基于正八边形活塞声源阵列的指向性分析  

Directional Analysis of Sound Source Array of Positive Octagonal Piston

作　　者：巩建辉[1] 喻刚强 GONG Jian-hui;YU Gang-qiang(Electromechanical Engineering Department,Shangluo Vocational and Technical College,Shangluo Shannxi 726000,China)

机构地区：[1]商洛职业技术学院机电工程系

出　　处：《兰州工业学院学报》2019年第3期39-44,共6页Journal of Lanzhou Institute of Technology

基　　金：陕西省教育厅2017年专项科学研究计划项目(17JK0963)

摘　　要：提出了正八边形活塞声源模型,以正八边形活塞声源为阵元组建了线列阵和矩形平面阵.利用瑞利积分、Bridge乘积定理以及声源的指向性理论,求出了正八边形活塞声源、线列阵和矩形平面阵的远场指向性函数.借助Matlab软件对阵列的远场指向性进行了分析,得出了基于八边形活塞声源线列阵和矩形平面阵的指向性特点,以及阵列指向性随波数、阵元间距和阵元边长的变化关系.可为新型阵列建立及其指向性的分析提供参考.A positive octagonal piston sound source model is proposed,and a linear array and a rectangular planar array are formed by using the positive octagonal piston sound source as the array element.Using the Rayleigh integral,the Bridge product theorem and the directivity theory of the sound source,the far-field directivity function of the positive octagonal piston sound source,line array and rectangular planar array are obtained.The far field directivity of the array is analyzed with Matlab software to get the directivity characteristics of the octagonal piston source line array,and the rectangular plane array,and the array directivity along with the flowing wave number,the array element spacing and the array element side are obtained as well.This study provides a reference for the analysis of new arrays and their directivity.

关 键 词：正八边形活塞声源 线列阵 矩形平面阵 指向性 

分 类 号：TB556[理学—物理]