Mass unbalance commonly causes vibration of rotor-bearing systems. Lumped mass modeling of unbalance was adapted in most previous research. The lumped unbalance assumption is adequate for thin disks or impellers, but not for thick disks or shafts. Lee et al. (Lee, A. C., et al., 1993, “The Analysis of Linear Rotor-Bearing Systems: A General Transfer Matrix Method,” ASME J. Vib. Acoust., 115, pp. 490–497) proposed that the unbalance of shafts should be continuously distributed. Balancing methods based on discrete unbalance models may not be very appropriate for rotors with distributed unbalance. A better alternative is to identify the distributed unbalance of shafts before balancing. In this study, the eccentricity distribution of the shaft is assumed in piecewise polynomials. A finite element model for the distributed unbalance is provided. Singular value decomposition is used to identify the eccentricity curves of the rotor. Numerical validation of this method is presented and examples are given to show the effectiveness of the identification method.
Estimation of Distributed Unbalance of Rotors
Contributed by the International Gas Turbine Institute (IGTI) of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Paper presented at the International Gas Turbine and Aeroengine Congress and Exhibition, New Orleans, LA, June 4–7 2001; Paper 01-GT-245. Manuscript received by IGTI, Dec. 2000, final revision, March 2001. Associate Editor: R. Natole.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
Yang , T., and Lin, C. (September 24, 2002). "Estimation of Distributed Unbalance of Rotors ." ASME. J. Eng. Gas Turbines Power. October 2002; 124(4): 976–983. https://doi.org/10.1115/1.1479336
Download citation file:
- Ris (Zotero)
- Reference Manager