ANALYTICAL & EXPERIMENTAL INVESTIGATION OF EFFECT OF MATERIAL & GEOMETRY OF SHAFT

Mechanical Engineering

In Fault detection of bearing, detection of misalignment and condition monitoring of bearing or gearing system, the system has to rotate at different speeds. If specific rpm matches with critical speed which is nearer to first bending natural frequency of shaft will generate excessive vibrations due to resonance. If the objective of whole analysis is to identify the fault with the help of vibration spectrum, excessive vibrations may dominate the spectrum which may be useful for fault detection. Hence it is necessary to avoid critical speeds, or detect the change in spectrum due to critical speed. In this paper the work will be focused on estimation of bending natural frequencies which is nearer to critical speeds of shaft and mode shapes by using FEM software and experimental verification of the same.

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