This paper describes an experimental validation of a new structural damage detection method based on the Polynomial Annihilation Edge Detection (PAED) technique, a numerical method for detecting discontinuities in smooth piecewise functions and their derivatives. Since it is well known that concentrated damage such as a crack, causes a discontinuity in the rotations and consequently in the first derivatives of the mode shapes and in general of the deflection shapes of beam-like structures, the PAED can be applied to the problem of damage detection and localisation in these kind of structures for which only post-damage vibration measurements are available. As described in this paper, in order to verify this approach experimentally, vibration tests on a cantilever steel beam with a saw-cut have been performed and Operational Deflection Shapes (ODSs) determined. Since the approach requires a reasonably high spatial resolution of the ODSs, a scanning laser vibrometer, capable of acquiring data rapidly at a very large number of observation points, was used.

Detection and localisation of structural damage based on the Polynomial Annihilation Edge Detection: an experimental verification / Surace, Cecilia; Mattone, Massimiliano Corrado; Gherlone, Marco. - STAMPA. - 569-570:(2013), pp. 1273-1280. (Intervento presentato al convegno X International Conference on Damage Assessment of Structures tenutosi a Dublin, Ireland nel July 8-10 2013) [10.4028/www.scientific.net/KEM.569-570.1273].

Detection and localisation of structural damage based on the Polynomial Annihilation Edge Detection: an experimental verification

SURACE, Cecilia;MATTONE, Massimiliano Corrado;GHERLONE, Marco
2013

Abstract

This paper describes an experimental validation of a new structural damage detection method based on the Polynomial Annihilation Edge Detection (PAED) technique, a numerical method for detecting discontinuities in smooth piecewise functions and their derivatives. Since it is well known that concentrated damage such as a crack, causes a discontinuity in the rotations and consequently in the first derivatives of the mode shapes and in general of the deflection shapes of beam-like structures, the PAED can be applied to the problem of damage detection and localisation in these kind of structures for which only post-damage vibration measurements are available. As described in this paper, in order to verify this approach experimentally, vibration tests on a cantilever steel beam with a saw-cut have been performed and Operational Deflection Shapes (ODSs) determined. Since the approach requires a reasonably high spatial resolution of the ODSs, a scanning laser vibrometer, capable of acquiring data rapidly at a very large number of observation points, was used.
2013
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2513493
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