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  本文選題：淺海　切入點：聲矢量場　出處：《哈爾濱工程大學》2014年碩士論文　論文類型：學位論文

【摘要】：研究聲在海洋中的傳播,是理解與預測各種水聲現(xiàn)象的基礎,也是實現(xiàn)目標估計與探測等聲吶活動的前提。相對于傳統(tǒng)的聲壓信號處理方法,聲壓與振速聯(lián)合處理的信號處理能夠提供更多的聲場信息。但是目前大部分聲場模型都是標量場模型,只能提供聲壓場場信息而不提供振速場信息,本文將給出一種聲矢量場模型。本文基于簡正波理論建立淺海水平分層海洋環(huán)境下聲矢量場模型,并和拋物模型進行對比,驗證了模型的有效性,在建立模型基礎上分析了淺海聲矢量場傳播規(guī)律,重點研究了聲矢量場傳播損失以及聲能量的空間分布規(guī)律。在建立的模型基礎上進行聲矢量場空間相關性仿真與分析,研究了海洋環(huán)境參數(shù)對淺海聲矢量場空間相關性的影響。其次,本文還利用拋物理論建立了傾斜海底環(huán)境下的聲矢量場模型,分析了海底地形對聲矢量場的影響。最后還基于拋物模型研究了傾斜海底環(huán)境下聲矢量場空間相關特性,給出了不同海底地形下聲矢量場空間相關性仿真。
[Abstract]:The study of sonar propagation in the ocean is the basis for understanding and predicting all kinds of underwater acoustic phenomena, and is also the prerequisite for the realization of sonar activities such as target estimation and detection. The signal processing of the combination of sound pressure and vibration velocity can provide more sound field information, but at present most of the sound field models are scalar field models, which can only provide sound pressure field information but not vibration velocity field information. In this paper, a model of acoustic vector field is given. Based on the theory of normal wave, the model of acoustic vector field in shallow sea horizontal stratified ocean environment is established, and compared with the parabolic model, the validity of the model is verified. Based on the model, the propagation law of acoustic vector field in shallow water is analyzed, and the loss of acoustic vector field and the spatial distribution of acoustic energy are studied. The simulation and analysis of spatial correlation of acoustic vector field are carried out on the basis of the established model. The influence of ocean environmental parameters on the spatial correlation of acoustic vector field in shallow sea is studied. Secondly, the acoustic vector field model in inclined seabed environment is established by using parabolic theory. Finally, based on the parabolic model, the spatial correlation characteristics of the acoustic vector field in the inclined submarine environment are studied, and the simulation of the spatial correlation of the acoustic vector field under different submarine terrain is given.
【學位授予單位】：哈爾濱工程大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：P733.21

【參考文獻】

相關期刊論文 前10條

1 高博;樸勝春;楊士莪;;淺海遠程海底混響的空間相關特性分析[J];哈爾濱工程大學學報;2012年08期

2 張海剛;楊士莪;樸勝春;任群言;馬樹青;;聲矢量場計算方法[J];哈爾濱工程大學學報;2010年04期

3 畢傳興;張永斌;徐亮;陳心昭;;基于聲壓-振速測量的平面近場聲全息實驗研究[J];物理學報;2010年02期

4 魏來;周穗華;張靜遠;;基于射線方法的淺海近程聲傳播仿真與應用[J];魚雷技術;2009年05期

5 馬樹青;任群言;樸勝春;楊士莪;;聲矢量場的拋物方程計算方法[J];哈爾濱工程大學學報;2009年07期

6 郭熙業(yè);蘇紹t，

本文編號：1613158