Can Simulate handle Non-Linear springs with non-mirrored tension and compression...

[jellis-2]

I am looking at running some random vibration analyses with wire rope isolators and I am curious to Simulates capabilities in handling the non-linear linear springs that have different force-deflection curves in tension and compression. The attached image is representative of the type of spring I would like to idealize. Can simulate handle this type of spring? Can I set it up with a table where tension is negative deflection or something along those lines? 

Thanks for your help!

Typical Wire Rope Isolator Load vs. Deflection

[SweetPeasHub]

sorry for random the model must be linear. is your model simple enough for MDO (mechanism dynamics option) analysis?

[jellis-2]

I didn't think about dynamic analysis not working with non-linear springs, it wont even work a modal.

The model is very simple. I just need to set a couple idealized springs up to a mass of a certain volume so I can get a response and provide peak and RMS loads in a few different directions to my structures team. While I have done some simple kinematic analyses in MDO adding random vibration and nonlinear springs in it would be uncharted territory for me. Does MDO have the capability to to this? 

[gfraulini]

In my opinion you do this kind of analysis better in MathCad.
Is the system 1 dof?