Damage Observability, Localization and Assessment based on Eigenfrequencies and Eigenvectors Curvatures

J Ciambella, F Vestroni, S Vidoli

Research output: Contribution to journalArticle (Academic Journal)peer-review

12 Citations (Scopus)

Abstract

A technique for damage localization and assessment based on measurements of both eigenvectors curvatures and eigenfrequencies is proposed. The procedure is based on two successive steps: a model independent localization, based on changes of modal curvatures, and the solution of a one-dimensional minimization problem to evaluate damage intensity. The observability properties of damage parameters is discussed and, accordingly, a suitable change of coordinates is introduced. The proposed technique is illustrated with reference to a cantilever Euler beam endowed with a set of piezoelectric transducers. To assess the robustness of the algorithm, a parametric study of the identification errors with respect to the number of transducers and to the number of considered modal quantities is carried out with both clean and noise-corrupted data.
Translated title of the contributionDamage Observability, Localization and Assessment based on Eigenfrequencies and Eigenvectors Curvatures
Original languageEnglish
Pages (from-to)191 - 204
Number of pages21
JournalSmart Structures and Systems
Volume8
Publication statusPublished - Feb 2011

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