CN209241181U - A kind of automobile dash board based on acoustic metamaterial - Google Patents
A kind of automobile dash board based on acoustic metamaterial Download PDFInfo
- Publication number
- CN209241181U CN209241181U CN201821887679.0U CN201821887679U CN209241181U CN 209241181 U CN209241181 U CN 209241181U CN 201821887679 U CN201821887679 U CN 201821887679U CN 209241181 U CN209241181 U CN 209241181U
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- Prior art keywords
- core
- clad
- acoustic metamaterial
- dash board
- automobile dash
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Abstract
The utility model discloses a kind of automobile dash boards based on acoustic metamaterial, including cellular construction, the cellular construction includes the core for being located at core, the clad being coated on outside the entire core and the matrix being coated on outside the entire clad, the core is made of metal material, the clad is made of elastic material, and the clad and the core composition form spring-mass unit.The automobile dash board structure is simple, on the basis of proof strength, rigidity, the excellent damping vibration attenuation characteristic not having with equal thickness steel plate, and acoustic metamaterial used by the front panel not only has structure function, have the function of vibration damping, sound insulating and absorbing attachment can be reduced, the lightweight of front panel is also achieved.
Description
Technical field
The utility model relates to vehicle vibration damping technical fields, and in particular to a kind of automobile front wall based on acoustic metamaterial
Plate.
Background technique
Currently, as the regulation of noise control is increasingly stringenter and user is to the requirement of the comfort of interior acoustic enviroment
It being continuously improved, Automobile Enterprises are paid more attention to from starting to achieve the purpose that vibration and noise reducing in design, automobile N V H (Noise,
Vibration and H arshness) performance have become evaluation vehicle performance a significant design index.
Auto NVH research is related to many components, and automobile dash board is that wherein pith, its damping property directly affect
To the comfort of driving, significant reference can be provided for structure optimization by carrying out Vibration Absorption Designing research to front panel.Front panel
Upper and lower part connect respectively with cowl upper and floor, two sides then with the front standing pillar of front panel or body side wall connect
It connects.Since front panel is the main sound-insulation member of enging cabin and cockpit, it is constantly studied with improve it sound insulation,
Vibration isolation and heat-proof quality are very important, and from material, front panel mostly uses interlayer vibration damping steel plate, and in front wall inner wall
Upper use has sound insulation, heat-insulated and damping effect asbestos pad, soundproof plate etc..In addition front wall panel vibration pushes in-vehicle air, from
And in-vehicle air volume is changed, and generate very big sound.The interior space of general car is about 3m3, if interior
0.002 m3 of changes in air volume, then interior acoustic pressure is up to 1.4Pa or 94dB.Automobile front wall in the prior art
Plate is primarily present following problem:
(1) the DC04 ordinary steel that front panel generally uses with a thickness of 0.8mm adds corresponding sound insulating and absorbing pad and vibration damping
Asphalt plank constitutes steel plate front panel system.The weight of whole system is about 18.7 kg, and weight ratio is heavier.However as automobile
The development of industrial technology, requirement of the people to automobile sound insulating material is higher and higher, do not require nothing more than sound insulation sound effective value it is more preferable, simultaneously also
Want material more lighter thinner；
(2) for sound insulation, there are a universal rule, that is, law of mass action, material heavier (surface density is bigger) sound insulation
Effect can be better.For single layer blank wall, surface density is often doubled, and oise insulation factor theoretically increases 6dB.Traditional sound insulation material
Material, such as glass fibre cotton, foamed glue, quiet sound insulating and absorbing cotton etc., kinetic energy when these materials are propagated in hole mainly by sound wave
The mode of thermal energy is converted into realize acoustic attenuation, it is obvious to the effect of noise high frequency section, but be difficult to play reason in middle low-frequency range
The inhibiting effect thought.Therefore, in order to be effectively isolated the middle low-frequency sound wave of 600-1200HZ, the thick material up to 70dm or so is needed
Interlayer is difficult to meet actual needs.
