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RESEARCH PAPERS: Modal Analysis

Three New Methods of Modal Identification

[+] Author and Article Information
L. Jezequel

Département de Mécanique des Solides, Ecole Centrale de Lyon, 69130-Ecully, France

J. Vib., Acoust., Stress, and Reliab 108(1), 17-25 (Jan 01, 1986) (9 pages) doi:10.1115/1.3269297 History: Received June 17, 1985; Online November 23, 2009

Abstract

The identification of linear systems based on their dynamic responses has been the object of a great number of studies. In this work, we propose three new identification procedures which can be programmed on a microcomputer. The first of these methods uses an analytical extension of the transfer function, the second method uses a special integral transformation based on the Cauchy-Weierstrass theorem and the last method uses orthogonalization of the experimental displacement shapes by the Ritz-Galerkin procedure. These methods allow rapid detection of the modal parameters. Presented separately, they are applied to identical structure models defined in the first part of this study.

Copyright © 1986 by ASME
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