Peak G level achived during Random Vibe test.

[rlara]

Hellow everyone:

I am trying to determine the peak G level achived during a random vibe test at the main natural frequency. Im using miles equation to estimate the peak acceleration.

I ran a low level random vibe test to determine the natural frequencies of the unit and also the Q's. I had to notch the peak acceleration to 100 G, so what I did was to determine the max PSD level I should limit notch as to achive the 100 G peak.

What I want to determine is the peak acceleraction the unit saw at full level. Should I used the orinal Q I got from the low level run and the peak output PSD? or should I use the Q that I saw at the full level run and the peak output PSD?

thanks in advance

rlara