A nonlinear fluid-structure interaction analysis of a near-bed submarine pipeline in a current

Article

Lam, K. Y., Wang, Q. X. and Zong, Z.. 2002. "A nonlinear fluid-structure interaction analysis of a near-bed submarine pipeline in a current." Journal of Fluids and Structures. 16 (8), pp. 1177-1191. https://doi.org/10.1006/jfls.2002.0463
Article Title

A nonlinear fluid-structure interaction analysis of a near-bed submarine pipeline in a current

ERA Journal ID3687
Article CategoryArticle
AuthorsLam, K. Y. (Author), Wang, Q. X. (Author) and Zong, Z. (Author)
Journal TitleJournal of Fluids and Structures
Journal Citation16 (8), pp. 1177-1191
Number of Pages15
Year2002
Place of PublicationUnited Kingdom
ISSN0889-9746
1095-8622
Digital Object Identifier (DOI)https://doi.org/10.1006/jfls.2002.0463
Web Address (URL)https://www.sciencedirect.com/science/article/abs/pii/S0889974602904639
Abstract

A negative lift force (attraction) can be induced on a near-bed pipeline in a horizontal current due to asymmetric flow. This negative lift force has a significant influence on the behaviour of the near-bed pipeline, causing two remarkable failure patterns. One failure pattern is due to stability loss, and the pipeline fully rests on the seabed. The other is due to the excessive stress or deformation even if the pipeline is stable in a position between the original equilibrium position and the seabed. A quantitative method to assess these two failure patterns by combining boundary element and finite element methods is proposed in this paper. This is a nonlinear fluid-structure interaction problem, and an iteration procedure is used herein to solve it. Numerical examples reveal that there exists a critical current velocity, above which the pipeline fails. The relationship between the critical velocity and the distance from the pipeline to the seabed is given.

Keywordsboundary element method; failure analysis; finite element method; fluid-structure interaction; submarine pipeline
ANZSRC Field of Research 2020490302. Numerical analysis
401501. Marine engineering
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Byline AffiliationsInstitute of High Performance Computing, Singapore
Institution of OriginUniversity of Southern Queensland
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