Abstract
Benchmark solutions exist for range-dependent acoustic propagation in fluid-only media [J. Acoust. Soc. Am. 87, 1497–1545 (1990)]. However, not many reference solutions are available for the case of mixed fluid-elastic media. Some simple canonical benchmark problems are presented and the solutions from four different computational methods are compared. They are the elastic PE [J. Acoust. Soc. Am. 93, 1815–1825 (1993)], boundary element method [J. Acoust. Soc. Am. 89, 1629–1642 (1991)], wave-number integration approach [J. Acoust. Soc. Am. 97(A), 3316 (1995)], and a spectral superelement formulation [J. Acoust. Soc. Am. 98, 465–472 (1995)]. Both forward and backscattered results are presented. A common thread in the last three approaches is the use of the SAFARI/OASES code as a Green’s function generator. Conclusions regarding the general performances of these methods are drawn for the various test cases. [Work supported by ONR.]
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