Phonon functional structure and manufacturing method for realizing underwater acoustic wave directional stealth

Abstract

The embodiments of the invention provide a photonic crystal function structure for realizing directional invisibility of underwater sonic wave and a manufacturing method. The photonic crystal function structure includes an aluminum alloy matrix; the aluminum alloy matrix is drilled with holes which are arranged according to the period of a plane equilateral triangle photonic lattice. The middle part of the aluminum alloy matrix is penetrated with a cavity of the aluminum alloy matrix for accommodating the to-be-invisible object. According to the invention, the function structure can only be obtained by drilling the aluminum alloy matrix and is easy to process.

Description

technical field [0001] The invention relates to the field of acoustics, in particular to a phonon functional structure and a manufacturing method for realizing directional stealth of underwater acoustic waves. Background technique [0002] Optical and acoustic cloaking technology can make objects avoid the detection of electromagnetic waves or sound waves. In 2006, Professor J.B.Pendry of Imperial College of Technology proposed the method of constructing the cloak based on optical transformation for the first time, and the corresponding research results were published in the "Science" magazine, which led the upsurge of research on metamaterials. Metamaterials have certain properties that natural materials do not have, such as making waves "bypass" the surface of the material to achieve acoustic cloaking, optical cloaking, and electromagnetic wave cloaking. The key to stealth is design, including the design of certain sub-wavelength microstructure units and the arrangement r...

AI Technical Summary

Problems solved by technology

Although metamaterial stealth has made rapid progress in theoretical research, a bottleneck is that the performance of materials is severely limited by the absorption loss

At the same time, the acoustic cloak has extremely strict requirements on the design and processing of the acoustic structure, and the progress in experimental verification is relatively slow.

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