Sphere Design

[sameercnn]

dear Elites,

Can any body upload Sphere design or its development. it will be great help for me.

thanking you,

br,
Sameer

[FATHI]

It is commonly with ASME VIII div.1 , or 2 ..they are specific formulas for sphere and spherical heads.
The proble for me was how to bring the support reactions ? and how to reckon with seismic, wind..
These legs are always braced.

Acually what is needed is a typical example or a flow short detaling the steps..

[maeng]

For the sphere tank, support reaction due to wind, seismic is a very simple calculation.
Please see the Pressure Vessel Design Manual, Third Edition (Dennis R. Moss), Procedure 3-5.
And, for your information, reaction to the support is came from the Wind force or seismic force.
If you can finding the wind force or seismic force, it is very easy solve for your problem.

[FATHI]

maeng , thank you for your answer

I was actually looking for examples ,Litteratures or worked examples of =
Reactions from the supports ONTO the spherical shell

This should be , I guess something like WRC 107 or similar, but with = - NON radial nozzles
The point is that WRC is limited to some ratios and interpolation out of its scope is risky

But support reaction combined with pressure and own weight

Probably others tools are also OK , someting like FEPIPE ? or other FE software
The issue is then how to classifiy the stresses as per ASME VIII div 2 or PD5500,..

The PD5500 for instance has sketches with formula explaining how to combine P , W , and M , but cylindrical , conical and spherical shells
without taking support reactions into account ???

anyhow thanks to all

[maeng]

Mr.FATHI,

yes right, Actually, reaction from the support on to the spherical shell can be proove using the WRC107.
But, If application code of Spherical tank have a ASME DIV.2, then you can using the F.E.A or WRC297 for this solution.
I don't know about PD5500. but, if you want formula that how to input to the WRC107, i can send to you by e-mail^^
For your reference, my e-mail address is a chmaeng@twre.co.th ^^