Observation of Shear-Wave in Lamb's Problem

Lamb (1904) proposed a numerical solution of transient waves for a point source and a point receiver located on the surface of elastic homogeneous half-space. After Lamb proposed his solution, some acoustical experimentalists tried to observe these transient waves. Longitudinal-, and Rayleigh-waves propagation along surfaces were measured, but the shear- wave (S-wave) has never previously been observed until now. In this study, small size transducers, and a high power, high performance pulse/receiver were used to excite and receive ultrasound propagation along the surface of a duralumin block with a 16-bit digital oscilloscope utilized to survey the signal. We observed the front part of an S-wave propagating with S-wave velocity along the surface, although the full waveform of the S-wave was not measured.

並列關鍵字

Lamb's problem ； Shear-wave ； Ultrasound

國際替代計量

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