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Photonic crystal function structure for realizing directional invisibility of underwater sonic wave and manufacturing method

A functional structure, underwater acoustic wave technology, applied in the field of acoustics, can solve the problems of limited material performance and absorption loss, strict requirements for acoustic structure design and processing of acoustic cloaks, slow progress in experimental verification, etc., to achieve the effect of simple processing

Active Publication Date: 2016-12-07
BEIJING JIAOTONG UNIV
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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.

Method used

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  • Photonic crystal function structure for realizing directional invisibility of underwater sonic wave and manufacturing method
  • Photonic crystal function structure for realizing directional invisibility of underwater sonic wave and manufacturing method
  • Photonic crystal function structure for realizing directional invisibility of underwater sonic wave and manufacturing method

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Embodiment Construction

[0037] The following describes the embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The following embodiments described with reference to the accompanying drawings are exemplary, and are only used to explain the present invention, and cannot be construed as limiting the present invention.

[0038] figure 1 It is a top view of a phonon function structure for realizing underwater acoustic wave directional stealth provided by an embodiment of the present invention; figure 2 It is a three-dimensional schematic diagram of a phonon functional structure for realizing underwater acoustic wave directional stealth provided by an embodiment of the present invention; image 3 for figure 1 Schematic diagram of the unit cell that realizes the phonon function structure of underwater acoustic directi...

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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 underwater acoustic wave directional stealth. Background technique [0002] Optical and acoustic stealth technology can make objects avoid the detection of electromagnetic waves or sound waves. In 2006, Professor J.B. Pendry of Imperial College of Technology in the United Kingdom proposed for the first time a method for constructing a stealth cover based on optical transformation. The corresponding research results were published in the journal "Science" and led the research boom in metamaterials. Metamaterials have certain characteristics that natural materials do not have, such as making waves "pass around" the surface of the material to achieve acoustic stealth, optical stealth, and electromagnetic wave stealth. The key to stealth is design, including designing a certain sub-wavelength level of microstructure units and...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/18G10K11/20
CPCG10K11/18G10K11/205
Inventor 汪越胜赵胜东王艳锋张传增
Owner BEIJING JIAOTONG UNIV
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