Advantage analysis of PMN-PT material for free-flooded ring transducers
Advantage analysis of PMN-PT material for free-flooded ring transducers
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自由浸没环形传感器PMN-PT材料的优势分析
DOI：
10.1088/1674-1056/20/8/084301
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发表时间：
2011-08-01
影响因子：
1.7
通讯作者：
Ma Yuan-Liang
中科院分区：
文献类型：
--
作者：
He Zheng-Yao;Ma Yuan-Liang
计算比较了PZT4和PMN-PT两种材料的自由泛水环形换能器的声辐射特性。首先，研究了自由泛水环形换能器的理论公式。计算了由PZT4和PMN-PT材料制成的换能器的谐振频率。然后，用有限元法计算了自由泛水环形换能器的发射电压响应。最后，利用边界元法计算了自由泛水环形换能器的声辐射特性。计算结果表明，与相同尺寸的PZT4相比，PMN-PT制成的自由泛水环形换能器的谐振频率大大降低。PMN-PT制成的换能器的发射电压响应远高于PZT4制成的换能器。计算得到PZT4自由泛水环形换能器在谐振频率1900 Hz时声辐射远场指向性的3db波束宽度为63.6度。PMN-PT制成的换能器在谐振频率为1000 Hz时的频率为64.6度。对比结果表明，PMN-PT材料制备的自由泛水环形换能器比PZT4材料制备的具有许多优点。PMN-PT是一种很有前途的材料，可以改善自由泛水环形换能器的性能。
The acoustic radiation characteristics of free-flooded ring transducers made of PZT4 and PMN-PT materials are calculated and compared. First, the theoretical formulae for free-flooded ring transducers are studied. The resonant frequencies of a transducer made of PZT4 and PMN-PT materials are calculated. Then, the transmitting voltage responses of the free-flooded ring transducers are calculated using the finite element method. Finally, the acoustic radiation characteristics of the free-flooded ring transducers are calculated using the boundary element method. The calculated results show that the resonant frequencies of the free-flooded ring transducer made of PMN-PT are greatly reduced compared with those made of PZT4 with the same size. The transmitting voltage response of the transducer made of PMN-PT is much higher than that of the transducer made of PZT4. The calculated 3-dB beamwidth of the acoustic radiated far-field directivity of the free-flooded ring transducer made of PZT4 at the resonant frequency 1900 Hz is 63.6 degrees. and that of the transducer made of PMN-PT at the resonant frequency 1000 Hz is 64.6 degrees. The comparison results show that the free-flooded ring transducer made of PMN-PT material has many advantages over that made of PZT4. The PMN-PT is a promising material for improving the performance of free-flooded ring transducers.