Prediction of Periodic Response of Flexible Mechanical Systems With Nonlinear Characteristics

[+] Author and Article Information
Ting-Nung Shiau, An-Nan Jean

Institute of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan, R.O.C.

J. Vib. Acoust 112(4), 501-507 (Oct 01, 1990) (7 pages) doi:10.1115/1.2930135 History: Received April 01, 1989; Revised January 01, 1990; Online June 17, 2008


A numerical-analytical method for the prediction of steady state periodic response of large order nonlinear rotordynamic systems is addressed. Using this method, the set of nonlinear differential equations governing the motion of the rotor systems is transformed to a set of nonlinear algebraic equations. A condensation technique is proposed to reduce the nonlinear algebraic equations to those only related to the physical coordinates associated with nonlinear components. The method allows for the inclusion of searching for sub, super, ultra-sub and ultra-super harmonic components of the system response. Furthermore it can be used to locate limit cycles of an autonomous system. Three examples are employed to demonstrate the accuracy and the efficiency of the present method.

Copyright © 1990 by The American Society of Mechanical Engineers
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