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Advantage analysis of PMN–PT material for free-flooded ring transducers |
| He Zheng-Yao(何正耀)† and Ma Yuan-Liang(马远良) |
| Institute of Acoustic Engineering, Northwestern Polytechnical University, Xi'an 710072, China |
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Abstract 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° and that of the transducer made of PMN—PT at the resonant frequency 1000 Hz is 64.6°. 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.
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Received: 02 November 2010
Revised: 18 March 2011
Accepted manuscript online:
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PACS:
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43.30.Yj
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(Transducers and transducer arrays for underwater sound; transducer calibration)
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43.20.Rz
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(Steady-state radiation from sources, impedance, radiation patterns, boundary element methods)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 60901076 and 10734030), the Northwestern Polytechnical University (NPU) Foundation for Fundamental Research (Grant No. NPU-FFR-JC200805), Special Funded Project of the China Postdoctoral Science Foundation (Grant No. 200902604), the China Postdoctoral Science Foundation Funded Project (Grant No. 20080431248), and the Hovering Star Plan of Northwestern Polytechnical University. |
Cite this article:
He Zheng-Yao(何正耀) and Ma Yuan-Liang(马远良) Advantage analysis of PMN–PT material for free-flooded ring transducers 2011 Chin. Phys. B 20 084301
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