双壳嵌套鱼唇式弯张换能器

研究了一种双壳嵌套鱼唇式弯张换能器,针对特殊结构的空气背衬弯张换能器提出了表征换能器静压形变的系列参数,利用有限元方法研究了这些参数与结构参数的对应关系,并进行了换能器的静态分析。在静态分析基础上,研究了结构参数对换能器声辐射特性的影响,经对比分析得到换能器的优化方案,研制了实验样机,经外场试验验证了双壳嵌套鱼唇式弯张换能器具有小尺寸、频率低、高效率、大功率的工作特性:谐振频率800 Hz、最大声源级199.5 dB、电声效率23.6%、工作深度200 m。 

Fish-Mouth flextensional transducer with nested double shells

A Fish-Mouth flextensional transducer with nested double shells is presented.The hydrostatic analysis is done at first.A series of characteristic parameters which could represent the hydrostatic deformation for the air-backed flextensional transducer with special structure are summarized.The relationship between them and the structural parameters is studied in detail by finite element analysis.On the basis of the hydrostatic design,the optimization research on the electroacoustic performance of the transducer is carried out and the optimal structural parameters are determined.Then a prototype is manufactured and measured.It is shown that this projector could achieve low frequency,high power and high efficiency performance from compact size by both the simulated and experimental results.The maximum sound level reaches to 199.5 dB at the resonant frequency of 800 Hz with an electro-acoustical efficiency of 23.6%.and the effective working depth is no less than 200 m.