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TECHNICAL BRIEFS

Further Results on Iterative Approaches to the Determination of the Response of Nonclassically Damped Systems

[+] Author and Article Information
Firdaus E. Udwadia

Civil Engineering and Decision Systems, University of Southern California, Los Angeles, CA 90089-1453

J. Appl. Mech 60(1), 235-239 (Mar 01, 1993) (5 pages) doi:10.1115/1.2900761 History: Received June 26, 1991; Revised October 24, 1991; Online March 31, 2008

Abstract

Iterative schemes for obtaining the response of nonclassically damped dynamic systems have been shown to converge when the damping matrix possesses certain specific characteristics. This paper extends those previous results which pertain to symmetric, positive-definite damping matrices. The paper considers a more general decomposition of the damping matrix, and extends the applicability of these iterative methods to all positive definite, symmetric damping matrices. This decomposition is governed by a parameter α. Conditions on α under which convergence is guaranteed are provided. Estimates of a which yield the fastest asymptotic convergence as well as estimates of the value of this asymptotic rate of convergence are also provided.

Copyright © 1993 by The American Society of Mechanical Engineers
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