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 contribution | Damage Observability, Localization and Assessment based on Eigenfrequencies and Eigenvectors Curvatures |
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Original language | English |
Pages (from-to) | 191 - 204 |
Number of pages | 21 |
Journal | Smart Structures and Systems |
Volume | 8 |
Publication status | Published - Feb 2011 |