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Excessive Rotz at node, why?

Excessive Rotz at node, why?

Excessive Rotz at node, why?

(OP)
hi,

I am conducting a non-linear analysis of a 3 bay frame with an initial sway, which is modeled as perfectly plastic perfectly elastic. the aim is to find the maximum carrying capacity of the frame.

when i run the analysis the error comes up saying that there rotz at node 76 has exceeded the limit. i don't understand why this is happening.

and also if any one could help me with the script in have attached. up until ansys reaches a load factor of (0.55)1.1 the deflections are similar to the literature results, but at this point the solution is no longer solved. i know the results should go up to 0.9 (1.8) with a deflection of 45 mm. if anyone could please help me solve the unknown issue with the script so i can get these results it would be much appreciated.

i think it may be the coupling of the nodes at the extreme corners, but this is what the example in the literature requires.

thank you

RE: Excessive Rotz at node, why?

Are the literature results from an analytic solution or are you comparing to another finite element solution?

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