GZ curve

[mallia.s]

Hi,

I have modelled a hull in Maxsurf Demo version, and would require to extract its GZ curve. Unfortunately in the Demo, or the academic version, this is not a feasible option.

Is there a FREE software that I can develop the GZ curve after being imported from Maxsurf?


Thanks

Steve

[marshmat]

I suppose you could try ArchimedesMB ( http://naval-architecture.co.uk/ ). As with all computerized analysis, the GIGO rule applies (garbage in, garbage out) - the analysis won't mean much until you take the time to go through the program and figure out exactly what each parameter and option means.

[mallia.s]

Hi,

Thanks for your help. But how can I import the model I have already drawn from Maxsurf? Is there a particular format?


Thanks


Steve

[marshmat]

ArchimedesMB can read GHS files, which I believe Maxsurf is capable of generating.

[mallia.s]

Hi,

Apparently, Maxsurf only reads (imports) a file of GHS format.


Thanks

Steve

[zeroname]

If u did it in Maxsurf academic ,,, save it as 3d IGES or rhino 3dm ..
now open it in rhino and Save it as GHS format to load in Archimedes..
i assume u have rhino.

[mallia.s]

Hi all,

I did all you said, and I did import it in Archimedes. But I only managed to extract the KN curves not the GZ curve... What am I doing wrong?


thanks


steve

[Martijn_vE]

You are practically there.
The Kn curves are the stability curves for a VCG height of zero.
For each heeling angle phi subtract VCG*sin(phi) to obtain your righting lever GZ, so GZ=KN-VCG*sin(phi)