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RESEARCH PAPERS

Interaction in Primary-Secondary Systems

[+] Author and Article Information
T. Igusa

Department of Civil Engineering, Northwestern University, Evanston, IL 60208

A. Der Kiureghian

Department of Civil Engineering, University of California at Berkeley, Berkeley, CA 94720

J. Pressure Vessel Technol 114(1), 53-59 (Feb 01, 1992) (7 pages) doi:10.1115/1.2929012 History: Received November 15, 1988; Revised June 08, 1991; Online June 17, 2008

Abstract

Primary-secondary systems, consisting of a primary subsystem supporting a relatively light secondary subsystem, are characterized by special dynamic characteristics. One important characteristic is interaction, which is mathematically manifested by coupling between the equations of motion of the two subsystems and results in a reduction in the secondary response. The dynamic analysis of P-S systems is often performed using a decoupled system of equations which is simpler to analyze, but may give overly conservative results leading to unnecessarily costly designs. In this paper, interaction in P-S systems is examined in detail, criteria for assessing the importance of interaction are developed, and the concepts are illustrated with examples of interacting systems.

Copyright © 1992 by The American Society of Mechanical Engineers
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