Vibration velocity, amplitude, vibration acceleration
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How can we understand vibration speed, amplitude, and vibration acceleration? Can it be explained in simpler terms? It seems a bit difficult to understand when trying to look it up on Baidu by myself
For the three evaluation indicators of vibration, it is determined based on the purpose of the measurement which indicator’s data should be used for evaluation. Depending on the sensitivity of the three indicators such as the device’s mechanism and rotational speed, there are specified range of criteria for evaluating vibration velocity and amplitude, as I am aware.
Depending on the operating condition of the equipment, the sensitivity and relevance of these three numerical indicators vary. Two books are recommended: Signal Monitoring and Diagnosis and Equipment Fault Diagnosis: lol
These three measurement values on the vibration meter
Displacement is applicable to low-frequency vibrations, in the range below 10Hz; velocity is suitable for medium-frequency vibrations, in the range of 10Hz to 1KHz; acceleration is appropriate for high-frequency vibrations, above 1KHz. The selection of diagnostic parameters should primarily depend on the monitoring purpose: the peak value (or peak-to-peak value) of displacement is used to assess the positional accuracy of components or damage caused by deformation, as the peak value reflects the extreme limits of displacement changes, which is essentially related to fatigue strength. Acceleration is used to take into account the effects of inertial forces, since acceleration is proportional to inertial forces. The root mean square value of vibration velocity is used to determine fatigue failure of components, as the fatigue life depends mainly on the deformation energy of the components and the cycle rate of the loads, and the root mean square value accurately reflects these factors; it is essentially related to the effects of impact pulses and resonance