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Experiment of Oil-Film Whirl in Rotor System and Wavelet Fractal Analyses

[+] Author Affiliations
Qing Kai Han, Hong Liang Yao, Zhi Wei Zhang, Bang Chun Wen

Northeastern University, Shenyang, P. R. China

Paper No. DETC2005-85218, pp. 1149-1154; 6 pages
doi:10.1115/DETC2005-85218
From:
  • ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 6: 5th International Conference on Multibody Systems, Nonlinear Dynamics, and Control, Parts A, B, and C
  • Long Beach, California, USA, September 24–28, 2005
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 0-7918-4743-8 | eISBN: 0-7918-3766-1
  • Copyright © 2005 by ASME

abstract

An oil-film whirl experiment is carried out in a rotor test rig and some nonlinear analyses are achieved in the paper. Firstly, the experiment schemes for measuring oil-whirl of a rotor system are introduced. The shaft vibrations are measured both in stable rotating process and running up and coast down. And then, the detailed signals of level 3, reconstructed by wavelet transform, representing the oil-film whirl motions are analyzed. At last, a wavelet fractal method is proposed, based on wavelet package transform and fractal geometry theory, and the correlative dimensions of signals in every frequency bands are calculated. This method describes the chaotic properties of the oil-film whirl vibration well, and wavelet fractals prove to be more effective than any other nonlinear parameters of the corresponding original shaft vibration signals.

Copyright © 2005 by ASME
Topics: Rotors , Fractals , Wavelets , Whirls

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