Comments (4)
A singular stiffness matrix means the structure is unstable. In your case, the model has no support in the Z direction. Read the link below for more clarification.
Pynite Documentation: Stability
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Also - FEA always requires beam stiffness properties. For textbook problems with no properties, you can simply make them up. Your deflections will be the only thing affected, but textbook problems like that don't deal with deflection.
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The model is 3D, so it needs to be stable in 3D, even though your problem is only dealing with loads in 2D.
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Thank you so much, it is working :)
But it is stable (at university we call it above stable) , the indeterminate degree was 1 (7 - 6) and after adding 2 supports in Z direction it would be become 3 (9 - 6), i know that i can solve it, because i am solving 2D problem in 3D probem but why i should add that three support?
I am sorry for my question, it seems that i should learn more about 3D analysis and FEM
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Related Issues (20)
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