《SEA LOADS ON SHIPS AND OFFSHORE STRUCTURES》

1Introduction1

Denitions of motions3

Traditional ship problems5

Oshore structure problems8

Hydrodynamic classication of structures10

Engineering tools11

2Sea environment13

Basic assumptions13

Regular wave theo17

Statistical description of waves23

Wind31

Current33

Exercises34

3 Linear wave-induced motions and loads on oatingstructures37

Response in irregular sea37

Response in regular waves39

Discussion on natural periods, damping and excitationlevel68

Linear wave-induced motions and loads on a tension legplatform (TLP) in the mass-force domain74

Heave motion of a semi-submersible76

Minimalization of vertical ship motions81

Roll stabilization85

Exercises89

4 Numerical methods for linear wave-induced motionsand loads102

Source technique103

Alternative solution procedures118

Forward speed and current eects122

Exercises127

5 Second-order non-near problems131

Mean wave (drift) forces and moments134

Slow-drift motions in irregular waves155

Slowly-vaing oscillations due to wind166

Sum-frequency eects168

Exercises170

6Current and wind loads174

Steady incident ow past a circular cylinder174

Boundary layers178

Wake behaviour181

Vortex shedding184

Current loads on ships187

Current loads on oshore structures200

Wind loads207

Vortex-induced resonance oscillations207

Galloping212

Exercises215

7Viscous wave loads and damping223

Morison’s equation223

Flow separation228

Oscillato non-separated ow234

Separated ow at small KC-numbers238

Separated ow at high KC-numbers244

Experimental tools249

Exercises253

8Stationkeeping257

Mooring systems257

Thruster forces270

Thruster performance and dynamic positioning276

Exercises277

9 Water impact and entry282

Slamming282

Water ent problems296

Exercises308

References316

Index324