摘要
针对超空泡鱼雷的流体动力受空泡包络形态强烈约束的特点，研究了一种用于扰乱其空化包络的水声聚焦相控阵列。首先讨论了水声聚焦相控阵列的设计要求，推导了凸球面相控阵换能器的声场传播公式，然后利用基于伪逆矩阵的声场合成算法对阵列的聚焦性能进行仿真，结果显示，在相同的阵列发射面积下，采用波束宽度较大的小阵元，可以相对提高声焦点处的压强和扩大有效聚焦区域，而阵列孔径对有效聚焦区域的影响较小，并给出了多焦点控制模式可能的应用。最后，用Logvinovich空泡截面独立扩张原理初步分析了强声波对抗超空泡鱼雷的作用机理。
Abstract
Regarding to the fact that the hydrodynamic characteristics of supercavitating torpedoes strongly depend on the supercavity envelops, this paper describes a high intensity underwater focused acoustic phased array used to remotely disrupt this envelope surface. First, the demand of designing an underwater focused acoustic phased array was discussed, and then an efficient sound field calculation formula for the convex spherical-section phased array was obtained. Furthermore, the sound focusing characteristics of above array were analyzed based on pseudo-inverse method. It is demonstrated, via simulation, that the arrays with minimum element size perform well on the intensity of focus pressure and the valid focusing region under the similar size of emission area. However, the change of valid focusing region is small when merely enlarge the aperture of array. And the possible application of multiple-focus pattern was investigated. Finally, the mechanism by which an imposed high-level sound field can countermeasure against supercavitating torpedoes was analyzed based on Logvinovich’s principle of independent cavity section expansion.
关键词
水声聚焦 /
相控阵列 /
声场 /
超空泡
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Key words
underwater focused acoustic /
phased arrays /
sound field /
supercavition
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周泽民;曾新吾 .
水声聚焦相控阵列及其声场特性研究[J]. 振动与冲击, 2012, 31(19): 86-89
ZHOU Ze-min;ZENG Xin-wu.
an Underwater Focused Acoustic Phased Array and the Sound Fields Characteristics[J]. Journal of Vibration and Shock, 2012, 31(19): 86-89
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脚注
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