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*RAO,Load |
 
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*RAO,Load
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*RAO,Load |
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To specify RAO load data for a frequency domain analysis.
Refer to Frequency Domain Analysis for further information on this feature.
Blocks of lines defining the RAO load data. Each block contains three lines specifying the incident wave frequency and the relevant RAO amplitudes and phases for this wave frequency, as shown below. Note that entries shown below in italics should be replaced with their actual numeric values in the RAO file.
Wave Frequency
Heave RAO, Surge RAO, Sway RAO, Yaw RAO, Roll RAO, Pitch RAO
Heave Phase, Surge Phase, Sway Phase, Yaw Phase, Roll Phase, Pitch Phase
The block of three lines specifying the incident wave frequency, RAOs and phases are repeated as often as necessary until the RAOs are defined over the required range of wave frequencies.
This keyword is only relevant for frequency domain dynamic analysis.
Input: |
Description |
Frequency: |
The wave frequency in Hertz. |
Heave RAO: |
The RAO in heave, corresponding to the specified frequency. |
Surge RAO: |
The RAO in surge, corresponding to the specified frequency. |
Sway RAO: |
The RAO in sway, corresponding to the specified frequency. |
Yaw RAO: |
The RAO in yaw, corresponding to the specified frequency. |
Roll RAO: |
The RAO in roll, corresponding to the specified frequency. |
Pitch RAO: |
The RAO in pitch, corresponding to the specified frequency. |
Heave Phase: |
The phase angle corresponding to the heave RAO. |
Surge Phase: |
The phase angle corresponding to the surge RAO. |
Sway Phase: |
The phase angle corresponding to the sway RAO. |
Yaw Phase: |
The phase angle corresponding to the yaw RAO. |
Roll Phase: |
The phase angle corresponding to the roll RAO. |
Pitch Phase: |
The phase angle corresponding to the pitch RAO. |
(a)You must specify an RAO file name using this table if you identify vessel loads using the Loads – Vessel table.
(b)This table is only relevant for frequency domain analysis.