A coupled numerical approach for nonlinear dynamic fluid‐structure interaction analysis of a near‐bed submarine pipeline

Article

Gu, Y.T. and Wang, Q.. 2008. "A coupled numerical approach for nonlinear dynamic fluid‐structure interaction analysis of a near‐bed submarine pipeline." Engineering Computations: international journal for computer-aided engineering and software. 25 (6), pp. 569-588. https://doi.org/10.1108/02644400810891553
Article Title

A coupled numerical approach for nonlinear dynamic fluid‐structure interaction analysis of a near‐bed submarine pipeline

ERA Journal ID3666
Article CategoryArticle
AuthorsGu, Y.T. and Wang, Q.
Journal TitleEngineering Computations: international journal for computer-aided engineering and software
Journal Citation25 (6), pp. 569-588
Number of Pages20
Year2008
PublisherEmerald
Place of PublicationUnited Kingdom
ISSN0264-4401
1758-7077
Digital Object Identifier (DOI)https://doi.org/10.1108/02644400810891553
Web Address (URL)https://www.emerald.com/insight/content/doi/10.1108/02644400810891553/full/html
Abstract

Purpose
The purpose of this paper is to develop an effective numerical approach to assess the nonlinear dynamic responses of a near‐bed submarine pipeline.

Design/methodology/approach
A coupled numerical approach is proposed in this paper to assess the nonlinear dynamic responses of this pipeline. The boundary‐element method is first used to get the nonlinear dynamic fluid loading induced by the asymmetric flow. The meshless technique is used to discretize the structure of the pipeline. A numerical example is first presented to verify the effectivity of the present method. Then, the coupled technique is used to simulate the nonlinear dynamic fluid‐structure interaction problem of a near‐bed pipeline. A Newton‐Raphson iteration procedure is used herein to solve the nonlinear system of equations, and the Newmark method is adopted for the time integration.

Findings
The presence of seabed results in a large negative lift on a pipeline in a horizontal current. Studies reveal that there exists a critical current velocity, above which the pipeline will become instable, and the critical velocity is significantly affected by the initial gap from the pipeline to the seabed.

Originality/value
The near‐bed submarine pipeline is a widely used structure in marine engineering. This paper originally develops a numerical approach to model this special fluid‐structure interaction problem. It has demonstrated by the examples that the present approach is very effective and has good potential in the practical applications.

KeywordsPipelines; Numerical analysis; Flow; Structures; Underwater construction works; Meshes
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020490303. Numerical solution of differential and integral equations
Public Notes

The accessible file is the accepted version of the paper. Please refer to the URL for the published version.

Byline AffiliationsQueensland University of Technology
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