I also think the issue is the moment of the top flange, since the linear adjustment of sig_y,mean (obtained based on the tensile Reaction Force of the top flange)Â is very close to the analytic solution.
I'm using workbench. My settings are shown in the figure below. I also had a look at the ds.dat workbench created (located in SYS-ii\MECH). Here I can't find "fsum" or "spoint" when I search (strg+F). I thought all commands used for solving/result extracting should be placed in the ds.dat. Strange, isn't it`?
(Comment: The moment is not perfectly alligned in x-direction. However, I don't think that's my issue. On the bottom flange, the total moment reaction is almost coaxial with the x-axis and the reaction moment around x-Axis of the bottom flange is very close to the top flange result)
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