CN205845511U - A kind of defect state structural acoustic metamaterial board - Google Patents
A kind of defect state structural acoustic metamaterial board Download PDFInfo
- Publication number
- CN205845511U CN205845511U CN201620501509.9U CN201620501509U CN205845511U CN 205845511 U CN205845511 U CN 205845511U CN 201620501509 U CN201620501509 U CN 201620501509U CN 205845511 U CN205845511 U CN 205845511U
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- defect state
- acoustic metamaterial
- state structural
- metamaterial board
- structural acoustic
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Abstract
The utility model discloses a kind of defect state structural acoustic metamaterial board, including elastic film, two pieces of composite panels and several quality sheets, wherein, two pieces of described composite panels are adhered to the upper and lower both sides of elastic film respectively, being provided with the opening of periodic arrangement on described composite panel, several described quality sheets are respectively arranged on the elastic film of opening part, and described quality sheet has defect state structure in distribution.The defect state structural acoustic metamaterial board that this utility model provides, simple in construction, design is good, and used basic material is all conventional material, it is easy to mass processing, production, is worth popularization in the field of business.
Description
Technical field
This utility model belongs to acoustic metamaterial technical field, is specifically related to a kind of defect state structural acoustic metamaterial board.
Background technology
Vibration also exists widely at nature, and the most vibration sources in real life environments are distributed in
The low-frequency range of below 250Hz, low-frequency vibration in this frequency range and noise are slow due to its energy attenuation, and propagation distance is remote,
The feature that penetration capacity is strong, it is difficult to control and intercept, all creates the biggest harm to commercial production and human body.In engineering, often
Sound insulating material and damping material is used to reduce low-frequency vibration and noise.When tradition sound insulating material sound wave to be isolated and vibration, one
As need the gauge of sound insulating material parts to match with wave length of sound, if the sound wave of below 100Hz to be isolated, it is necessary to
The thickness sound insulating material more than 1m, this is in the compact equipment in the inner spaces such as automobile, train, aircraft, it is clear that be unpractical；
Damping material has certain consumption to low-frequency vibration and noise, but along with lightweight, economy, environmental protection etc. require continuous
Strengthening, limit stricter to the quality of damping material, conventional damper material can not meet the need of low frequency vibration damping noise reduction
Ask；Therefore in the urgent need to developing new low frequency vibration damping acoustic damping materials.
Acoustic metamaterial is the novel artificial functional material that a kind of development in recent years is got up, and acoustic metamaterial and electromagnetism surpass material
Expect corresponding, refer to the artificial sub-wavelength structure with negative equivalent mass density or negative concrete moduli, owing to it has good
Elastic wave band gaps and wave-guiding characteristic, shown huge potentiality in low-frequency vibration and field of noise control.On the one hand, acoustics surpasses
Material can produce " forbidden band " effect to vibrating elastic ripple in low-frequency range, reaches the purpose of isolation vibration；On the other hand,
Defect sturcture in acoustic metamaterial has of a relatively high elastic wave transmission capacity, i.e. forms " waveguide ", it is possible to by major part
Vibrating elastic wave energy guide, frequency dividing to corresponding dynamic vibration absorber, vibration energy regeneration Qi Deng mechanism, thus realize low
The control of frequency vibration.As can be seen here, acoustic metamaterial technology is low-frequency vibration and the control of noise provides a feasible path.
Utility model content
The purpose of this utility model is to solve the problems referred to above, it is provided that the defect state structure that a kind of simple in construction, design are good
Acoustic metamaterial plate.
For solving above-mentioned technical problem, the technical solution of the utility model is: a kind of defect state structural acoustic metamaterial board,
Including elastic film, two pieces of composite panels and several quality sheets, wherein, two pieces of described composite panels are adhered to respectively
The upper and lower both sides of elastic film, described composite panel is provided with the opening of periodic arrangement, and several described quality sheets are respectively
Being arranged on the elastic film of opening part, described quality sheet has defect state structure in distribution.
Preferably, described defect state structure includes that quality tablet quality is unequal, quality sheet position eccentric or quality sheet disappearance
In at least one.
Preferably, described opening is circular open, and described circular open is matrix arrangement.
Preferably, generally circular in shape, square, the triangle or irregularly shaped of described quality sheet.
Preferably, described quality sheet thickness is less than composite panel.
Preferably, described quality sheet is made up of heavy metal material.
Preferably, described heavy metal material is ferrum, copper or steel.
Preferably, described elastic film is made up of elasticoviscous property material.
Preferably, described elasticoviscous property material is nitrile rubber, silicone rubber or compounded rubber.
Preferably, described composite panel uses light material to make.
