modal analysis of a structure with nonlinear behavior

[crashkeeper]

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.

 

[Transient1]

Your problem is simply you do not have the proper license for the analysis that you need to run. You require the ANSYS structural or mechanical license for your problem.

http://www.ansys.com/assets/brochures/mechanical-capabilities-11.pdf

 

[JonnyK]

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).