CN208884753U - A kind of compound locally resonant metamaterial soundproof plate - Google Patents
A kind of compound locally resonant metamaterial soundproof plate Download PDFInfo
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- CN208884753U CN208884753U CN201821257676.9U CN201821257676U CN208884753U CN 208884753 U CN208884753 U CN 208884753U CN 201821257676 U CN201821257676 U CN 201821257676U CN 208884753 U CN208884753 U CN 208884753U
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- locally resonant
- resonant metamaterial
- soundproof plate
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Abstract
The utility model discloses a kind of compound locally resonant metamaterial soundproof plate, including locally resonant metamaterial layer, the density gradient of the locally resonant metamaterial layer is distributed are as follows: according to acoustic contact face, density is gradually increased, is gradually reduced, first increases to reduce again or first reduce and increase again from top to bottom.The utility model provides the more free compound locally resonant metamaterial soundproof plate of a kind of strong structure designability, material therefor and structure size, the flexible freedom of the design method of the utility model, light weight, volume is thin, sound-insulation capability is prominent, simultaneously can modularization installation, construct it is quick and convenient.
Description
Technical field
The utility model relates to the field of building materials, especially a kind of compound locally resonant metamaterial soundproof plate, mainly
Applied to places such as building fields, including house, hotel, factory, conference hall.
Background technique
With the development of science and technology, either in industry, human lives and military every field, it is various to set
Standby, machine military equipment is all towards enlargement, and heavy loading, lighting, the directions such as high speed are developed；These machinery equipments run institute
The noise problem of initiation becomes increasingly conspicuous, the health of these noise hazards people interferes the normal life of people, influences machine
The safe operation of equipment, fighting efficiency and stealthy function to weaponry cause very big influence.And the low frequency in noise point
Amount has again, and transmission capacity is strong, the characteristics of being not easy in communication process by Absorption of Medium, so that we are difficult that low frequency effectively is isolated
Noise.
By theoretical research it was found that in low frequency end, the sound insulation rule of traditional sound insulating material meets mass law,
Want to reach satisfied sound insulation effect, must just increase the quality of sound insulating material, here it is we insulate against sound cost greatly increase.
Therefore, how without increasing the production cost, low-frequency noise is effectively reduced just into research heat in recent decades
Point.
The 1990s, there has been proposed the concepts of phonon crystal, before 2000, mainly in Bragg type phonon
A large amount of research achievement is obtained in terms of crystal, but is limited to the matching problem of lattice dimensions and wavelength, can not be applied and low frequency end
Damping noise reduction.To after 2000, Liu Zhengyou et al. has found that the corresponding wavelength of band gap is greater than two orders of magnitude of lattice dimensions
Physical phenomenon, propose the thought of locally resonant unit, realize small size and control big wavelength, to solving the problems, such as low-frequency noise
Provide new thinking and means.By 2008, Yang Zhiyu had also been proposed a kind of film-type sound with dynamic negative mass density
Meta Materials are learned, provide a kind of solution more adaptable to low frequency noise reduction is solved.
In recent years, either all being obtained in terms of the theoretical basis of sound insulation noise abatement, calculation method or application study
Significant progress, to one-dimensional, two dimension, three-dimensional metamaterial structure has carried out effective analysis of band structure.Mainly have at present
The structural model of so several sound insulation and noise reducings:
1. there is the acoustic construction unit of resonance characteristic in intrinsic silicon embedment；
2. adding locally resonant unit on plate and shell structure surface:
3. film-type acoustic metamaterial.
As the sound insulation characteristics to the above material carries out continuing in-depth study, it can will be preferably played low
Advantage in terms of frequency sound insulation and noise reducing provides the means of better sound insulation and noise reducing for us.And for complicated boundary condition, extremely answer
It is also further had developed with the research of the sound insulation and noise reducing under environment, it is believed that thoroughly solved for comprehensively in the near future low
The problem of frequency noise reduction, provides more effective, more practical solution.
This patent proposes gradient composites concept, structure combined concept, it is desirable to provide a kind of structure designability is strong,
Material therefor and the more free compound locally resonant metamaterial soundproof plate of structure size.
Utility model content
The utility model is intended to provide a kind of compound locally resonant metamaterial soundproof plate, and structure designability is strong, used
Material and structure size are freer, can be freely combined and be designed according to actual sound insulation and noise reducing.
The utility model is realized in this way:
A kind of compound locally resonant metamaterial soundproof plate, including locally resonant metamaterial layer, the locally resonant are super
The density gradient of structure material layer is distributed are as follows: according to acoustic contact face, density is gradually increased, is gradually reduced, first increases again from top to bottom
Reduce or first reduce and increases again.
As the further improvement of utility model, from top to bottom according to acoustic contact face, the locally resonant metamaterial
Layer can need on it or surface layer is arranged in downside according to specific.
It can be used alone, can also be made into conjunction with other layer structures multiple as a further improvement of the utility model,
Laminate structures are closed to use.
