Plane frame, linear static analysis

[Luciano Jacinto]

Dear colleagues:

I’m experiencing some trouble with the structure defined in the attached Python file. This is a very simple structure: one beam supported on a column and in both ends. There is a single load case with 2 loads in it: distributed plus concentrated (correctly displayed by the GUI).

The solver reports the following ERROR: Likely lability detected at node 4 – dof x.

When I remove the distributed load (commenting the corresponding code lines), the solver runs successfully the model subjected to the concentrated load. What is wrong with this model?

Grateful in advance for the help.
P.S. NextFEM version I’m using: 2.2.0.5

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[NextFEM Admin]

Hello,
please update your version to 2.2.1.0 from now on.

[Luciano Jacinto]

Thanks. This time the solver ran the model without problems and the results were as expected.

[Author]

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