Flow Induced Riser Vibration And Its Control
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Flow Induced Riser Vibration And Its Control
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Author : Ji Lu
language : en
Publisher:
Release Date : 2013
Flow Induced Riser Vibration And Its Control written by Ji Lu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
In this thesis, the vibration of a model riser induced by a rotating flow field is investigated. The first task was to develop a rotating flow field in a water tank and to qualify the flow field has been made experimentally and numerically. Qualification of the unsteady rotating flow field by analytical solution of Navier-Stokes equations for this flow field at the decay stage, and computational fluid dynamic (CFD) simulation for high Reynolds number at the spin-up stage and decay stage. Experimental verification was provided for the analytical solution of flow at the decay stage. Based on the experimental and numerical investigation of different kinds of model risers, including straight, curved and Steel Catenary riser (SCR) models, the effects of the boundary condition and curvature of the risers on the flow-structure interaction of the risers, have been studied. The results for SCR model testing exhibited a strong beating motion in response over the high curvature, which corresponds to a wider upper branch in the lock-in (synchronization of structural vibration frequency and vortex shedding frequency). The increasing modal damping at higher modes could excite large modal coupling effect on in-plane and out-of-plane response under excitation particularly at outof- plane direction. Both modal coupling and beating motion are significantly enhanced by reducing curvature on either forced vibration case or the Vortex-induced Vibration (VIV). Different boundary conditions by experimental and numerical investigation were studies for straight and curved model risers, indicating that the 1st mode of simple supported straight rod acts in the water qualitatively to the 2nd mode of the cantilever rod, and similarly, the 2nd mode of the former is similar to the 3rd mode of the later. The excitation region to the structure response was identified, which was less significant under the constraint boundary at the bottom than in cantilever case. Based on the experimental investigation on shifting of natural frequencies, the numerical model for response in cross-flow direction predicted that beating motion appeared in both the forced vibration case, and the free vibration VIV case. The model indicated that the beating motion was significantly enhanced by reducing curvature on either forced vibration case or the VIV situation, which echoed the experimental investigations in Chapter 3. This thesis work investigated passive control of riser vibration using a splitter plate and the boundary control of riser vibration. The effect of splitter plate with various lengths on the response of an oscillating cylinder was investigated experimentally at cross-flow direction with a set of reduced velocities. The CFD model was also simulated in ANSYS CFX to investigate the relationship between the detached vortices and the splitter plate length. Based on the energy approach, the equations of motion of a SCR model subject to the time-varying hydrodynamic disturbance have been derived. The Lyapunov direct method was applied to design the boundary controller at the top end of the model based on the nonlinear partial differential equations. The proof of the closed-looped stability under external disturbance, and proof of existence and uniqueness of the solutions of the closedloop system were given. The numerical simulation results verified the proposed boundary control.
Mechanics Of Flow Induced Vibration
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Author : Rajeev Jaiman
language : en
Publisher: Springer Nature
Release Date : 2023-06-10
Mechanics Of Flow Induced Vibration written by Rajeev Jaiman and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-06-10 with Technology & Engineering categories.
This book discusses various passive and active techniques for controlling unsteady flow dynamics and associated coupled mechanics of fluid-structure interaction. Coupled multiphysics and multidomain simulations are emerging and challenging research areas, which have received significant attention during the past decade. One of the most common multiphysics and multidomain problems is fluid-structure interaction (FSI), i.e., the study of coupled physical systems involving fluid and a structure that have a mechanical influence on each other. Regardless of the application area, the investigation toward modeling of fluid-structure interaction and the underlying mechanisms in dealing with coupled fluid-structure instability with real-world applications remains a challenge to scientists and engineers. This book is designed for students and researchers who seek knowledge of computational modeling and control strategies for fluid-structure interaction. Specifically, this book provides a comprehensive review of the underlying unsteady physics and coupled mechanical aspects of the fluid-structure interaction of freely vibrating bluff bodies, the self-induced flapping of thin flexible structures, and aeroelasticity of shell structures. Understanding flow-induced loads and vibrations can lead to safer and cost-effective structures, especially for light and high-aspect ratio structures with increased flexibility and harsh environmental conditions. Using the body-fitted and moving mesh formulations, the physical insights associated with structure-to-fluid mass ratios, Reynolds number, nonlinear structural deformation, proximity interference, near-wall contacts, free-surface, and other interacting physical fields are covered in this book. In conjunction with the control techniques, data-driven model reduction approaches based on subspace projection and deep neural calculus are covered for low-dimensional modeling of unsteady fluid-structure interaction.
