Oscillatory Forces on Square Cylinder and Cubes

E. D. Christensen; F. Nielsen; M. Borup

doi:10.18451/978-3-939230-64-9_085

Oscillatory Forces on Square Cylinder and Cubes

E. D. Christensen^*, F. Nielsen, M. Borup

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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Abstract

Large scale porous structures are a very common part of coastal and offshore structures such as breakwaters for coastal or harbors protection, and scour protection layers for offshore wind turbine foundations. Much research has been carried out on for instance breakwaters from a statistical point of view. This has led to design formulas. In this paper, we present an approach where the forces on large porous structures were measured directly. The goal was to investigate the variability of the wave forces on different structural elements depending on the spatial position in the protection layer. The study indicated that the elements or stones on the edge of a protection layer experienced the largest force away from the protection layer under the influence to an oscillatory outer flow (i.e. a simplification of wave dynamics). The KC-number ranged from 2 to 12. The results indicated a potentially spreading mechanism and explained instability of the outer positioned stones.

Original language	English
Title of host publication	Coastal Structures 2019
Editors	Nils Goseberg, Torsten Schlurmann
Place of Publication	Karlsruhe
Publisher	Bundesanstalt für Wasserbau
Publication date	2019
Pages	851-861
ISBN (Electronic)	978-3-939230-64-9
DOIs	https://doi.org/10.18451/978-3-939230-64-9_085
Publication status	Published - 2019
Event	Coastal Structures 2019 - Hannover, Germany Duration: 30 Sep 2019 → 2 Oct 2019

Conference

Conference	Coastal Structures 2019
Country	Germany
City	Hannover
Period	30/09/2019 → 02/10/2019

Bibliographical note

Documents in HENRY are made available under the Creative Commons License CC BY 4.0, if no other license is applicable. Under CC BY 4.0 commercial use and sharing, remixing, transforming, and building upon the material of the work is permitted. In some cases a different, more restrictive license may apply; if applicable the terms of the restrictive license will be binding.

Keywords

Oscillatory forces
Forces on cubes
Porous structures
Stone protection layer

Cite this

Christensen, E. D., Nielsen, F., & Borup, M. (2019). Oscillatory Forces on Square Cylinder and Cubes. In N. Goseberg, & T. Schlurmann (Eds.), Coastal Structures 2019 (pp. 851-861). Bundesanstalt für Wasserbau. https://doi.org/10.18451/978-3-939230-64-9_085

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title = "Oscillatory Forces on Square Cylinder and Cubes",

abstract = "Large scale porous structures are a very common part of coastal and offshore structures such as breakwaters for coastal or harbors protection, and scour protection layers for offshore wind turbine foundations. Much research has been carried out on for instance breakwaters from a statistical point of view. This has led to design formulas. In this paper, we present an approach where the forces on large porous structures were measured directly. The goal was to investigate the variability of the wave forces on different structural elements depending on the spatial position in the protection layer. The study indicated that the elements or stones on the edge of a protection layer experienced the largest force away from the protection layer under the influence to an oscillatory outer flow (i.e. a simplification of wave dynamics). The KC-number ranged from 2 to 12. The results indicated a potentially spreading mechanism and explained instability of the outer positioned stones.",

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author = "Christensen, {E. D.} and F. Nielsen and M. Borup",

note = "Documents in HENRY are made available under the Creative Commons License CC BY 4.0, if no other license is applicable. Under CC BY 4.0 commercial use and sharing, remixing, transforming, and building upon the material of the work is permitted. In some cases a different, more restrictive license may apply; if applicable the terms of the restrictive license will be binding.; Coastal Structures 2019 ; Conference date: 30-09-2019 Through 02-10-2019",

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N2 - Large scale porous structures are a very common part of coastal and offshore structures such as breakwaters for coastal or harbors protection, and scour protection layers for offshore wind turbine foundations. Much research has been carried out on for instance breakwaters from a statistical point of view. This has led to design formulas. In this paper, we present an approach where the forces on large porous structures were measured directly. The goal was to investigate the variability of the wave forces on different structural elements depending on the spatial position in the protection layer. The study indicated that the elements or stones on the edge of a protection layer experienced the largest force away from the protection layer under the influence to an oscillatory outer flow (i.e. a simplification of wave dynamics). The KC-number ranged from 2 to 12. The results indicated a potentially spreading mechanism and explained instability of the outer positioned stones.

AB - Large scale porous structures are a very common part of coastal and offshore structures such as breakwaters for coastal or harbors protection, and scour protection layers for offshore wind turbine foundations. Much research has been carried out on for instance breakwaters from a statistical point of view. This has led to design formulas. In this paper, we present an approach where the forces on large porous structures were measured directly. The goal was to investigate the variability of the wave forces on different structural elements depending on the spatial position in the protection layer. The study indicated that the elements or stones on the edge of a protection layer experienced the largest force away from the protection layer under the influence to an oscillatory outer flow (i.e. a simplification of wave dynamics). The KC-number ranged from 2 to 12. The results indicated a potentially spreading mechanism and explained instability of the outer positioned stones.

KW - Oscillatory forces

KW - Forces on cubes

KW - Porous structures

KW - Stone protection layer

U2 - 10.18451/978-3-939230-64-9_085

DO - 10.18451/978-3-939230-64-9_085

M3 - Article in proceedings

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EP - 861

BT - Coastal Structures 2019

A2 - Goseberg, Nils

A2 - Schlurmann, Torsten

PB - Bundesanstalt für Wasserbau

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10.18451/978-3-939230-64-9_085

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