The diagnostic method, which utilizes the dFRFs defined in the stationary and rotating coordinate systems, is tested with a laboratory flexible rotor-bearing system, in order to verify its effectiveness in detection of the asymmetry in shaft and the anisotropy in stator. The experimental results indicate that the dFRFs can be effectively used for the diagnosis of anisotropy and/or asymmetry in rotor systems by the investigation of two kinds of dFRF estimates using the complex input and output signals defined in the stationary and rotating coordinate systems.
Issue Section:
Research Papers
1.
Genta
G.
1988
, “Whirling of Unsymmetrical Rotors: A Finite Element Approach Based on Complex Co-ordinates
,” J. of Sound and Vibration
, Vol. 124
, No. 1
, pp. 27
–53
.2.
Inagaki
T.
Kanki
H.
Shiraki
K.
1980
, “Response Analysis of a General Asymmetric Rotor-Bearing System
,” ASME Journal of Mechanical Design
, Vol. 102
pp. 147
–157
.3.
Joh, C. Y., 1993, “Diagnosis of Anisotropy and Asymmetry in Rotating Machinery via Directional Spectral Analysis,” Ph.D. Dissertation, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Taejon, Korea, June.
4.
Joh
Y. D.
Lee
C. W.
1993
, “Excitation Methods and Modal Parameter Identification in Complex Modal Testing for Rotating Machinery
,” Int. J. of Analytical and Experimental Modal Analysis
, Vol. 8
, No. 3
, pp. 179
–203
.5.
Lee
C. W.
1991
, “A Complex Modal Testing Theory for Rotating Machinery
,” Mechanical Systems and Signal Processing
, Vol. 5
, No. 2
, pp. 119
–137
.6.
Lee, C. W., 1993a, “Active Control of Rotors in Complex Space,” Korea-U.S. Vibration Engineering Seminar, Taejon, Korea, pp. 229–242.
7.
Lee, C. W., 1993b, Vibration Analysis of Rotors, Kluwer Academic Publishers.
8.
Lee
C. W.
Joh
Y. D.
1993
, “Theory of Excitation Methods and Estimation of Frequency Response Functions in Complex Modal Testing of Rotating Machinery
,” Mechanical Systems and Signal Processing
, Vol. 7
, No. 1
, pp. 57
–74
.9.
Lee
C. W.
Joh
C. Y.
1994
, “Development of the Use of the Directional Frequency Response Functions for the Diagnosis of Anisotropy and Asymmetry in Rotating Machinery: Theory
,” Mechanical Systems and Signal Processing
, Vol. 8
, No. 6
, pp. 665
–678
.
This content is only available via PDF.
Copyright © 1996
by The American Society of Mechanical Engineers
You do not currently have access to this content.
