Optimal control of flowinduced vibration of pipeline. Moretti, flow induced vibrations and flow instabilities, chapter 42 in modern vibrations primer, crc press, boca raton. Get your kindle here, or download a free kindle reading app. It covers the analysis of the vibrations of structures exposed to fluid flows. An engineering guide and millions of other books are. However, a simplified analysis can be performed using the concept of the strouhal. Department of mechanical engineering, mcmaster university, hamilton, ontario, canada. Wet steam nonequilibrium condensation flowinduced vibrations of a nuclear turbine blade j. This title also focuses on acoustic and mechanical vibration of heat exchangers, power lines, and process ducting. The study includes, but not limited to, turbulenceinduced vibration, vorticity sheddinginduced vibration, and the fluid elasticstability. The source of excitation is turbulent buffeting at low flow velocity, while a movement induced excitation component is present at large flow velocities. Flow rate measurements using flowinduced pipe vibration.
Acoustic and flow induced vibration acoustic and vibration technical manager associate member of the institute of acoustics key presenter at the iaia conference 20, south africa course introduction failures of piping systems in the oil, gas and petrochemical industries can lead to damage of assets, personal injury and loss of life. The stability analysis of the vibration is also accomplished. Flowinduced vibration, or vortex shedding, is due to high flow velocities such as in a piping dead leg of a centrifugal compressor system. The flowinduced vibration of a venturitype valve head is investigated experimentally and numerically. Nonuniform flow distributions in the axial and transverse directions are examined briefly, followed by upstream turbulence. Finite element analysis methodology is used to determine the critical uid velocity that induces the threshold of pipe instability. Flowinduced vibration fiv analysis vortex shedding. A detailed explanation of this phenomenon is available in blevins 1973. Flowinduced vibration journal of applied mechanics.
Flowinduced vibration with applications to failure. The definition of the critical flow velocity is addressed, and detuning of the vibrations of the lox posts is discussed. In milder cases, the problem may be annoying vibration and noise. Among the topics of flowinduced vibration, cylindrical structures play very important and vital roles.
Flowinduced vibration has been added to your cart add to cart. In many plants, vibration and noise problems occur due to fluid flow, which can greatly disrupt smooth plant operations. A similar tone is produced when air is blown across the mouth of a pop bottle. Section 5 explores results of flowinduced vibration analysis, final investigations and results are presented in section 6 and concluding remark is given in section 7.
Flowinduced vibration, elastic foundation, flexural vibration 1 introduction concern for the flowinduced vibration of the tube has become a serious consideration in. Explain the vortex induced vibration, galloping, flutter, sonic fatigue, and fluid elastic instability. We need to utilize the variation of the difference between the natural frequencies of the pipe conveying fluid with and without a crack. This book explains how and why such vibrations happen and provides hints and. Flowinduced vibration is a term to denote those phenomena associated with the response of structures placed in or conveying fluid flow. We investigate selfexcited lateral vibration of a pipe due to an internal flow.
More specifically, the terra covers those cases in which an interaction develops between fluiddynamic forces and the inertia, damping or elastic forces in the. This signal noise is a result of turbulenceinduced pressure fluctuations in the fluid flow which. Vortexinduced vibration viv is an important source of fatigue damage of offshore oil exploration drilling, export, production risers, including steel catenary risers scrs and tension leg platform tlp tendons or teathers. Flowinduced vibrations in power and process plant components.
Gas turbines power november, 2018 rotordynamic characterization of a staggered labyrinth seal. Flowinduced vibration analysis of supported pipes with a. In many cases, lighthills theory can, nevertheless, be applied successfully, and it is the most commonlyused model for the study of flowinduced sound and vibration. How to start this project i really need help thanks march 31, 2012, 18. Flowinduced vibration of circular cylindrical structures. Blevins book is an absolute must have in cfd and fea for thermal fluids. Experimental test data and comparison with predictions. Flowinduced vibration of pipeline on elastic support. Accessibility privacy statement terms of use get adobe acrobat reader. Figure 5 shows the vibration modes of the bellows structure for three flexible convolutions in fluid. May i know how to conduct flow induced vibration in ansys. The physical mechanisms corresponding to the 3 source types, and examples of when. Flowinduced turbulence fit analysis vortex shedding.
