seakeeping analysis (RAO)

[fazrin azwan]

hi,
i've done seakeeping analysis by using Maxsurf Seakeeper.
my analysis is comparing the RAO for heave and pitch motion on different wave height.
however, the results obtained is a same graph of heave and pitch for all wave height.
is it true?
if not, what is it that i'm possibly wrong?

really need help.

thank you.

 

[jehardiman]

Response Amplitude Operators (RAOs) are non-demsionalized factors and are assumed to be linear. They are constant for all wave heights (amplitudes really) of a given period.

Therefore

heave response amplitude (ft or m) = wave amplitude (ft or m) * RAO

and

pitch response amplitude (rad) = wave amplitude (ft or m)/characteristic length (ft or m) * RAO

 

[fazrin azwan]

thank you sir.
really appreciated that.