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Re: [PSUBS-MAILIST] Pressure simulation
No - I didn't make them. Andre a crewmember of the
Euronaut Projekt make them - as any FE calculation/simulation
in the subs pressure hull. It takes us many nights over weeks
to make all this calculations - and change the drawings
- but at the end it increase with the bucks of just
some hundred euros the dive deep about 50 meter (150 feet).
One result of the FE calculation was that the diverchamber
in front of the machinery space on one side of the sub creates
to much stress to the hull - so the chamber moves just some
weeks before I order the main steel parts. And yes - I make a
new weight calculation before we did that..
best regards Carsten
Pierre Poulin schrieb:
>
> Carsten,
>
> Did you made those simulations yourself? If yes, what program do you use?
>
> Thanks!
>
> Pierre Poulin
>
> >From: MerlinSub@t-online.de (Carsten Standfuss)
> >Reply-To: personal_submersibles@psubs.org
> >To: personal_submersibles@psubs.org
> >Subject: Re: [PSUBS-MAILIST] OSS Endcaps (Pressure hull)
> >Date: Sat, 15 Feb 2003 13:51:02 +0100
> >
> >Hi Phil,
> >
> >I put two FE pictures to
> >
> >http://www.prismnet.com/~moki/subfiles
> >
> >showning a "Klöpperenboden" under outside pressure.
> >This kind of Tank-endcap is the standard in europe
> >- but is clear not real elliptical.
> >
> >For this kind of Endcap the formulation
> >"need to be thicker than the cylinderical hull between them"
> >is right. Should have about 10-15 % more tickness than the
> >cylinder.
> >
> >Much better solution is that - turn the endcaps 180°..
> >like )=(
> >
> >Tadploe has the hardtank is the center of both
> >endcaps as pillar pipe - a very nice solution.
> >
> >best regards, Carsten
> >
> >Phil Nuytten schrieb:
> > >
> > > Re: Elliptical hull shape:
> > > Alec - the other elliptical hulled sub you were trying to think
> >of
> > > is probably the 'Markasub' - actually, there have been a handful of
> >hulls
> > > in this form, over the past few decades. It is not a particularly
> >efficient
> > > shape re: weight/depth etc. The ellipse is not too terrible, but the
> > > cylindrical transition is a killer. Ellipses (ellipsii ?) are not
> >designed
> > > to be butt-welded. An ellipse without the cylindrical transition ( the
> >soft
> > > 'corner') is a semi-sphere. They become more efficient as they become
> > > deeper (obviously . . . sorry to go kindergarten for those who know this
> > > stuff) in curvature for a given diameter. Full efficiency is reached
> >when
> > > the depth of curvature is half the diameter - a hemisphere - and
> >receedes
> > > again as you pass this number - half an egg.
> > > I noted in a previous post that some-one said something to the
> > > effect that the 'end-caps' need to be thicker than the cylinderical hull
> > > between them. If the 'end-caps' are hemis, the exact opposite is true -
> >and
> > > if they are ellipsii ( I kinda like that word!) they are still likely to
> >be
> > > thinner than the tubular hull for a given depth.
> > > My point?? Hmmmm . . .perhaps I don't have one.
> > > Phil Nuytten
>
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