Sinking of armour layer around a cylinder exposed to a current

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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@article{4c1672f6104744c9b930ab2b6d843727,
title = "Sinking of armour layer around a cylinder exposed to a current",
publisher = "Thomas/Telford Ltd.",
author = "Nielsen, {Anders Wedel} and Sumer, {B. Mutlu} and Jørgen Fredsøe and Christensen, {Erik Damgaard}",
year = "2011",
doi = "10.1680/maen.2011.164.4.159",
volume = "164",
number = "4",
pages = "159--172",
journal = "Institution of Civil Engineers. Proceedings. Maritime Engineering",
issn = "1741-7597",

}

RIS

TY - JOUR

T1 - Sinking of armour layer around a cylinder exposed to a current

A1 - Nielsen,Anders Wedel

A1 - Sumer,B. Mutlu

A1 - Fredsøe,Jørgen

A1 - Christensen,Erik Damgaard

AU - Nielsen,Anders Wedel

AU - Sumer,B. Mutlu

AU - Fredsøe,Jørgen

AU - Christensen,Erik Damgaard

PB - Thomas/Telford Ltd.

PY - 2011

Y1 - 2011

N2 - The flow processes in a scour protection around a monopile in steady current are described in relation to transport of sediment in the scour protection based on physical model tests. The scour protection consisted of uniformly distributed coarse stones without filter layer. Transport of sediment in the scour protection may cause sinking of the scour protection. This may reduce the stability of the monopile and change for instance the natural frequency of the dynamic response of an offshore wind turbine in an unfavourable manner. The most important flow process with regard to transport of sediment and sinking of the scour protection is found to be the horseshoe vortex. It is found that a larger pile diameter relative to the size of the protection stones will cause a larger sinking and that two layers of stones will decrease the sinking relative to one layer of stones with the same size.

AB - The flow processes in a scour protection around a monopile in steady current are described in relation to transport of sediment in the scour protection based on physical model tests. The scour protection consisted of uniformly distributed coarse stones without filter layer. Transport of sediment in the scour protection may cause sinking of the scour protection. This may reduce the stability of the monopile and change for instance the natural frequency of the dynamic response of an offshore wind turbine in an unfavourable manner. The most important flow process with regard to transport of sediment and sinking of the scour protection is found to be the horseshoe vortex. It is found that a larger pile diameter relative to the size of the protection stones will cause a larger sinking and that two layers of stones will decrease the sinking relative to one layer of stones with the same size.

U2 - 10.1680/maen.2011.164.4.159

DO - 10.1680/maen.2011.164.4.159

JO - Institution of Civil Engineers. Proceedings. Maritime Engineering

JF - Institution of Civil Engineers. Proceedings. Maritime Engineering

SN - 1741-7597

IS - 4

VL - 164

SP - 159

EP - 172

ER -