空气中移动声源激发水下声场的频域简正波表示  

Modal representation of air-to-water sound transmission caused by moving airborne source

作　　者：李辉[1] 彭朝晖[1] 

机构地区：[1]中国科学院声学研究所声场声信息国家重点实验室,北京100080

出　　处：《声学技术》2007年第4期564-569,共6页Technical Acoustics

基　　金：国家自然科学基金资助项目(批准号:10523002)

摘　　要：文中提出了空气中移动声源激发水下声场的简正波频谱表达式。该表达式物理意义明确,形式简单,易于数值计算。利用文中表达式对目前比较流行的简正波程序Kraken进行了改进,通过与波数积分法OAST的计算结果进行比较,验证了所提表达式的正确性。通过数值模拟,对声源与接收相对运动时对声场产生的影响进行了讨论。A modal representation is developed for the acoustic pressure field in a stratified waveguide ex-cited by a moving airborne source.In principle,the normal mode expression presented can be easily im-plemented in many underwater acoustic normal-mode codes.As an example,it has been implemented in Kraken based on the normal mode theory.Numerical results from Kraken are shown to be in accordance with those by OAST,a wave-number integration code.A physical explanation of the source/receiver mo-vement is given.

关 键 词：空气声 移动声源 简正波 

分 类 号：O422.2[理学—声学]