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Shock and Vibration
Volume 12, Issue 5, Pages 377-388
http://dx.doi.org/10.1155/2005/581634

Finite Element Model Updating Using FRF Measurements

Farid Asma and Amar Bouazzouni

Laboratory of Mechanics, Structures and Energetic, University Mouloud Mammeri, LP 17 RP 15000 Tizi-ouzou, Algeria

Received 22 November 2004; Revised 22 February 2005

Copyright © 2005 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study presents a new updating method based on measured frequency response functions. The objective function of the minimization procedure is formed by the difference between the measured and the analytical frequency responses. The updating parameters are the correction coefficients related to each the elementary mass and stiffness matrices. While making use of a number of incomplete measurements for some frequencies, one builds a non-linear system of equations. The linearisation of the numerical system leads to an iterative procedure. An intrinsic frequency parametrization is proposed in order to accelerate the convergence of the iterative system. The obtained results are comparable with those of the known least squares methods.