Hello Sahil,

Thank you for the reply. Thing is i am using spring (with damping) in three direction to represent the damper. I also have structure damping of 0.02. I am using mode super position method to performe the harmonic analysis. 

I have some question regards to that.

  1. which damping will be taken in to account in harmonic analysis ? (damping from spring or over all damping coeff.)
  2. do i need to use full analysis instead of mode super position ?
  3. which solver gives the better result for modal analysis ? full damped or reduced damp ?

Thank you in advance !!