Abstract
Experimental and theoretical investigations of Lamb waves excitation and sensing by rectangular piezoelectric transducers perfectly and imperfectly mounted on the surface of a plate are presented in this study. Out-of-plane velocities measurements via laser Doppler vibrometry and voltage signal measurements by the piezoelectric transducers are compared in the context of SHM. The semi-analytical hybrid approach to simulate Lamb waves excitation and sensing by rectangular PWAS in a plate is presented. Reasons for the deviations between the simulated and the measured signals are analyzed. The effects of partial debonding of the piezoelectric transducers are considered and influence of the debonding on sensing abilities is analysed using obtained mathematical model.
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