Flow Induced Vibration And Noise Control With Flow
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Author : Yang Liu
language : en
Publisher:
Release Date : 2011
Flow Induced Vibration And Noise Control With Flow written by Yang Liu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Fluid dynamics categories.
Flow Induced Vibrations
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Author : Eduard Naudascher
language : en
Publisher: Courier Corporation
Release Date : 2012-03-27
Flow Induced Vibrations written by Eduard Naudascher and has been published by Courier Corporation this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-03-27 with Science categories.
Despite their variety, the vibration phenomena from many different engineering fields can be classified into a relatively few basic excitation mechanisms. The classification enables engineers to identify all possible sources of excitation in a given system and to assess potential dangers. This graduate-level text presents a synthesis of research results and practical experience from disparate fields in the form of engineering guidelines. It is particularly geared toward assessing the possible sources of excitation in a flow system, in identifying the actual danger spots, and in finding appropriate remedial measures or cures. Flow-induced vibrations are presented in terms of their basic elements: body oscillators, fluid oscillators, and sources of excitation. By stressing these basic elements, the authors provide a basis for the transfer of knowledge from one system to another, as well as from one engineering field to another. In this manner, well-known theories on cylinders in cross-flow or well-executed solutions from the field of wind engineering--to name just two examples--may be useful in other systems or fields on which information is scarce. The unified approach is broad enough to permit treatment of the major excitation mechanism, yet simple enough to be of practical use.
Flow Induced Vibration Handbook For Nuclear And Process Equipment
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Author : Michel J. Pettigrew
language : en
Publisher: John Wiley & Sons
Release Date : 2021-12-09
Flow Induced Vibration Handbook For Nuclear And Process Equipment written by Michel J. Pettigrew and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-12-09 with Technology & Engineering categories.
Explains the mechanisms governing flow-induced vibrations and helps engineers prevent fatigue and fretting-wear damage at the design stage Fatigue or fretting-wear damage in process and plant equipment caused by flow-induced vibration can lead to operational disruptions, lost production, and expensive repairs. Mechanical engineers can help prevent or mitigate these problems during the design phase of high capital cost plants such as nuclear power stations and petroleum refineries by performing thorough flow-induced vibration analysis. Accordingly, it is critical for mechanical engineers to have a firm understanding of the dynamic parameters and the vibration excitation mechanisms that govern flow-induced vibration. Flow-Induced Vibration Handbook for Nuclear and Process Equipment provides the knowledge required to prevent failures due to flow-induced vibration at the design stage. The product of more than 40 years of research and development at the Canadian Nuclear Laboratories, this authoritative reference covers all relevant aspects of flow-induced vibration technology, including vibration failures, flow velocity analysis, vibration excitation mechanisms, fluidelastic instability, periodic wake shedding, acoustic resonance, random turbulence, damping mechanisms, and fretting-wear predictions. Each in-depth chapter contains the latest available lab data, a parametric analysis, design guidelines, sample calculations, and a brief review of modelling and theoretical considerations. Written by a group of leading experts in the field, this comprehensive single-volume resource: Helps readers understand and apply techniques for preventing fatigue and fretting-wear damage due to flow-induced vibration at the design stage Covers components including nuclear reactor internals, nuclear fuels, piping systems, and various types of heat exchangers Features examples of vibration-related failures caused by fatigue or fretting-wear in nuclear and process equipment Includes a detailed overview of state-of-the-art flow-induced vibration technology with an emphasis on two-phase flow-induced vibration Covering all relevant aspects of flow-induced vibration technology, Flow-Induced Vibration Handbook for Nuclear and Process Equipment is required reading for professional mechanical engineers and researchers working in the nuclear, petrochemical, aerospace, and process industries, as well as graduate students in mechanical engineering courses on flow-induced vibration.
