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Film acoustic metamaterial of honeycomb flanged structure

A technology of acoustic metamaterials and thin films, applied in the field of acoustic metamaterials, can solve the problem that low-frequency noise is difficult to effectively isolate, and achieve the effect of light structure and improved structure layout efficiency.

Pending Publication Date: 2020-11-03
DALIAN UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that low-frequency noise in the current ship field is difficult to effectively isolate

Method used

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  • Film acoustic metamaterial of honeycomb flanged structure
  • Film acoustic metamaterial of honeycomb flanged structure
  • Film acoustic metamaterial of honeycomb flanged structure

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Embodiment Construction

[0037] The specific implementation manners of the present invention will be described in further detail below in conjunction with the technical solutions and accompanying drawings.

[0038] figure 1 Shown is an embodiment of a thin-film acoustic metamaterial with a honeycomb folded-edge structure according to the present invention.

[0039] The invention adds a layer of thin film on the basis of the variable-angle folded frame structure, and utilizes sound waves to resonate with the cavity and the thin film, thereby achieving good sound insulation effect in the low frequency range.

[0040] figure 1 It is a multicellular structure of the acoustic metamaterial, including an upper frame 1 , a middle membrane 2 and a lower frame 3 .

[0041] figure 2 It is a top view of the multicellular structure of the acoustic metamaterial, and its section is a regular hexagon with side length a.

[0042] image 3 is the top view of the multi-cell model of the acoustic metamaterial aft...

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Abstract

The invention belongs to the technical field of acoustic metamaterials for low-frequency noise control, and relates to a film acoustic metamaterial of a honeycomb flanged structure, wherein a structural unit is formed by combining a film and the flanged honeycomb structure; the film acoustic metamaterial adjusts the frequency corresponding to the sound insulation peak to move to low frequency by changing the angle of the folded edge. According to the invention, the hexagonal honeycomb frame structure can be made of light carbon fibers, resin and other materials; compared with a traditional metal material, the structural weight of the honeycomb flanged acoustic metamaterial with the film structure is light, and the strength design requirement of the whole structure can be met.

Description

technical field [0001] The invention belongs to the technical field of acoustic metamaterials used for low-frequency noise control, and in particular relates to a thin-film acoustic metamaterial with a honeycomb folded edge structure. Background technique [0002] With the continuous development of science and technology, the high speed, large size and light weight of ships make the vibration and noise problems more prominent than in the past. Plates, stiffened plates and other structures are widely used in ship structures, and under the excitation of mechanical external forces, vibrations are generated, resulting in radiated noise. Vibration will not only damage the engineering structure and affect its life, reduce the sensitivity of instruments and instruments, but also the excessive radiation noise can be easily detected by the enemy, which will affect the range and accuracy of the sonar system of the hull itself, and reduce the stealth of the ship itself It also has a g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/172G10K11/162
CPCG10K11/172G10K11/162
Inventor 崔洪宇朱帅胡昊明刘承韬胡召平
Owner DALIAN UNIV OF TECH
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