Ricerc@Sapienza

In this paper, a Structural Health Monitoring (SHM) procedure, based on the Continuous Wavelet Transform (CWT) applied on a pipe excited by a flow that carries a travelling load, is presented. The proposed procedure allows the early stage localization of damages along the structure. The basic idea is to take advantage of time-space relation given by a traveling load of which speed is known, because wavelet analysis may highlight the singularities of a signal related with the damage.

This paper presents a fast and effective method for the selection of the
least number of scales able to represent significant information of a signal.
To this aim, atoms interference in the time-scale wavelet domain is used
to represent distinct configurations of transform coefficients; the goal is
to find those scales where transform coefficients change their configura-
tion. The selected set of scales cannot provide a dyadic partition of the
frequency domain. The rational dilation wavelet transform is a
exible