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RESEARCH PAPERS

A Simplified Stability Criterion for Nonconservative Systems

[+] Author and Article Information
I. Fawzy

Department of Mechanical Design, Cairo University, Cairo, Egypt

J. Appl. Mech 46(2), 423-426 (Jun 01, 1979) (4 pages) doi:10.1115/1.3424566 History: Received October 01, 1977; Revised August 01, 1978; Online July 12, 2010

Abstract

Dynamic stability of a general nonconservative system of n degrees of freedom is investigated. A sufficient and necessary condition for the stability of such a system is developed. It represents a simplified criterion based on the famous Lyapunov’s theorem which is proved afresh using λ-matrix methods only. When this criterion is adopted, it reduces the number of equations in Lyapunov’s method to less than half. A systematic procedure is then suggested for the stability investigation and its use is illustrated through a numerical example at the end of the paper.

Copyright © 1979 by ASME
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