Hi all,
I recently try to get the hydrodynamic trim and draft of a vessel at certain speed, but I'm quite confused about which software and function is the best way to do so.
I have a 3D model of the vessel, I wish to know how it will response to steady current, no wave. I'm interested to know its pitch and heave after the vessel reach equilibrium.
Modeler has a hydro-static table, but it is not what I want.
I thought motion can obtain this piece of information, but so far what I can find is always frequency dependent, but not steady (f=0Hz?)
Resistance doesn't have DOF in trim, does it?
Stability seems like only focus on heeling, quite off from what I'm looking for.
Any suggestion will be appreciated.
Sam
Hi Sam,
Two of the empirical formulas in MAXSURF Resistance will give you the vessel running trim. Blount and Fox and Savitsky Planning. If these are your vessel types then you have an answer there.
If that isn't your hull type or speed regime, then I'm not sure what your options are. The 2d strip theory used in MAXSURF Motions doesn't present a running trim although I believe there are calculations based on Strip Theory that calculate it.
Regards,
James
Hi James,
Thanks for your guide, I have just went through the running trim vs speed analysis in the software and its manual.
Unfortunately, as you have mentioned, those methods (Savitsky planning & Blount and Fox) don't work on my cat, while slender body doesn't support this analysis. Anyway, it is still good to learn something new to me.
Cheers,