薄壁球形导流罩对矢量水听器接收性能的影响

在实际使用时,为了减小流噪声对矢量水听器的影响,将其放置在流线型较好的导流罩内,因此对导流罩内矢量声场的计算是非常必要的。以水下弹性球壳为研究对象,从理论上研究了弹性薄球壳声透射对矢量水听器声场测量的影响;推导了平面声波对弹性球壳声透射的矢量声场数学表达式,计算了不同壳体参数下内充水弹性球壳的声透射矢量声场对矢量水听器各通道声波接收响应幅值和相位以及各通道接收指向性的影响。理论分析表明,弹性薄球壳透射声场对矢量水听器接收声场的影响与壳体机械阻抗和水听器安装位置密切相关,水听器安装偏差对其声场测量影响比较大。

Influence of thin walled spherical dome on the receiving performance of vector hydrophone

In the practical engineering,a vector hydrophone(VH) is usually put in a dome to reduce the flow noise.It is necessary to investigate the sound vector field in the dome.On the base of the theory of transmission of sound plane wave through a elastic spherical shell,the influence of sound transmission on the results of the VH measurement is studied in theory.The expression of the sound vector field in the spherical shell and its influence on the amplitude and phase of the receiving response and the receiving directivity pattern of the VH are calculated.The theoretical analysis shows that the influence of sound transmission of the spherical shell on the receiving sound field of the VH arises mainly from the mechanical impedance of the shell and the installation position of the hydrophone where any erroneous installation affects to larger extent the results of measurement of the hydrophone.