Spatio-temporal analysis of scour around complex offshore foundations under clear water and live bed conditions

Research output: Contribution to journalArticleResearchpeer review

View graph of relations

Details

Original languageEnglish
Article number117042
Number of pages14
JournalOcean engineering
Volume298
Early online date22 Feb 2024
Publication statusPublished - 15 Apr 2024

Abstract

This study investigates scour around offshore wind foundations, focusing on two complex structures with varying degrees of flow blockage: a novel hybrid gravity-based jacket (structure “A") and a conventional four-legged jacket (structure “B"). As offshore structures like jackets become more prevalent, mainly due to their structural stability and growth of offshore wind energy in general, understanding scouring phenomena around complex structures is crucial. Laboratory tests under steady flow clear-water and live-bed conditions, with measurements of 3D laser scans for test durations of 15, 90, and 420 min were conducted. In addition the scour development over time was measured and analyzed with eight echo sounders. The findings confirm that scouring around complex structures displays significant variability in dependency of the structure type, making standardization a challenging task. However, some common trends can be derived. Under live-bed conditions, both types of structures exhibit global erosion, regardless of the complexity or flow obstruction of the structure. The spatial erosion depth, relative to the footprint, is markedly higher (2.5 times) for the gravity-based structure as opposed to the jacket structure. In clear-water conditions, no global scour was observed for both structures and a very similar spatial erosion depth was reached after 420 min.

Keywords

    Erosion patterns, Jacket, Laboratory tests, Scour, Sediment transport

ASJC Scopus subject areas

Cite this

Spatio-temporal analysis of scour around complex offshore foundations under clear water and live bed conditions. / Welzel, Mario; Schendel, Alexander; Satari, Ramish et al.
In: Ocean engineering, Vol. 298, 117042, 15.04.2024.

Research output: Contribution to journalArticleResearchpeer review

Welzel M, Schendel A, Satari R, Neuweiler I, Schlurmann T. Spatio-temporal analysis of scour around complex offshore foundations under clear water and live bed conditions. Ocean engineering. 2024 Apr 15;298:117042. Epub 2024 Feb 22. doi: 10.1016/j.oceaneng.2024.117042
Download
@article{7cb34eea4e5348719997dc26d92049b2,
title = "Spatio-temporal analysis of scour around complex offshore foundations under clear water and live bed conditions",
abstract = "This study investigates scour around offshore wind foundations, focusing on two complex structures with varying degrees of flow blockage: a novel hybrid gravity-based jacket (structure “A{"}) and a conventional four-legged jacket (structure “B{"}). As offshore structures like jackets become more prevalent, mainly due to their structural stability and growth of offshore wind energy in general, understanding scouring phenomena around complex structures is crucial. Laboratory tests under steady flow clear-water and live-bed conditions, with measurements of 3D laser scans for test durations of 15, 90, and 420 min were conducted. In addition the scour development over time was measured and analyzed with eight echo sounders. The findings confirm that scouring around complex structures displays significant variability in dependency of the structure type, making standardization a challenging task. However, some common trends can be derived. Under live-bed conditions, both types of structures exhibit global erosion, regardless of the complexity or flow obstruction of the structure. The spatial erosion depth, relative to the footprint, is markedly higher (2.5 times) for the gravity-based structure as opposed to the jacket structure. In clear-water conditions, no global scour was observed for both structures and a very similar spatial erosion depth was reached after 420 min.",
keywords = "Erosion patterns, Jacket, Laboratory tests, Scour, Sediment transport",
author = "Mario Welzel and Alexander Schendel and Ramish Satari and Insa Neuweiler and Torsten Schlurmann",
note = "Funding Information: This study has been carried out within the Collaborative Research Center (CRC) 1463 “Integrated design and operation methodology for offshore megastructures” and is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – SFB 1463–434502799. As well as within the project TEXBASE (KF 3316902Kl4) which was funded by the ZIM program “Zentrales Innovationsprogramm Mittelstand” which is a funding programme of the BMWK (Federal Ministry for Economic Affairs and Climate Action). ",
year = "2024",
month = apr,
day = "15",
doi = "10.1016/j.oceaneng.2024.117042",
language = "English",
volume = "298",
journal = "Ocean engineering",
issn = "0029-8018",
publisher = "Elsevier BV",

}

Download

TY - JOUR

T1 - Spatio-temporal analysis of scour around complex offshore foundations under clear water and live bed conditions

AU - Welzel, Mario

AU - Schendel, Alexander

AU - Satari, Ramish

AU - Neuweiler, Insa

AU - Schlurmann, Torsten

N1 - Funding Information: This study has been carried out within the Collaborative Research Center (CRC) 1463 “Integrated design and operation methodology for offshore megastructures” and is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – SFB 1463–434502799. As well as within the project TEXBASE (KF 3316902Kl4) which was funded by the ZIM program “Zentrales Innovationsprogramm Mittelstand” which is a funding programme of the BMWK (Federal Ministry for Economic Affairs and Climate Action).

PY - 2024/4/15

Y1 - 2024/4/15

N2 - This study investigates scour around offshore wind foundations, focusing on two complex structures with varying degrees of flow blockage: a novel hybrid gravity-based jacket (structure “A") and a conventional four-legged jacket (structure “B"). As offshore structures like jackets become more prevalent, mainly due to their structural stability and growth of offshore wind energy in general, understanding scouring phenomena around complex structures is crucial. Laboratory tests under steady flow clear-water and live-bed conditions, with measurements of 3D laser scans for test durations of 15, 90, and 420 min were conducted. In addition the scour development over time was measured and analyzed with eight echo sounders. The findings confirm that scouring around complex structures displays significant variability in dependency of the structure type, making standardization a challenging task. However, some common trends can be derived. Under live-bed conditions, both types of structures exhibit global erosion, regardless of the complexity or flow obstruction of the structure. The spatial erosion depth, relative to the footprint, is markedly higher (2.5 times) for the gravity-based structure as opposed to the jacket structure. In clear-water conditions, no global scour was observed for both structures and a very similar spatial erosion depth was reached after 420 min.

AB - This study investigates scour around offshore wind foundations, focusing on two complex structures with varying degrees of flow blockage: a novel hybrid gravity-based jacket (structure “A") and a conventional four-legged jacket (structure “B"). As offshore structures like jackets become more prevalent, mainly due to their structural stability and growth of offshore wind energy in general, understanding scouring phenomena around complex structures is crucial. Laboratory tests under steady flow clear-water and live-bed conditions, with measurements of 3D laser scans for test durations of 15, 90, and 420 min were conducted. In addition the scour development over time was measured and analyzed with eight echo sounders. The findings confirm that scouring around complex structures displays significant variability in dependency of the structure type, making standardization a challenging task. However, some common trends can be derived. Under live-bed conditions, both types of structures exhibit global erosion, regardless of the complexity or flow obstruction of the structure. The spatial erosion depth, relative to the footprint, is markedly higher (2.5 times) for the gravity-based structure as opposed to the jacket structure. In clear-water conditions, no global scour was observed for both structures and a very similar spatial erosion depth was reached after 420 min.

KW - Erosion patterns

KW - Jacket

KW - Laboratory tests

KW - Scour

KW - Sediment transport

UR - http://www.scopus.com/inward/record.url?scp=85185536258&partnerID=8YFLogxK

U2 - 10.1016/j.oceaneng.2024.117042

DO - 10.1016/j.oceaneng.2024.117042

M3 - Article

AN - SCOPUS:85185536258

VL - 298

JO - Ocean engineering

JF - Ocean engineering

SN - 0029-8018

M1 - 117042

ER -

By the same author(s)