Why rotating machines are not allowed to run near critical
speed region?
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Answer Posted / iamdon
The rotor is a structure having mass and elasticity.So it
will vibrate with a natural fcrequency which is balanced by
elastic force.The mass centre has an inherent eccentricity
from the centre of rotation.
The deflection tend to be very large near or at critical
speed and gives rise to considerable vibrations.This may
break the shaft.That is why rotating machines are not
allowed to run near or at critical speed.
Author:arbelectbit@yahoo.com
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