文章摘要
陈晶晶,邹彬彬,郭英歌.参量阵声源波束宽度影响因素分析[J].声学技术,2020,39(4):400~405
参量阵声源波束宽度影响因素分析
Analysis of influencing factors on beam width of parametric acoustic array source
投稿时间:2019-05-13  修订日期:2019-06-16
DOI:10.16300/j.cnki.1000-3630.2020.04.003
中文关键词: 参量阵  波束宽度  Westervelt理论  KZK方程
英文关键词: parametric acoustic array (PAA)  beam width  Westervelt theory  KZK equation
基金项目:中国科学院声学研究所率先计划项目(SXJH201610)、中国科学院声学研究所青年英才项目(QNYC201827)
作者单位E-mail
陈晶晶 中国科学院声学研究所东海研究站, 上海 201815 cjj@mail.ioa.ac.cn 
邹彬彬 中国科学院声学研究所东海研究站, 上海 201815  
郭英歌 中国科学院声学研究所东海研究站, 上海 201815  
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中文摘要:
      波束宽度是衡量参量阵声呐性能的重要技术指标之一,在设计时应该对其正确掌握,以保证整机性能.文章以圆形活塞换能器形成的参量阵声场为例,利用维斯特维尔特(Westervelt)理论和Khokhlov-Zabolotskaya-Kuznetsov(KZK)方程分别计算了参量阵声场波束宽度,通过试验验证了KZK数值计算用于分析波束宽度的准确性及对远近场的适应性,并指出利用Westervelt理论计算参量阵声源波束宽度的不足。然后通过仿真,分别分析了频率、吸收系数、阵长与参量阵波束宽度间的关系,并从物理意义上解释了阵长对参量阵声场波束宽度的影响。
英文摘要:
      Beam width is one of important technical indexes to measure the performance of parametric acoustic array (PAA). The PAA's beam width should be calculated correctly in designing to ensure the performance of whole system. Taking the PAA formed by a circular piston transducer as an example, the Westervelt theory and the Khokhlov-Zabolotskaya-Kuznetsov (KZK) equation are used to calculate the PAA's beam width respectively. The accuracy of the numerical calculation of KZK equation in analyzing beam-width and its adaptability to far and near fields is verified by experimental results. The shortcoming of the Westervelt's formula for beam width calculation is indicated. By simulation, the relationships between the PAA's beam width and the frequency, absorption and array length are analyzed, and the influence of PAA's length on its beam width is explained in the physical sense.
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