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DUARTE, M. L. M.; CYPRIANO, R. R. S. The use of FRFS for damage detection os structures : an initial study. In: CONGRESSO INTERNACIONAL SOBRE O COMPORTAMENTO DE ESTRUTURAS DANIFICADAS, 1998, Rio de Janeiro. Anais... Rio de Janeiro, 1998.
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Abstract

This paper explores one of the basic lines of research in the area of dynamic damage detection, namely, the use of FRFs for detection and location of damage in structures. It is part of a study been currently undertaken where two different FRF based techniques for damage detection are investigated: a) the one using resonances for detection of damage and anti-resonances for its location and b) the one using the orthogonality property of the FRF matrix for both detection and location of damage. The main objective of the paper is to study the influence of noise in the measured FRFs used in each of the techniques, since this point was not included in the original works. Some examples are provided to illustrate the observations made.
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