Utility model content
The purpose of this utility model is for the problems of the prior art, before providing a kind of automobile based on acoustic metamaterial
Coaming plate.
In order to achieve the above objectives, the technical solution adopted in the utility model is:
A kind of automobile dash board based on acoustic metamaterial, including cellular construction, the cellular construction include being located at core
Core, the clad being coated on outside the entire core and the matrix being coated on outside the entire clad, the core
Body is made of metal material, and the clad is made of elastic material, and the clad and the core composition form bullet
Spring mass unit.
Preferably, the core uses lead.
Preferably, the clad is made of silastic material.
Preferably, described matrix is made of steel material.
Preferably, pass through Nian Jie phase between the core and the clad, between the clad and described matrix
Connection.
Preferably, the quality of the core can be adjusted.
Preferably, width direction of the front panel by multiple cellular constructions along the front panel is successively connected in order
It is formed, the described matrix of each cellular construction is wholely set.
Further, each cellular construction is identical.
Preferably, the section of the core and the clad is square.
Preferably, the thickness that the clad is coated on each surface of the core is identical, and described matrix is coated on
Thickness on each surface of the clad is identical.
Due to the application of the above technical scheme, the utility model has the advantage that this is practical new compared with prior art
The automobile dash board structure based on acoustic metamaterial of type is simple, on the basis of proof strength, rigidity, has equal thickness steel plate
The excellent damping vibration attenuation characteristic not having, and acoustic metamaterial used by the front panel not only has structure function, more
There is the function of vibration damping, it is possible to reduce sound insulating and absorbing attachment also achieves the lightweight of front panel.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of the automobile dash board based on acoustic metamaterial of the utility model；
Attached drawing 2 is partial enlarged view at A in attached drawing 1；
Attached drawing 3 is the schematic diagram of the cellular construction of the automobile dash board based on acoustic metamaterial of the utility model；
Attached drawing 4 is the kinetic model of the cellular construction of the automobile dash board based on acoustic metamaterial of the utility model
Figure.
Specific embodiment
The technical solution of the utility model is further elaborated with reference to the accompanying drawing.
As depicted in figs. 1 and 2, the automobile dash board based on acoustic metamaterial of the utility model includes multiple unit knots
The automobile dash board to form the utility model is successively connected in order along the width direction of front panel for structure, multiple cellular constructions.
Each cellular construction includes the core 1 for being located at core, the clad 2 for the outside for being coated on entire core 1 and packet
The matrix 3 of the outside of entire clad 2 is overlayed on, the structural schematic diagram of each cellular construction is as shown in Figure 3.Core 1 is by metal material
Material is made, and core 1 forms lumped mass block, provides quality m.Clad 2 is made of elastic material, provides elastic k.In this way, packet
Coating 2 and the combination of core 1 just form spring-mass unit.Matrix 3 is made of common steel material, will be by core 1 and cladding
It is the direct receptor vibrated wherein that the spring-mass unit of 2 composition of layer, which surrounds, and the kinetic model of vibration analysis is shown in Fig. 4
It is shown.Front panel uses composite construction as described above, so that front panel has certain intensity and rigidity, in this way in front panel
The a small amount of reinforcing rib of upper setting can meet the requirement to the intensity and rigidity of front panel, without as needing in the prior art
A large amount of reinforcing ribs are set in front panel to improve the intensity and rigidity of front panel, and such front panel also has preferably
Vibration-damping function.
In the present embodiment, core 1 uses lead, and clad 2 is made of silastic material.
Bragg scattering and locally resonant are two kinds of dominant mechanisms that phonon crystal generates band gap.Locally resonant band gap mechanism
Think, when resonant frequency of the incident elastic wave frequency rate close to cellular construction, cellular construction generates resonance, incident elastic wave by
Strong resonance scattering effect, so that elastic wave energy is decayed along the direction of propagation, elastic wave propagation is suppressed, thus formation sound
Wavestrip gap (sound forbidden band), band gap are formed by the resonance and cellular construction and the interaction of incident elastic wave of cellular construction itself
, so the bandgap frequency range of cellular construction and itself vibration characteristics of cellular construction are closely bound up.In the present embodiment, core
1 quality can be adjusted, and by adjusting the bandgap frequency range of the adjustable cellular construction of quality of core 1, be subtracted to reach
The purpose of vibration.
