| 外液腔式Janus-Helmholtz水声换能器 |
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| 引用本文： | 桑永杰,蓝宇,吴彤,丁玥文.外液腔式Janus-Helmholtz水声换能器[J].声学学报,2017,42(4):397-402. |
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| 作者姓名： | 桑永杰 蓝宇 吴彤 丁玥文 |
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| 作者单位： | 1. 哈尔滨工程大学 水声技术重点实验室 哈尔滨 150001; |
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| 基金项目： | 国家自然科学基金项目(11304057)水声技术重点实验室开放基金项目(SSKF2015001)资助 |
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| 摘 要： | 为获得具有大功率无指向性发射特性的水声换能器,提出了一种外液腔式Janus-Helmholtz结构。通过设置隔声层改变换能器的声辐射模式,从而改善声辐射效率和无指向性方向的声辐射能力,并利用外液腔振动和Janus换能器纵向振动耦合实现宽带发射。基于有限元法设计了一只工作频段为1.1~3.5 kHz的外液腔式Janus-Helmholtz换能器试验样机。样机测试结果显示与设计结果符合得较好,与内液腔式相比,外液腔式Janus-Helmholtz水声换能器在0°方向的声辐射能力得到了显著改善。
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| 关 键 词： | Janus-Helmholtz换能器 辐射效率 指向性 声辐射模式 |
| 收稿时间： | 2016-01-01 |
Outer cavity Janus-Helmholtz underwater acoustic transducer |
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| Institution: | 1. Acoustic Science and Technology Laboratory, Harbin Engineering University Harbin 150001;2. College of Underwater Acoustic Engineering, Harbin Engineering University Harbin 150001 |
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| Abstract: | The outer cavity Janus-Helmholtz with sound insulating layer is presented for obtaining the capacity of high-power non-directional transmitting. The radiation efficiency and directivity in the 0 degree direction can be improved when the radiation mode is changed by laying sound insulation layer. The operating bandwidth can be expanded effectively by the dual mode coupling between the fluid cavity vibration and longitudinal vibration of Janus transducer. A prototype that operate band between 1.1 kHz and 3.5 kHz is designed by the finite element method. Test results show that the results are in good agreement with the design. Compared with the inner cavity, acoustic radiation ability of outer cavity Janus-Helmholtz underwater acoustic transducer in the 0 degree direction has been significantly improved. |
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