MODEL CALIBRATION OF ANISOTROPIC ROTORDYNAMIC SYSTEMS WITH SPEED DEPENDENT PARAMETERS

摘要

In this paper, a method for calibrating rotordynamic models of speed dependent systems supported on anisotropic supports is presented. The method is based on the comparison between the calculated eigenvalues and the ones extracted from the synchronous frequency response functions. An eigensensitivity analysis is conducted to calculate the sensitivity of the computed eigenvalues to the selected elements to be updated. This method is suitable for field application since it requires simple coast down tests. The method is illustrated on a test rig with fluid film bearings, and is shown to be effective in the calibration of rotordynamic models at the speeds of the modes excited within the operating speed range.