engleski

Computational Stability Analysis of Laval Rotor in Journal Bearings

The stable behavior of rotor depends in complex manner on the bearing parameters and distribution of damping, as well as on the rotor mass and stiffness and operating speed. In this paper Crandall's bearing force-velocity model is applied to stability analysis of Laval rotor in cylindrical fluid film bearings. In some circumstances, the fluid film reactions on the rotating journals can destabilize the simple rotation mode and excite whirling modes. A domain of rotor speed and transverse bearing loads, which provides stable support and introduces heavy damping of rotor vibration, is obtained by standard computational routines. As a result of this analysis, the stability boundary is determinated for different values of rotor damping parameters.

Laval rotor; journal bearings; linear force-velocity model; stability

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