海洋信道中声矢量场建模

发布时间：2018-03-14 22:13

本文选题：浅海　切入点：声矢量场　出处：《哈尔滨工程大学》2014年硕士论文　论文类型：学位论文

【摘要】：研究声在海洋中的传播,是理解与预测各种水声现象的基础,也是实现目标估计与探测等声呐活动的前提。相对于传统的声压信号处理方法,声压与振速联合处理的信号处理能够提供更多的声场信息。但是目前大部分声场模型都是标量场模型,只能提供声压场场信息而不提供振速场信息,本文将给出一种声矢量场模型。本文基于简正波理论建立浅海水平分层海洋环境下声矢量场模型,并和抛物模型进行对比,验证了模型的有效性,在建立模型基础上分析了浅海声矢量场传播规律,重点研究了声矢量场传播损失以及声能量的空间分布规律。在建立的模型基础上进行声矢量场空间相关性仿真与分析,研究了海洋环境参数对浅海声矢量场空间相关性的影响。其次,本文还利用抛物理论建立了倾斜海底环境下的声矢量场模型,分析了海底地形对声矢量场的影响。最后还基于抛物模型研究了倾斜海底环境下声矢量场空间相关特性,给出了不同海底地形下声矢量场空间相关性仿真。
[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.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P733.21

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