【摘要】：深海聲場特定的干涉結(jié)構(gòu)導致其時間相關(guān)性的空間起伏,研究這種空間特性可以為水聲信號的探測與處理提供重要參考。利用拋物方程聲場仿真模型,聯(lián)合Monte-Carlo數(shù)值方法計算分析了深遠海線性內(nèi)波條件下聲場時間相關(guān)性的空間分布特性。與現(xiàn)有的研究相比,給出了時間相關(guān)性的距離和深度起伏特征。結(jié)果表明,當接收達到一定距離,聲場時間相關(guān)性的空間分布具有與聲場干涉條紋類似的結(jié)構(gòu),聲場干涉越強,時間相關(guān)性越好。此外,聲源頻率和聲速標準差的變化會引起時間相關(guān)性空間分布規(guī)律的改變,且會聚區(qū)傳播模式下的改變強于深海聲道傳播模式。
[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.
【作者單位】： 農(nóng)業(yè)部海洋漁業(yè)可持續(xù)發(fā)展重點實驗室中國水產(chǎn)科學研究院黃海水產(chǎn)研究所;中國海洋大學海洋技術(shù)系;
【基金】：國家自然科學基金項目(11474258,11674293,40976019)資助
【分類號】：P733.2
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本文編號：2495594