SANY,
I am guessing this is an Overhung design fan, direct coupled. Is this correct?
My guess is based on the amplitude increases in the axial direction at 75 and 80 percent, showing in you word document.
When you say "3X DOMINANT PEAK (ONLY 3X)" Does this mean there is NOT a 1x and 2x and 4x and 5x, etc., at all?
What is the axial phase difference between the DE Fan and the NDE Fan.
The axial phase difference between the motor DE and the Fan DE?
What is the displacement values on the 1x and 3x in the DE, NDE and Axial at 75%?
Thanks and Have a Great Day,
Ralph