Showing papers on "Vortex-induced vibration published in 1997"
TL;DR: In this paper, an experimental study of vortex-induced vibration of a circular cylinder was conducted in a unique experimental facility especially designed for low mass and low damping, and two separate regions of the high amplitude response curve were identified, which were labeled as upper and lower branches of response.
188 citations
TL;DR: In this paper, the problem of vortex-induced vibrations in flexibly mounted cylinders and marine cables is addressed using a new laboratory apparatus, which combines force-feedback with on-line numerical simulation of a modeled structure.
106 citations
TL;DR: In this article, a finite element approach for nonlinear vibration analysis of Timoshenko pipes conveying fluid is presented, using the concept of fictitious loads to account for the kinematic corrections, without the need to establish the nonlinear equations of motion.
47 citations
TL;DR: The results from four predefined cases were presented by seven participants in a Workshop on Vortex Induced Vibrations of Marine Risers and Cables in Trondheim, May 1994.
34 citations
TL;DR: In this article, a wind-tunnel experiment using a cylinder tower rocking model is conducted to study the characteristics of the across-wind response and vortex-induced vibration which occurs at a wind speed higher than the occurrence wind speed of the ordinary vortex induced vibration.
33 citations
TL;DR: In this article, the fluid elastic vibration problems of two cylinders and a cylinder row are simulated using the CFD technique and the characteristic phenomena of vortex shedding, coupled with two-cylinder motion and fluid elastic instability of cylinder row, are successfully simulated.
Abstract: Fluid elastic vibration of tube bundles is one of the most important factors that must be considered in the design of heat exchangers. Since this phenomenon is caused by the interaction between flow and structure, and is hence very complex and sensitive in nature, the design criteria established through many experiments, based on envelopes of the scattered data, have been the only reliable tools for the designers. The authors have developed an accurate CFD technique to solve this moving boundary problem. The fluid elastic vibration problems of two cylinders and a cylinder row are simulated using the CFD technique. The characteristic phenomena of vortex shedding, coupled with two-cylinder motion and fluid elastic instability of a cylinder row are successfully simulated.
23 citations
TL;DR: In this paper, numerical simulations of the vortex-induced vibration of a circular cylinder were carried out when a periodic velocity excitation was applied to the flow at two locations on the cylinder surface.
20 citations
01 Jan 1997
11 citations
01 Jan 1997
6 citations
01 Aug 1997
TL;DR: A model of a stack/wire system, wind-induced vibration of the stack based on an unsteady-flow theory, and nonlinear dynamics of heavy elastic suspended cables was developed in this article.
Abstract: A model of a stack/wire system, wind-induced vibration of the stack based on an unsteady-flow theory, and nonlinear dynamics of the stack`s heavy elastic suspended cables was developed in this study. The response characteristics of the stack and cables are presented for different conditions. The dominant excitation mechanisms are lock-in resonance of the stack by vortex shedding and parametric resonance of suspended cables by stack motion at their support ends.
TL;DR: In this article, the effects of an interfering stationary cylinder, located downstream, on the flow induced vibration of an upstream elastically mounted circular cylinder were investigated. But the interference effects were studied extensively by changing the diameter ratios (d D ) of the two cylinders and the gap spacing ( g D ) between them.
25 Mar 1997
TL;DR: In this article, the effect of spacing between two adjoining circular cylinders on flow around two rows of two-dimensional circular cylinder bundles supported by wires was investigated in an N.P.L. blowdown-type wind tunnel with a working section of 500mm×500mm×2000mm, and a Reynolds number of 9.4×103.
Abstract: In this paper we describe the effect of spacing between two adjoining circular cylinders on flow around two rows of two-dimensional circular cylinder bundles supported by wires. The experiment was carried out in an N.P.L. blow-down-type wind tunnel with a working section of 500mm×500mm×2000mm, and a Reynolds number of 9.4×103. The frequency of vortex shedding from the circular cylinder, the displacement of the vibrating circular cylinder, and the mean time and fluctuating surface pressure distributions on the circular cylinder were measured. The results were compared with those for the case of a fixed support. Consequently it was found that (i) vortex shedding from circular cylinders occurs in the range of spacing ratio S/D≥2, (ii) fluid elastic vibration occurs in the range of S/D<2 for the first row and S/D<2.3 for the second row, and (iii) the variation of fluctuating drag coefficient and fluctuating lift coefficient corresponds to that of displacement of a vibrating cylinder.
TL;DR: In this article, the motion of a system of bodies along a plane in a viscous fluid in the presence of flow shear is considered and it is demonstrated that a main torque, linearly proportional to the velocities of the bodies, is exerted by the fluid on the system of the body and the plane.
Abstract: The motion of a system of bodies along a plane in a viscous fluid in the presence of flow shear is considered. It is demonstrated that a main torque, linearly proportional to the velocities of the bodies, is exerted by the fluid on the system of the bodies and the plane.