Scholte–Stoneley waves on an immersed solid dihedral: Generation, propagation and scattering effects

Abstract

Scholte-Stoneley wave propagation on a dihedral and more precisely the diffraction effects occurring at the corners, has since long been of high importance for nondestructive testing of materials and structures. Experimental investigations have been reported in the past. Simulations based on radiation mode theory have been published before, explaining the only situation for which the model is applicable namely rectangular corners. The current report describes an investigation applying finite element simulations. Results are obtained not only for rectangular corners but for any possible corner angle. The outcome is in agreement with reported experiments. Moreover a critical corner angle is found below and beyond which different diffraction phenomena occur. The study is performed for different isotropic solids.

[Retracted] Analysis of VLF Wave Field Components and Characteristics Based on Finite Element Time‐Domain Method

“…VLF acoustic signals with strong penetrating power penetrate the sea bottom when propagating in the shallow sea. Thus, VLF acoustic energy leaks into the sea bottom and excites other sound field components that can propagate through the sea bottom or liquid-solid interface [10][11][12][13]. These components-such as the compression wave (Pwaves), the shear wave (S-waves), the normal mode waves, and the interface waves-are all important for understanding the conversion mechanism and spatial and temporal distribution of low-frequency sound waves [13][14][15][16].…”

“…Thus, VLF acoustic energy leaks into the sea bottom and excites other sound field components that can propagate through the sea bottom or liquid-solid interface [10][11][12][13]. These components-such as the compression wave (Pwaves), the shear wave (S-waves), the normal mode waves, and the interface waves-are all important for understanding the conversion mechanism and spatial and temporal distribution of low-frequency sound waves [13][14][15][16]. The systematic study of excitation, propagation, and detection of different components of low-frequency sound fields has essential application value in ocean acoustics and geophysics.…”