Which measurement indicates fatigue experienced by the shaft and bearing?

Velocity is an important measurement in vibration analysis as it provides insight into the energy associated with the vibrations occurring within a system. When it comes to assessing fatigue in shafts and bearings, the velocity measurement can help identify changes in operation that may indicate developing problems.

As machinery operates, components such as shafts and bearings undergo stresses that can lead to fatigue over time. An increase in vibration velocity is often associated with such wear or failure modes, as it reflects the amplitude of the oscillations involved. Engineers and technicians use this measurement to monitor machine health—if the velocity exceeds a certain threshold, it can be a warning sign of potential fatigue failure.

In comparison, other measurements like displacement can indicate the level of movement from a rest position, acceleration measures how quickly an object is speeding up or slowing down, and jerk—while it relates to changes in acceleration—does not directly correlate with the fatigue experienced by mechanical components. Velocity provides a more straightforward correlation to the conditions that can lead to fatigue, making it the most relevant indication in this context.