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Phononic Crystal Structure with Local Resonance and Soundproof Wall Panel Using the Structure

A phononic crystal and local resonance technology, which is used in sound insulation, building components, sound-producing equipment, etc., can solve the problem of limited low-frequency band gap width of local resonance phononic crystals, achieve good intermediate-frequency wide-bandgap characteristics, and isolate intermediate frequencies. effect of noise

Active Publication Date: 2020-06-23
WENZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The width of the low-frequency bandgap of traditional local resonance phononic crystals is very limited

Method used

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  • Phononic Crystal Structure with Local Resonance and Soundproof Wall Panel Using the Structure
  • Phononic Crystal Structure with Local Resonance and Soundproof Wall Panel Using the Structure
  • Phononic Crystal Structure with Local Resonance and Soundproof Wall Panel Using the Structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] refer to figure 1 and figure 2 , a local resonance phononic crystal structure, including a square outer frame 1, the center of the square outer frame 1 is provided with a square scatterer 2 that reduces the outline of the square outer frame 1 proportionally, the square outer frame 1 and the square scatterer 2 The cross-sectional shapes are all square; at least two first elastic beams 3 and at least two second elastic beams 4 are respectively connected between the inner side wall of the square outer frame 1 and the side wall of the square scatterer 2, and the first elastic beam 3 Both the number of the second elastic beam 4 and the second elastic beam 4 are preferably four. Four first elastic beams 3 and four second elastic beams 4 are staggered and arranged at intervals around the center of the square scatterer 2. The first elastic beams 3 include a first connecting section 31 and a first inclined section 32 fixedly connected in sequence. And the first serpentine sec...

Embodiment 2

[0037] refer to image 3 , a soundproof wallboard, comprising a local resonance phonon crystal structure, the local resonance phonon crystal structure is extended along the direction of the cross-section to form a strip shape, and the local resonance phonon crystal structure is extended along the direction perpendicular to There are several strips arranged in a direction, and the adjacent local resonance phononic crystal structures are integrally arranged, and a plurality of local resonance phononic crystal structures form a structural layer, and the structural layer is provided with at least two layers, The adjacent structural layers are integrally arranged.

[0038] The local resonant phononic crystal structure proposed by the present invention has good medium-frequency wide-bandgap characteristics. The phononic crystals are arranged in the form of a square lattice to form a sound-insulating wall, which has the ability to isolate the medium-frequency noise in the opera house...

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Abstract

The present invention discloses a novel locally resonant photonic crystal structure. The structure comprises a square outer frame, the center of the square outer frame is provided with a square scatterer, at least two first elastic beams and at least two second elastic beams are connected between the inner side wall of the square outer frame and the side wall of the square scatterer, the at leasttwo first elastic beams and the at least two second elastic beams are arranged around the center of the square scatterer and are arranged at intervals in an interlaced mode, each first elastic beam comprises one first connection section, one first inclination section and one first S-shaped section which are fixedly connected in order, each second elastic beam comprises one connection body, one left beam body and one right beam body symmetrically arranged with the left beam body, the square outer frame, the first elastic beams and the second elastic beams are integrally arranged and are made oforganic glass, and the materials of the square scatterer are silicon nitride ceramics. The novel locally resonant photonic crystal structure has good intermediate frequency broad-band gap features.

Description

technical field [0001] The invention relates to the field of structural design of acoustic functional materials, in particular to a local resonant phonon crystal structure and a sound-insulating wallboard using the structure. Background technique [0002] With the improvement of living standards, all walks of life have ways to release stress, and listening to opera has become a hobby of the upper class in society. The overall sound insulation effect of the opera house will affect the normal life of surrounding residents. Therefore, the opera house needs to use a lot of sound insulation materials in the construction process. Today's opera house sound insulation materials mainly include: (1) theater fabric soft-covered sound-absorbing panels; (2) theater polyester fiber sound-absorbing panels; (3) floor sound-insulating building mats ; (4) Glass sound insulation cotton, etc. The above sound insulation materials have a good isolation effect on the sound in the low frequency ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10K11/172E04B1/86
CPCE04B1/86G10K11/172
Inventor 向航翟红锋向家伟
Owner WENZHOU UNIV
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