Influence of Parameter Changes to Stability Behavior of Rotors,
KAISERSLAUTERN UNIV (GERMANY F R) DEPT OF MECHANICAL ENGINEERING
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The occurrence of unstable vibrations in rotating machinery requires corrective measures for improvements of the stability behavior. Before a measure will be realized, different possibilities should be investigated. In this paper a simple approximate method is represented, to find out the influence of parameter changes to the stability behavior. The method is based on an expansion of the eigenvalues in terms of system parameters. Influence coefficients show in a very intuitive way the effect of structural modifications. The method first of all was applicated to simple nonconservative rotor models. Furthermore it was approved for an unsymmetric rotor of a test rig.