The beneficial effects of the utility model are: the defect state structural acoustic metamaterial board that this utility model provides, in elasticity
Thin film both sides arrange composite panel, arrange opening on composite panel simultaneously, and the quality sheet being adhered to opening part divides in entirety
There is on cloth defect state structure so that this utility model can isolate low-frequency vibration in 1000Hz wider acoustics forbidden band formed below
With noise, simultaneously can form some waveguides within 1000Hz, the vibrational energy in waveguide frequency is guided to specify position or
Direction, is absorbed by dynamic vibration absorber or vibration energy regeneration Qi Deng mechanism.Further, this acoustic metamaterial plate gross thickness can
Less than 5mm, the most frivolous, planar dimension can flexible design, system of laying is close with traditional product, automobile, train, aircraft,
The equipment such as naval vessel are prone to arrange.Generally speaking, this utility model simple in construction, design is good, and used basic material is all
Conventional material, it is easy to mass processing, production, is worth popularization in the field of business.
Accompanying drawing explanation
Fig. 1 is the basic unit cell units structural representation of this utility model defect state structural acoustic metamaterial board；
Fig. 2 is the basic unit cell units structure sectional view of this utility model defect state structural acoustic metamaterial board；
Fig. 3 is the quality sheet distribution defect state structural representation of this utility model defect state structural acoustic metamaterial board；
Fig. 4 is the overall structure schematic diagram of this utility model defect state structural acoustic metamaterial board.
Description of reference numerals: 1, quality sheet；2, composite panel；3, elastic film；4, defect state structure.
Detailed description of the invention
With specific embodiment, this utility model is described further below in conjunction with the accompanying drawings:
As Figure 1-4, this utility model defect state structural acoustic metamaterial board, including elastic film 3, two pieces of composite woods
Flitch 2 and several quality sheets 1.Two pieces of composite panels 2 are adhered to elastic film about 3 both sides, composite panel 2 respectively
On be provided with the opening of periodic arrangement, several quality sheets 1 are bonded on the elastic film 3 of opening part respectively, and quality sheet 1 exists
Distribution has defect state structure 4.Defect state structure 4 is the deployment scenarios overall for several quality sheets, including quality sheet 1
Quality is unequal, quality sheet 1 position is eccentric or at least one in quality sheet 1 disappearance.
It should be noted that the opening of the periodic arrangement arranged on composite panel 2, the shape of opening can be circular
Or polygon, the arrangement mode of opening can also determine according to actual needs.Composite panel 2 can be made up of light material.Quality
The shape of sheet 1 can be circular, square, triangle or irregularly shaped, and it is made up of the heavy metal material that mass density is bigger,
Such as metal materials such as ferrum, steel or copper, thickness is less than composite panel 2.Elastic film 3 is made up of viscoelastic material, such as butyronitrile rubber
The materials such as glue, silicone rubber or compounded rubber.
Below as a example by the basic structure cell of this utility model defect state structural acoustic metamaterial board, to this utility model defect
The structure of state structural acoustic metamaterial board is described in further detail, in order to displaying advantage of the present utility model further:
As it is shown in figure 1, basic structure cell is the minimum unit constituting whole defect state structural acoustic metamaterial board.The most square knot of structure cell
Structure, the length of side of each structure cell is 40.Elastic film 3 uses nitrile rubber to make, and thickness is 1.Composite panel 2 uses fibre
Dimension composite is made, and thickness is 2, is adhered to elastic film about 3 both sides.On composite panel 2, circular open is set, directly
Footpath is 30, and circular open is matrix arrangement.Quality sheet 1 is round iron plate, diameter 24.5, and thickness 1 is adhered to opening
On the elastic film 3 at place.As shown in Figure 4, aforementioned structure cell is rearranged defect state structural acoustic metamaterial board according to required,
Wherein the quality sheet 1 of the 6th row the first row unit cell units lacks, and the quality sheet 1 of the 6th row the third line and fifth line unit cell units is inclined
The heart is arranged.This acoustic metamaterial plate shakes transmission function hell 20dB in 100Hz～150Hz, forms acoustics forbidden band effect, its
In the 6th be listed in 120Hz and be formed about waveguide.
What deserves to be explained is, in actual applications, can be according to engineering demand, the physical dimension to basic structure cell, structure cell is arranged
Row number, forbidden band frequency and bandwidth, waveguide frequency and bandwidth are designed, to reach the purpose of on-demand production.Further, close
Quality sheet 1 disappearance being also not necessarily limited in embodiment in the defect state structure 4 of quality sheet 1 distribution is constituted with quality sheet 1 eccentric position.
The quality that can also make some of which quality sheet 1 is compared unequal with other quality sheet 1, or the different material of quality piece collection
Matter.Specifically arranging of defect state structure 4 can be adjusted according to Practical Project demand.
