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。
The bandwidth of a transducer is increased by doubly exciting with a matching layer. The vi- brating 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 studiecd. 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 fiat in contrast 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.
出处
《声学技术》
CSCD
北大核心
2008年第2期283-286,共4页
Technical Acoustics
关键词
双激励
匹配层
三谐振
宽带
doubly exciting
matching layer
triple resonant
broadband
作者简介
刘望生（1974-），男，湖北人，博士研究生，研究方向为宽带水声换能器。通讯作者：刘望生，E—mail：lwsh22@hotmail．com
