Well, that is strange. First time I opened the iges in Inventor the two
surfaces were side-by-side and I could clearly see the flaw. I tried to
import it to MDT but guess I don't know how to do that and couldn't find
anything in help except how to create one. I saved it as a sat but that
didn't work; I think maybe surfaces can be brought into MDT as sat files.
Anyway, I extracted the file if CF again and opened it in Inventor again,
and now the two surfaces are stacked on top of one another instead of
side-by-side, but it's probably still in memory and I will have to start
Inventor again. Can you say how to get an iges surface into MDT? Bet it's a
command-line thingy which I try to avoid whenever possible.
"...profile weight value is too high."
I don't think I know exactly what that means. The profile shape could be
adjusted to make it work, maybe?
"...a :maintain value too large"
This either. No idea what a "maintain" value is.
Todd Shipyard was a long time back and I mostly worked with the sections
that had already been put together, (flushing off welds, burning in decks,
burning out holes, untangling hose, etc.) but I think, for the most part,
the skin started out as plane ol' flat plate. The welders would weld it in
place on one end and weld some pad-eyes on beside the location of a rib.
Then the ship fitter would put a jack on the inside of the rib, use the jack
to bend the plate around the rib and the welder would tack it in place. Then
they would repeat that procedure until that piece of skin was flush to the
ribs.
~Larry
"Jeff Howard" wrote in message
news:5AFE6D472B7C7E7DC30F62186F95C686@in.WebX.maYIadrTaRb...
> Hi, Larry.
>
> > U & V the same or opposite .......
>
> I think it means that some of the flow lines (U/V's) are folding or
looping
> back onto themselves. I notice it most when a profile weight value is too
> high. I put an IGES in CF that, I think, illustrates what's happening.
It
> can be imported into MDT and viewed. The middle surfaces were "blended"
> between two planar surfaces with a "maintain" value too large to allow the
> transition to solve correctly and causes some of the flow lines to loop
back
> onto themselves. There are also "good" surfaces and wires shown for
> comparison. The different entities are segregated by layers with
descriptive
> names.
>
> > 10,000 seats of Inventor going to .....
>
> Yea, the CSSC deal. Probably a lot of politics, smoke and mirrors
involved
> there. "The collaborative capabilities of Autodesk's software will help
CSSC
> promote digital information exchange among ship design enterprises and
ship
> owners." Web noodles and balancing international trade deficits... I
guess
> there's enough of the design that's like any plant installation /
mechanical
> design (interior structures, plumbing, machinery) that IV would be a
valuable
> part of the effort and it's possibly an improvement over what they were
using
> (drafting boards and lofting floor?) if it's the primary design
environment.
> It would be interesting to get some follow up on stuff like this. Seems
like
> we always get these news flashes (in the pan?) and never hear any more
about
> it.
>
> > ...having worked at Todd Shipyards for a short while when I was a
kid....
>
> Always thought it would be fascinating to visit a ship yard and watch the
> construction.
>
> I don't know the first thing about it, but I believe Kent was correct, in
a
> sense. I think that large hulls are designed so they can be (primarily?)
> constructed from "flat wrap" panels (correct me if you know better) vs.
panels
> with compound curves. Rhino and, I suppose, (m)any of the specialized
hull
> design software packages have loft functions that will aid in the creation
of
> the surfaces where that is the desired result (Rhino calls them
"developable"
> surfaces and flat patterns can be generated from them). How it would be
done
> if you are lofting manually... I have no idea, but I guess people have
been
> doing it for hundreds of years. It's always so humbling to consider
things
> that have been done for eons that I haven't the slightest comprehension
of.
> Where's the phrase "I am only an egg." from? 8~)
>
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