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Numerical simulations of dynamic embedment during pipe laying on soft clay

Numerical simulations of dynamic embedment during pipe laying on soft clay
Numerical simulations of dynamic embedment during pipe laying on soft clay

Prediction of the as-laid embedment of a pipeline, which affects many aspects of pipeline design, is complicated by the dynamic motions that occur during the lay process. These motions cause pipelines to embed deeper than predicted based on static penetration models, as the seabed soils are both softened and physically displaced by the pipeline motion. This paper describes the results of 2D numerical analyses using a large displacement finite element approach aimed at quantifying pipeline embedment due to cyclic lateral motion at various fixed vertical load levels. The validity of the numerical results is first assessed by comparison with published data from centrifuge model tests in two different types of clay. A parametric study varying the normalized vertical load is then presented, which suggests a simple approach for estimating an upper limit to the dynamic embedment.

119-127
The American Society of Mechanical Engineers
Wang, D.
8c543acd-825f-4f34-948a-dcd2e289f0aa
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93
Randolph, M.F.
75caa33a-e630-4ae8-84cd-758797bf9633
Wang, D.
8c543acd-825f-4f34-948a-dcd2e289f0aa
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93
Randolph, M.F.
75caa33a-e630-4ae8-84cd-758797bf9633

Wang, D., White, D.J. and Randolph, M.F. (2009) Numerical simulations of dynamic embedment during pipe laying on soft clay. In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. vol. 3, The American Society of Mechanical Engineers. pp. 119-127 . (doi:10.1115/OMAE2009-79199).

Record type: Conference or Workshop Item (Paper)

Abstract

Prediction of the as-laid embedment of a pipeline, which affects many aspects of pipeline design, is complicated by the dynamic motions that occur during the lay process. These motions cause pipelines to embed deeper than predicted based on static penetration models, as the seabed soils are both softened and physically displaced by the pipeline motion. This paper describes the results of 2D numerical analyses using a large displacement finite element approach aimed at quantifying pipeline embedment due to cyclic lateral motion at various fixed vertical load levels. The validity of the numerical results is first assessed by comparison with published data from centrifuge model tests in two different types of clay. A parametric study varying the normalized vertical load is then presented, which suggests a simple approach for estimating an upper limit to the dynamic embedment.

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More information

Published date: 2009
Venue - Dates: 28th International Conference on Ocean, Offshore and Arctic Engineering, Honolulu, USA, Honolulu, United States, 2009-05-31 - 2009-06-05

Identifiers

Local EPrints ID: 419873
URI: http://eprints.soton.ac.uk/id/eprint/419873
PURE UUID: dd6190f7-5628-436a-ad05-7050f6515c8a
ORCID for D.J. White: ORCID iD orcid.org/0000-0002-2968-582X

Catalogue record

Date deposited: 23 Apr 2018 16:30
Last modified: 16 Mar 2024 04:32

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Contributors

Author: D. Wang
Author: D.J. White ORCID iD
Author: M.F. Randolph

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