I’m now using this geometry which is closer to fullfill all the assumptions, at least in terms of Numerical values. There are still some uncertainties in the BC considered in the formula.
With those values , the quantities I can extract more clearly are Sigmav0 and Hoop Stress . They both agree very.
My BC are
Y on the base, Symmetry on the sides and pressure on a thin line on top. Reactions are fine. I’m using full 5 waves so BC are far from the center section which is the one used for inspection.
I don’t think you can do that on Prepomax. Only Mecway can constrain rotations aligned with the shell plane of a curved shell.