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RESEARCH PAPERS

Normal and Quasi-Normal Modes in Damped Linear Dynamic Systems

[+] Author and Article Information
J. S. Maybee

Purdue University, Lafayette, Ind.

J. Appl. Mech 33(2), 413-416 (Jun 01, 1966) (4 pages) doi:10.1115/1.3625058 History: Received April 28, 1965; Online September 15, 2011

Abstract

A generalization of the concept of classical normal modes in damped linear systems is presented. It is then shown that a necessary and sufficient condition that such quasi-normal modes exist is that certain matrices associated with the system commute. Necessary and sufficient conditions of the same type are also obtained for the classical normal modes, but under more restrictive conditions.

Copyright © 1966 by ASME
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