Calculate Morison's equation combined wave slamming loads and wave loads on horizontal cylinders for Airy, Stokes and cnoidal waves.
Wave slamming loads occur on the front side of the wave only, and are due to the impact of the wave surface against the structure. The combined wave loading includes wave drag load, inertia load, lateral load and buoyancy load. The wave velocity and acceleration is calculated at the wave surface, hence the height above the seabed varies with wave phase angle. Wave loads can either be calculated from phase angle, or calculated for the maximum load magnitude. Loads are force per length (unit loads). Currents are assumed to be parallel to the waves. Wave spreading accounts for multi directional waves. The wave is assumed to contact the diameter of the whole cylinder simultaneously (ie the cylinder diameter is much smaller than the wave height - wave curl is ignored). Wave and current loads are calculated at the center of the pipe.
Use the Result Plot option to display either the wave profiles versus phase angle, wave velocity versus phase angle, or wave loads versus phase angle.
Tool Input
- hwtype : Wave And Current Heading Type
- Φwu : User Defined Wave And Current Heading
- sfactype : Shape Type
- su : User Defined Spreading Factor
- rdtype : Reduction Factor Type
- Rwu : User Defined Wave Reduction Factor
- Rcu : User Defined Current Reduction Factor
- uctype : Current Velocity Type
- roughtype : Seabed Roughness Type
- zou : User Defined Seabed Roughness
- lttype : Wave Parameter Type
- Tu : User Defined Wave Period
- Lu : User Defined Wave Length
- wavetype : Wave Type
- phasetype : Wave Phase Angle Type
- Θu : User Defined Phase Angle
- C : Load Coefficients
- Φs : Structure Absolute heading
- OOD : Outer Diameter Including Layers
- d : Water Depth
- H : Wave Height
- Vr : Reference Velocity
- zr : Reference Height Above Seabed
- ρ : Fluid Density
Tool Output
- Θ : Wave Phase Angle
- Φ : Force Heading Relative To Horizontal
- Φw : Wave Relative heading
- η : Wave Profile Height Relative To Sea Level
- Ah : Wave Horizontal Acceleration
- Av : Wave Vertical Acceleration
- Fb : Vertical Buoyancy Load
- Fdx : Horizontal Drag Load
- Fdz : Vertical Drag Load
- Fl : Vertical Lift Load
- Fmx : Horizontal Inertia Load
- Fmz : Vertical Inertia Load
- Fs : Horizontal Slamming Load
- Ft : Total Force
- Fx : Horizontal Force
- Fz : Vertical Load
- Kc : Keulegan Carpenter Number
- L : Wave Length
- Rc : Current Velocity Reduction Factor
- Rw : Wave Velocity Reduction Factor
- T : Wave Period
- Vc : Current Velocity
- Vh : Wave Horizontal Velocity
- Vv : Wave Vertical Velocity
- Vx : Horizontal Velocity
- c : Wave Celerity
- cvg : Convergence Check
- sf : Wave Spreading Factor
- w : Wave Trough Height Above Seabed
- zh : Center Of Pipe Height Above Seabed
- zo : Seabed Roughness
- zs : Surface Elevation