文章摘要
刘望生,俞宏沛,周利生.双激励加匹配层宽带水声换能器研究[J].声学技术,2008,(2):283~286
双激励加匹配层宽带水声换能器研究
The study of broadband underwater acoustic transducer with doubly exciting plus a matching layer
投稿时间:2007-03-30  修订日期:2007-07-23
DOI:
中文关键词: 双激励  匹配层  三谐振  宽带
英文关键词: doubly exciting  matching layer  triple resonant  broadband
基金项目:
作者单位
刘望生 杭州应用声学研究所, 杭州, 310012 
俞宏沛 杭州应用声学研究所, 杭州, 310012 
周利生 杭州应用声学研究所, 杭州, 310012 
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中文摘要:
      采用双激励加匹配层来拓宽换能器的工作频带。利用有限元方法分析了双激励加匹配层换能器在空气中的振动模态,研究了这些模态在水中随几何尺寸以及匹配层材料参数变化的规律,并设计和制作了一种新型三谐振宽带换能器。与双激励或单匹配层换能器相比,增加了近一个倍频程的有效工作带宽,且频带内的响应起伏较平坦。其工作带宽为15kHz~42.5kHz,频带内发送电压响应的起伏为±3dB。
英文摘要:
      The bandwidth of a transducer is increased by doubly exciting with a matching layer.The vibrating modes of the transducer with doubly exciting plus a matching layer in air are analyzed by using finite element method(FEM),and variations of modes with its geometry size and the matching layer material in water are studied.A new triple resonant broadband transducer is designed and made to attain an increase of almost one octave bandwidth and the fluctuation within bandwidth is relatively flat in con-trast with only doubly exciting or only a single matching layer.The bandwidth of the transducer is 15 kHz~42.5 kHz and the TVR fluctuation within bandwidth is ±3 dB.
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