A 2-WAY PARABOLIC EQUATION FOR ACOUSTIC BACKSCATTERING IN THE OCEAN

被引:116
作者
COLLINS, MD [1 ]
EVANS, RB [1 ]
机构
[1] SCI APPLICAT INT CORP,NEW LONDON,CT 06320
关键词
D O I
10.1121/1.402465
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
The parabolic equation (PE) method is generalized to handle backscattered acoustic energy in the ocean. The two-way PE is based on the single-scattering approximation and the approach of two-way coupled modes in which range-dependent environments are approximated by a sequence of range-independent regions. At the vertical boundaries between regions, the solution of the two-way PE is required to satisfy two continuity conditions. The range derivative in one of the conditions is replaced by a higher-order PE depth operator. The reflected and transmitted fields that satisfy these conditions are computed with an efficient iteration scheme. The outgoing and incoming fields are propagated by two-way range marching. The two-way PE, which is presently implemented for two-dimensional problems, is a practical method for solving large-scale reverberation problems. The accuracy of the two-way PE is demonstrated by comparisons with reference solutions. The two-way PE is applied to simulate the localization of a source of backscattering using the method of back propagation.
引用
收藏
页码:1357 / 1368
页数:12
相关论文
共 53 条
[31]   AN APPROXIMATE METHOD FOR THE STUDY OF TRANSVERSE DISCONTINUITIES IN WAVE-GUIDES [J].
KRIEGSMANN, GA ;
PETROPOULOS, PG .
WAVE MOTION, 1991, 13 (02) :123-131
[32]   A NEW FORMULATION OF ELECTROMAGNETIC-WAVE SCATTERING USING AN ON-SURFACE RADIATION BOUNDARY-CONDITION APPROACH [J].
KRIEGSMANN, GA ;
TAFLOVE, A ;
UMASHANKAR, KR .
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 1987, 35 (02) :153-161
[34]   SOUND CHANNEL IN AN EXPONENTIALLY STRATIFIED OCEAN, WITH APPLICATION TO SOFAR [J].
MUNK, WH .
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1974, 55 (02) :220-226
[35]   A FINITE-ELEMENT MODEL FOR OCEAN ACOUSTIC PROPAGATION AND SCATTERING [J].
MURPHY, JE ;
CHINBING, SA .
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1989, 86 (04) :1478-1483
[36]   SIGNAL DETECTION IN A MULTIPATH MEDIUM BY MESS PROCESSING [J].
PARVULESCU, A .
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1961, 33 (11) :1674-+
[37]   AN APPROXIMATION TO THE 3-DIMENSIONAL PARABOLIC-EQUATION METHOD FOR ACOUSTIC PROPAGATION [J].
PERKINS, JS ;
BAER, RN .
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1982, 72 (02) :515-522
[38]   THE PROBLEM OF ENERGY-CONSERVATION IN ONE-WAY MODELS [J].
PORTER, MB ;
JENSEN, FB ;
FERLA, CM .
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1991, 89 (03) :1058-1067
[39]   AN ENERGY-CONSERVING PARABOLIC EQUATION INCORPORATING RANGE REFRACTION [J].
SCHURMAN, IW ;
SIEGMANN, WL ;
JACOBSON, MJ .
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1991, 89 (01) :134-144
[40]   SOLUTIONS TO RANGE-DEPENDENT BENCHMARK PROBLEMS BY THE FINITE-DIFFERENCE METHOD [J].
STEPHEN, RA .
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1990, 87 (04) :1527-1534