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Stoneley waves in three-layered cylindrical solid media
Hanyin Cui1, Jon Trevelyan, Sherri Johnstone
1School of Engineering and Computing Sciences, Durham University, Durham DH1 3LE, United Kingdom. hanyin.cui@durham.ac.uk
Abstract:
This paper considers the propagation of Stoneley modes along the interfaces of three-layered concentric cylindrical solid media in order to assist in the design of ultrasonic transmission rods. The phase velocity dispersion curves and amplitude distributions are numerically analyzed. The modes are analogous to non-dispersive Stoneley waves and are confined to the vicinities of the two interfaces at high frequency. A key finding is that the peak amplitude location for each mode transfers between the two interfaces as a function of frequency. A simplified model is introduced, giving the peak amplitude locations of each mode in different frequency ranges efficiently.
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