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RESEARCH PAPERS

On Vibrations of a System With an Eigenfrequency Identical to That of One of Its Subsystems

[+] Author and Article Information
A. V. Pesterev

State Institute of Physics and Technology, 13/7, Prechistenka Str., Moscow, 119034 Russia

L. A. Bergman

Department of Aeronautical and Astronautical Engineering, University of Illinois, Urbana, IL 61801

J. Vib. Acoust 117(4), 482-487 (Oct 01, 1995) (6 pages) doi:10.1115/1.2874487 History: Received December 01, 1993; Online February 26, 2008

Abstract

The free vibrations of a complex system with a natural frequency identical to that of one of its subsystems is discussed. Such eigenvibrations need special consideration in many modal synthesis methods as the characteristic matrix (equation) does not exist. Particular emphasis has been placed on the case where a resonating subsystem is subjected to forces from other subsystems, which has not received sufficient attention in the literature on substructure synthesis methods. Examples of such eigenvibrations for two simple systems are given. A general equation for system eigenfunctions corresponding to eigenfrequencies of the isolated subsystems is presented and discussed.

Copyright © 1995 by The American Society of Mechanical Engineers
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