【作者】 杜慧如； 莫喜平； 刘永平；

【Author】 Du Hui-ru;Mo Xi-ping;Liu Yong-ping;Institute of Acoustics,Chinese Academy of Sciences;University of Chinese Academy of Sciences;Beijing Engineering Technology Research Center of Ocean Acoustic Equipment;

【机构】 中国科学院声学研究所； 中国科学院大学； 北京海洋声学装备工程技术研究中心；

【摘要】 本文提出了一种半空间宽波束指向性柱型换能器,基于4只纵向振子,通过模态叠加原理实现波束控制。利用有限元分析软件ANSYS对预想的换能器进行建模仿真,得出导纳、发射电压响应和指向性等重要的参数,其中单极子和偶极子在水中的谐振频率分别为2 800 Hz和3 000 Hz,发射电压响应峰值分别为139.6 dB和137.3 dB。当单极子和偶极子按1:1进行合成时,指向性波束图声轴方向前后声压比约为12 dB左右,波束宽度约为140度,符合宽波束的要求。结果表明:利用单极子模态和偶极子模态可以合成理想的半空间宽波束指向性。更多还原

【Abstract】 In this paper,a half-space wide-beam directional cylindrical transducer is presented,which is composed of monopole mode and dipole mode.The expected transducer was modeled and simulated with the finite element analysis software ANSYS,and important parameters such as admittance,transmitting voltage response and directivity were obtained.Among them,the resonant frequency of monopole and dipole in water was 2800 Hz and 3000 Hz respectively,and the peak of transmission voltage response was 139.6 db and 137.3 db respectively.When the monopole and dipole are synthesized in 1:1,the sound pressure ratio before and after the direction of the acoustic axis of the directivity beam pattern is about 12 dB,and the beam width is about 140 degrees,which meets the requirements of wide beam.The results show that the ideal half-space wide-beam directivity can be synthesized by using monopole mode and dipole mode.更多还原