Generalized Polynomial Expansion Method for the Dynamic Analysis of Rotor-Bearing Systems

[+] Author and Article Information
T. N. Shiau, J. L. Hwang

Institute of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan

J. Eng. Gas Turbines Power 115(2), 209-217 (Apr 01, 1993) (9 pages) doi:10.1115/1.2906696 History: Received January 18, 1991; Online April 24, 2008


The determination of critical speeds and modes and the unbalance response of rotor-bearing systems is investigated with the application of a technique called the generalized polynomial expansion method (GPEM). This method can be applied to both linear and nonlinear rotor systems; however, only linear systems are addressed in this paper. Three examples including single spool and dual rotor systems are used to demonstrate the efficiency and the accuracy of this method. The results indicate a very good agreement between the present method and the finite element method (FEM). In addition, computing time will be saved using this method in comparison with the finite element method.

Copyright © 1993 by The American Society of Mechanical Engineers
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