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.
出处
《声学技术》
CSCD
北大核心
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)
关键词
空气声
移动声源
简正波
air-to-water sound field
moving acoustic
normal-modes
