Download or read book Vortex excited Vibrations of Pivoted Cylinders in Uniform and Shear Flows written by Sathish Balasubramanian and published by . This book was released on 1998 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flow Induced Vibration written by S. Ziada and published by CRC Press. This book was released on 2000-01-01 with total page 863 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow-induced vibrations and noise continue to cause problems in a wide range of engineering applications ranging from civil engineering and marine structures to power generation and chemical processing. These proceedings bring together more than a hundred papers dealing with a variety of topics relating to flow-induced vibration and noise. The cont

Download or read book 4th International Symposium on Fluid Structure Interactions Aeroelasticity Flow Induced Vibration and Noise written by M. P. Paidoussis and published by . This book was released on 1997 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coupled Cross flow and In line Vortex induced Vibration of Elastic Cable Systems written by WanJun Kim and published by . This book was released on 2001 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book OTEC Cold Water Pipe Design for Problems Caused by Vortex excited Oscillations written by Owen M. Griffin and published by . This book was released on 1980 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vortex-excited oscillations of marine structures result in reduced fatigue life, large hydrodynamic forces and induced stresses, and sometimes lead to structural damage and to destructive failures. The cold water pipe of an OTEC plant is nominally a bluff, flexible cylinder with a large aspect ratio (L/D = length/diameter), and is likely to be susceptible to resonant vortex-excited oscillations. The objective of this report is to survey recent results pertaining to the vortex-excited oscillations of structures in general and to consider the application of these findings to the design of the OTEC cold water pipe. Practical design calculations are given as examples throughout the various sections of the report. This report is limited in scope to the problems of vortex shedding from bluff, flexible structures in steady currents and the resulting vortex-excited oscillations. The effects of flow non-uniformities, surface roughness of the cylinder, and inclination to the incident flow are considered in addition to the case of a smooth cylinder in a uniform stream. Emphasis is placed upon design procedures, hydrodynamic coefficients applicable in practice, and the specification of structural response parameters relevant to the OTEC cold water pipe. There are important problems associated with the shedding of vortices from cylinders in waves and from the combined action of waves and currents, but these complex fluid/structure interactions are not considered in this report.

Download or read book Vortex Shedding from Cylinders with Step changes in Diameter in Uniform and Shear Flows written by Warren R. Dunn and published by . This book was released on 2004 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vortex induced Vibration of Flexible Cylinders in Time varying Flows written by Themistocles L. Resvanis and published by . This book was released on 2014 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates two aspects of Vortex-Induced Vibrations (VIV) on long flexible cylinders. The work is split into a minor and major part. The minor part addresses the effect of Reynolds number on flexible cylinder VIV. The major contribution addresses the prediction of VIV under unsteady current excitation or time-varying flows. The study on the effect of Reynolds number makes extensive use of a recent set of experiments performed by MARINTEK on behalf of SHELL Exploration and Production Co. Three 38[gamma] long cylinders of different diameters were towed through the ocean basin over a wide range of Reynolds numbers in both uniform and sheared flows. The experimental data showed that the response amplitudes and dimensionless response frequency are strongly influenced by the Reynolds number. Both of these Reynolds effects should be of interest to riser designers that traditionally rely on experimental data obtained at much lower Reynolds numbers. In this thesis, I propose a dimensionless parameter, [gamma], that governs whether lock-in under unsteady flow conditions is possible and show that it is useful for determining a priori whether the response under unsteady conditions will be similar to the response under steady flows. The unsteady flow parameter, [gamma], describes the change in flow speed per cycle of cylinder vibration and is defined as: ... The experimental data necessary to support this work is taken from a set of experiments performed at the State Key Laboratory of Ocean Engineering at Shanghai Jiao Tong University (SJTU), where a 4[gamma] long flexible cylinder was towed through an ocean basin under carefully selected amounts of acceleration/deceleration. Analysis of the experimental data showed that the response can typically be divided into three regimes based on the [gamma] value: For very quickly accelerating flows ([gamma] > 0.1) the cylinder cannot react quickly enough and at most a couple of cycles of small amplitude vibration will be observed. For moderately accelerating flows (0.02

Download or read book Experiments on Vortex Excited Oscillations of Axially Varying Cylindrical Structures in Non Uniform Approach Flow written by and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The long term goals of this experimental investigation are to identify and understand the important fluid-structure interaction mechanisms that occur during vortex-excited vibrations of axially-varying cylindrical structures in non-uniform flow fields.

Download or read book Proceedings of the 5th International Symposium on Fluid Structure Interactions Aeroelasticity Flow Induced Vibration and Noise written by M. P. Paidoussis and published by . This book was released on 2002 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the 5th International Symposium on Fluid Structure Interaction Aeroelasticity Flow Induced Vibration and Noise written by M. P. Paidoussis and published by . This book was released on 2002 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vortex induced Vibrations of a Heavy Tethered Sphere in Uniform Flow written by Alexander Krakovich and published by . This book was released on 2012 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vortex induced Vibrations of a Pivoted Circular Cylinder and Their Control Using a Tuned mass Damper written by Sina Kheirkhah and published by . This book was released on 2011 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vortex-induced vibrations of a pivoted circular cylinder and control of these vibrations were investigated experimentally.

Download or read book Proceedings of the Workshop on Marine Riser Mechanics written by Michael M. Bernitsas and published by . This book was released on 1992 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nonlinear Dynamics and Stochastic Mechanics written by Wei-Chau Xie and published by . This book was released on 2000 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thirteen papers from a November 2000 meeting examine central topics in theory and applications of nonlinear dynamics, stochastic mechanics and dynamics, and control of nonlinear mechanical and structural systems. Papers address topics related to fundamental, applied, analytical, computational, and e

Download or read book Vortex Excited Unsteady Forces on Resonantly Vibrating Bluff Structures written by Owen M. Griffin and published by . This book was released on 1978 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report considers recent experimental findings pertaining to the vortex-excited oscillations of bluff cylinders, and compares various approaches to measuring the resultant fluid forces. As one example, measurements of the structural damping and crossflow response amplitudes were made for several systems over a representative range of wind tunnel flow speeds. The fluid dynamic damping or reaction in-phase with the cylinder's velocity also was measured for different incident flow speeds over a range which included the locking-on of the vortex shedding to the resonant cylinder vibrations. A mathematical model is proposed in connection with these measurements, and the components of the excitation or lift force on a vibrating structure can be obtained from the model once the structural damping and fluid reaction forces are known. In a second approach, the fluid forces were measured on a cylinder which was forced to oscillate in water at different frequencies and crossflow amplitudes over a range of incident flow speeds. Both the steady and unsteady forces are altered significantly in the locking-on regime, with large amplifications in both the lift and drag. These vortex-excited forces are then incorporated into the mathematical model for self-excited, resonant vibrations and the complementary nature of the two measurement schemes is discussed. The results obtained from the present study are suitable in general for application not only to the vortex-excited vibrations of rigid cylinders, but also to other flexible bluff structures and cables in air and in water. (Author).

Download or read book Vortex Induced Vibrations of Slender Cylinders in Sheared Flow written by J. A. Humphries and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Two dimensional Numerical Study with LES Modeling of Vortex Induced Vibration of a Circular Cylinder Subjected to a Uniform Flow at a Moderate Reynolds Number written by Helmi Nazmi Al-Jamal and published by . This book was released on 2002 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: