The OpenSees Community

Hello I have just installed the Nvidia cusp library in my notebook as i need some increase in my performance in comparison to the CPU opensees solvers, however i am having some trouble in fully utilizing my GPU. In more details through a simple nonlinear bridge example of 300-400 nodes i get the fol...

I am having a 2storey 3d structure which i have to solve with Response Spectrum Analysis , and since Opensees is unable to solve the model with the above method , i was wondering if there is a way to export the stiffness matrix , or the modals of the eigen analysis .
Thank you for your time .