Comments (3)
It suddenly occurs to me that the Mass of Surge, sway and heave should be the total mass of a FOWT.....
Take the NREL 5MW ITI Barge for example, the Total mass is:
HubMass=56780; NacMass=240000; PtfmMass=5.452E+06; TwrMass=347460; BldMass=17740;
I_Mass_Surge = HubMass + NacMass + PtfmMass + TwrMass + 3×BldMass;
= 56780 + 240000 + 5.452E+06 + 347460 + 3×17740;
= 6.14946E+06 KG;
from openfast.
Dear @Melancho7ee,
The 6x6 rigid-body mass matrix from the documentation you refer to should should have the following form:
where
m = full-system mass, including ballast
(x_g,y_g,z_g) = center of mass relative to the platform reference point
(I_11,I_12,…I_33) = inertias relative to the platform reference point
Best regards,
from openfast.
Dear @Melancho7ee,
The 6x6 rigid-body mass matrix from the documentation you refer to should should have the following form:
where m = full-system mass, including ballast (x_g,y_g,z_g) = center of mass relative to the platform reference point (I_11,I_12,…I_33) = inertias relative to the platform reference point
Best regards,
Dear @jjonkman,
Thank you! I have figured it out with your answer.
Best regards,
from openfast.
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