Practical Experiences with Flow-Induced Vibrations

Symposia in the areas of fluid mechanics and hydraulics are, in many cases, strongly oriented toward the researcher, with only peripheral participation of the practicing engineer. The possible danger therein is an increased emphasis on those problems that are theoretically or experimentally attractive, rather than those that would most effectively lead to improved design criteria. To bring the practical aspects of flow-induced vibrations to the forefront, and to enhance in­ terchange of information on shortcomings of design criteria, it was decided to extend invitations to fielrl engineers, designers and researchers. The leading theme of the Symposium would be experiences from practice, encompassing informa­ tion on failures, fatigue, and wear; and wherever possible, the associated cures would be addressed as well. Moreover, to promote interaction between disciplines, a variety of specialities, ranging from tall structures to heat exchanger and re­ actor components, was included; but to keep the undertaking within a reasonable scope, topics dealing with slender body aerodynamics, and high-speed internal and external flow, were not incorporated. During this planning phase, many of our colleagues encouraged us to follow through with the spirit of the Symposium, and provided a number of helpful suggestions. It was gratifying to receive the en­ dorsement of the International Association for Hydraulic Research and the Inter­ national Union for Theoretical and Applied Mechanics, as the variety of interests represented by these organizations enhanced the theme of the Symposium.

Technical Session A: REACTOR AND HEAT-EXCHANGER COMPONENTS.- A1 Flow-Induced Vibrations in Nuclear Reactors and Heat Exchangers (General Lecture).- A2 Heat Exchanger Tube Vibration: Comparison between Operating Experiences and Vibration Analyses (Invited Paper).- A3 Tube Vibrations in Large Condensers.- A4 Flow-Induced Vibration of Reactor System Components: Heat Exchanger Tubes, Flow Collector, and Thermowell.- A5 Excitation, Amplification and Suppression of Flow-Induced Vibrations in Heat Exchangers.- A6 Response of a Tube Bank to Crossflow Induced Excitation at Trans- and Supercritical Reynolds Numbers.- A7 Flow Induced Vibration Problems in Gas Cooled Reactors.- A8 Treatment of Flow-Induced Pendulum Oscillations.- A9 Main Steam Piping Vibration Driven by Flow-Acoustic Excitation.- A10 Pipe Line Vibration Driven by Flow-Acoustic Excitation.- A11 Vibrations in Pipe Line Systems.- A12 Flutter of Plates and Shells in Practice (Invited Paper).- A13 The Flow Induced Response of Reactor Pressure Vessel Thermal Insulation.- A14 Core Barrel Oscillations During Blowdown of a Pressurized Water Reactor.- A15 Flow-Induced Vibration in Heat-Exchanger Tube Banks.- A16 Vibration Experiences with a Fuel Pin Model System in a Parallel Two-Phase Flow.- A17 Flow-Induced Vibrations of Plates, Single Cylinders, and Tube Bundles.- A18 Instability in the Vessel of a Pressurized Water Reactor.- A19 Acoustic Phenomena in a Steam Generator.- A20 Sound Induced Vibration in Corrugated Pipes.- A21 Vibrations of Tube Bundles.- Technical Session B: HYDRAULIC MACHINERY AND EQUIPMENT.- B1 Some TVA Experiences with Flow-Induced Vibrations (Invited Paper).- B2 Hydroturbine Rotor Vibration.- B3 Vibration Phenomena on Hydraulic Axial Turbines.- B4 Dynamic Stresses on Stay Vanes of Vertical-Shaft Large-Size Francis Turbines.- B5 Flow-Induced Cracks on Stay Vanes.- B6 Aerodynamic Blade Excitation in Turbo-compressors.- B7 Experiences with Flow-Induced Vibrations at Sulzer (Invited Paper).- B8 Pressure in the Draft Tube of Francis Turbine.- B9 Vibrational Problems with Mixed-Flow Pumps.- B10 Swirling-Flow Induced Vibrations in Turbomachine Exit Chambers.- B11 Self-Excited Oscillations in a Hydro-Electric Unit.- B12 Reduction of Vibrations in a Centrifugal Pump Hydraulic System.- B13 Flow-Induced Vibrations in Valves Operating at Small Openings (Invited Paper).- B14 Governing Valve Vibrations in a Large Steam Turbine.- B15 Flow-Induced Vibrations of an Anchor Agitator.- B16 Vibrations of a Pump Column under Vortexing Conditions.- B17 Vibrations of a Cantilevered Pump Column.- B18 Rock Drilling Tool with Pulsed Jets.- B19 Fluid Wave-Rotor Motion Resonance in a Fluid Line-Roots Flow Meter System.- Technical Session C: HYDRAULIC STRUCTURES.- C1 Development of Vibration-Free Gate Design: Learning from Experience and Theory (General Lecture).