浅海随机内波环境构建的新方法
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- 英文论文题名：Anew way ofgenerating random internal waves in shallow water environment
- 论文作者：史文佳 ; 宋文华
- 英文论文作者：SHI Wen-jia ; SONG Wen-hua ; The ocean university of China
- 年：2016
- 作者机构：中国海洋大学海洋技术系;
- 论文关键词：线性内波 ; 声速剖面 ; HNM ; 功率谱
- 英文论文关键词：linear internal wave ; sound speed profile ; HNM ; power spectrum
- 会议召开时间：2016-08-21
- 会议录名称：2016’中国西部声学学术交流会论文集
- 语种：中文
- 分类号：P733.2
- 学会代码：SXJS
- 会议名称：2016’中国西部声学学术交流会
- 会议地点：中国四川成都
- 主办单位：中国声学学会微声学分会、中国声学学会物理声学分会、陕西省声学学会、浙江省声学学会、山东省声学学会、上海市声学学会、黑龙江省声学学会、水声技术重点实验室、重庆市声学学会、西安市声学学会、四川省声学学会
- 学会名称：《声学技术》编辑部
- 页数：5
- 文件大小：1570k
- 原文格式：D
- 会议级别：全国
摘要
理论和实验数据表明,声速剖面的展开基系数与等温线具有类似的功率谱,这为构建浅海随机内波环境确定了新的思路。在浅海区域,内波环境下的声速剖面展开基可以由内波模态函数获取,而其基系数则可以根据设定好的功率谱(主观设定或者测量结果)产生,由此便可以构建内波环境。此种方法只需要一个背景温度剖面以及设定的功率谱,就可以产生满足设定功率谱特性的线性内波,具有需要的先验参数少,使用灵活的特点。
The theoretical and experimental analyses indicate that the expansion coefficients of the sound speed profiles have a similar power spectrum to that of isotherms, which provides a new way of generating random internal waves in shallow water environment. In shallow water area, the expansion base of the sound speed profile under the environment of internal waves can be obtained from the internal wave's modal function, and the base coefficients can be generated according to a predetermined power spectrum(arbitrary or experiment data), then the internal wave environment is constructed.This method only requires one background temperature profile and one predetermined power spectrum, then wecan generate linear internal waves meeting the predeterminedone. The method don't need much priori parameters, and it is very flexible.
The theoretical and experimental analyses indicate that the expansion coefficients of the sound speed profiles have a similar power spectrum to that of isotherms, which provides a new way of generating random internal waves in shallow water environment. In shallow water area, the expansion base of the sound speed profile under the environment of internal waves can be obtained from the internal wave's modal function, and the base coefficients can be generated according to a predetermined power spectrum(arbitrary or experiment data), then the internal wave environment is constructed.This method only requires one background temperature profile and one predetermined power spectrum, then wecan generate linear internal waves meeting the predeterminedone. The method don't need much priori parameters, and it is very flexible.
引文
[1]王宁,张海青,王好忠,高大治,内波、潮导致的声简正波幅度起伏及其深度分布[J],声学学报,2010.1,第35卷第1期,P38-P44
[2]GARRETT C,MUNK W.Space-time scales of internal waves[J].Geophysical&Astrophysical Fluid Dynamics,1972,3(1):225-64.
[3]GARRETT C,MUNK W.Space‐time scales of internal waves:A progress report[J].Journal of Geophysical Research,1975,80(3):291-7.
[4]GARRETT C,MUNK W.Internal waves in the ocean[J].Annual Review of Fluid Mechanics,1979,11(1):339-69.
[5]T.C.Yang and Kwang Yoo,Internal Wave Spectrum in Shallow Water:Measurement and Comparison with the Garrett–Munk Model[J],IEEE JOURNAL OF OCEANIC ENGINEERING,VOL.24,NO.3,JULY 1999,P333-P345
[6]John A.Colosi,Michael G.Brown,Efficient numerical simulation of stochastic internal-waveinduced sound-speed perturbation fields,J.Acoust.Soc.Am.1998,103(4):2232-2235
[7]Casagrande G,Stephan Y,Varnas A C W,et al.A novel empirical orthogonal function(EOF)-based methodology to study the internal wave effects on acoustic propagation[J].Oceanic Engineering,IEEE Journal of,2011,36(4):745-759.
[8]Del Grosso V A.New equation for the speed of sound in natural waters(with comparisons to other equations)[J].The Journal of the Acoustical Society of America,1974,56(4):1084-1091.
[9]宋文华,胡涛,郭圣明,等.一种声速剖面展开的正交基函数获取方法[J].声学学报,2014,39(1):11-18.
[2]GARRETT C,MUNK W.Space-time scales of internal waves[J].Geophysical&Astrophysical Fluid Dynamics,1972,3(1):225-64.
[3]GARRETT C,MUNK W.Space‐time scales of internal waves:A progress report[J].Journal of Geophysical Research,1975,80(3):291-7.
[4]GARRETT C,MUNK W.Internal waves in the ocean[J].Annual Review of Fluid Mechanics,1979,11(1):339-69.
[5]T.C.Yang and Kwang Yoo,Internal Wave Spectrum in Shallow Water:Measurement and Comparison with the Garrett–Munk Model[J],IEEE JOURNAL OF OCEANIC ENGINEERING,VOL.24,NO.3,JULY 1999,P333-P345
[6]John A.Colosi,Michael G.Brown,Efficient numerical simulation of stochastic internal-waveinduced sound-speed perturbation fields,J.Acoust.Soc.Am.1998,103(4):2232-2235
[7]Casagrande G,Stephan Y,Varnas A C W,et al.A novel empirical orthogonal function(EOF)-based methodology to study the internal wave effects on acoustic propagation[J].Oceanic Engineering,IEEE Journal of,2011,36(4):745-759.
[8]Del Grosso V A.New equation for the speed of sound in natural waters(with comparisons to other equations)[J].The Journal of the Acoustical Society of America,1974,56(4):1084-1091.
[9]宋文华,胡涛,郭圣明,等.一种声速剖面展开的正交基函数获取方法[J].声学学报,2014,39(1):11-18.