Time-domain simulations of sound propagation in a stratified atmosphere over an impedance ground

被引：14
|
作者：
Cotte, Benjamin [1 ]
Blanc-Benon, Philippe [1 ]
机构：
[1] Ecole Cent Lyon, CNRS, LMFA, UMR 5509, F-69134 Ecully, France
来源：
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2009年 / 125卷 / 05期
关键词：
DISSIPATIVE EXPLICIT SCHEMES; BOUNDARY-CONDITIONS; ACOUSTIC-IMPEDANCE; POROUS SURFACES; MODELS; ORDER; FLOW;
D O I：
10.1121/1.3104633
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
Finite-difference time-domain simulations of broadband sound propagation in a stratified atmosphere are presented. A method recently proposed to obtain an impedance time-domain boundary condition is implemented in a linearized Euler equations solver, which enables to study long range sound propagation over an impedance ground. Some features of the pressure pulse evolution with time are analyzed in both upward-and downward-refracting conditions, and the time-domain simulations are compared to parabolic equation calculations in the frequency domain to show the effectiveness of the proposed impedance boundary condition. (C) 2009 Acoustical Society of America
引用
收藏
页码：EL202 / EL207
页数：6
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