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A machine is mounted on an elastic support with negligible damping. The machine has an unbalanced rotor. It was noticed that the maximum amplitude of
A machine is mounted on an elastic support with negligible damping. The machine has an
unbalanced rotor. It was noticed that the maximum amplitude of vertical vibration occurs
when the unbalanced rotor is rotating at In order to determine the mass of the
machine and the stiffness of the support, a springmass system, of mass tuned to
cpm was attached to the machine to act as a tuned vibration absorber With this arrangement,
resonance occurred at rotor speeds and and the steady state amplitude
of the absorber mass was when the rotor was rotating at Determine the mass
of the machine and the stiffness of the support.
A vibration absorber tuned to is to be used to provide a speed range
between the resonance speeds. Determine:
a The mass and stiffness of this absorber
b The amplitude of the mass of this absorber during its steady state operation, when the
unbalanced rotor is rotating at
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