As the further improvement of utility model, the surface layer is flase floor, porous plate or plate, and the surface layer is by wood
Material, plastics, aluminium alloy, steel, resin or porous sound absorbing material are made；The surface layer with a thickness of 0.1 ~ 20mm.
As the further improvement of utility model, the surface layer with a thickness of 0.1 ~ 5mm.
As the further improvement of utility model, the locally resonant metamaterial layer is at least one layer, and each layer local is total
Vibration metamaterial layer is made of opening grid, elastic film and rigid bulk.
As the further improvement of utility model, the opening grid is combined by least one of quadrangle, hexagon
It forms.
As the further improvement of utility model, the opening grid material is by plastics, aluminium alloy, steel, glass, composite wood
Material or glass-fiber-plate are made, and the wall thickness of the opening grid is 0.1 ~ 5mm.
As the further improvement of utility model, the elastic film is overlying on the upper and lower end face of opening grid or is clipped in two
It is open between the side of grid.
As the further improvement of utility model, the material of the elastic film is polypropylene film, nylon film, polyester
The thickness of at least one of film, polyethylene film or silicone rubber membrane, the elastic film is no more than 2mm.
As the further improvement of utility model, the thickness of the rigidity bulk is no more than 5mm, Stiff Block in grid single lattice
The quality and quantity of material are adjusted according to required intrinsic frequency.
For compared with prior art, the beneficial effects of the utility model are:
1. the utility model proposes gradient composites concept, structure combined concept, Graded Density can widen low frequency
The effective bandwidth of sound insulation.
2. cooperation is using opening grid, elasticity by using the locally resonant metamaterial layer being distributed with density gradient
Independent assortment between film and rigid bulk can select suitable density gradient distribution and group according to actual environment needs
Conjunction mode, to reach optimal sound insulation and noise reducing efficiency.
3. the utility model light weight, volume are thin, sound-insulation capability is prominent, at the same can modularization installation, construct quick and convenient.
Detailed description of the invention
Fig. 1 is a kind of each schematic diagram of a layer structure of compound locally resonant metamaterial soundproof plate provided by the utility model.
Fig. 2-Fig. 5 is a kind of density gradient signal of compound locally resonant metamaterial soundproof plate provided by the utility model
Figure.
Fig. 6-Fig. 7 is that the combination of shapes structure of opening grid provided by the utility model, elastic film and rigid bulk is shown
It is intended to.
Fig. 8-Fig. 9 is the positional diagram between elastic film provided by the utility model and opening grid.
Detailed description of the invention: 1- opening grid, 2- elastic film, 3- rigidity bulk, 10- locally resonant metamaterial layer, the face 20-
Layer.
Specific embodiment
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, with reference to the accompanying drawing and specifically
The present invention will be further described for embodiment.
Embodiment 1
A kind of compound locally resonant metamaterial soundproof plate as shown in Figure 1, including locally resonant metamaterial layer 10, institute
The density gradient distribution for stating locally resonant metamaterial layer 10 is as shown in Figure 2-5 are as follows: according to acoustic contact face density from top to bottom
It is gradually increased, is gradually reduced, first increasing to reduce again or first reduce and increase again.
So far, the utility model proposes gradient composites concept, Graded Densities can widen the effective of sound insulation room
Bandwidth can select suitable density gradient to be distributed, to reach optimal sound insulation and noise reducing efficiency according to actual environment needs.
It should be noted that the black dot in Fig. 2-Fig. 5 is expressed as density, black dot more multi-density is bigger, is scheming
In 6- Fig. 9, black dot is expressed as rigid bulk, in the case where above-mentioned text indicates, should not exist and misread the case where reading.
Embodiment 2
Further, as shown in Figure 1, from top to bottom according to acoustic contact face, the locally resonant metamaterial layer 10 can
It is specifically needed with foundation on it or surface layer 20 is arranged in downside.
Preferably, the surface layer 20 be flase floor, porous plate or plate, the surface layer by timber, plastics, aluminium alloy, steel,
Resin or porous sound absorbing material are made；The surface layer with a thickness of 0.1 ~ 20mm, be still more preferably 0.1 ~ 5mm.Using upper
The surface layer structure stated, material is simple and easy to get, and sound insulation effect is good.
" can be arranged according to specific needs " of the utility model meaning refers to can be according to actual environment needs, construction need
Even cost needs are wanted, decide whether that surface layer is arranged, side or two sides surface layer are set, such as: if the utility model is mounted on
On cement base bottom, since cement base bottom can substitute surface layer in sound insulation value, then the surface layer that can remove cement surface side is used.
Further, the compound locally resonant metamaterial soundproof plate of the utility model can be used alone, and can also tie
It closes other layer structures and is made into composite laminated structural use.
Embodiment 3
Further, as shown in Fig. 6-Fig. 9, the locally resonant metamaterial layer is at least one layer, each layer locally resonant
Metamaterial layer 10 is made of opening grid 1, elastic film 2 and rigid bulk 3.
