深远海线性内波条件下声场时间相关性的空间分布
发布时间：2019-06-09 13:42
【摘要】：深海声场特定的干涉结构导致其时间相关性的空间起伏,研究这种空间特性可以为水声信号的探测与处理提供重要参考。利用抛物方程声场仿真模型,联合Monte-Carlo数值方法计算分析了深远海线性内波条件下声场时间相关性的空间分布特性。与现有的研究相比,给出了时间相关性的距离和深度起伏特征。结果表明,当接收达到一定距离,声场时间相关性的空间分布具有与声场干涉条纹类似的结构,声场干涉越强,时间相关性越好。此外,声源频率和声速标准差的变化会引起时间相关性空间分布规律的改变,且会聚区传播模式下的改变强于深海声道传播模式。
[Abstract]:The special interference structure of deep sea sound field leads to the spatial fluctuation of its time correlation. The study of this spatial characteristic can provide an important reference for the detection and processing of underwater acoustic signal. The spatial distribution characteristics of the temporal correlation of the sound field under the condition of far-reaching sea linear internal waves are calculated and analyzed by using the parabolic equation sound field simulation model and the Monte-Carlo numerical method. Compared with the existing research, the distance and depth fluctuation characteristics of time correlation are given. The results show that when the reception reaches a certain distance, the spatial distribution of the time correlation of the sound field has a structure similar to that of the interference fringes of the sound field, and the stronger the interference of the sound field is, the better the time correlation is. In addition, the variation of sound source frequency and sound velocity standard deviation will change the spatial distribution of time correlation, and the change of propagation mode in convergence area is stronger than that in deep sea channel propagation mode.
【作者单位】： 农业部海洋渔业可持续发展重点实验室中国水产科学研究院黄海水产研究所;中国海洋大学海洋技术系;
【基金】：国家自然科学基金项目(11474258,11674293,40976019)资助
【分类号】：P733.2
，
本文编号：2495594
[Abstract]:The special interference structure of deep sea sound field leads to the spatial fluctuation of its time correlation. The study of this spatial characteristic can provide an important reference for the detection and processing of underwater acoustic signal. The spatial distribution characteristics of the temporal correlation of the sound field under the condition of far-reaching sea linear internal waves are calculated and analyzed by using the parabolic equation sound field simulation model and the Monte-Carlo numerical method. Compared with the existing research, the distance and depth fluctuation characteristics of time correlation are given. The results show that when the reception reaches a certain distance, the spatial distribution of the time correlation of the sound field has a structure similar to that of the interference fringes of the sound field, and the stronger the interference of the sound field is, the better the time correlation is. In addition, the variation of sound source frequency and sound velocity standard deviation will change the spatial distribution of time correlation, and the change of propagation mode in convergence area is stronger than that in deep sea channel propagation mode.
【作者单位】： 农业部海洋渔业可持续发展重点实验室中国水产科学研究院黄海水产研究所;中国海洋大学海洋技术系;
【基金】：国家自然科学基金项目(11474258,11674293,40976019)资助
【分类号】：P733.2
，
本文编号：2495594
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