I hope you will find some time to have a look and tell me what I'm doing wrong. Than I tested the solid tank (BLODGETT - SOLID TANK.ipt) and the deflection is 1.175"Īnother test the shell tank (BLODGETT - SHELL TANK.ipt) - the deflection is 1.14"Īll the 3 files are attached. I tried with the constraint at the edges - case AE2 - and the deflection is 1.94", which is bigger than the previous but still lower than the 4.4" of the shell. I tried with the constraints at the thickness faces (it looks more logic to me) - case AE1 - and the deflection is 1.011". So I tried the same wall as solid (BLODGETT - SOLID WALL ONLY.ipt). (Please let me know if you think this is not a good idea). I would be more comfortable with a solid model because usually the tank I would need to analyze will be more complex - with lots of stiffeners - so it would be easier if I could import in Nastran as modeled in Inventor. I tried to replicate your "shell wall only" and got the same deflection and that 4.4" is in line with the book results. I am looking just at Blodgett exercise now.
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