Steady-State Analysis of a Nonlinear Rotor-Housing System

[+] Author and Article Information
Y. B. Kim, S. T. Noah

Mechanical Engineering Department, Texas A&M University, College Station, TX 77843-3123

J. Eng. Gas Turbines Power 113(4), 550-556 (Oct 01, 1991) (7 pages) doi:10.1115/1.2906276 History: Received January 19, 1990; Online April 24, 2008


The periodic steady-state response of a high-pressure oxygen turbopump (HPOTP) of a space shuttle main engine (SSME), involving a clearance between the bearing and housing carrier, is sought. A harmonic balance method utilizing Fast Fourier Transform (FFT) algorithm is developed for the analysis. An impedance method is used to reduce the number of degrees of freedom to the displacements at the bearing clearance. Harmonic and subharmonic responses to imbalance for various system parameters are studied. The results show that the computational technique developed in this study is an effective and flexible method for determining the stable and unstable periodic response of complex rotor-housing systems with clearance-type nonlinearity.

Copyright © 1991 by The American Society of Mechanical Engineers
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