The defect state structural acoustic metamaterial board that this utility model provides, has good elastic wavestrip in low-frequency range
Gap and wave-guiding characteristic, it is possible to low-frequency vibration elastic wave is produced " forbidden band " effect, reach the purpose of isolation vibration, and its defect knot
Structure has of a relatively high elastic wave transmission capacity, vibrating elastic wave energy can be guided, divide to corresponding dynamic vibration absorber,
Vibration energy regeneration Qi Deng mechanism.This defect state structural acoustic metamaterial board can be used for the equipment such as automobile, train, ships, aircraft
The reduction of medium and low frequency vibration and noise, isolate and control.
Those of ordinary skill in the art is it will be appreciated that embodiment described here is to aid in this reality of reader understanding
By novel principle, it should be understood that protection domain of the present utility model is not limited to such special statement and embodiment.
Those of ordinary skill in the art can make various without departing from this practicality according to these technology enlightenment disclosed in this utility model
Other various concrete deformation and combination of novel essence, these deformation and combination are still in protection domain of the present utility model.
Claims (10)
1. a defect state structural acoustic metamaterial board, it is characterised in that: include elastic film (3), two pieces of composite panels (2)
And several quality sheets (1), wherein, two pieces of described composite panels (2) are adhered to elastic film (3) both sides up and down respectively,
Being provided with the opening of periodic arrangement on described composite panel (2), several described quality sheets (1) are respectively arranged at opening part
Elastic film (3) on, described quality sheet (1) has defect state structure (4) in distribution.
Defect state structural acoustic metamaterial board the most according to claim 1, it is characterised in that: described defect state structure (4)
, quality sheet (1) position unequal including quality sheet (1) quality be eccentric or at least one in quality sheet (1) disappearance.
Defect state structural acoustic metamaterial board the most according to claim 1, it is characterised in that: described opening is that circle is opened
Mouthful, described circular open is matrix arrangement.
Defect state structural acoustic metamaterial board the most according to claim 1, it is characterised in that: the shape of described quality sheet (1)
Shape is circular, square, triangle or irregularly shaped.
Defect state structural acoustic metamaterial board the most according to claim 1, it is characterised in that: described quality sheet (1) thickness
Less than composite panel (2).
Defect state structural acoustic metamaterial board the most according to claim 1, it is characterised in that: described quality sheet (1) is by weight
Metal material is made.
Defect state structural acoustic metamaterial board the most according to claim 6, it is characterised in that: described heavy metal material is
Ferrum, copper or steel.
8. according to the arbitrary described defect state structural acoustic metamaterial board of claim 1～6, it is characterised in that: described Thin Elastic
Film (3) is made up of elasticoviscous property material.
Defect state structural acoustic metamaterial board the most according to claim 8, it is characterised in that: described elasticoviscous property material is fourth
Nitrile rubber, silicone rubber or compounded rubber.
10. according to the arbitrary described defect state structural acoustic metamaterial board of claim 1-6, it is characterised in that: described composite wood
Flitch (2) uses light material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620501509.9U CN205845511U (en) | 2016-05-27 | 2016-05-27 | A kind of defect state structural acoustic metamaterial board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620501509.9U CN205845511U (en) | 2016-05-27 | 2016-05-27 | A kind of defect state structural acoustic metamaterial board |
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| Publication Number | Publication Date |
|---|---|
| CN205845511U true CN205845511U (en) | 2016-12-28 |
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ID=57622327
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620501509.9U Expired - Fee Related CN205845511U (en) | 2016-05-27 | 2016-05-27 | A kind of defect state structural acoustic metamaterial board |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332267A (en) * | 2019-06-25 | 2019-10-15 | 东南大学 | A kind of adjustable multilayered cylindrical shell of density |
| CN110595993A (en) * | 2019-09-19 | 2019-12-20 | 哈尔滨工程大学 | Experimental device containing acoustic metamaterial plate with convex vibration absorbers |
| CN111489728A (en) * | 2019-12-13 | 2020-08-04 | 中国舰船研究设计中心 | Active acoustic metamaterial based on local resonance |
-
2016
- 2016-05-27 CN CN201620501509.9U patent/CN205845511U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332267A (en) * | 2019-06-25 | 2019-10-15 | 东南大学 | A kind of adjustable multilayered cylindrical shell of density |
| CN110595993A (en) * | 2019-09-19 | 2019-12-20 | 哈尔滨工程大学 | Experimental device containing acoustic metamaterial plate with convex vibration absorbers |
| CN111489728A (en) * | 2019-12-13 | 2020-08-04 | 中国舰船研究设计中心 | Active acoustic metamaterial based on local resonance |
| CN111489728B (en) * | 2019-12-13 | 2024-03-26 | 中国舰船研究设计中心 | Active acoustic metamaterial based on local resonance |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161228 Termination date: 20200527 |
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| CF01 | Termination of patent right due to non-payment of annual fee |