Development of Computer Programs Using the Method of Images to Predict the Sound Field in a Wedge Overlaying a Fast Fluid and Comparison with Laboratory Experiments

摘要

Two computer programs using the method of images to determine the pressure amplitude and phase distribution in a wedge shaped medium overlaying a fast fluid bottom were studied. WEDGE used a source at infinity and was constrained to upslope, on axis predictions, while CROSS SLOPE, using a source at finite distance, made predictions anywhere within the medium. Comparison of the two programs suggest that an infinite source is not approached until the source exceeds six hundred dump distances from the apex. CROSS SLOPE prediction of pressure amplitude were in agreement with experimental data obtained in the upslope direction, and with sound field similar to that described by the theory of Buckingham but of much richer variety. (Author)