Reply To: Transient structural (Non-linear) Vs Harmonic analysis (modal based)

[dlooman]

So, you should be comparing results with large deflection off to get an apple to apple comparison.  Gamma = 0.1 is like a log decrement of 0.1.  Damping ratio is about equal to log decrement divided by 2pi.  So in the transient you have more damping.  How different are the two stresses?  What's the maximum harmonic stress?