空中声源激发水下声场的建模研究  

Research on Modeling of Underwater Sound Field Excited by Aerial Source

作　　者：秦刚 QIN Gang(No.91550 Troops of PLA,Dalian 116023)

机构地区：[1]91550部队,大连116023

出　　处：《舰船电子工程》2020年第8期158-161,共4页Ship Electronic Engineering

基　　金：国家自然科学基金项目(编号:6170021755)资助。

摘　　要：针对空中声源激发的水下声场传播问题,利用射线理论讨论了平面波和球面波在空-海界面的透射特点,对空中静止点源水下声场传播进行了射线建模,分析了反射系数、透射系数和功率透射系数随掠射角的变化关系,结果表明,远场声场具有余弦方向性,声源下方声波可近似从高度为nh、强度为点源2n倍的虚源发出。Aiming at the propagation of underwater sound field excited by air sound source,the transmission characteristics of plane wave and spherical wave at air-sea interface are discussed by using ray theory.Ray modeling of underwater sound field propa⁃gation from aerial static point source is carried out.The relationship of reflection coefficient,transmission coefficient and power transmission coefficient with grazing angle is analyzed.The results show that far-field sound field has cosine directionality.Sound waves below the sound source can be approximately emitted from imaginary sources with height of nh and intensity of 2n times that of point sources.

关 键 词：射线法 球面波 空中声源 水下声场 

分 类 号：TB561[交通运输工程—水声工程]