次声相控阵列的聚焦特性研究  

Research on the infrasound focusing properties of phased arrays

作　　者：宋蕊[1] 张明[1] 吴成国[1] 冯怡斯 季亮[1] 

机构地区：[1]中国人民解放军理工大学理学院,江苏南京211101

出　　处：《声学技术》2017年第1期6-9,共4页Technical Acoustics

基　　金：理学院青年科研基金项目(KYLYZL001209)

摘　　要：研究了提高非致命次声武器聚束能力和声强增益的方法。利用抛物面本身的自聚焦性能优化设计了一种新型的抛物面不等间距阵列。基于声场理论,计算出阵列声压分布;采用伪逆矩阵算法,数值仿真了与抛物面阵列中心轴垂直截面上以及中心轴上不同位置的声压分布。研究结果表明,不等间距抛物面相控阵列相对于传统平面阵列而言,声强分布的半峰宽度减小了16.7%,并且声强增益提高了48.6%,是较为理想的组合声源。通过仿真模拟论证了抛物面阵列的优越性,进而为次声武器的设计及研究提供了理论基础。This paper researches methods of improving focusing ability and intensity gain of nonlethal infrasonic weapon. A new type of parabolic array is presented on the basis of curved autofocus with nonplanar geometry. According to sound field theory, the sound pressure intensity formula is calculated. The amplitude distribution on the array is plotted out by numerical method. The results show that the width at half peak of sound intensity distribution for parabolic array decreases by 16.7 percent while the sound intensity gain increases by 48.6 percent, compared to conventional planar ring array. The results not only demonstrate the superiority of the parabolic array, but also provide a theoretical foundation for the research and design of infrasonic weapons.

关 键 词：相控阵 次声聚焦 伪逆矩阵算法 

分 类 号：TN95[电子电信—信号与信息处理]