Rectangular Tank
Rectangular Tank
(OP)
I am designing a rectangular tank and need to have it comply using Mohr's Stresses formulas. I know of some FEA that could do something but according to ASME appendix 13.
Meygesy' PV handbook has a simplified method
Tanks has to comply to this equation....
S = 0.5 (Sy + Sx) ± [0.25(Sy – Sx)2 + Ss2]0.5
Meygesy' PV handbook has a simplified method
Tanks has to comply to this equation....
S = 0.5 (Sy + Sx) ± [0.25(Sy – Sx)2 + Ss2]0.5
JL





RE: Rectangular Tank
Patricia Lougheed
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RE: Rectangular Tank
JL
RE: Rectangular Tank
if think your equation is "just" the principal stress equation, and if your FEA outputs max (and min) principal stresses that should do it. no?
RE: Rectangular Tank
JL
RE: Rectangular Tank
Mike McCann
MMC Engineering
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RE: Rectangular Tank
thread1452-272642: Rectangular Tank Design
thread794-55086: Rectangular Tank Design
thread404-293556: Dynamics of a tank and
thread794-153709: Rectangular Tank Design.
Patricia Lougheed
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RE: Rectangular Tank
If your are designing circular tanks..it's simple and you have many ways; a rectangular one, very few! Even less using Mohr's circle or the principal stress formulas.
Example S = 0.5 (Sy + Sx) ± [0.25(Sy – Sx)2 + Ss2]0.5
But in a boxed or closed rectangular tanks, where are the "obvious" stress points or area of interest!
JL
RE: Rectangular Tank
RE: Rectangular Tank
JL
RE: Rectangular Tank
htt
RE: Rectangular Tank
JL
RE: Rectangular Tank
My experience has been that, after bidding and designing a series of rectangular and clyndrical(API-650)tanks for a major US chemical company.....
You can be sure to pay about TWICE the cost for a rectangular tank than a circular tank. Stainless and other exotics only increase this ratio.
Furthermore, you have increased the cost of inpection and repair during the life of the tank.
Unless the tank is a special "one-of-a-kind" to perhaps fit into a certain area ( like.....ummmm....say a submarine) there is no reason to go with a rectangular design...... IMHO
Regards
RE: Rectangular Tank
JL
RE: Rectangular Tank
i guessing this isn't something that can be solved from scratch in a forum like this ... we don't know enough details.
roark has some data for rectangular plates. his source is a paper written by Moody. Google (seriously) "Moody Rectangular Plates" (truly, seriously) and you find the paper and a lot more detail than roark has.
RE: Rectangular Tank
the reasons for keeping with a rectangular design are 1st the customer needs the volume, and 2nd other forms are too expensive (to make, to work with, ...).
simple flat sides will produce a heavy design.
RE: Rectangular Tank
JL
RE: Rectangular Tank
RE: Rectangular Tank
JL
RE: Rectangular Tank
reports tend to be as detailed as you make them. i don't think you'll get one to make a report at the press of a button ... if you can post it !. I'd use hand calcs to verify your model.
RE: Rectangular Tank
Cheers,
gr2vessels
RE: Rectangular Tank
I would have liked to compare it to what FEA can produce though.
JL
RE: Rectangular Tank
ZCP
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