unknown

Transient sound field excited by cylindrical shell transducer in shallow ocean

Abstract

指向性声源在水声工程中被大量使用,如圆柱形换能器作为发射机被广泛应用于水声通讯系统,故对海下指向性声源瞬态辐射声场作深入研究非常必要。然而,长期以来,关于水下声源辐射声场的研究多集中于无指向性点源所辐射声场,而关于水下指向性声源瞬态辐射声场的研究较为匮乏。本文将围绕浅海水下圆柱壳式换能器瞬态辐射声场展开研究。 由于获得一些常用水下指向性声源的势函数并非易事,故本文在研究水下圆柱壳形换能器瞬态辐射声场时,采用瞬态矢量位移波动方程,而非瞬态声压波动方程。在此基础上,首先,导出均匀浅海中简谐波频散方程,通过数值计算对不同深度浅海中导波频散特性进行分析;然后,利用本征函数展开法(简正波法)导出均匀浅...Directional sound sources are widely used in underwater acoustic engineering, for example, cylindrical transducers are often used as transmitters in underwater acoustic communication devices. Thus, it is necessary to investigate the transient sound field excited by underwater directional sources. However, the research with respect to the sound field excited by underwater acoustic sources has main...学位:理学硕士院系专业:海洋与地球学院_海洋物理学号:3112011115134

    Similar works