Preferably, as Figure 6-Figure 7, the opening grid 1 by least one of quadrangle, hexagon combine and
At.1 material of opening grid is made of plastics, aluminium alloy, steel, glass, composite material or glass-fiber-plate, the opening grid 1
Wall thickness be 0.1 ~ 5mm.
Preferably, as illustrated in figs. 8-9, the elastic film 2 is overlying on the upper and lower end face (Fig. 8) of opening grid 1 or is clipped in
Between the side of two opening grids 1 (Fig. 9).
Preferably, the material of the elastic film 2 be polypropylene film, nylon film, polyester film, polyethylene film or
The thickness of at least one of silicone rubber membrane, the elastic film 2 is no more than 2mm.
Preferably, the thickness of the rigid bulk 3 is no more than 5mm, in grid single lattice the quality and quantity of rigid bulk according to
It is adjusted according to required intrinsic frequency.
So far, the utility model has also been proposed structure combined concept, the shape of opening grid, elastic film and rigid bulk
Shape, combination and positional relationship can specifically be designed according to noise source, and the combination that different situations are wanted is different.
To sum up, it is more multiple to provide a kind of strong structure designability, material therefor and structure size for the utility model
Locally resonant metamaterial soundproof plate is closed, the flexible freedom of the utility model design method, light weight, volume is thin, sound-insulation capability is prominent
Out, at the same can modularization installation, construct it is quick and convenient.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of compound locally resonant metamaterial soundproof plate, which is characterized in that including locally resonant metamaterial layer, the office
Resonate the density gradient distribution of metamaterial layer in domain are as follows: according to acoustic contact face from top to bottom density be gradually increased, be gradually reduced,
First increase to reduce again or first reduce and increase again.
2. compound locally resonant metamaterial soundproof plate according to claim 1, which is characterized in that according to acoustic contact face
From top to bottom, the locally resonant metamaterial layer can need on it or surface layer is arranged in downside according to specific.
3. compound locally resonant metamaterial soundproof plate according to claim 2, which is characterized in that the surface layer is grid
Plate, porous plate or plate, the surface layer are made of timber, plastics, aluminium alloy, steel, resin or porous sound absorbing material；The surface layer
With a thickness of 0.1 ~ 20mm.
4. compound locally resonant metamaterial soundproof plate according to claim 3, which is characterized in that the thickness of the surface layer
For 0.1 ~ 5mm.
5. compound locally resonant metamaterial soundproof plate according to claim 1-4, which is characterized in that the office
Metamaterial layer is resonated as at least one layer in domain, and each layer locally resonant metamaterial layer is by opening grid, elastic film and Stiff Block
Material is constituted.
6. compound locally resonant metamaterial soundproof plate according to claim 5, which is characterized in that the opening grid by
At least one of quadrangle, hexagon are composed.
7. compound locally resonant metamaterial soundproof plate according to claim 6, which is characterized in that the opening grid material
Material is made of plastics, aluminium alloy, steel, glass, composite material or glass-fiber-plate, and the wall thickness of the opening grid is 0.1 ~ 5mm.
8. compound locally resonant metamaterial soundproof plate according to claim 5, which is characterized in that the elastic film covers
In opening grid upper and lower end face or be clipped in two opening grid sides between.
9. compound locally resonant metamaterial soundproof plate according to claim 8, which is characterized in that the elastic film
Material is at least one of polypropylene film, nylon film, polyester film, polyethylene film or silicone rubber membrane, the elasticity
The thickness of film is no more than 2mm.
10. compound locally resonant metamaterial soundproof plate according to claim 5, which is characterized in that the rigidity bulk
Thickness be no more than 5mm, the quality and quantity of rigid bulk are adjusted according to required intrinsic frequency in grid single lattice.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821257676.9U CN208884753U (en) | 2018-08-06 | 2018-08-06 | A kind of compound locally resonant metamaterial soundproof plate |
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| CN201821257676.9U CN208884753U (en) | 2018-08-06 | 2018-08-06 | A kind of compound locally resonant metamaterial soundproof plate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108775091A (en) * | 2018-08-06 | 2018-11-09 | 深圳市航天新材科技有限公司 | A kind of compound locally resonant metamaterial sound panel |
| CN110182148A (en) * | 2019-06-10 | 2019-08-30 | 张健 | A kind of automobile sound insulation EVA plate |
| CN112849175A (en) * | 2020-12-24 | 2021-05-28 | 华东交通大学 | Noise-reduction train floor |
-
2018
- 2018-08-06 CN CN201821257676.9U patent/CN208884753U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108775091A (en) * | 2018-08-06 | 2018-11-09 | 深圳市航天新材科技有限公司 | A kind of compound locally resonant metamaterial sound panel |
| CN110182148A (en) * | 2019-06-10 | 2019-08-30 | 张健 | A kind of automobile sound insulation EVA plate |
| CN110182148B (en) * | 2019-06-10 | 2022-08-23 | 惠州市惠福鞋材有限公司 | Sound-insulation EVA (ethylene-vinyl acetate) plate for automobile |
| CN112849175A (en) * | 2020-12-24 | 2021-05-28 | 华东交通大学 | Noise-reduction train floor |
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