A crack in a structure causes a discontinuity in the first derivative of the mode shapes: On this basis, a numerical method for detecting discontinuities in smooth piecewise functions and their derivatives, based on a polynomialannihilation technique, has been applied to the problem of crack detection and localisation in beam-like structures for which only post-damage mode shapes are available. Using a finite-element model of a cracked beam, the performance of this methodology has been analysed for different crack depths and increasing amounts of noise. Given the crack position, a procedure to estimate its depth is also proposed and corresponding results shown.

On the Use of the Polynomial Annihilation Edge Detection for Locating Cracks in Beam-Like Structures / Surace, Cecilia; R., Archibald; R., Saxena. - In: COMPUTERS & STRUCTURES. - ISSN 0045-7949. - ELETTRONICO. - 114-115:(2013), pp. 72-83. [10.1016/j.compstruc.2012.10.008]

On the Use of the Polynomial Annihilation Edge Detection for Locating Cracks in Beam-Like Structures

SURACE, Cecilia;
2013

Abstract

A crack in a structure causes a discontinuity in the first derivative of the mode shapes: On this basis, a numerical method for detecting discontinuities in smooth piecewise functions and their derivatives, based on a polynomialannihilation technique, has been applied to the problem of crack detection and localisation in beam-like structures for which only post-damage mode shapes are available. Using a finite-element model of a cracked beam, the performance of this methodology has been analysed for different crack depths and increasing amounts of noise. Given the crack position, a procedure to estimate its depth is also proposed and corresponding results shown.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2503527
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