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modal analysis of a structure with nonlinear behavior

modal analysis of a structure with nonlinear behavior

modal analysis of a structure with nonlinear behavior

(OP)
Hi!
I need to make an modal analysis of a bridge with cables. The cables have nonlinear geometry behavior, so I have to turn on non linearity.
To make a modal analysis i read that i need to activate prestress effects calculation. But when i do it, it says that i cant do a modal analysis with nonlinear geometric on.
I read too, in the Ansys help, that I need to use PSOLVE, instead of SOLVE, but i dont have PSOLVE because im using the PROFISSIONAL version.

well... help!! and thanks.
 

RE: modal analysis of a structure with nonlinear behavior

In ANSYS the modal analysis is treated as a linear analysis only.  You can still have a non-linearity in your model (i.e. compression only contacts).  But when you run the modal analysis the non- linearity will be ignored. (i.e. compression only contacts will be treated as bonded).  

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