Optical testing method for mutual radiation impedance of underwater acoustic array

Abstract

The invention belongs to the basic field of underwater acoustic testing technologies, and mainly relates to an optical testing method for the mutual radiation impedance of an underwater acoustic array. The optical testing method comprises the steps of obtaining vibration velocity information of a radiation surface of the acoustic array and a mass point of a radiating acoustic field by adopting a laser vibrometer, and then calculating by using the classical acoustic array mutual radiation impedance theory. The invention has the beneficial effects that the shortcomings of a commonly used intrusive acoustic array mutual radiation impedance testing method are overcome by using a non-contact testing method, problems of a method required for underwater acoustic array mutual radiation impedance testing and accurate testing under low frequency and high power are solved, a mutual radiation model is provided for underwater acoustic array velocity control, and a powerful technical guarantee is provided for the development of a low-frequency high-power acoustic array.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic testing, and mainly relates to an optical testing method for mutual radiation impedance of underwater acoustic arrays. Background technique [0002] With the development of underwater acoustic technology, the application frequency of underwater acoustics gradually expands to low frequencies. In order to increase the long-range detection and early warning capabilities of underwater targets, it is especially necessary to solve the problem of effective detection of low-noise targets. Active sonar arrays are gradually developing in the direction of low frequency, large aperture, and high power. In order to achieve high enough transmission power in a limited space, the array elements are usually arranged in a dense array in the design of active sonar arrays. When the distance between the array elements does not meet the minimum requirement of 1 / 4 wavelength, the interaction between the arr...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the existing interventional sound-based array radiation impedance testing method, the project of the present invention provides an optical test method for underwater acoustic-based array mutual radiation impedance, and proposes a non-contact optical method for testing acoustic-based array radiation impedance method to solve the test problem of mutual radiation impedance of low frequency active sonar array elements under high power

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