水下阻抗球(柱)内部质点振速分布规律研究

针对同振式矢量水听器的物理模型,将其考虑成一个声场中静止的阻抗球体或柱体,建立了平面波作用下的声场模型,并依据简正波理论推导了球体和柱体内部的声场特性,得到了阻抗球体和柱体内部各个位置处的振速与水质点振速的关系表达式,分析了不同材料参数和几何参数下其内部质点振速的分布规律。研究结果对以后矢量水听器的研制过程中材料的选择与结构尺寸的设计具有指导意义。

The vibration velocity distribution of internal particles in underwater impedance sphere or cylinder

Based on the physical model of co-oscillating vector hydrophone, the hydrophone is considered as an impedance sphere or cylinder vibrating freely under the action of sound waves. The sound field models of impedance sphere and cylinder are established and the characteristic of internal sound field is derived based on the normal-mode theory. And then the relationships between the outside water particle vibration velocities and the internal particle vibration velocities at different positions in sphere and cylinder are derived. According to the calculation of frequency response under different materials and geometric parameters, the distribution of internal particle velocity is obtained. The results of the study are helpful for the material selection and the structure size design in developing new vector hydrophone.