A coupled-mode method for sound propagation in a range-dependent penetrable waveguide

被引：5

作者：

Yang Chun-Mei ^{[1
,2
]}

Luo Wen-Yu ^{[1
]}

Zhang Ren-He ^{[1
]}

Qin Ji-Xing ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Acoust, State Key Lab Acoust, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

ACTA PHYSICA SINICA | 2013年 / 62卷 / 09期

基金：

中国国家自然科学基金;

关键词：

coupled-mode theory; direct global matrix approach; penetrable waveguide; DIFFERENTIAL-EQUATIONS; ACOUSTIC PROPAGATION; SCATTERING; ENVIRONMENTS; BATHYMETRY; SHELLS;

D O I：

10.7498/aps.62.094302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The coupled-mode method based on the direct global matrix (DGMCM) approach for sound propagation in range-dependent waveguides [Luo et al., "A numerically stable coupled-mode formulation for acoustic propagation in range-dependent waveguides," Sci. China-Phys. Mech. Astron. 55, 572 (2012)] is further developed. The normal mode model KRAKEN is adopted to provide local modal solutions and their associated coupling matrices. As a result, the model DGMCM is capable of providing full two-way solutions for the two-dimensional realistic problems characterized by a penetrable bottom and a depth-varying sound speed profile. In addition, the closed-form expressions of coupling matrices for sound propagation in a range-dependent, two-layer waveguide are proposed. The numerical solutions of the coupling matrices by DGMCM agree well with the analytical solutions. Sound propagation in a penetrable wedge is solved by the updated DGMCM model. The numerical results indicate that the updated DGMCM model is numerically stable and accurate, and can provide benchmark solutions for realistic range-dependent problems.

引用

页数：12

共 28 条

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