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Summary

This summary is machine-generated.

This study shows how acoustic waves on a panel create structural waves. These waves can be manipulated using Bragg scattering to determine the original acoustic trace wavelength and incident angle.

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Area of Science:

Acoustics
Solid Mechanics
Wave Physics

Background:

Incident plane waves generate acoustic surface waves on panels.
These acoustic waves induce panel vibrations, creating propagating structural waves.
Understanding the relationship between acoustic excitation and structural response is crucial.

Purpose of the Study:

To investigate the possibility of resolving acoustic trace wavelengths from panel vibrations.
To explore the use of Bragg scattering for analyzing structural wave replicas.
To determine the incident angle of a plane wave based on the panel's response.

Main Methods:

Analysis of acoustic trace wavelength propagation along a panel surface.
Modeling the excitation of structural waves within the panel due to acoustic waves.
Utilizing Bragg scattering to generate shifted replicas of the structural wave's wavenumber.

Main Results:

Bragg scattering creates wavenumber replicas of the structural waves.
These replicas are shifted by a wavenumber inversely proportional to the periodic separation distance.
The acoustic trace wavelength can be resolved from these shifted replicas.

Conclusions:

It is theoretically possible to determine the incident acoustic trace wavelength from the panel's structural response.
The incident angle can be calculated using the resolved acoustic trace wavelengths.
This method offers a potential approach for non-contact analysis of incident wave characteristics.