Buoy Forces |
 
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Buoy Forces |
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Sinusoidally varying point loads are applied directly in the local axes (heave, surge and pitch) at the CoG node, calculated from the force RAO data using the following equation:
(1)
where:
•Fi is the force in degree of freedom i
•Aw is the wave amplitude
•Ri is the force RAO for degree of freedom i
•k is the regular wave number (calculated by Flexcom)
•S is the distance of the CoG node from the vertical axis (Y=Z=0) at the start of the dynamic analysis (calculated by Flexcom)
•ω is the regular wave circular period
•t is the current analysis or simulation time
•φi is the force phase angle
•*CALM LOAD is used to specify data defining the force terms to be applied to a CALM buoy.
If you would like to see an example of how this keyword is used in practice, refer to E01 - CALM Buoy - Simple.