1dc2af1c9ac
Dataset/Software: Dataset