Abstract
The predictive accuracy for the dynamic behaviour of a rotor under conditions of high-speed spinning depends on the accuracy for the analytical model of the rotor, the dynamic characteristics of the bearings and the seals, and the external force. In the present study, we propose a method to identify all characteristic matrices in the vibration equation of a rotor based on the information on rigid and elastic properties which can be obtained by a vibration test without spinning. The rotor is assumed to be composed of a shaft which can be modeled as beam elements and rigid discs. The proposed method can be applied for model reduction in which the reduced number of beam elements is feasible to calculate the dynamic behaviour of the rotor.
