Calculate combined ocean wave and current reduced velocity and acceleration for Airy, Stokes and cnoidal waves.
Wave length can be calculated from wave period, or wave period can be calculated from wave length. Current velocity can be calculated near the seabed using either the logarithmic profile, or the 1/7th power law profile. The velocity and acceleration can be calculated at either the wave surface (varies with phase angle), the wave trough height, the seabed, or at a user defined height above the seabed.
The wave and current reduction factors can be used when the wave and current direction is at an angle to the pipeline or structure (ie not perpendicular). A relative heading of zero degrees is parallel to the structure, or ninety degrees is perpendicular to the structure. Wave spreading accounts for choppiness, or multiple superimposed wave directions. The current direction can be set paralllel to the wave direction, or independent of the wave direction.
Use the Result Plot option to plot the wave profiles, wave velocity or wave acceleration versus phase angle.
Tool Input
- hwtype : Wave Heading Type
- Φwu : User Defined Wave Heading
- hctype : Current Heading Type
- Φcu : User Defined Current Heading
- sfactype : Wave Spreading Factor Type
- su : User Defined Spreading Factor
- rdtype : Velocity 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
- wavetype : Wave Type
- lttype : Wave Parameter Type
- Tu : User Defined Wave Period
- Lu : User Defined Wave Length
- phasetype : Phase Angle Type
- Θu : User Defined Phase Angle
- xu : User Defined Displacement
- tu : User Defined Time
- ztype : Height Above Seabed Type
- zhu : User Defined Height
- Φs : Structure Heading
- d : Water Depth
- H : Wave Height
- Um : Reference Velocity
- zm : Reference Height Above Seabed
Tool Output
- Θ : Wave Phase Angle
- Φc : Current Heading Relative To Structure
- Φw : Wave Heading Relative To Structure
- η : Wave Surface Relative To Mean Sea Level
- Ah : Wave Reduced Horizontal Acceleration
- Am : Wave Reduced Acceleration Magnitude
- Av : Wave Reduced Vertical Acceleration
- L : Wave Length
- Rdc : Current Reduction Factor
- Rdw : Wave Reduction Factor
- T : Wave Period
- Vc : Current Reduced Velocity
- Vc/Vt : Current Velocity Over Horizontal Velocity Ratio
- Vh : Wave Reduced Horizontal Velocity
- Vm : Wave Reduced Velocity Magnitude
- Vt : Total Reduced Horizontal Velocity
- Vv : Wave Reduced Vertical Velocity
- c : Wave Celerity
- cvg : Convergence Check
- ro : Seabed Roughness
- sp : Spreading Factor
- zh : Height Above Seabed
- zs : Wave Surface Height Above Seabed
- zw : Wave Trough Height Above Seabed