Journal
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
Volume 34, Issue 6, Pages 777-790Publisher
SHANGHAI UNIV
DOI: 10.1007/s10483-013-1706-9
Keywords
oil-film oscillation; modified proper orthogonal decomposition (POD) method; Chen-Longford (C-L) method; primary resonance
Categories
Funding
- National Natural Science Foundation of China [11072065]
Ask authors/readers for more resources
The oil-film oscillation in a large rotating machinery is a complex high-dimensional nonlinear problem. In this paper, a high pressure rotor of an aero engine with a pair of liquid-film lubricated bearings is modeled as a twenty-two-degree-of-freedom nonlinear system by the Lagrange method. This high-dimensional nonlinear system can be reduced to a two-degree-of-freedom system preserving the oil-film oscillation property by introducing the modified proper orthogonal decomposition (POD) method. The efficiency of the method is shown by numerical simulations for both the original and reduced systems. The Chen-Longford (C-L) method is introduced to get the dynamical behaviors of the reduced system that reflect the natural property of the oil-film oscillation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available