A Unified Theoretical Description of Ultrasonic Beam Reflections from a Solid Plate in a Liquid.
Technical rept. 1 Oct-1 Dec 75,
GEORGETOWN UNIV WASHINGTON D C DEPT OF PHYSICS
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The study represents a theoretical analysis of reflectivities from a solid bounded by a liquid specifically, it takes into account the dimensions of the solid as compared to the wavelength of the incident sonic signal. The result of the study is a unified theory which explains certain equivalencies between the Rayleigh mode of vibration when the solid is infinitely thick and the various Lamb modes when the reflecting solid has finite dimensions, i.e., when the reflecting solid has a plate-like structure. A knowledge of the reflection coefficient for an ice water interface is of importance when a sonic event takes place in the water and sound energy reaches the ice.
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