摘要
锚泊舰船作为近场平台时,所搭载的声压阵受其影响较大,无法正常工作。为研究其原因,采用矢量水听器阵探明近场锚泊舰船的噪声形成机制。基于简正波的矢量场理论,采用多个点声源声能流的相互作用对近场舰船噪声进行建模,得到了不同接收点处声能流的水平方向性。仿真结果与海上试验结果均表明,同一接收点处声能流在水平面上的方向均随频率变化,不同接收点处声能流随频率变化情况不同。说明舰船锚泊时的噪声主要由海浪拍打船舷产生,所建立的噪声模型的仿真与海上试验结果趋势一致。2个接收点水平相距2.25 m时,所反映的近场舰船水平方向性不同,这是近场舰船干扰下使用声压阵波束形成方法对远场目标进行DOA估计时的性能大幅降低的主要原因。
When the near-field platform is a mooring ship, the noise is emitted mostly from the smack of waves against the side of the ship. The model of the noise of near-filed platform in shallow sea and in a coastal area is established by layered media mode theory in the particle velocity field. The horizontal azimuth of acoustic energy flow of noise of nearfiled platform with vector hydrophone array is presented, which is changed with frequency and is similar to the investigations by vector sensor array at sea. Investigations of two array elements with the distance of 2.25 m demonstrate that the horizontal azimuth varies with the location of array elements, which is the reason that DOA（destination of arrival） estimation of sonar array by beam forming method is affected.
作者
侯文姝
笪良龙
HOU Wen-shu;DA Liang-long(Navy Submarine Academy, Qingdao 266199, China)
出处
《舰船科学技术》
北大核心
2018年第5期105-109,共5页
Ship Science and Technology
关键词
方位估计
声矢量水听器
声能流
azimuth estimation
acoustic vector hydrophones
acoustic energy flow
