As well as bearing instability and steam whirl a further cause of self-excitation is internal damping of the shaft material or due to micro-movement at shrink fits or couplings. The first was reported by Newkirk and Kimball in 1925 [14, 15, 16]. The mechanism is very complex but can be understood by the assumption of a viscous law. This will be considered in the next section.


Mode Shape Planet Gear Assembly Component Jeffcott Rotor Vibratory Velocity 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1993

Authors and Affiliations

  • Erwin Krämer
    • 1
  1. 1.Darmstadt-EberstadtGermany

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