Repositório Institucional da Produção Científica da Marinha do Brasil (RI-MB)

Please use this identifier to cite or link to this item: https://www.repositorio.mar.mil.br/handle/ripcmb/844272
Title: Simplex based three-dimensional eigenray search for underwater predictions
Authors: Calazan, Rogério de Moraes
Rodríguez, Orlando Camargo
Keywords: Ciência, tecnologia e inovação
Acústica Submarina
DGPM knowledge areas: Ciência, Tecnologia e Inovação
Issue Date: 2018
Publisher: Acoustical Society of America (ASA)
Abstract: A solution for the calculation of three-dimensional (3D) eigenrays based on Simplex optimization, implemented in a 3D Gaussian beam model, is investigated in this paper. The validation and performance of the solution were analyzed through comparisons against an equivalent (flat) two-dimensional waveguide, and against results of a tank scale experiment presented in Sturm and Korakas [(2013). J. Acoust. Soc. Am. 133(1), 108–118], in which cross-slope propagation in a wedge waveguide with a mild slope was considered. It was found that the search strategy based on Simplex optimization was able to calculate efficiently and accurately 3D eigenrays, thus providing predictions of arrival patterns along cross-slope range, which replicated elaborate patterns of mode shadow zones, intra-mode interference, and mode arrivals. A remarkable aspect of the search strategy was its ability to provide accurate values of initial eigenray elevation and azimuth, within the accuracy defined for the eigenray to arrive at the location of a given hydrophone.
Access: Open access
URI: http://www.repositorio.mar.mil.br/handle/ripcmb/844272
ISSN: 0001-4966
Type: Journal article
Appears in Collections:Ciência, Tecnologia e Inovação: Coleção de Artigos

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