[PSUBS-MAILIST] 1-ATM design

[Alec Smyth via Personal_Submersibles]

Basically the idea was to make each column a successive iteration of
design. What you do is for example copy all the values in column C into D
and start changing them there. I agree with you a metric version would be
nice, but it's just this way because the starting point was a book in
imperial and initially this was just something I did for my own use so
local by definition.

On Sat, Aug 20, 2016 at 8:05 AM, Petar Topljak via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi Alec,
>
> As I understanded that, the D cell is there for another section of
> different diametre, my design has only one D0 - 1800 mm .
> I also have issues with ABS rules as they are made according to imperial
> system, It would be desirable to have the calculations in my assignment in
> metric system.
>
> Thank You for quick response; Petar
>
> 2016-08-20 13:56 GMT+02:00 Alec Smyth via Personal_Submersibles <
> personal_submersibles at psubs.org>:
>
>> Hi Peter,
>>
>> Welcome, and I wish I'd had that assignment in college! The blue cells
>> are calculated, but for that to happen you need to populate the white ones.
>> For example on your first screen shot, the material properties in column D
>> have not been entered.
>>
>>
>> Best,
>>
>> Alec
>>
>> On Sat, Aug 20, 2016 at 6:16 AM, Petar Topljak via Personal_Submersibles
>> <personal_submersibles at psubs.org> wrote:
>>
>>> Hi everyone,
>>>
>>> My name is Petar and I am coming from Rijeka, Croatia.  I am designing
>>> 1-ATM one man submersible as a project for one of my subjects at my
>>> university.
>>>
>>> The idea is to design a pressure hull that can safely whitstand pressure
>>> at 150 meters. Procedure is to design submersible according to ABS (or ASME
>>> or any else classification company) rules, create model using 3d modelling
>>> software and do a finite element analysis of the model.
>>>
>>> The problems I ran into are in using the spreadsheet, as there are some
>>> parameters that are not defined in the ABS rules, or I am not able to find
>>> them or understand them due to my english skills, + we use metric system,
>>> so changing creates additional problems.
>>>
>>>
>>> I understand the classic questions asked about the lobes and
>>> coefficients (eta), but i had issues with Tw, Lw Lf and tf parametres -
>>> "mail3 stiffener.png" am I doing it right ?
>>>
>>> I am also sending you screenshots of my sheet, so you can check it if
>>> you like and alert me for any possible mistakes.
>>>
>>> Thank You in advance, Petar
>>>
>>> _______________________________________________
>>> Personal_Submersibles mailing list
>>> Personal_Submersibles at psubs.org
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>
>>>
>>
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>
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