| 表面噪声矢量场空间相关特性射线声学建模(英文) |
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| 引用本文： | 黄益旺,任群言,李婷.表面噪声矢量场空间相关特性射线声学建模(英文)[J].船舶与海洋工程学报,2012,11(1):119-125. |
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| 作者姓名： | 黄益旺 任群言 李婷 |
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| 作者单位： | Science and Technology on Underwater Acoustic Laboratory,Harbin Engineering University;Environmental Hydroacoustics Laboratory,Université Libre de Bruxelles(U.L.B),av.F.D.Roosevelt 50,B-1050 Brussels,Belgium;Department of Naval Architecture,Dalian University of Technology |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No.50909028 |
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| 摘 要： | Spatial correlation of sound pressure and particle velocity of the surface noise in horizontally stratified media was demonstrated,with directional noise sources uniformly distributed on the ocean surface.In the evaluation of particle velocity,plane wave approximation was applied to each incident ray.Due to the equivalence of the sound source correlation property and its directivity,solutions for the spatial correlation of the field were transformed into the integration of the coherent function generated by a single directional source.As a typical horizontally stratified media,surface noise in a perfect waveguide was investigated.Correlation coefficients given by normal mode and geometric models show satisfactory agreement.Also,the normalized covariance between sound pressure and the vertical component of particle velocity is proportional to acoustic absorption coefficient,while that of the surface noise in semi-infinitely homogeneous space is zero.
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| 关 键 词： | spatial correlation sound pressure and particle velocity surface noise stratified media ray theory |
A geometric model for the spatial correlation of an acoustic vector field in surface-generated noise |
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| Yiwang Huang,Qunyan Ren,Ting Li.A geometric model for the spatial correlation of an acoustic vector field in surface-generated noise[J].Journal of Marine Science and Application,2012,11(1):119-125. |
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| Authors: | Yiwang Huang Qunyan Ren Ting Li |
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| Institution: | 1.Science and Technology on Underwater Acoustic Laboratory,Harbin Engineering University,Harbin 150001,China 2.Environmental Hydroacoustics Laboratory,Université Libre de Bruxelles(U.L.B),av.F.D.Roosevelt 50,B-1050 Brussels,Belgium 3.Department of Naval Architecture,Dalian University of Technology,Dalian 116024,China |
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| Abstract: | Spatial correlation of sound pressure and particle velocity of the surface noise in horizontally stratified media was demonstrated,
with directional noise sources uniformly distributed on the ocean surface. In the evaluation of particle velocity, plane wave
approximation was applied to each incident ray. Due to the equivalence of the sound source correlation property and its directivity,
solutions for the spatial correlation of the field were transformed into the integration of the coherent function generated
by a single directional source. As a typical horizontally stratified media, surface noise in a perfect waveguide was investigated.
Correlation coefficients given by normal mode and geometric models show satisfactory agreement. Also, the normalized covariance
between sound pressure and the vertical component of particle velocity is proportional to acoustic absorption coefficient,
while that of the surface noise in semi-infinitely homogeneous space is zero. |
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| Keywords: | spatial correlation sound pressure and particle velocity surface noise stratified media ray theory |
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