Towing cylindrical fishing gear components on cohesive soils

Ana Ivanovic*, Finbarr G. O'Neill

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The analysis of penetration into cohesive soils of truncated rigid cylindrical objects that are associated with demersal trawl fishing is presented. Numerical simulations of three-dimensional models were performed using the finite element software ABAQUS to assess the influence that the dimensions, the weight, the cross-sectional geometry and the soil material properties have on penetration and drag. In general, over the parameter ranges examined; there is a non-linear increase in penetration and drag as the weight increases; there is a decrease in penetration and an associated reduction of drag as the Yield stress and Young's modulus increase; and the drag and penetration of aerofoil shaped cylinders are less than those of circular ones of similar weights and dimensions.

The non-dimensional form of the problem is examined and it is demonstrated that the penetration and drag values reduce respectively to expressions that are dependent solely, at least to a first order of approximation, on the non-dimensional weight, suggesting that the problem is essentially two-dimensional in nature and that three-dimensional effects at the edges of the clumps do not play a significant role.

We illustrate how these expressions can be used to evaluate the physical impact of towed gears and ultimately contribute to the development of fishing gears/techniques of reduced impact. (C) 2014 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)212-219
Number of pages8
JournalComputers and Geotechnics
Volume65
Early online date20 Jan 2015
DOIs
Publication statusPublished - Apr 2015

Keywords

  • soil structure interaction
  • numerical modelling
  • penetration
  • trawl fishing gears
  • towed rigid cylinders
  • impact
  • model

Cite this

Towing cylindrical fishing gear components on cohesive soils. / Ivanovic, Ana; O'Neill, Finbarr G.

In: Computers and Geotechnics, Vol. 65, 04.2015, p. 212-219.

Research output: Contribution to journalArticle

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title = "Towing cylindrical fishing gear components on cohesive soils",
abstract = "The analysis of penetration into cohesive soils of truncated rigid cylindrical objects that are associated with demersal trawl fishing is presented. Numerical simulations of three-dimensional models were performed using the finite element software ABAQUS to assess the influence that the dimensions, the weight, the cross-sectional geometry and the soil material properties have on penetration and drag. In general, over the parameter ranges examined; there is a non-linear increase in penetration and drag as the weight increases; there is a decrease in penetration and an associated reduction of drag as the Yield stress and Young's modulus increase; and the drag and penetration of aerofoil shaped cylinders are less than those of circular ones of similar weights and dimensions.The non-dimensional form of the problem is examined and it is demonstrated that the penetration and drag values reduce respectively to expressions that are dependent solely, at least to a first order of approximation, on the non-dimensional weight, suggesting that the problem is essentially two-dimensional in nature and that three-dimensional effects at the edges of the clumps do not play a significant role.We illustrate how these expressions can be used to evaluate the physical impact of towed gears and ultimately contribute to the development of fishing gears/techniques of reduced impact. (C) 2014 Elsevier Ltd. All rights reserved.",
keywords = "soil structure interaction, numerical modelling, penetration, trawl fishing gears, towed rigid cylinders, impact, model",
author = "Ana Ivanovic and O'Neill, {Finbarr G.}",
note = "Acknowledgement The authors would like to thank Moosa Esmaeili for his assistance in formation/generation of numerical models.",
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AU - O'Neill, Finbarr G.

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N2 - The analysis of penetration into cohesive soils of truncated rigid cylindrical objects that are associated with demersal trawl fishing is presented. Numerical simulations of three-dimensional models were performed using the finite element software ABAQUS to assess the influence that the dimensions, the weight, the cross-sectional geometry and the soil material properties have on penetration and drag. In general, over the parameter ranges examined; there is a non-linear increase in penetration and drag as the weight increases; there is a decrease in penetration and an associated reduction of drag as the Yield stress and Young's modulus increase; and the drag and penetration of aerofoil shaped cylinders are less than those of circular ones of similar weights and dimensions.The non-dimensional form of the problem is examined and it is demonstrated that the penetration and drag values reduce respectively to expressions that are dependent solely, at least to a first order of approximation, on the non-dimensional weight, suggesting that the problem is essentially two-dimensional in nature and that three-dimensional effects at the edges of the clumps do not play a significant role.We illustrate how these expressions can be used to evaluate the physical impact of towed gears and ultimately contribute to the development of fishing gears/techniques of reduced impact. (C) 2014 Elsevier Ltd. All rights reserved.

AB - The analysis of penetration into cohesive soils of truncated rigid cylindrical objects that are associated with demersal trawl fishing is presented. Numerical simulations of three-dimensional models were performed using the finite element software ABAQUS to assess the influence that the dimensions, the weight, the cross-sectional geometry and the soil material properties have on penetration and drag. In general, over the parameter ranges examined; there is a non-linear increase in penetration and drag as the weight increases; there is a decrease in penetration and an associated reduction of drag as the Yield stress and Young's modulus increase; and the drag and penetration of aerofoil shaped cylinders are less than those of circular ones of similar weights and dimensions.The non-dimensional form of the problem is examined and it is demonstrated that the penetration and drag values reduce respectively to expressions that are dependent solely, at least to a first order of approximation, on the non-dimensional weight, suggesting that the problem is essentially two-dimensional in nature and that three-dimensional effects at the edges of the clumps do not play a significant role.We illustrate how these expressions can be used to evaluate the physical impact of towed gears and ultimately contribute to the development of fishing gears/techniques of reduced impact. (C) 2014 Elsevier Ltd. All rights reserved.

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