| 叠合结构超低频弯张换能器 |
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| 引用本文： | 刘永平,莫喜平,张运强,崔斌,蔡海荣.叠合结构超低频弯张换能器[J].声学学报,2022,47(3):372-378. |
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| 作者姓名： | 刘永平 莫喜平 张运强 崔斌 蔡海荣 |
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| 作者单位： | 1. 哈尔滨工程大学 水声工程学院 哈尔滨 150001; |
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| 摘 要： | 研究了一种将多个椭圆弯张壳体在短轴方向进行机械叠合的超低频弯张换能器,每个弯张壳体采用超磁致伸缩材料进行驱动。推导了多个叠合壳体的等效电路,利用支路阻抗方法得到了换能器频率和阻抗的方程表达式。针对多个壳体叠合的结构复杂性,采用有限元方法计算并分析了叠合壳体换能器的多个结构点的振动位移分布,通过平动位移分布设计了活塞辐射面的结构参数。将有限元方法计算的换能器在空气中和水中的谐振频率与等效电路法计算的结果进行了对比,符合较好。研制了6个壳体叠合的超低频弯张换能器样机,换能器外形尺寸为Φ230×630 mm,重量为39 kg。换能器经湖上试验,水中谐振频率130 Hz,最大发送电流响应161.1 dB,最大发射声源级为180.4 dB,实现了超低频、小尺寸的发射能力。
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| 关 键 词： | 弯张换能器 叠合结构 超磁致伸缩材料 超低频 子结构 |
| 收稿时间： | 2021-11-26 |
An ultra-low frequency flextensional transducer with multiple elliptical flextensional shells |
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| Affiliation: | 1. College of Underwater Acoustic Engineering, Harbin Engineering University Harbin 150001;2. Institute of Acoustics, Chinese Academy of Sciences Beijing 100190;3. Acoustic Science and Technology Laboratory, Harbin Engineering University Harbin 150001 |
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| Abstract: | An ultra-low frequency flextensional transducer with multiple elliptical flextensional shells mechanically cascaded in the direction of the short axis is studied,and each flextensional shell is driven by giant magnetostrictive materials.The equivalent circuit of multiple cascaded shells is deduced,and the frequency and impedance equations of the transducer obtained by using the branch impedance method.Because of the structural complexity of the multiple cascaded shells,the finite element method is used to calculate the vibrating displacements of multiple structural points of the transducer.Through the translational displacement distribution,the structural parameters of the piston are optimized.The resonant frequencies of the transducer in the air and water are compared with the results calculated by the finite element method and the equivalent circuit method,and the calculated results are in good agreement.A prototype of ultra-low frequency flextensional transducer with 6 cascaded shells has been developed.The external dimension of the transducer isΦ230 x630 mm and the weight is 39 kg.The test result shows that the resonance frequency of the transducer in water is 130 Hz and the maximum transmitting current response is 161.1 dB.The maximum sound source level is 180.4 dB.The results described above show that the transducer has a good capability of transmitting ultra-low frequency underwater sound with small size. |
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