Abstract
The reflection of elastic waves at a solid-solid boundary in elastic media has been treated by many authors. But there have been only a few papers on the reflection of the waves at a solid-viscous fluid boundary. In this paper, the author treated this probrem in detail, comparing the solid-fluid reflection with the solid-solid one, especially with respect to amplitudes.
The results obtained are as follows; if the incident waves are of infinite coherence of sine-waves, the amplitude of the reflected waves is not effected so much by the density ratio (ρ′/ρ) as by the ratio (ρ′νp/ρμ) and is twice as much as that at a solid-solid boundary, if the incident angle is small and the ratio (ρ′νp/ρμ) is not close to unit. If the incident waves are of finite coherence of sine-waves with “zero-angle” incidence, the reflected waves are deformed slightly at their heads and tails, but the amplitudes are the same as in the above mentioned case.
