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TECHNICAL BRIEFS

Nonlinear Transient Analysis of Large Rotordynamic Systems

[+] Author and Article Information
T. N. Shiau, A. N. Jean

Institute of Aeronautics and Astronautics, National Cheng-Kung Univerisity, Tainan, Taiwan 70101

J. Appl. Mech 58(2), 596-598 (Jun 01, 1991) (3 pages) doi:10.1115/1.2897233 History: Received May 09, 1989; Revised February 27, 1990; Online March 31, 2008

Abstract

A solution technique based on implicit numerical integration combined with a condensation technique is presented to predict the transient response of large flexible rotor systems with nonlinear characteristics. The analysis directly tackles the nonlinear second-order differential equations which describe the system motion. The condensation technique can lead to a reduced model in which only the coordinates associated with nonlinear components of the system are considered. Thus, a substantial reduction of computation can be expected if the nonlinear components of system are sparse. A flexible rotor system is studied to illustrate the merits of the procedures. The results show that, if the system is of a small number of coordinates associated with nonlinear components compared to that of entire system degrees-of-freedom, the computational time can be considerably reduced using this technique.

Copyright © 1991 by The American Society of Mechanical Engineers
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