In this paper it is shown that eigenvalue shifts contain information on certain generalized Fourier coefficients of the stiffness variation caused by damage in a vibrating rod. Under the assumptions that the damaged rod is a perturbation of the undamaged one and the damage belongs to a half of the rod, a reconstruction procedure based on an iterative algorithm is proposed. The theoretical results are confirmed by a comparison with dynamic measurements on steel rods with localized damage.
Generalized Fourier coefficients and applications to damage detection in rods
MORASSI, Antonino
2007-01-01
Abstract
In this paper it is shown that eigenvalue shifts contain information on certain generalized Fourier coefficients of the stiffness variation caused by damage in a vibrating rod. Under the assumptions that the damaged rod is a perturbation of the undamaged one and the damage belongs to a half of the rod, a reconstruction procedure based on an iterative algorithm is proposed. The theoretical results are confirmed by a comparison with dynamic measurements on steel rods with localized damage.File in questo prodotto:
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