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 conferenceUnpublished paperpeer-review

3 Citations (Scopus)


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


Conference8th 2008 ISOPE Pacific/Asia Offshore Mechanics Symposium


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


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