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A model of forced vibrations of a rotor with two axially preloaded angular contact ball bearings and a procedure for studying them have been developed. In the model, vibrations are excited by the joint action of the unbalance and vibration of the supports. Amplitude-frequency characteristics, resonances, the stability and bifurcations of vibrations have been analyzed.
A model and method for investigation of the vibrations of a multi-disk rotor on two nonlinear supports with ball bearings are developed. This model considers the gyroscopic moments acting on disks and elastic properties of the shaft. The vibrations are studied using the Shaw–Pierre nonlinear normal modes. Skeleton curves describing the rotor vibrations are analyzed.
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