Supression of Rotor Instability

  • N. F. Rieger
Part of the International Centre for Mechanical Sciences book series (CISM, volume 273)


The following principles are effective for increasing the stable operating speed range of a rotor:
  1. a.

    raise the lowest, critical speed of the system

  2. b.

    increase the external system damping

The first requirement can be achieved by increasing the bearing radial stiffness or the bending stiffness of the rotor, or both. The second requirement can be met by using a bearing or support type which inherently contains more non-rotating velocity damping. It should be noted that the increase of any damping which rotates with the shaft itself has a stabilizing effect below the bending critical speed, and a destabilizing effect above the bending critical speed.


Critical Speed Journal Bearing Thrust Bearing Rotor Instability Squeeze Film 
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Copyright information

© Springer-Verlag Wien 1984

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  • N. F. Rieger

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