Sound eliminating tile made of piezoelectric material

Abstract

The invention relates to a sound eliminating tile made of a piezoelectric material. An arc-shaped piezoelectric material block is vulcanized and encapsulated into novel synthetic rubber and used for underwater moving body shell surface and bridge surface. According to the basic principle that the density of piezoelectric material surface charge is in proportion to applied stress, an active sound eliminating tile for a hollow cavity type or a filler type underwater moving body shell surface is designed. By using the piezoelectric material as a core, the invention reduces the reflecting strength of a sound wave of an active sonar, inhibits vibration generated by an underwater moving body, isolates machine noise in the underwater moving body from being radiated to an underwater moving body and can obviously reduce the reflecting strength of the sound wave of the active sonar and the radiating noise and self noise of the underwater moving body and provide basis for the design of hidden and silent type underwater moving bodies.

Description

technical field [0001] The invention relates to a sound-absorbing tile made of piezoelectric material. Background technique [0002] When the underwater moving body moves underwater, on the one hand, strong radiation noise will be generated due to the rotation of the propeller, mechanical reciprocating vibration and fluid motion. If the radiation noise level of the underwater moving body is high, it is easy to be The detection of enemy targets is not conducive to the concealment and safety of one's own side; on the other hand, the self-noise of the underwater moving body itself is too high, which will seriously affect the detection range of its own sonar. [0003] For solving the problems referred to above, at present, all countries in the world are laying sound-absorbing tiles on the surface of underwater moving bodies. Anechoic tile is a very obvious measure to reduce the noise of underwater moving bodies, and it is also the most effective method to reduce the noise of su...

AI Technical Summary

Problems solved by technology

[0002] When the underwater moving body moves underwater, on the one hand, strong radiation noise will be generated due to the rotation of the propeller, mechanical reciprocating vibration and fluid motion. If the radiation noise level of the underwater moving body is high, it is easy to be The detection of enemy targets is not conducive to the concealment and safety of one's own side; on the other hand, the self-noise of the underwater moving body itself is too high, which will seriously affect the detection range of its own sonar

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