Flow Induced Vibration
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Author : Robert D. Blevins
language : en
Publisher: Van Nostrand Reinhold Company
Release Date : 1990
Flow Induced Vibration written by Robert D. Blevins and has been published by Van Nostrand Reinhold Company this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Science categories.
First edition, 1977. Provides engineers with theoretical and practical methods for predicting and minimizing structural damage from vibration induced by wind, water, or internal flows. Applications include buildings, bridges, offshore platforms, heat exchangers, power lines, ducts, and aerospace str.
Flow Induced Vibrations
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Author : Tomomichi Nakamura
language : en
Publisher: Butterworth-Heinemann
Release Date : 2013-12-06
Flow Induced Vibrations written by Tomomichi Nakamura and has been published by Butterworth-Heinemann this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-12-06 with Technology & Engineering categories.
In many plants, vibration and noise problems occur due to fluid flow, which can greatly disrupt smooth plant operations. These flow-related phenomena are called flow-induced vibration. This book explains how and why such vibrations happen and provides hints and tips on how to avoid them in future plant design. The world-leading author team doesn’t assume prior knowledge of mathematical methods and provides the reader with information on the basics of modeling. The book includes several practical examples and thorough explanations of the structure, the evaluation method and the mechanisms to aid understanding of flow-induced vibrations. Helps ensure smooth plant operations Explains the structure, evaluation method and mechanisms Shows how to avoid vibrations in future plant design
Flow Induced Vibrations
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Author : Tomomichi Nakamura
language : en
Publisher: Elsevier
Release Date : 2008-06-17
Flow Induced Vibrations written by Tomomichi Nakamura and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-06-17 with Science categories.
In many plants, vibration and noise problems occur due to fluid flow, which can greatly disrupt smooth plant operations. These flow-related phenomena are called Flow-Induced Vibration.This book explains how and why such vibrations happen and provides hints and tips on how to avoid them in future plant design. The world-leading author team doesn’t assume prior knowledge of mathematical methods and provide the reader with information on the basics of modeling. The book includes several practical examples and thorough explanations of the structure, the evaluation method and the mechanisms to aid understanding of flow induced vibration. Helps ensure smooth plant operations Explains the structure, evaluation method and mechanisms Shows how to avoid vibrations in future plant design
Flow Induced Vibration
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Author : S. Ziada
language : en
Publisher: CRC Press
Release Date : 2000-01-01
Flow Induced Vibration written by S. Ziada and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-01-01 with Science categories.
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
Flow Induced Vibration Of Power And Process Plant Components
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Author : M. K. Au-Yang
language : en
Publisher: Wiley-Blackwell
Release Date : 2001
Flow Induced Vibration Of Power And Process Plant Components written by M. K. Au-Yang and has been published by Wiley-Blackwell this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Fluid dynamics categories.
Flow-Induced Vibration of Power and Process Plant Componentsis an indispensable, single source of information on the mostcommon flow-induced vibration problems in power and process plantcomponents. Based on the author?s own experience that mosterrors in engineering analysis come from confusions in the units,the book begins with a short chapter on units and dimensions. It also provides step-by-step examples in dual US and SIunits, leading to the final objective of design analysis, problemsolving, diagnosis, and trouble shooting covering: Fundamentals ofvibration; Acoustics and structural dynamics; Vibration ofstructures in quiescent fluids; Vortex-induced vibration;Turbulence-induced vibration; Impact, fatigue, and wear caused byflowinduced vibration; Acoustically induced vibration; Signalanalysis and diagnostic techniques. CONTENTS INCLUDE: The kinematics of vibration and acoustics Fundamentals of structural dynamics Vortex-induced vibration Fluid-elastic instability of tube bundles Axial and leakage-flow-induced vibrations Impact, fatigue and wear Signal analysis and diagnostic techniques