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

Lam, K. Y. and Wang, Q. X. ORCID: https://orcid.org/0000-0003-0626-1538 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. ISSN 0889-9746


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.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 05 May 2022 23:39
Last Modified: 05 May 2022 23:40
Uncontrolled Keywords: boundary element method; failure analysis; finite element method; fluid-structure interaction; submarine pipeline
Fields of Research (2020): 49 MATHEMATICAL SCIENCES > 4903 Numerical and computational mathematics > 490302 Numerical analysis
40 ENGINEERING > 4015 Maritime engineering > 401501 Marine engineering
Identification Number or DOI: https://doi.org/10.1006/jfls.2002.0463
URI: http://eprints.usq.edu.au/id/eprint/47465

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