文章摘要
侯玉敏,毛卫宁.刚性曲面障板散射对多模球形水听器测向的影响[J].声学技术,2005,(2):94~97,124
刚性曲面障板散射对多模球形水听器测向的影响
Effect of acoustic scattering from curved rigid surfaces on direction-finding of multimode spherical hydrophone
投稿时间:2004-05-12  修订日期:2004-08-26
DOI:
中文关键词: 多模球形水听器  板块元法  曲面障板  散射  测向
英文关键词: multimode spherical hydrophone  planar elements method  curved surfaces  scattering  direction-finding .
基金项目:
作者单位
侯玉敏 东南大学无线电工程系, 南京, 210096 
毛卫宁 东南大学无线电工程系, 南京, 210096 
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中文摘要:
      文章将板块元法应用于收-发分置时近场散射声场的计算,讨论了存在刚性曲面障板时障板散射对多模球形水听器测向的影响。研究结果表明,刚性曲面障板会使水听器在某些方位出现较大的测向误差,此时目标信号频率和俯仰角变化也会对测向产生较大的影响。存在刚性曲面障板时,等效声中心不对称对测向误差的影响较小,而等效声中心不共面对测向误差的影响要比不对称时明显得多。
英文摘要:
      The near field of acoustic scattering from curved rigid surfaces can be calculated using the planar element method with the transmitter and receiver placed separately The effect of scattering on direction-finding of multimode spherical hydrophones is discussed The results indicate that scattering from curved rigid surfaces can cause large errors in some azimuths,meanwhile changes in frequency and elevation of the incident plane acoustic waves also have large influence on direction-finding The influence of non-coplanarity of equivalent acoustic centers upon direction finding is greater than that due to asymmetry when curved rigid surfaces exist.
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