Each unit structure for forming front panel is all the same, and the matrix 1 of each unit structure is wholely set.
Bonding connection type is all made of between core 1 and clad 2, between clad 2 and matrix 3.
In the present embodiment, the section of core 1, the section of clad 2 are square structure.
In the present embodiment, the thickness that clad 2 is coated on each surface of core 1 is all the same, and matrix 3 is coated on cladding
Thickness on each surface of layer 2 is also all the same.
To sum up, the front panel structure of the utility model on the basis of proof strength, rigidity there is equal thickness steel plate not have
Standby excellent damping vibration attenuation characteristic, acoustic metamaterial used by the front panel of the utility model not only have structure function, more
Has the function of vibration damping, it is possible to reduce sound insulating and absorbing attachment also achieves the lightweight of front panel.
The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique
Personage can understand the content of the utility model and be implemented, do not limit the protection scope of the present invention,
All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover in the protection scope of the utility model
It is interior.
Claims (10)
1. a kind of automobile dash board based on acoustic metamaterial, it is characterised in that: including cellular construction, the cellular construction includes
Positioned at the core of core, the clad that is coated on outside the entire core and the base being coated on outside the entire clad
Body, the core are made of metal material, and the clad is made of elastic material, the clad and the core group
Conjunction forms spring-mass unit.
2. the automobile dash board according to claim 1 based on acoustic metamaterial, it is characterised in that: the core uses lead
Block.
3. the automobile dash board according to claim 1 based on acoustic metamaterial, it is characterised in that: the clad uses
Silastic material is made.
4. the automobile dash board according to claim 1 based on acoustic metamaterial, it is characterised in that: described matrix uses steel
Material is made.
5. the automobile dash board according to claim 1 based on acoustic metamaterial, it is characterised in that: the core with it is described
It is connected by Nian Jie between clad, between the clad and described matrix.
6. the automobile dash board according to claim 1 based on acoustic metamaterial, it is characterised in that: the quality of the core
It can adjust.
7. the automobile dash board according to claim 1 based on acoustic metamaterial, it is characterised in that: the front panel is by more
A cellular construction is successively connected in order to be formed along the width direction of the front panel, the base of each cellular construction
Body is wholely set.
8. the automobile dash board according to claim 7 based on acoustic metamaterial, it is characterised in that: each unit knot
Structure is identical.
9. the automobile dash board according to claim 1 based on acoustic metamaterial, it is characterised in that: the core and described
The section of clad is square.
10. the automobile dash board according to claim 1 based on acoustic metamaterial, it is characterised in that: the clad packet
The thickness overlayed on each surface of the core is identical, and described matrix is coated on the thickness on each surface of the clad
It is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821887679.0U CN209241181U (en) | 2018-11-16 | 2018-11-16 | A kind of automobile dash board based on acoustic metamaterial |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821887679.0U CN209241181U (en) | 2018-11-16 | 2018-11-16 | A kind of automobile dash board based on acoustic metamaterial |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209241181U true CN209241181U (en) | 2019-08-13 |
Family
ID=67528461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821887679.0U Expired - Fee Related CN209241181U (en) | 2018-11-16 | 2018-11-16 | A kind of automobile dash board based on acoustic metamaterial |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209241181U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109334776A (en) * | 2018-11-16 | 2019-02-15 | 清华大学苏州汽车研究院（相城） | A kind of automobile dash board based on acoustic metamaterial |
-
2018
- 2018-11-16 CN CN201821887679.0U patent/CN209241181U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109334776A (en) * | 2018-11-16 | 2019-02-15 | 清华大学苏州汽车研究院（相城） | A kind of automobile dash board based on acoustic metamaterial |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190813 Termination date: 20211116 |
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| CF01 | Termination of patent right due to non-payment of annual fee |