New model for vortex-induced vibration of catenary riser

Narakorn Srinil*, Marian Wiercigroch, Patrick O'Brien, Michael Lane

*Corresponding author for this work

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

This paper presents a new theoretical model capable of predicting the vortex-induced vibration response of a steel catenary riser subject to a steady uniform current. The equations governing riser in-plane/out-of-plane (cross-flow/in-line) motion are based on a pinned beam-cable model accounting for overall effects of bending, extensibility, sag, inclination and structural nonlinearities. The empirically hydrodynamic model is based on nonlinear wake oscillators describing the fluctuating lift/drag forces. Depending on the potentially vortex-induced modes and system parameters, a reduced-order fluid-structure interaction model is derived which entails a significantly reduced computational time effort. Parametric results reveal maximum response amplitudes of risers, along with the occurrence of uni-modal lock-in phenomenon.

Original languageEnglish
Pages129-136
Number of pages8
Publication statusPublished - 1 Dec 2008
Event8th 2008 ISOPE Pacific/Asia Offshore Mechanics Symposium - Bangkok, Thailand
Duration: 10 Nov 200814 Nov 2008

Conference

Conference8th 2008 ISOPE Pacific/Asia Offshore Mechanics Symposium
CountryThailand
CityBangkok
Period10/11/0814/11/08

Keywords

  • Catenary riser
  • Empirical coefficient
  • Uniform current
  • Vortex-induced vibration
  • Wake oscillator, fluid-structure interaction, reduced-order model

ASJC Scopus subject areas

  • Ocean Engineering

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    Srinil, N., Wiercigroch, M., O'Brien, P., & Lane, M. (2008). New model for vortex-induced vibration of catenary riser. 129-136. Paper presented at 8th 2008 ISOPE Pacific/Asia Offshore Mechanics Symposium, Bangkok, Thailand.