Solutions for downslope pipeline walking on a seabed with a peaky trilinear soil resistance model
Solutions for downslope pipeline walking on a seabed with a peaky trilinear soil resistance model
Offshore pipelines used for transporting hydrocarbons are cyclically loaded by great variations of pressure and temperature. These variations can induce axial instability in such pipelines. This instability may cause the pipelines to migrate globally along their length; an effect known as pipeline walking. Traditional models of pipeline walking have considered the axial soil response as rigid-plastic (RP); however, such behavior does not match observations from physical soil tests. It leads to inaccurate estimates of walking rate (WR) per cycle and over design. In this paper, a trilinear (3L) soil resistance model is used to represent seabed resistance to investigate the behavior of pipeline walking. Different parameters, i.e., shapes and properties of trilinearity (within the peaky soil model type), have been considered leading to a closed-form solution. This solution improves the understanding of the main properties involved in the peaky trilinear soil behavior by providing a set of analytical expressions for pipe walking, which were benchmarked and validated against a set of finite element analyses.
axial resistance, finite element modeling, offshore engineering, pipe-soil interaction, pipeline walking
Castelo, Adriano
3a38834f-a2b0-4f54-a457-026ec50a7a68
White, David
a986033d-d26d-4419-a3f3-20dc54efce93
Tian, Yinghui
f7bbae79-c2c1-4a75-acc1-fb9606be92fb
1 April 2021
Castelo, Adriano
3a38834f-a2b0-4f54-a457-026ec50a7a68
White, David
a986033d-d26d-4419-a3f3-20dc54efce93
Tian, Yinghui
f7bbae79-c2c1-4a75-acc1-fb9606be92fb
Castelo, Adriano, White, David and Tian, Yinghui
(2021)
Solutions for downslope pipeline walking on a seabed with a peaky trilinear soil resistance model.
Journal of Offshore Mechanics and Arctic Engineering, 143 (2), [022101].
(doi:10.1115/1.4048331).
Abstract
Offshore pipelines used for transporting hydrocarbons are cyclically loaded by great variations of pressure and temperature. These variations can induce axial instability in such pipelines. This instability may cause the pipelines to migrate globally along their length; an effect known as pipeline walking. Traditional models of pipeline walking have considered the axial soil response as rigid-plastic (RP); however, such behavior does not match observations from physical soil tests. It leads to inaccurate estimates of walking rate (WR) per cycle and over design. In this paper, a trilinear (3L) soil resistance model is used to represent seabed resistance to investigate the behavior of pipeline walking. Different parameters, i.e., shapes and properties of trilinearity (within the peaky soil model type), have been considered leading to a closed-form solution. This solution improves the understanding of the main properties involved in the peaky trilinear soil behavior by providing a set of analytical expressions for pipe walking, which were benchmarked and validated against a set of finite element analyses.
Text
Castelo et al 2021 AM
- Accepted Manuscript
More information
Accepted/In Press date: 27 June 2020
e-pub ahead of print date: 5 October 2020
Published date: 1 April 2021
Additional Information:
Funding Information:
This research forms part of the activities of the Centre for Offshore Foundation Systems (COFS). The authors acknowledge support from The University of Western Australia, Shell, and the Australian Research Council.
Publisher Copyright:
Copyright © 2021 by ASME.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
Keywords:
axial resistance, finite element modeling, offshore engineering, pipe-soil interaction, pipeline walking
Identifiers
Local EPrints ID: 450224
URI: http://eprints.soton.ac.uk/id/eprint/450224
ISSN: 0892-7219
PURE UUID: c955bf24-1f53-46aa-9f55-09c1aa7f2a2b
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Date deposited: 16 Jul 2021 16:33
Last modified: 18 Mar 2024 03:42
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Author:
Adriano Castelo
Author:
Yinghui Tian
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