A Study on Local Scour of Large-Diameter Monopile under Combined Waves and Current

Hanqiu Liu, Zijian Tao, Rongsheng Zhang, Cailiang Zhang, Xiang Sun, Shaotao Fan and Ronghua Zhu ()
Additional contact information
Hanqiu Liu: Ocean College, Zhejiang University, Zhoushan 316000, China
Zijian Tao: Ocean College, Zhejiang University, Zhoushan 316000, China
Rongsheng Zhang: Ocean College, Zhejiang University, Zhoushan 316000, China
Cailiang Zhang: Ocean College, Zhejiang University, Zhoushan 316000, China
Xiang Sun: Yangjiang Offshore Wind Energy Laboratory, Yangjiang 529500, China
Shaotao Fan: School of Naval Architecture, Ocean and Energy Power Engineering, Wuhan University of Technology, Wuhan 430063, China
Ronghua Zhu: Ocean College, Zhejiang University, Zhoushan 316000, China

Sustainability, 2023, vol. 15, issue 7, 1-13

Abstract: The complex-load environment of offshore monopile foundations makes the combination of waves and current, and the variation in water depth, important factors for local scour. A flume test model of flow–pile–soil coupling for large-diameter monopile foundations is established, which comprehensively considers the combined reciprocating action of wave/current and the influence of tide depth. The precision of the experiment is ensured by the extension method of series models. The results show that the local scour caused by tides and the wave–current combination is obviously different from the unidirectional wave–current combination. The equilibrium scour depth obtained by the test is found to have some deviation from the predicted scour-depth equation. The maximum scour depth decreased with the increase in water depth within the range of 3 to 6 times the pile diameter. The bed shear-stress equation was generally consistent with the scouring-depth rule measured by the model, which can be considered to evaluate the rationality of the test results.

Keywords: offshore wind turbine; monopile foundation; flume test; combined waves and current; equilibrium scour depth; bed shear stress (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/7/5746/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/7/5746/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:15:y:2023:i:7:p:5746-:d:1107081

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().