Picture of boy being examining by doctor at a tuberculosis sanatorium

Understanding our future through Open Access research about our past...

Strathprints makes available scholarly Open Access content by researchers in the Centre for the Social History of Health & Healthcare (CSHHH), based within the School of Humanities, and considered Scotland's leading centre for the history of health and medicine.

Research at CSHHH explores the modern world since 1800 in locations as diverse as the UK, Asia, Africa, North America, and Europe. Areas of specialism include contraception and sexuality; family health and medical services; occupational health and medicine; disability; the history of psychiatry; conflict and warfare; and, drugs, pharmaceuticals and intoxicants.

Explore the Open Access research of the Centre for the Social History of Health and Healthcare. Or explore all of Strathclyde's Open Access research...

Image: Heart of England NHS Foundation Trust. Wellcome Collection - CC-BY.

Numerical and experimental comparisons of vortex-induced vibrations of marine risers in uniform/sheared currents

Srinil, Narakorn and O'Brien, Patrick and Wiercigrocha, Marian (2010) Numerical and experimental comparisons of vortex-induced vibrations of marine risers in uniform/sheared currents. In: The 29th International Conference on Ocean, Offshore and Arctic Engineering, 2010-06-06 - 2010-06-11.

This is the latest version of this item.

[img]
Preview
Text (strathprints018595)
strathprints018595.pdf
Accepted Author Manuscript

Download (1MB) | Preview

Abstract

This paper presents a general theoretical reduced-order model capable of evaluating the multi-mode nonlinear dynamics of marine risers subject to uniform and sheared currents. The main objectives are to predict the vortex-induced vibration responses and parametrically compare between numerical and experimental results. The emphasis is placed on the analysis of cross-flow vibrations due to unsteady lift forces. The nonlinear equations governing riser axial/transversal motions are derived based on a top-tensioned beam model with typical pinned-pinned boundary conditions. The riser geometric nonlinearities owing to possible large dynamic displacements and multi-mode interactions are accounted for. To approximate the space-time varying lift force, the empirical hydrodynamic model, based on a nonlinear van der Pol wake oscillator with a distributed diffusive term, is used. A low-dimensional dynamic model and computationally-robust time-domain tool are then developed to evaluate the multi-mode fluid-riser interactions. These are very useful in dealing with large parametric studies involving varying system parameters.

Available Versions of this Item

  • Numerical and experimental comparisons of vortex-induced vibrations of marine risers in uniform/sheared currents. (deposited 07 Apr 2010 09:40) [Currently Displayed]