[PSUBS-MAILIST] K3000 spherical shell calculations

[Personal Submersibles General Discussion]

Hi Les,
I've been using this free design software for years. It doesn't do everything but
is good for rough calculation on basic shapes like cylinders, hemispheres, tubes. 
It will show you the weight of your material, the displacement & crush depth.
Alan
Under Pressure Design Software | Deep Sea Power & Light

 
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________________________________
 From: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Wednesday, April 16, 2014 5:25 PM
Subject: Re: [PSUBS-MAILIST] K3000 spherical shell calculations
 


 
Hello everybody ,anybody, Les here , 
Attatched myself to this email for convenience 
(similar subject) been away from psubs for quite some time wanting to start 
again.
Now it might sound dumb, but I tried to follow the 
calc sheet for material and depth etc with ring stiffeners but ufortunately 
had a few problems, perhaps a sample calc attached to it would assist me and 
maybe others on how to use it correctly? 
In between time I do need to get a rough indication 
of the thickness of steel  and  approx size 
of  ring stiffener size and quantity, to roughly calculate 
the weight of what I wish to build, to see if what I want to do is 
feasible or not...WEIGHT IS CRITICAL for my project 
Can anyone help me please my reqirements are; 
A Sphere 2 meters diameter
A Cylinder attached to that 1.2m diameter x 4meters 
long
 ( I understand there will be a flaring 
attatchment to the sphere, however at this point for the exercise, just to calc 
the min weight that would be possible on these two items would be an indicator 
for me andd give me a mental appreciation of my limitations )
The desired depth is 300m, ( 984ft ) 
( 452 psi ) or I could settle for 250 meters( 820ft ) ( 379 psi ) both 
maximum dive depth not crush depth.
Sorry to be  pain but can any-one help me 
Thank you 
Les
 
P.S. In for a penny in for a pound, guess I will 
make myself look completely dumb ....just as an indication, with 
something like the above how would I calculate the  
        volume 
hence the size required for soft tanks for maximum submergance 
 
 
 
 
----- Original Message ----- 
From: swaters at waters-ks.com 
>To: Personal Submersibles General  Discussion 
>Sent: Tuesday, April 15, 2014 4:39  AM
>Subject: Re: [PSUBS-MAILIST] K3000  spherical shell calculations
>
>Sean,
>I don't believe I know the geometry. I guess in short term, I am looking  for the pros and cons on a deep submarine for cylinder with ribs  compared to a sphere. 
> 
>Thanks,
>Scott Waters 
> 
>-------- Original Message --------
>>Subject: Re: 
    [PSUBS-MAILIST] K3000 spherical shell calculations
>>From: "Sean T. 
    Stevenson" <cast55 at telus.net>
>>Date: Mon, April 
    14, 2014 11:24 am
>>To: Personal Submersibles General Discussion
>><personal_submersibles at psubs.org>
>>
>>
>>At present, it will calculate stiffened cylindrical hulls in  the forward direction only. The optimization routine is not properly  constrained yet. If you already know the geometry you want to use, no  problem.
>>Sean
>>
>>________________________________
>> _______________________________________________
>>Personal_Submersibles 
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>>Personal_Submersibles at psubs.org
>>http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> 
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