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Frame Element with both ends fixed


why I cannot solve a beam with both ends fixed?

Ability to solve models with no free DoF.


mostafanouh wrote May 12, 2016 at 8:57 PM

Of course you can, but try to use different type of solver (e.g. ConjugateGradient) because Cholesky solver is limited to positive definite matrices(all diagonal elements are positive) and the fixed-fixed frame element will result in nonpositive definite stiffness matrix

mostafanouh wrote May 19, 2016 at 3:33 AM

I'm sorry, my comment is wrong.
btw, I can't delete it.

epsi1on wrote May 25, 2016 at 4:06 AM

No problem.
Problem is because stiffness matrix turns 0x0 and code does throws exception for that when trying to multiply 0xn matrix with nxm matrix.
this is still in queue

epsi1on wrote May 25, 2016 at 10:26 AM

anyways ConjugateGradient seems to work fine, as @mostafanouh said.