平面阵指向性指数估算的改进  

Improvement of the calculation for planar array directivity index

作　　者：诸洁琪 申屠铠宇 陈伏虎[1] ZHU Jieqi;SHENTU Kaiyu;CHEN Fuhu(Hangzhou Applied Acoustic Research Institute,Hangzhou 310012,Zhejiang,China)

机构地区：[1]杭州应用声学研究所,浙江杭州310012

出　　处：《声学技术》2021年第2期205-209,共5页Technical Acoustics

摘　　要：一般国内估算声呐作用距离时,平面阵指向性指数采用《实用声呐工程》的公式进行估算,但可能因公式推导时近似项选取问题,实际应用时发现该估算结果与实际计算值相差较大,国内外现有的其他平面阵指向性指数估算公式也存在如误差较大或表达式复杂、理论过程不明确等问题。针对国内外存在诸多平面阵指向性指数估算公式的估算精度大小不一的问题,文章进行了理论推导、改进和比较分析,使估算值更接近真值。文章还进行了相应的仿真分析和验证,结果表明本文的估算公式更接近真实值,并适用于圆柱阵等其他曲面阵等基阵的指向性指数估算。The planar array directivity index calculated by the formula in the book of“Sonar for Practising Engineers”is usually used to estimate sonar detection range.However,the estimated result is different from actual calculated value.In many other existing formulas for estimating directivity index of planar array at home and abroad,there are some other problems,such as large errors,complex expressions,or unclear theoretical derivation.In view of the fact that the accuracies of many domestic and foreign directivity index estimation formulas of planar array are different,the improved theoretical derivation and comparative analysis are made in this paper,so that the estimated value can be closer to the true value.In addition,the corresponding simulation analysis and verification are performed.The result proves that the estimation formula in this paper is closer to the true results and it is applicable to other curved arrays such as cylindrical array.

关 键 词：平面阵 指向性指数 估算公式 适用性 

分 类 号：TB566[交通运输工程—水声工程]