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A further study on the scour around the monopile foundation of offshore wind turbines

Lookup NU author(s): Dr Wenxian YangORCiD, Fei Geng

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

Foundation scour has long been a concern in the offshore wind industry as it poses a great threat to the safety of offshore wind turbines (OWTs). However, the current understanding of this issue is still insufficient. This is because many offshore wind farm factors and their coupling effect on scour have not been fully investigated. Therefore, two phases of experimental studies are conducted in this paper to investigate how monopile vibration, water flow, and intermittent operation of OWTs work together to affect the scour around the monopile foundation. The research results have shown that in the absence of water flow, monopile vibration can also create ‘scour pits’ while causing soil densification. The coupling of a large-amplitude monopile vibration and the water flow will exacerbate the scour, while the coupling of a small-amplitude monopile vibration and the water flow will retard the scour. The vibration amplitude has a greater influence on the scour than the vibration frequency. In addition, vibration sequence was found to have a significant effect on the scour, but despite the sequence, repeated application and removal of monopile vibration, which represents the intermittent operation of OWTs, can lead to severe foundation scour.


Publication metadata

Author(s): Qin B, Xie Y, Yang W, Qu R, Geng F

Publication type: Article

Publication status: Published

Journal: Sustainable Energy Technologies and Assessments

Year: 2023

Volume: 57

Online publication date: 01/06/2023

Acceptance date: 30/03/2023

Date deposited: 02/04/2023

ISSN (print): 2213-1388

ISSN (electronic): 2213-1396

Publisher: Elsevier

URL: https://doi.org/10.1016/j.seta.2023.103198

DOI: 10.1016/j.seta.2023.103198

ePrints DOI: 10.57711/echh-zy11


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Funding

Funder referenceFunder name
12002125
2020JJ6020
202106220076
CX20211267

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