Fluid-Structure Interactions Cross-Flow-Induced Instabilities
Structures in contact with fluid flow, whether natural or man-made, are inevitably subject to flow-induced forces and flow-induced vibration: from plant leaves to traffic signs and to more substantial structures, such as bridge decks and heat exchanger tubes. Under certain conditions the vibration m...
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| Main Authors: | , , |
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| Format: | eBook |
| Language: | English |
| Published: |
New York
Cambridge University Press
13.12.2010
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| Edition: | 1 |
| Subjects: | |
| ISBN: | 0521119421, 9780521119429, 1107652952, 9781107652958 |
| Online Access: | Get full text |
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Table of Contents:
- Title Page Preface Table of Contents 1. Introduction 2. Prisms in Cross-Flow - Galloping 3. Vortex-Induced Vibrations 4. Wake-Induced Instabilities of Pairs 5. Fluidelastic Instabilities in Cylinder Arrays 6. Ovalling Instabilities of Shells in Cross-Flow 7. Rain-and-Wind-Induced Vibrations Epilogue Appendices References Index
- 6.3.1 Padoussis and Helleur's 1979 experiments -- 6.3.2 In search of a new cause -- 6.4 Further Evidence Contradicting Vortex-Shedding Hypothesis -- 6.4.1 Further experiments with cantilevered shells -- 6.4.2 Experiments with clamped-clamped shells -- 6.5 Counterattack by the Vortex-Shedding Proponents and Rebuttal -- 6.5.1 The ``peak of resonance'' argument -- 6.5.2 Have splitter plates been ineffectual? -- 6.5.3 Denouement -- 6.6 Simple Aeroelastic-Flutter Model -- 6.6.1 Equations of motion and boundary conditions -- 6.6.2 Solution of the equations -- 6.6.3 Theoretical results and comparison with experiment -- 6.7 A Three-Dimensional Flutter Model -- 6.7.1 The model and methods of solution -- 6.7.2 Theoretical results -- 6.7.3 Comparison with experiment -- 6.7.4 Improvements to the theory -- 6.8 An Energy-Transfer Analysis -- 6.9 Another Variant of the Aeroelastic-Flutter Model -- 6.9.1 The flutter model -- 6.9.2 Typical results -- 6.9.3 An empirical relationship for Uthr -- 6.10 Concluding Remarks -- 7 Rain-and-Wind-Induced Vibrations -- 7.1 Experimental Evidence -- 7.1.1 Field cases -- 7.1.2 Wind-tunnel experiments -- 7.2 Modelling Rainwater Rivulets -- 7.2.1 Development of rivulets -- 7.2.2 Tearing of rivulets -- 7.3 VIV, Galloping and Drag Crisis -- 7.4 Yamaguchi's Model: A Cylinder-Rivulet-Coupled Instability -- 7.5 Concluding Remarks -- Epilogue -- Appendix A The Multiple Scales Method -- Appendix B Measurement of Modal Damping for the Shells Used in Ovalling Experiments -- References -- Index
- 3.4 Advanced Aspects -- 3.4.1 The issue of added mass -- 3.4.2 From sectional to three-dimensional VIV -- 3.4.3 VIV of noncircular cross-sections -- 3.4.4 Summary and concluding remarks -- 4 Wake-Induced Instabilities of Pairs and Small Groups of Cylinders -- 4.1 The Mechanisms -- 4.1.1 Modified quasi-steady theory -- 4.1.2 The damping-controlled mechanism -- 4.1.3 The wake-flutter mechanism -- 4.2 Wake-Induced Flutter of Transmission Lines -- 4.2.1 Analysis for a fixed windward conductor -- 4.2.2 Analysis for a moving windward conductor -- 4.2.3 Three-dimensional effects and application to real transmission lines -- 4.3 Fluidelastic Instability of Offshore Risers -- 4.3.1 Experimental evidence for the existence of fluidelastic instability in riser bundles -- 4.3.2 Analytical models -- 5 Fluidelastic Instabilities in Cylinder Arrays -- 5.1 Description, Background, Repercussions -- 5.2 The Mechanisms -- 5.2.1 The damping-controlled one-degree-of-freedom mechanism -- 5.2.2 Static divergence instability -- 5.2.3 The stiffness-controlled wake-flutter mechanism -- 5.2.4 Dependence of the wake-flutter mechanism on mechanical damping -- 5.2.5 Wake-flutter stability boundaries for cylinder rows -- 5.2.6 Concluding remarks -- 5.3 Fluidelastic Instability Models -- 5.3.1 Jet-switch model -- 5.3.2 Quasi-static models -- 5.3.3 Unsteady models -- 5.3.4 Semi-analytical models -- 5.3.5 Quasi-steady models -- 5.3.6 Computational fluid-dynamic models -- 5.3.7 Nonlinear models -- 5.3.8 Nonuniform flow -- 5.4 Comparison of the Models -- 5.4.1 Experimental support for and against Connors' equation -- 5.4.2 Comparison of theoretical models with experimental data -- 5.4.3 State of the art -- 6 Ovalling Instabilities of Shells in Cross-Flow -- 6.1 A Historical Perspective -- 6.2 The Vortex-Shedding Hypothesis -- 6.3 Ovalling with No Periodic Vortex Shedding
- Cover -- Half-title -- Title -- Copyright -- Contents -- Preface -- 1 Introduction -- 1.1 General Overview -- 1.2 Concepts and Mechanisms -- 1.2.1 Self-excited oscillations and instabilities -- 1.2.2 Argand diagrams and bifurcations -- 1.2.3 Energy considerations -- 1.3 Notation -- 1.4 Contents of the Book -- 2 Prisms in Cross-Flow -- Galloping -- 2.1 Introductory Comments -- 2.2 The Mechanism of Galloping -- 2.2.1 The linear threshold of galloping -- 2.2.2 Nonlinear aspects -- 2.3 Further Work on Translational Galloping -- 2.3.1 The effect of sectional shape -- 2.3.2 Novak's ``universal response curve'' and continuous structures -- 2.3.3 Unsteady effects and analytical models -- 2.3.4 Some comments on the flow field -- 2.3.5 Shear-layer reattachment -- 2.4 Low-Speed Galloping -- 2.5 Prisms and Cylinders with a Splitter Plate -- 2.6 Wake Breathing and Streamwise Oscillation -- 2.6.1 Wake breathing of the first type -- 2.6.2 Wake breathing of the second type -- 2.7 Torsional Galloping -- 2.7.1 General comments -- 2.7.2 Linear quasi-steady analysis -- 2.7.3 Nonlinear quasi-steady analysis -- 2.7.4 Disqualification of quasi-steady theory -- 2.7.5 Unsteady theory -- 2.8 Multi-Degree-of-Freedom Galloping -- 2.8.1 Quasi-steady models -- 2.8.2 Unsteady models -- 2.9 Turbulence and Shear Effects -- 2.10 Conjoint Galloping and Vortex Shedding -- 2.11 Elongated and Bridge-Deck Sections -- 2.12 Concluding Remarks -- 3 Vortex-Induced Vibrations -- 3.1 Elementary Case -- 3.2 Two-Dimensional VIV Phenomenology -- 3.2.1 Bluff-body wake instability -- 3.2.2 Wake instability of a fixed cylinder -- 3.2.3 Wake of a cylinder forced to move -- 3.2.4 Cylinder free to move -- 3.3 Modelling Vortex-Induced Vibrations -- 3.3.1 A classification of models -- 3.3.2 Type A: Forced system models -- 3.3.3 Type B: Fluidelastic system models -- 3.3.4 Type C: Coupled system models