空气中声源激发水下声场的水平纵向相关性

发布时间：2018-03-02 16:50

本文选题：简正波　切入点：中和水　出处：《声学学报》2017年05期 　论文类型：期刊论文

【摘要】：声场的空间相关特性是声场的重要特征,对水下探测、水声通讯等各种设备在实际海洋环境中应用的参数选择具有重要意义,是水声工程技术研究的重要基础之一。相比于水中声源激发声场的相关特性研究,空气中声源的相关研究很少。本文推导了空气中声源激发水下声场的水平纵向相关的简正波表达式,并通过数值仿真分析,比较了声源分别位于空气中和水中时水下声场的水平纵向相关特性。对南海海域进行的一次悬挂汽笛空气声源、海底水平阵接收信号海上实验获得的数据进行分析,结果表明:空气中声源位于不同距离时,其发射的声信号激发水下声场的水平纵向相关均存在明显的起伏结构,基于本文提出的空气中声源激发水下声场的水平纵向相关系数的简正波表达式能够较好地解释该现象.
[Abstract]:The spatial correlation characteristic of sound field is an important feature of sound field. It is of great significance for the selection of parameters of underwater detection, underwater acoustic communication and other equipment applied in the actual marine environment. It is one of the important foundations of underwater acoustic engineering technology. Compared with the research on the characteristics of acoustic field excited by underwater acoustic source, The correlation between sound sources in air is seldom studied. In this paper, the expression of vertical and horizontal correlation wave of underwater sound field excited by sound source in air is derived, and the numerical simulation analysis is carried out. The horizontal longitudinal correlation characteristics of underwater sound field with sound sources in air and in water are compared. The data obtained from sea experiments of a hoisting siren air source in the South China Sea area and horizontal array reception signals at sea are analyzed. The results show that when the sound source is located at different distances in the air, the horizontal and longitudinal correlation of the acoustic field excited by the acoustic signal emitted by the acoustic source is obviously fluctuating. The normal wave expression of horizontal longitudinal correlation coefficient of underwater acoustic field excited by sound source in air can explain this phenomenon well.
【作者单位】：声场声信息国家重点实验室(中国科学院声学研究所);中国科学院大学;
【基金】：国家自然科学基金项目(11434012,41561144006) 海洋公益性行为科研专项经费项目(201405032)资助
【分类号】：O42

【相似文献】