I'm running a random-vibration analysis of a power supply with the following:

Nodes = 37 K, Elements = 17 K, and DOF = 158 K.

The model meshes correctly, but it takes days to solve.  I'm running on a Quad Core with 3 MB of RAM.  Any ideas on how to reduce the solution time?  I've been told that I can't use contact sets when running random vibration.  Could anyone confirm this, and if so, are there work arounds.  The model is a mixture of solids and sheet metal parts.  I've completely simplied the model so there are no small features.

Thanks,

Dave