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Titolo:
SPECTRAL AND MODAL REPRESENTATIONS OF THE DOPPLER-SHIFTED FIELD IN OCEAN WAVE-GUIDES
Autore:
SCHMIDT H; KUPERMAN WA;
Indirizzi:
MIT CAMBRIDGE MA 02139 UNIV CALIF SAN DIEGO,SCRIPPS INST OCEANOG LA JOLLA CA 92093
Titolo Testata:
The Journal of the Acoustical Society of America
fascicolo: 1, volume: 96, anno: 1994,
pagine: 386 - 395
SICI:
0001-4966(1994)96:1<386:SAMROT>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
11
Recensione:
Indirizzi per estratti:
Citazione:
H. Schmidt e W.A. Kuperman, "SPECTRAL AND MODAL REPRESENTATIONS OF THE DOPPLER-SHIFTED FIELD IN OCEAN WAVE-GUIDES", The Journal of the Acoustical Society of America, 96(1), 1994, pp. 386-395

Abstract

A simple spectral representation is derived for the Doppler-shifted field in general stratified waveguides, including those with elastic bottoms and ice covers. By transforming the field representation for a moving, finite bandwidth source into the moving receiver's frame of reference, a spectral integral representation is obtained for the dynamictransfer functions, which may then be transformed into time domain responses by standard Fourier synthesis. The spectral representation of the Doppler-shifted field is more general than earlier modal formulations since it is not based on any assumptions concerning the invarianceof mode shapes, and it properly accounts for modal cutoff effects. However, it will be demonstrated that its approximate modal expansion isconsistent with earlier modal formulations. The spectral formulation has been implemented in an existing wave-number integration code, and applied to illustrate the fundamental physics of the source/receiver dynamics in stratified waveguides. Examples include moving source/receivers in shallow water, and the acoustic emission produced by propagating ice fractures in the Arctic.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 13:56:12