What to check on this kind of supporting

[victorpbr]

Hi,

I have a horizontal vessel (ASME VIII div 1) that needs to be supported by two points on its cross section, as shown in the attached figure. Its a problem of two localized inward radial loads being applied to a cylinder, I'm not familiar with the WRCs procedures so I do not know if that is the case.

Can anyone point me the section of the code,any methods or the stresses I should analyze?

There is also a stiffening ring inside the vessel acting as a stiffner on this section.

 

[SnTMan]

victorpbr, WRC 107 method could be used for an unstiffened shell, but will not account for the ring. You would need to follow the sign convention for your software, as I recall per WRC 107 positive radial loads are directed inward.

Perhaps Roark has a couple of cases (cylinder, ring) you could superposition.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[victorpbr]

Hi Mike,

I took a look on WRC 107, the "problem" is not accounting for the stiffening ring. But thank you for your input, I will look into your superposition suggestion.

Anyone knows if I can do a FEA analysis per Part 5 on div 2 on this?

 

[SnTMan]

Well, of course you can.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[victorpbr]

I did not expressed myself clearly,

I was in doubt about how to factor the loads to do an elastic-plastic analysis, but since these are support points I guess I can just constrain the displacement on those points and run a analysis, should do it. But if I didn`t know the displacements, how would I factor these external applied loads?

 

[TGS4]

Factor the weight of the vessel. Restrain per normal. I'm confused why this is confusing.

 

[victorpbr]

For the example posted it is clear for me now TGS4. My doubt was for external applied forces such as those analyzed by WRC107 but when we have a stiffening ring if are rules provided for that on part 5

 

[r6155]

See design procedure in:

1) AD 2000 MERKBLATTER S 3/2
2) BS PD 5500-2015 Annex G fig G3.3-1 c) typical support for horizontal vessel with leg supports, page 596/1004 in pdf.
Also example calculation in Annex W page 755/1004 in pdf

Regards
r6155

 

[TGS4]

If you have a stiffening ring, just include it in your model. Otherwise, there is nothing special to do.