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Title:Effect of an Internal Rotational Nonlinear Attachment on the Vortex-Induced Vibration of a Rigid Circular Cylinder in a Subcritical Incompressible Flow
Author(s):Tumkur, Ravi K.R.; Pearlstein, Arne J.; Masud, A.; Gendelman, Oleg V.; Bergman, Lawrence A., Vakakis, Alexander F.
Subject(s):Fluid Dynamics, Incompressible Flows, Vortex Induced Vibration, Energy Harvesting
Abstract:“Vortex-induced vibration” (VIV) of a sprung cylinder is a familiar fluid-structure interaction phenomenon occurring over a wide range of flow Reynolds number (Re). From a dynamical systems perspective, at critical Reynolds number (Rec), the fixed point of the wake oscillator loses its stability resulting in limit-cycle oscillation, which is a well known supercritical Hopf bifurcation. In this paper, we discuss the relation between the critical Reynolds number (Rec) for the Hopf bifurcation and the stiffness of the cylinder for a sprung rigid circular cylinder. In addition, we introduce a rotational “nonlinear energy sink” (NES) into the system and study its effect on Rec in subcritical flow regime.
Issue Date:2014-07-06
Publisher:Institute of Mechanics and Mechatronics, Technical University of Vienna, Austria, A-1040 Vienna, Austria.
Citation Info:ENOC2014, 8th European Nonlinear Dynamics Conference, July 6-11, 2014, Vienna, Austria
Genre:Conference Paper / Presentation
Date Available in IDEALS:2018-03-05

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