Vortex Self-Induced Vibrations (VSIV) of a reduced scale model of a catenary riser are experimentally investigated. The riser model dynamics was assessed with a submerged optical motion capture system and significant VSIV were revealed as result of oscillatory vertical motion imposed to the top. Such a behavior recovers similar ones reported in the technical literature by other authors and resembles previous fundamental studies, by Sumer and Fredsoe, with rigid cylinders forced to oscillate in a plane and elastically mounted in the transversal direction. The present experiments are preliminary and pertain to a much more comprehensive experimental set, within a research project aimed at studying the nonlinear dynamic behavior of risers, through experimentally validated analytical and numerical, nonlinear reduced-order models.
A Model Scale Experimental Investigation on Vortex-Self Induced Vibrations (VSIV) of Catenary Risers
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Rateiro Pereira, F, Gonçalves, RT, Pesce, CP, Fujarra, ALC, Franzini, GR, & Mendes, P. "A Model Scale Experimental Investigation on Vortex-Self Induced Vibrations (VSIV) of Catenary Risers." Proceedings of the ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. Volume 7: CFD and VIV. Nantes, France. June 9–14, 2013. V007T08A029. ASME. https://doi.org/10.1115/OMAE2013-10447
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