Lamb wave resonance transmission through a system of deep notches in a plate‐like waveguide.

Abstract: The results of theoretical and experimental investigation into resonance phenomena accompanying guided wave propagation in a metallic plate with a finite regular system of rectangular deep notches are presented. While the expected intensification of wave blocking by a system of notches comparing to the case of a single defect is confirmed, the resonance transmission at the predicted frequencies within these forming stop bands is also observed. Noticeable motion localization in the waveguide area between the notches at these frequencies is visualized with experimental surface B‐scans. Their patterns coincide with the theoretical predictions obtained on the basis of a semi‐analytical computer model for the notched infinite plate. (© 2017 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim) [ABSTRACT FROM AUTHOR]