Experimental observations on rotor-to-stator contact. (28th April 2019)

• Record Type: Journal Article
• Authors: Ehehalt, Ulrich; Alber, Oliver; Markert, Richard; Wegener, Georg
• Is Part Of: Journal of sound and vibration. Volume 446(2019)
• Page Start: 453
• Page End: 467
• Publication Date: 2019-04-28
• Subjects: Rubbing -- Contact -- Rotor -- Test rig -- Vibration pattern -- Experiment -- Multi-frequency motion; Sound -- Periodicals; Vibration -- Periodicals; Son -- Périodiques; Vibration -- Périodiques; Sound; Vibration; Periodicals; Electronic journals; 620.205
• DOI: 10.1016/j.jsv.2019.01.008
• Languages: English
• ISSNs: 0022-460X

Abstract

Abstract: If a flexible rotor contacts its stator, the nonlinearities induced by contact may result in a great variety of vibration phenomena. The motion types reported and analyzed in the literature include rotor synchronous motions, forward and backward whirl, sub- and superharmonic motions, motions including sidebands as well as chaotic motions. This article presents an integral experimental approach based on a modular kit for rotordynamic experiments. The experimental results confirm the motion patterns listed above. The underlying fundamental phenomena are analyzed and discussed based on resonance diagrams from run-up and run-down processes, orbit plots and frequency spectra. Emphasis is put on sensitive system parameters and on existence and stability of the various types of motion.