If we are talking about forced harmonic viberation like the unbalance in rotating macinery then factors are:<br>1-Frequency<br>2-Amplitude<br>3-Natural frequency<br>4-Damping factor<br>5-Harmonic excitation force<br><br>I hope the above helpful,<br><br>BYYYY
Main three parameters of Vibration:
1. Amplitude (Displacement, Velocity or Acceleration)
2. Frequency (Hz or CPM)
3. Phase
There are many good books available on Vibration Analysis. Recommendations include:
"Vibration Primer" by Charles Jackson
"Vibration Spectrum Analysis : A Practical Approach" by Steve Goldman
" Machinery Malfunction Diagnosis and Correction: Vibration Analysis and Troubleshooting for Process Industries" by Bob Eisenmann Sr and Jr.