Acoustic shadow zone of the guided wave in a variable thickness plate

This article calculates and experimentally verifies the curved propagation path of dispersive guided waves. Experiments show that the degree of propagation path bending increases with the increase of frequency in a certain frequency range. On the path that varies along the thickness, the experiment observes an acoustic shadow zone that accounts for nearly 25% of the total path. Additionally, a practical case study involving a guided wave with a curved path is presented. Consideration of the curved path improves the positioning accuracy, offering insights into damage location in variable thickness plates. This research on the propagation path and acoustic shadow zone contributes to advancing the understanding of guided wave propagation characteristics and enhancing their application in nondestructive testing for variable thickness structures.PMID:38471355 | DOI:10.1016/j.ultras.2024.107278

Source: Ultrasonics - March 12, 2024 Category: Physics Authors: Zhiyuan Zhang Bing Li Yanqi Wang Source Type: research