Commonly used terms include:
-
Fundamental Frequency - 1x rpm.
Remember that a belt drive, for instance, has three fundamental
frequencies.
-
Dominant Frequency - Frequency
at which the highest amplitude occurs.
-
Synchronous Vibration - Vibration
harmonically related to a fundamental frequency.
-
Non-synchronous Vibration - Vibration
not
harmonically related to a fundamental frequency.
-
Sub-synchronous Vibration - Vibration
occurring at a frequency
below the fundamental frequency.
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