Abstract
The transverse vibration characteristics of rigid rotor-bearing system was studied with the gyroscopic effect taken into consideration which was arosed by unsymmetrical bearings. And its transverse vibration equation considering the gyroscopic moment and fluid force was established. The stability condition for the system's vibration and critical stability rotational speed's concrete expressions were deduced. Then for different structural parameters, the system's vibration characteristics were discussed. The simulation indicates that when the rotor is considered as a rigid cylinder and its ratio of slenderness is 1.5, the transverse free vibration under gyroscopic effect always is stability. The result could give technical support to the structural design and optimization of rotoring machine and is useful for controlling rotors' vibration and reducing structural noise.
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