Preface ........................................................ ix
1 Introduction ................................................. 1
1.1 General Overview ........................................ 1
1.2 Concepts and Mechanisms ................................. 3
1.3 Notation ............................................... 13
1.4 Contents of the Book ................................... 14
2 Prisms in Cross-Flow - Galloping ............................ 15
2.1 Introductory Comments .................................. 15
2.2 The Mechanism of Galloping ............................. 19
2.3 Further Work on Translational Galloping ................ 30
2.4 Low-Speed Galloping .................................... 50
2.5 Prisms and Cylinders with a Splitter Plate ............. 55
2.6 Wake Breathing and Streamwise Oscillation .............. 62
2.7 Torsional Galloping .................................... 66
2.8 Multi-Degree-of-Freedom Galloping ...................... 77
2.9 Turbulence and Shear Effects ........................... 81
2.10 Conjoint Galloping and Vortex Shedding ................. 86
2.11 Elongated and Bridge-Deck Sections ..................... 90
2.12 Concluding Remarks .................................... 102
3 Vortex-Induced Vibrations .................................. 105
3.1 Elementary Case ....................................... 105
3.2 Two-Dimensional VIV Phenomenology ..................... 108
3.3 Modelling Vortex-Induced Vibrations ................... 124
3.4 Advanced Aspects ...................................... 139
4 Wake-Induced Instabilities of Pairs and Small Groups of
Cylinders .................................................. 155
4.1 The Mechanisms ........................................ 155
4.2 Wake-Induced Flutter of Transmission Lines ............ 160
4.3 Fluidelastic Instability of Offshore Risers ........... 195
5 Fluidelastic Instabilities in Cylinder Arrays .............. 215
5.1 Description, Background, Repercussions ................ 215
5.2 The Mechanisms ........................................ 220
5.3 Fluidelastic Instability Models ....................... 232
5.4 Comparison of the Models .............................. 274
6 Ovalling Instabilities of Shells in Cross-Flow ............. 291
6.1 A Historical Perspective .............................. 291
6.2 The Vortex-Shedding Hypothesis ........................ 293
6.3 Ovalling with No Periodic Vortex Shedding ............. 296
6.4 Further Evidence Contradicting Vortex-Shedding
Hypothesis ............................................ 304
6.5 Counterattack by the Vortex-Shedding Proponents and
Rebuttal .............................................. 311
6.6 Simple Aeroelastic-Flutter Model ...................... 314
6.7 A Three-Dimensional Flutter Model ..................... 322
6.8 An Energy-Transfer Analysis ........................... 334
6.9 Another Variant of the Aeroelastic-Flutter Model ...... 338
6.10 Concluding Remarks .................................... 344
7 Rain-and-Wind-Induced Vibrations ........................... 345
7.1 Experimental Evidence ................................. 345
7.2 Modelling Rainwater Rivulets .......................... 348
7.3 VIV, Galloping and Drag Crisis ........................ 351
7.4 Yamaguchi's Model: A Cylinder-Rivulet-Coupled
Instability ........................................... 354
7.5 Concluding Remarks .................................... 355
Epilogue ...................................................... 357
Appendix A The Multiple Scales Method ........................ 359
Appendix В Measurement of Modal Damping for the Shells Used
in Ovalling Experiments ........................... 361
References .................................................... 365
Index ......................................................... 397
|
