Parametric solution of lateral buckling of submarine pipelines
Parametric solution of lateral buckling of submarine pipelines
Lateral buckling analysis of on-bottom submarine pipelines is of particular interest in the offshore industry due to the complexities involved in the analysis, and the potential design efficiencies that can be unlocked. Classical buckling theories by previous researchers and recent joint industry projects provide a basis for estimation of the critical buckling load of a straight, or in some cases imperfect, pipe on either a rigid or elastic seabed. However, systematic solutions for the combined effects of nonlinear soil properties and the as-laid geometry – specifically the out-of-straightness – on the buckle initiation behaviour have not been developed previously. This paper reports an investigation of the buckling problem of an imperfect (non-straight) on-bottom pipeline subjected to axial compressive loading. The seabed was modelled with lateral and axial nonlinear, springs to idealise the load-displacement behaviour of the soil and the pipe was modelled with pipe elements. Buckling was performed by a displacement controlled finite element method with the modified Riks algorithm that is available in the commercial software ABAQUS. This numerical tool was used to develop a parametric solution for the present problem in terms of the various pipe material and geometry parameters and the lateral and axial pipe-soil interaction parameters. In particular, the influence of the magnitude and stiffness of the lateral pipe-soil response was investigated, highlighting the sensitivity of the pipeline response to the geotechnical inputs. The results have been synthesised in a generic non-dimensionalised design chart to estimate the buckling load, valid for the range of inputs covered by the parametric study.
submarine pipelines, buckling, soil response, out-of-straightness, RIKS
Guha, Indranil
1ba88002-5df6-4ece-a7a1-312cf699fac0
White, David
a986033d-d26d-4419-a3f3-20dc54efce93
Randolph, Mark
05c8dec9-cf94-42ef-8b4c-82bce017c82a
1 May 2020
Guha, Indranil
1ba88002-5df6-4ece-a7a1-312cf699fac0
White, David
a986033d-d26d-4419-a3f3-20dc54efce93
Randolph, Mark
05c8dec9-cf94-42ef-8b4c-82bce017c82a
Guha, Indranil, White, David and Randolph, Mark
(2020)
Parametric solution of lateral buckling of submarine pipelines.
Applied Ocean Research, 98, [102077].
(doi:10.1016/j.apor.2020.102077).
Abstract
Lateral buckling analysis of on-bottom submarine pipelines is of particular interest in the offshore industry due to the complexities involved in the analysis, and the potential design efficiencies that can be unlocked. Classical buckling theories by previous researchers and recent joint industry projects provide a basis for estimation of the critical buckling load of a straight, or in some cases imperfect, pipe on either a rigid or elastic seabed. However, systematic solutions for the combined effects of nonlinear soil properties and the as-laid geometry – specifically the out-of-straightness – on the buckle initiation behaviour have not been developed previously. This paper reports an investigation of the buckling problem of an imperfect (non-straight) on-bottom pipeline subjected to axial compressive loading. The seabed was modelled with lateral and axial nonlinear, springs to idealise the load-displacement behaviour of the soil and the pipe was modelled with pipe elements. Buckling was performed by a displacement controlled finite element method with the modified Riks algorithm that is available in the commercial software ABAQUS. This numerical tool was used to develop a parametric solution for the present problem in terms of the various pipe material and geometry parameters and the lateral and axial pipe-soil interaction parameters. In particular, the influence of the magnitude and stiffness of the lateral pipe-soil response was investigated, highlighting the sensitivity of the pipeline response to the geotechnical inputs. The results have been synthesised in a generic non-dimensionalised design chart to estimate the buckling load, valid for the range of inputs covered by the parametric study.
Text
Guha et al 2020 AM (002)
More information
Accepted/In Press date: 31 January 2020
e-pub ahead of print date: 18 March 2020
Published date: 1 May 2020
Keywords:
submarine pipelines, buckling, soil response, out-of-straightness, RIKS
Identifiers
Local EPrints ID: 439455
URI: http://eprints.soton.ac.uk/id/eprint/439455
ISSN: 0141-1187
PURE UUID: 2ade5ca8-61dc-429e-9e7f-f977dd63c4be
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Date deposited: 23 Apr 2020 16:44
Last modified: 17 Mar 2024 05:28
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Author:
Indranil Guha
Author:
Mark Randolph
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