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Titolo:
A PARABOLIC EQUATION FOR PORE-ELASTIC MEDIA
Autore:
COLLINS MD; KUPERMAN WA; SIEGMANN WL;
Indirizzi:
USN,RES LAB WASHINGTON DC 20375 UNIV CALIF SAN DIEGO,SCRIPPS INST OCEANOG LA JOLLA CA 92093 RENSSELAER POLYTECH INST TROY NY 12180
Titolo Testata:
The Journal of the Acoustical Society of America
fascicolo: 3, volume: 98, anno: 1995,
pagine: 1645 - 1656
SICI:
0001-4966(1995)98:3<1645:APEFPM>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
WAVE-PROPAGATION; ACOUSTIC PROPAGATION; OCEAN; BOTTOM; REFLECTION; APPROXIMATION; INTERFACE; DEPTH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
M.D. Collins et al., "A PARABOLIC EQUATION FOR PORE-ELASTIC MEDIA", The Journal of the Acoustical Society of America, 98(3), 1995, pp. 1645-1656

Abstract

The parabolic equation (PE) method is extended to handle problems involving pore-elastic layers [M. A. Blot, ''Theory of propagation of elastic waves in a fluid-saturated porous solid,'' J. Acoust. Sec. Am. 28, 168-191 (1956)]. The equations of motion are derived for heterogeneous pore-elastic media. Interface conditions that are appropriate for the PE method are derived for coupling to fluid and elastic layers. Forthe two-dimensional geometry (range and depth) that is representativeof many problems in ocean acoustics, the equations of motion reduce to three coupled equations that factor into outgoing and incoming wave equations (the standard formulation has a redundant equation). The outgoing wave equation is solved with the PE method using rational approximations. The pore-elastic PE, which is a generalization of the elastic PE, is an efficient approach for solving range-dependent propagationproblems involving an ocean overlying a pore-elastic sediment. The self-starter is generalized to handle compressional and shear sources inpore-elastic layers. The coefficients of the pore-elastic wave equation are derived from a set of natural parameters. (C) 1995 Acoustical Society of America.

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Documento generato il 25/09/20 alle ore 00:38:09