【作者】 诸洁琪； 陈伏虎； 黄迪；

【Author】 ZHU Jieqi;CHEN Fuhu;HUANG Di;Hangzhou Applied Acoustic Research Institute;

【机构】 杭州应用声学研究所；

【摘要】 本文通过对具有阵元指向性的平面阵指向性函数进行分析,并通过仿真比较有无阵元指向性情况下平面阵不同方位、不同频率的指向性指数,发现阵元指向性会使平面阵指向性指数有一定增加但基本小于1dB,与常用《实用声纳工程》中提到的增加3dB有较大区别。通过本文分析,具有阵元指向性情况下平面阵指向性指数需根据不同阵形、信号频率进行计算,以使计算带声障板平面阵指向性指数更加准确。更多还原

【Abstract】 This paper analyzes the directivity index of planar arrays with element directivity,and compares the directivity index of the planar array with or without the directivity of the element through simulation.It is found that the directivity of the element will cause the directivity of the planar array certain increase but is basically less than 1 dB,which is quite different from the 3 d B increase mentioned in the commonly used "Practical Sonar Engineering".Through the analysis of this paper,the directivity index of tplane array with the element directivity needs to be calculated according to different formations and signal frequencies to make the calculation of the directivity index of plane array with acoustic baffle more accurate.更多还原