Cymbal单元的薄型低频宽带水声发射换能器设计

A Cymbal transducer based low frequency broadband thin panel underwater acoustic projector

为了研究安装方便、便于携带的薄型低频发射换能器,使用有限元法对Cymbal换能器单元的设计结构进行了仿真分析,并将换能器单元的谐振频率与实际测量值进行了比较.将Cymbal换能器单元进行阵列,设计了一种新型的低于10 kHz薄板型水声发射换能器,对一个厚度为25 mm、辐射面积78.5 cm2的薄板发射换能器实验模型进行了测量与标定.研究结果表明,通过阵列Cymbal换能器单元构建的发射换能器是一种工作在10 kHz以下的薄型低频宽带水声换能器,其发射声源级比尺寸类似的1-3型压电复合材料换能器高20 dB.

The geometry of cymbal transducer elements was analyzed using the finite element method. The frequency generated by the cymbal element was compared with actually measured values. A new thin panel underwater sound projector suitable for use at frequencies below 10 kHz was designed as an array of cymbal elements. The prototype was developed as a calibrated planar cymbal transducer array whose thickness was 25 mm with a radiating area of 78.5 cm^2. It was shown that projectors built of an array of cymbal elements are thin, low frequency, broadband and can be used as a high power underwater acoustic transducer with a working frequency below 10 kHz. The transmitting voltage response of the thin-panel projector was 20 dB higher than a 1-3 piezo-composite material of the same size.