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Re: [PSUBS-MAILIST] endcap/bulkhead question
Any additional stress (I'm not sure if there is any), could easy
taken care of by a heavy frame stiffener/re-enforcing ring.
As for the displacement, it reduces displacement meaning that not
only have you eliminated most of the risk of end cap buckling, but
your sub is now lighter. And for useful space inside the sub, that
is going to depend on how clever you get packing things in.
For people wanting to read more about inverting end-caps on submarines,
I would recomend reading "Pressure Vessels, External Pressure
Technology" by Carl T.F. Ross - Chapter 7 "Novel Pressure Hull Design"
(page 280).
Ian.
On Tue, 16 Dec 2003 09:15:36 -0800 (PST)
Warren Greenway <opensourcesub@yahoo.com> wrote:
> The junction between the caps and hull "tube" will be
> under tremendous stress. There will be shearing forces
> on the wleds. Also, you are creating less useable
> interior space for a given displacement. I think those
> would be some of the basic reasons. Reference Concepts
> of Submarine Design for more specifics.
>
> Warren.
>
> --- Emile <2stroke@hetnet.nl> wrote:
> > Hello all,
> >
> > For my future psub I consider an inverted endcap or
> > bulkhead
> > See the "drawing"of the pressure part.
> > ______
> > )_____(
> >
> > At this configuration the sphere shelfs only have a
> > tension loading what is preferrable.
> > I lookt at almost every psub design on the site but
> > no other sub has this configuration, exept for the
> > Spurdog.
> > Am I wrong in my toughts and are there high stresses
> > in the sharp transition from the sphere shelf to the
> > circular hull??
> >
> > hope someboy knows,
> >
> > Emile D.L. van Essen
> > www.AiResearch.nl
>
>
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