PREDICTION OF WAVE FORCES FROM NONLINEAR RANDOM SEA SIMULATIONS

By KENNETH SANCHEZ

CONTENTS INTRODUCTION CLASSES OF OFFSHORE STRUCTURES REVIEW OF THE FUNDAMENTAL EQUATIONS AND CONCEPTS EQUATIONS OF MOTION ROTATIONAL AND IRROTATIONAL ?OWS VELOCITY POTENTIAL EULER’S EQUATIONS AND THEIR INTEGRATION STREAM FUNCTION BASIC INVISCID ?OWS FORCE ON A CIRCULAR CYLINDER IN UNSEPARATED INVISCID ?OW SLOW MOTION OF A SPHERICAL PENDULUM IN VISCOUS ?OW ADDED MASS OR ADDED INERTIA 2 10 AN EXAMPLE OF THE ROLE OF THE ADDED INERTIA 2 11 FORCES ON BODIES IN SEPARATED UNSTEADY ?OW 2 12 KINETIC ENERGY AND ITS RELATION TO ADDED MASS SEPARATION AND TIME-DEPENDENT ?OWS INTRODUCTION AND KEY CONCEPTS CONSEQUENCES OF SEPARATION BODY AND SEPARATION STROUHAL NUMBER NEAR WAKE AND PRINCIPAL DIF?CULTIES OF ANALYSIS LIFT OR TRANSVERSE FORCE FREE-STREAM TURBULENCE AND ROUGHNESS EFFECTS IMPULSIVELY STARTED ?OWS INTRODUCTORY COMMENTS REPRESENTATIVE IMPULSIVELY STARTED ?OWS SINUSOIDALLY OSCILLATING ?OW FOURIER-AVERAGED DRAG AND INERTIA COEF?CIENTS EXPERIMENTAL STUDIES ON CD AND CM TRANSVERSE FORCE AND THE STROUHAL NUMBER ROUGHNESS EFFECTS ON CD, CM, CL, AND ST IN SOF A CRITICAL ASSESSMENT OF THE MORISON EQUATION OSCILLATORY PLUS MEAN ?OW OR THE IN-LINE OSCILLATIONS OF A CYLINDER IN STEADY ?OW FORCED OSCILLATIONS OF A CYLINDER IN A TROUGH OSCILLATORY ?OW IN A SMALLER U-SHAPED WATER TUNNEL WAVES AND WAVE–STRUCTURE INTERACTIONS SURFACE GRAVITY WAVES LINEAR WAVE THEORY HIGHER-ORDER WAVE THEORIES CHARACTER OF THE FORCES PREDICTED RANDOM WAVES REPRESENTATIVE FREQUENCY SPECTRA WAVE–STRUCTURE INTERACTION PRINCIPAL FACTORS OF ANALYSIS AND DESIGN DESIGN WAVE AND FORCE CHARACTERIZATION FORCE-TRANSFER COEF?CIENTS A BRIEF SUMMARY OF THE LITERATURE GIVING EXPLICIT CD AND CM VALUES SUGGESTED VALUES FOR FORCE-TRANSFER COEF?CIENTS EFFECTS OF ORBITAL MOTION, COEXISTING CURRENT, PILE ORIENTATION, INTERFERENCE, AND WALL PROXIMITY PIPE LINES AND WALL-PROXIMITY EFFECTS WAVE IMPACT LOADS WAVE FORCES ON LARGE BODIES THE CASE OF LINEAR DIFFRACTION FROUDE–KRYLOV FORCE THE CASE OF A CIRCULAR CYLINDER HIGHER-ORDER WAVE DIFFRACTION AND THE FORCE ACTING ON A VERTICAL CYLINDER CLOSING REMARKS VORTEX-INDUCED VIBRATIONS KEY CONCEPTS NOMENCLATURE ADDED MASS, NUMERICAL SIMULATIONS, AND VIV GOVERNING AND IN?UENCING PARAMETERS PARAMETER SPACE UNCERTAINTIES MASS AND STRUCTURAL DAMPING FVAC, FCOM, AND ADDED MASS LINEARIZED EQUATIONS OF SELF-EXCITED MOTION UNSTEADY FORCE DECOMPOSITION LIGHTHILL’S FORCE DECOMPOSITION LIMITATIONS OF FORCED AND FREE VIBRATIONS GENERAL DISCUSSION AMPLITUDE AND PHASE MODULATIONS EXPERIMENTS WITH FORCED OSCILLATIONS A BRIEF SUMMARY OF THE EXISTING CONTRIBUTIONS DETAILED DISCUSSION OF MORE RECENT EXPERIMENTS THE WAKE AND THE VIV 6 10 SELF-EXCITED VIBRATIONS 6 11 DISCUSSION OF FACTS AND NUMERICAL MODELS 6 12 SUPPRESSION DEVICES 6 13 EVOLUTION OF NUMERICAL MODELS 6 14 EXPERIMENTS WITH ADVANCED MODELS HYDRODYNAMIC DAMPING ELEMENTS OF DAMPING STOKES CANONICAL SOLUTIONS PREVIOUS INVESTIGATIONS REPRESENTATIVE DATA SOLID CYLINDERS PERFORATED CYLINDERS THREE-DIMENSIONAL INSTABILITIES REFERENCES