Projects per year
Abstract
The offshore deployment of floating offshore structures such as wind turbines or wave energy converters is expected to strongly increase during the next decade, to face the appetite for green energy sources. The growing size of these structures’ dimensions, inducing very large mooring forces, makes the anchoring solution adopted a critical issue for the commercial success of floating marine energy farms. The upscaling of the screw anchor technology from onshore to the offshore environment has been recently proposed as an efficient way of providing a large tension capacity while their installation generates far less noise and vibrations than impact pile driving. Most of recent studies on screw anchors have focused on separated geotechnical problems such as their uplift capacity or installation requirements. This paper incorporates within a single procedure geotechnical and structural constraints to calculate the optimal anchor geometry able to maximise the uplift capacity available. Performance envelopes for screw anchors have been derived in a parametric study, covering a broad range of soil conditions as well as in a case study, representative of offshore conditions. Results show that single screw anchors are more efficient (e.g. shorter and lighter) than driven piles to sustain tension loading. The results presented in this study support the applicability of screw anchors to be used as part of the mooring system for wave energy converters. However, tension requirements for tension-leg platform wind turbines would probably require the use of group of anchors.
Original language | English |
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Article number | 108010 |
Number of pages | 15 |
Journal | Ocean Engineering |
Volume | 217 |
Early online date | 10 Oct 2020 |
DOIs | |
Publication status | Published - 1 Dec 2020 |
Keywords
- Screw piles
- Screw anchor
- Sand
- Torque
- Renewable energy
- Offshore geotechnics
- Screw anchors
- Anchor design
ASJC Scopus subject areas
- General Engineering
- Civil and Structural Engineering
- Ocean Engineering
- Environmental Engineering
Fingerprint
Dive into the research topics of 'Optimised design of screw anchors in tension in sand for renewable energy applications'. Together they form a unique fingerprint.Projects
- 2 Finished
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Development of Screw Anchors for Floating Marine Renewable Energy Systems Arrays Incorporating Anchor Sharing (SAFS) (Joint with University of Liege)
Brown, M. (Investigator), Cerfontaine, B. (Investigator) & Knappett, J. (Investigator)
COMMISSION OF THE EUROPEAN COMMUNITIES
1/08/17 → 31/07/19
Project: Research
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Supergen Wind Challenge 2015: Screw Piles for Wind Energy Foundation Systems (Joint with Universities of Durham and Southampton)
Brennan, A. (Investigator), Brown, M. (Investigator) & Knappett, J. (Investigator)
Engineering and Physical Sciences Research Council
26/02/16 → 25/07/19
Project: Research
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Centrifuge Modeling of the Installation Advancement Ratio Effect on the Cyclic Response of a Single-Helix Screw Pile for Floating Offshore Wind
Wang, W. (Lead / Corresponding author), Brown, M., Sharif, Y., Davidson, C. & Ciantia, M., 1 Jan 2025, In: Journal of Geotechnical and Geoenvironmental Engineering. 151, 1, 18 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile26 Downloads (Pure) -
Physical modelling of deep screw piles in medium-dense sands for floating wind applications
Jawid, T., Brown, M., Davidson, C., Sharif, Y., Wang, W., Shepherd, C., Buckley, R. & Whyte, S., Oct 2024, Proceedings of the 5th ECPMG 2024: 5th European Conference on Modelling in Geotechnics. International Society for Soil Mechanics and Geotechnical Engineering, 7 p.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
Open AccessFile20 Downloads (Pure) -
3D numerical analysis of screw pile subjected to axial compressive and lateral load
Kumar, P. V. P., Patra, S., Haldar, S., Brown, M. J., Knappett, J. A. & Sharif, Y. U., 1 Jan 2023, Soil Dynamics, Earthquake and Computational Geotechnical Engineering : Proceedings of the Indian Geotechnical Conference 2021 Volume 5. Muthukkumaran, K., Ayothiraman, R. & Kolathayar, S. (eds.). Singapore: Springer , Vol. 5. p. 75-85 11 p. (Lecture Notes in Civil Engineering; vol. 300).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
Open AccessFile74 Downloads (Pure)
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External PhD examiner University of Western Australia, Pierre-Yves Guy Duverneuil: The response of helical anchors under offshore environmental loading
Brown, M. (Examiner)
29 May 2024Activity: Examination types › Examination
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Keynote presentation: GEOLAB’s Second Next Generation Training Workshop
Brown, M. (Speaker)
18 Nov 2022Activity: Talk or presentation types › Invited talk
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Invited speaker, NGI, Norway: Virtual laboratory testing and its applications within offshore wind industry
Brown, M. (Speaker)
22 Sept 2022 → 23 Sept 2022Activity: Talk or presentation types › Invited talk
Press/Media
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How we stop floating wind turbines the size of skyscrapers from drifting away
23/05/23
1 Media contribution
Press/Media: Research
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UMACK bolsters anchoring expertise with University of Dundee partnership
14/06/21
1 item of Media coverage
Press/Media: Research
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Pioneering UMACK mooring and anchoring project partners with University of Dundee
14/06/21
1 Media contribution
Press/Media: Research