HYDROACOUSTICS
ANNUAL JOURNAL |
START | NEW VOL 20 | SEARCH | STATISTICS | PAS - GDANSK DIVISION |
pp. 127-140, vol. 18, 2015 Bodo Nolte Embassy of the Federal Republic of Germany in Poland, Warsaw, Germany Bundeswehr Technical Centre for Ships and Naval Weapons, Maritime Technology and Research, Eckernförde, Germany Jan Ehrlich Bundeswehr Technical Centre for Ships and Naval Weapons, Maritime Technology and Research, Eckernförde, Germany Hans-Günter Hofmann Bundeswehr Technical Centre for Ships and Naval Weapons, Maritime Technology and Research, Eckernförde, Germany Ingo Schäfer Bundeswehr Technical Centre for Ships and Naval Weapons, Maritime Technology and Research, Eckernförde, Germany Alexandra Schäfke Bundeswehr Technical Centre for Ships and Naval Weapons, Maritime Technology and Research, Eckernförde, Germany Arne Stoltenberg Bundeswehr Technical Centre for Ships and Naval Weapons, Maritime Technology and Research, Eckernförde, Germany Ralf Burgschweiger Beuth University for Applied Sciences, Berlin, Germany Key words: stochastic ray tracing; the German Navy Abstract: This report summarizes an overview given at the XXXII Symposium on Hydroacoustics
(SHA 2015) over several modeling techniques that are used in the context of military
applications at the Research Department FWG of the German Bundeswehr Technical Centre
for Ships and Naval Weapons, Maritime Technology and Research (WTD 71). For the
modeling and understanding of sound propagation, a physical model consisting of a tank for
the scaled measurements and the corresponding numerical simulation is presented. The basic
formalism of the stochastic ray tracing of the German Navy sonar simulation MOCASSIN is
explained and compared to traditional deterministic ray tracing, and this includes
comparisons with measurements. Strategies for the approximate calculation of the sonar
target strength of large underwater objects with the use of boundary element methods, fast
multipole methods as well as a ray-based algorithm, are all presented here and the results of
the calculations of several test objects are shown.
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