| 浅海舰船噪声声强流的垂直方向性 |
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| 引用本文： | 侯文姝,笪良龙,孙芹东,王文龙.浅海舰船噪声声强流的垂直方向性[J].应用声学,2017,36(1):73-80. |
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| 作者姓名： | 侯文姝 笪良龙 孙芹东 王文龙 |
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| 作者单位： | 海军潜艇学院 青岛 266071,海军潜艇学院 青岛 266071,海军潜艇学院 青岛 266071,海军潜艇学院 青岛 266071 |
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| 摘 要： | 浅海环境中,确定性声源的多途声信号干涉使得接收点处声强流的方向发生改变,不再与声源位置处的声强流方向一致。只测量声场的标量声强时,无法得到接收点处声强流的垂直方向性,而基于简正波矢量场建模和仿真,可获得理想条件下宽带点声源激发声场声强流的垂直方向性。本文采用单矢量水听器进行海上实验,获得了海洋环境噪声和干扰条件下舰船噪声声强流的垂直方向性。仿真和实验结果表明:远场条件下,浅海干涉现象引起接收点处声强流的方向(极角)随频率和距离变化,其时间-频率分布呈现与LOFAR谱干涉条纹相似的条纹,声强流的极角值主要分布在70?～110?范围内。
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| 关 键 词： | 舰船噪声 声矢量水听器 声强流 |
| 收稿时间： | 2016/3/14 0:00:00 |
| 修稿时间： | 2016/12/22 0:00:00 |
Vertical direction of acoustic intensity flux of ship noise in shallow sea |
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| HOU Wenshu,DA Lianglong,SUN Qindong and WANG Wenlong.Vertical direction of acoustic intensity flux of ship noise in shallow sea[J].Applied Acoustics,2017,36(1):73-80. |
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| Authors: | HOU Wenshu DA Lianglong SUN Qindong and WANG Wenlong |
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| Affiliation: | Navy Submarine Academy,Navy Submarine Academy,Navy Submarine Academy,Navy Submarine Academy |
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| Abstract: | The interference of multi-path signal from deterministic acoustic source in shallow sea changes the vertical direction of sound intensity flux at the receiving point, which is not the same with the direction of acoustic source. The measuring of acoustic intensity in pressure field cannot provide the vertical direction of acoustic intensity. The vertical direction of acoustic intensity of wideband particle source under ideal conditions is shown by simulation vector field of normal modes. The vertical direction of sound intensity flux of ship noise under ambient noise and interference is shown by single acoustic vector hydrophones in sea trial. The results of simulation and experiment show that, in far field condition, the interference phenomenon in shallow sea causes the vertical direction of acoustic intensity at the receiving point changing with frequency and distance, and the time and frequency distribution appear the fringe which is similar with the interference fringe in LOFAR figure. The polar angle which represents the vertical direction of acoustic intensity is between 70o and 110o. |
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| Keywords: | Ship noise Acoustic vector hydrophones Acoustic intensity flux |
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