Acoustic radiation analysis and experimental verification of a broadband dense plane array

作     者：LIU Wangsheng LI Ya'an YU Hongpei LIU Wangsheng~1 LI Ya’an~1 YU Hongpei~2 (1 College of Marine,Northwestern Polytechnical University Xi’an 710072) (2 Hangzhou Institute of Applied Acoustics Hangzhou 310012)

作者机构：College of Marine Northwestern Polytechnical University Xi'an 710072 Hangzhou Institute of Applied Acoustics Hangzhou 310012 

出 版 物：《Chinese Journal of Acoustics》 (声学学报（英文版）)

年 卷 期：2011年第30卷第4期

页      面：464-472页

学科分类：080904[工学-电磁场与微波技术] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 082403[工学-水声工程] 08[工学] 070206[理学-声学] 0824[工学-船舶与海洋工程] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(51179158 51179157) 

主　　题：平面阵列 宽带阵列 声辐射分析 密集 验证 实验 分布计算 数组元素 

摘      要：The sound field distribution of a broadband array is calculated using the acoustics FEM and BEM. The FEM-BEM model is established for a nine-element plane array and its numerical method of calculating mutual radiation impedance among the transducers is given. The changing law of mutual radiation impedance influencing acoustics performances is analyzed. The directivity and beam width of the plane array are calculated at three resonance frequencies. A broadband dense plane array with nine elements is developed using triply resonant transducers. The input impedance and directivity of the plane array are measured in anechoic water tank. Results show that it is reasonable to design the array according to the half wavelengh of the first resonance frequency of the array element. The numerical solution agrees with the measuring results well, which indicates the FEM-BEM method is feasible to calculate sound field distribution and analyze mutual impedances.