Abstract

A multi-Gaussian beam model is used to simulate an immersion transducer radiating into an anisotropic solid through a curved fluid–solid interface. It is shown that the characteristics of the beam as it propagates in the solid are controlled by the properties of the slowness surface and the interface geometry. Methods are discussed for efficiently extracting the slowness surface properties including the development of an explicit expression for the curvature of the slowness surface. A number of numerical examples are presented to demonstrate the effects that both the slowness surface and interface geometry have on an ultrasonic beam.

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