Hello everyone,

I need help in frequency / vibration analysis 

how do you make a preloaded spring and how can I simulate a vibrating stage.

I need to have springs holding the stage to a carrier (they should be in tension before i start the vibrating simulation)

I need to know ho do that as well as how to insert the vibrating source using SolidWorks Simulation 

I need to study the frequency response (displacement etc)

Attached is a pic of the design I need