Nonlinear multi-mode interactions in subsea risers undergoing vortex-induced vibrations

Narakorn Srinil*, Marian Wiercigroch, Patrick O'Brien

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

This paper investigates nonlinear multi-mode interactions in subsea risers undergoing vortex-induced vibrations based on a computationally efficient reduced-order fluid-structure interaction model. Cross-flow responses as a result of a steady uniform current are considered. The geometrically nonlinear equations of riser motion are coupled with nonlinear wake oscillators which have been modified to capture the effect of initial curvatures of curved cylinder and to approximate the space-time varying hydrodynamic lift forces. The main objectives are to provide new insights into the vortex-induced vibration characteristics of risers under external and internal resonances and to distinguish nonlinear dynamic behaviors between curved catenary and straight top-tensioned risers. The analyses of multi-mode contributions, lock-in regimes, response amplitudes, resonant nonlinear modes and curvatures are carried out and several interesting aspects are highlighted.

Original languageEnglish
Title of host publicationThe Proceedings of the 19th (2009) International OFFSHORE AND POLAR ENGINEERING CONFERENCE
Pages1329-1336
Number of pages8
Publication statusPublished - 1 Dec 2009
Event19th (2009) International OFFSHORE AND POLAR ENGINEERING CONFERENCE - Osaka, Japan
Duration: 21 Jun 200926 Jun 2009

Conference

Conference19th (2009) International OFFSHORE AND POLAR ENGINEERING CONFERENCE
CountryJapan
CityOsaka
Period21/06/0926/06/09

Keywords

  • Fluid-structure interaction
  • Multi-mode interaction
  • Reduced-order model
  • Resonant nonlinear mode
  • Subsea riser
  • Vortex-induced vibration
  • Wake oscillator

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Ocean Engineering

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  • Cite this

    Srinil, N., Wiercigroch, M., & O'Brien, P. (2009). Nonlinear multi-mode interactions in subsea risers undergoing vortex-induced vibrations. In The Proceedings of the 19th (2009) International OFFSHORE AND POLAR ENGINEERING CONFERENCE (pp. 1329-1336)