- C2 Bureau of Reclamation Experience with Flow-Induced Vibrations (Invited Paper).- C3 Corps of Engineers Experiences with Flow-Induced Vibrations (Invited Paper).- C4 Hydroelasticity Effects in Hydraulic Engineering Practice (Invited Paper).- C5 Stability of Vertically Movable Gates.- C6 Causes and Remedy of Vibrations of a High-Head Gate.- C7 Gate Vibration at El Chocon Hydro-Power Scheme, Argentina.- C8 Excitation and Vibration of a Grid Gate.- C9 Dynamic Instability of Tainter-Gates.- C10 Vibrations due to Two-Phase Flow below a Tainter Gate.- C11 Flap Gate Oscillation.- C12 Some Experiences with Curing Flap-Gate Vibrations.- C13 Vibration of a Weir with Overflow and Underflow.- C14 Seal Vibration (Invited Paper).- C15 Barkley Dam Gate Vibrations.- C16 Hydraulically Induced Vibrations in a Bear-Trap Weir.- C17 Vibration due to Leakage through a Reverse Radial Gate.- C18 Vibrations of the Bolarque Dam.- C19 Eliminating Pressure Fluctuations at the Floating Bulkheads of the Guri Dam Project.- C20 Self-Excited Oscillatory Surface Waves around Cylinders.- C21 On Identification and Preliminary Assessment of Sources of Flow-Induced Vibrations.- Technical SessionD: SHIP STRUCTURES.- D1 Review of Theoretical and Experimental Procedures for Prediction of Ship-Propeller Induced Excitations (General Lecture).- D2 Calculations, Measurements and Resulting Remedies for Vibration Problems on Ro/Ro Ships.- D3 Propeller Singing.- D4 Propeller Exciting Forces Estimated from Measured Acceleration of Vertical Hull Vibration of Ships.- Technical Session E: OCEAN STRUCTURES.- E1 Dynamics of Offshore Structures: Problems, Solutions, and Benefits (General Lecture).- E2 Wave-Induced Vibration of Offshore Structures (Invited Paper).- E3 Current-Induced Oscillations of Cognac Piles During Installation - Prediction and Measurement.- E4 Transverse Motion of a Buoy by Surface Wave.- E5 Suppression of Flow-Induced Motions of a Submerged Moored Cylinder.- Technical Session F: BRIDGE DECKS, BEAMS, AND CABLES.- F1 On the State of Stability Considerations for Suspended-Span Bridges under Wind (General Lecture).- F2 Vortex Shedding Oscillations of Bridge Deck Sections.- F3 Model and Full Scale Response to Wind Action of the Cable Stayed Box Girder West Gate Bridge.- F4 On Subspan Oscillation of Two Coupled Conductors with One in the Wake of Another.- F5 Wind-Induced Oscillations of Some Steel Structures (Invited Paper).- F6 Approaches to the Suppression of Wind-Induced Vibrations of Structures (Invited Paper).- F7 Torsional Flutter of Large-Scale Model of Suspension Bridge Truss Deck in Natural Turbulent Wind.- F8 Traffic-Induced Vibrations of a Motorway Sign Gantry.- Technical Session G: HIGH-RISE BUILDINGS AND STRUCTURES.- G1 The Influence of Turbulence on the Aeroelastic Responses of Tall Structures to Wind (General Lecture).- G2 Assessment of Wind Loads for Glazing Design (Invited Paper).- G3 Wind-Induced Vibrations of Towers and Stacks (Invited Paper).- G4 Experiences with Cross-Wind Vibrations of Columns and Chimneys.- G5 Oscillation due to Vortex Shedding of Reinforced Concrete Chimneys of Rectangular Cross-Section.- G6 Field Tests on a Tall Tower-Supported Steel Stack.- G7 The use of Slats to Suppress Vortex-Induced Oscillations of Slender Structures.- G8 Damping of Structures Containing Fluids and their Relevance to Wind-Induced Vibrations.- G9 The Wind-Induced Vibration of a Tall Building.- G10 Several Examples of Wind-Induced Vibrations.- G11 Tower Crane in Turbulent Wind.- Workshop: PREDICTION AND MODELLING OF FLOW-INDUCED VIBRATIONS.- H1 Summary.- H2 An Introduction to the Discrete Vortex Method.- H3 Nonlinear Oscillator Modelling of Flow Induced Vibrations.- H4 Use of Oscillator Models for Identifying the Danger for Flow-Induced Vibrations in a Complex System.- H5 Studies of Flow Instabilities in Two Dimensional Test Sections with Sudden Expansions.- Panel Discussion: CRITICAL UNRESOLVED PROBLEMS.- J1 Summary.- J2 Unresolved Problems Bridge Decks, Beams and Cables.- J3 Wind Effects on Buildings and Structures - Critical Unresolved Problems.- J4 Flow-Induced Vibrations of Heat-Exchanger and Reactor Components - Critical Unresolved Problems.- J5 Critical Unresolved Problems in Flow-Induced Vibration of Heat Exchangers.- J6 Hydraulic Structures - Critical Unresolved Problems.- J7 Critical Unresolved Problems of Flow-Induced Vibrations in Hydraulic Machinery and Equipment.- J8 Critical Unresolved Problems in Flow-Induced Vibration of Ocean Structures.- Film Session.