Pulsation induced by vortex shedding can be extremely. Fit analysis applies to rotating pumps or compressors to determine if lowfrequency vibration will cause piping vibration. Blevins, 9780894648236, available at book depository with free delivery worldwide. As many previous studies were considered laminar flow re lecture. From the standpoint of the designer, a desirable goal was to have available an analytical procedure allowing the prediction of critical fluid flow ranges. Design optimization of shell and tube heat exchanger by. Experimentallytuned finite element model of flowinduced vibrations in a square tube bundle subjected to crossflow imece2012 virtual sensing in local active suppression on pressure fluctuations for controlling flowinduced vibration in hard disk drives.
Mechanics of flowinduced vibration failures of heat exchangers caused by flowinduced vibration are mainly in terms of the detriments of heat exchanger tubes. The approach involved complex mechanics and geometric analysis to arrive at new and simple equations which compares favorably to experimental results. Sources and remedies of highfrequency piping vibration and noise by stephen m. Flow induced vibration of bluff structures caltechthesis. Flow induced vibrations in pipes, a finite element approach ivan grant abstract flow induced vibrations of pipes with internal uid ow is studied in this work. Roshkoexploration of flow induced vibration at low mass and damping. Equations were developed to express the influence of internal fluid flow on the natural frequency and displacement amplitude of vibrating pipes. This book explains how and why such vibrations happen and provides hints and tips on how to avoid them in future plant design.
The effect of a crack to the flowinduced vibration characteristics of supported pipes is investigated based on vibration method. Each participant will receive a copy of the book, flow induced vibration, 2 nd edition, by dr. Although it has been considered that only the forced vibration occurs in a venturi valve, the results in the present study confirms that selfexcited vibration can occur. Flow past a valve entrance cavity excites a standing wave, resulting in noise and vibration. Flowinduced vibration of circular cylindrical structures iaea. This study evaluates vortex shedding and potential vibration across dead leg branches. Flowinduced vibration accessscience from mcgrawhill education. Whenever a structure is exposed to a flowing fluid.
It was not until the 60s, when widespread failure of tubes began to occur 16. These slender structures experience both current flow and topend vessel motions, which both give rise to the flow. A mathematical model is presented for flowinduced vibration of the space shuttle main engine ssme liquid oxygen lox posts. Focuses on applications for offshore platforms and piping. The study can also include fiv excitation of smallbore piping and components in the flow, such as thermowells. Its jampacked with fluid studies, theories, and analysis principals, which in turn has helped me build linear. Everyday low prices and free delivery on eligible orders.
Flow induced vibration journal of mechanical design. The flow induced vibration of pipes due to internal flowing fluid is studied and investigated. Blevins, 9780442206512, available at book depository with free delivery worldwide. Design and analysis of a dynamic structure for the study of multiphase flow induced vibration hydrodynamic mass phenomena for countergravity twophase cross. Windinduced vibration and the effects on steel and aluminum light poles provides detailed information about what aeolian vibration is, how it can be identified, how windinduced vibration can affect the performance and strength of light poles, and ways the effects of vibration can be mitigated both pro. Full text of flow induced vibration internet archive. For instance, the slender bodies of aircraft fuselages, missiles, and rockets, and the main bodies of industrial smokestacks, power transmission cables, telephone wires, oil pipelines, reactor fuel rods, heatexchanger tubes, and offshore structures, as well as. These flowrelated phenomena are called flowinduced vibration. The worldleading author team doesnt assume prior knowledge of mathematical methods and provides the reader with information on the basics of modeling. The stability boundary of fluid velocity is expressed in terms of the system parameters, such as, pipe material density and rigidity, and fluid density, etc.
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