新型矢量水聽器研究
[Abstract]:The vector hydrophone, as a new type of underwater acoustic transducer, can provide the velocity information of the underwater acoustic field, which has the advantage unparalleled by the conventional hydrophone. Therefore, it can make the researchers understand the sound field more comprehensively and promote the study of underwater acoustic physical characteristics. Especially, the superior low frequency cosine directivity can make it in the small aperture. The vector hydrophone is divided into two main categories in accordance with the working principle: one is the inertial sensor, that is, the usual same vibrating column and the spherical vector hydrophone. As an inertial sensor, the structure is mainly composed of the suspension system and the sensor itself. A non inertia sensor, including a pressure differential vector hydrophone and a multimode hydrophone (a pressure differential vector hydrophone from the sensor mode itself). As a non inertial sensor, the suspension system is not needed. The index of sexual energy is determined by the sensor itself. In this paper, a rigid fixed column type vector hydrophone is proposed in this paper. The idea is to integrate the suspension system with the same vibrating column vector water hearing device and adopt a circular ring type rubber projectile in the structure. The surface contact mode between the spring and the same vibrating column type vector hydrophone; using the circular ring type rubber spring shear movement to make the underwater acoustic wave achieve the same vibration in the mode of motion. Firstly, the theory of receiving the same vibrating column type vector hydrophone usually does not consider the effect of the suspension system on the index of the sex energy, and the equivalent circuit method is used. The acoustic theory and the vibration system are fused simultaneously in the equivalent circuit. By establishing the equivalent circuit of a vectorial hydrophone with a suspension system, the sensitivity expression of the hydrophone in the water is derived. The influence of the hydrophone density, the internal sensitive element, the suspension system on the working characteristics of the water Lister is simulated and analyzed. The method (based on ANSYS software) is used to study the factors affecting the horizontal shear stiffness of the ring type rubber spring. Using the 2 parameter Mooney-Rivlen model, the effect of the material parameters and the size parameters on the shear stiffness is analyzed, and the influence of the different pressure values on the shear stiffness under the prestress conditions is calculated. Two kinds of vector hydrophone samples with different sensitive elements are built. The same vibration column vector hydrophone with a piezoelectric accelerometer is 500Hz-2500Hz with a sensitivity of no less than -190dB (@1kHz), and a built-in moving coil speed meter with a vibrating column vectorer, its working frequency is 500Hz-1600Hz, and the sensitivity is a -190dB. same mode vector hydrophone. The sexual suspension system is usually only a part of the vibration system and does not directly affect the sound wave. In this paper, a kind of vector hydrophone with the same vibrational sphere with elastic inclusions is studied. The sound waves are moved by the elastic inclusions to the internal spherical vector hydrophone, and then the velocity signal of the sound mass point is picked up. The vector water hearing is introduced in this paper. The establishment process of the physical model, through the theoretical and simulation analysis, determines the influence of the related parameters on the performance of the hydrophone. Finally, the water Lister sample is developed and the lake is tested on the lake. The working frequency is 63Hz-1600Hz and the sensitivity is -183dB (@1kH). The pressure differential vector hydrophone is usually only suitable for high frequency section. A new type of sandwich structure pressure differential vector hydrophone is proposed in this paper. This paper uses the bending vibration mode of the rod to work at a lower frequency. This paper studies how to use the ANSYS software to analyze the underwater acoustic characteristics of the pressure differential vector hydrophone. First, the pressure difference vector of the sandwich structure is used by the ANSYS finite element software. The modal analysis of the hydrophone is carried out in the air, and the influence of material parameters on the minimum vibration mode of the hydrophone is studied. Secondly, the water harmonic response is analyzed in water and the sensitivity of the hydrophone is simulated by the reciprocity principle. Through the sound field analysis, the directivity of the hydrophone is obtained. Finally, the pressure difference vector of the new sandwich structure is studied. The hydrophone is assembled and fabricated, and the sandwich structure pressure differential vector hydrophone sample is produced. The electroacoustic performance test is carried out in a silencer. The test results show that it is basically consistent with the theoretical results.
【學(xué)位授予單位】:哈爾濱工程大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2016
【分類號(hào)】:TB565.1
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