Sorry guys, wrong information has been provided even after multiple times of checking.
Have you confirmed the correct deflection using hand calculations? Roark's is a good source for deflection and stress in a disk which is restrained by the edges. Seems like you'd end up with quite a bit of membrane stress but still you'd have some deflection. I would expect to see a 14 foot diameter disk that is about 1/4" thick to deflect quite a bit even with minimal pressure, add gravity and it would be worse.
Thanks for your reply, Jim.
I just came back from a meeting on this tank. I have been given the wrong information. The tank is actually sitting on a plinth with the floor toughing the ground, which makes sense.
Really, this shouldn't happen. I have asked responsive people to check several times.
Thomas Bayley wrote: Thanks for your reply, Jim.I just came back from a meeting on this tank. I have been given the wrong information. The tank is actually sitting on a plinth with the floor toughing the ground, which makes sense.Really, this shouldn't happen. I have asked responsive people to check several times.
Thomas Bayley wrote:
Ah, yes, always reconfirm the boundary conditions. I wondered how it would hold up. However, for that thin a material and the size of this tank you will likely see quite a bit of deflection along the upright sides as well. Don't forget gravity with this one since the mass of the tank wall is significant. It would still be wise to do a sanity-check hand calculation to see whether or not a linear FEA will be valid.
You are right, Jim.
I have checked multiple times with the engineer on the other side, every time I've been told it is correct until that meeting.
I used to do some FEA on structures with ANSYS but not Solidworks and not on tanks. It seems like Solidworks works quite differently in terms of geometry simplification, constraining and meshing comparing to ANSYS. This is the reason why I raised up concerns. I thought I might have done something wrong. But obviously not.
Anyway, thanks a lot for your reply.
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