CN208126867U - A kind of honeycomb interlayer sound absorption structure of built-in microperforated panel - Google Patents
A kind of honeycomb interlayer sound absorption structure of built-in microperforated panel Download PDFInfo
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- CN208126867U CN208126867U CN201820641406.1U CN201820641406U CN208126867U CN 208126867 U CN208126867 U CN 208126867U CN 201820641406 U CN201820641406 U CN 201820641406U CN 208126867 U CN208126867 U CN 208126867U
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- honeycomb core
- microperforated panel
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Abstract
The utility model discloses a kind of honeycomb interlayer sound absorption structures of built-in microperforated panel, the honeycomb sandwich construction is by honeycomb core, top panel, lower panel and internal microperforated panel are constituted, the honeycomb core is hollow cylinder, internal microperforated panel is set in the honeycomb core, the top panel and lower panel are separately positioned on the top and bottom of honeycomb core, the air chamber that the internal microperforated panel and top panel are constituted forms a double helmholtz resonance chamber, a resonant cavity, which is formed, with the air chamber that lower panel is constituted collectively forms the structure with double suction acoustic performance, the honeycomb core provided with internal microperforated panel is one group with six and arranges by sequential cycles of group, six double helmholtz resonance chambers in same group of honeycomb core it is of different sizes, it forms gradient chamber and constitutes quadratic remainder diffuser.The double suction sound effective value of the utility model honeycomb interlayer substantially increases acoustical absorptivity, and can widen sound sucting band in low frequency, enhances the whole sound absorbing performance of structure, and lighter in weight designs more light and handy.
Description
Technical field
The utility model relates to a kind of honeycomb sandwich constructions, and in particular to one kind adds micropunch in honeycomb cavity
The honeycomb interlayer sound absorption structure of the built-in microperforated panel of plate.
Background technique
Since the physical and mental health and flight experience of the noise on human in aircraft passenger compartment generate certain influence, therefore aircraft is objective
Noise control in cabin has gradually obtained the attention of people, it is therefore desirable to can be carried out absorption to noise to the full extent.Due to
Aircraft is very sensitive for weight, therefore design principle is sound energy consumption in the case where not increasing weight, and honeycomb is because its is light,
The high advantage of specific strength specific stiffness, uses aboard extensively, on this basis if honeycomb sandwich construction is designed peace
In aircraft passenger compartment inner wall, intensity requirement and noise absorbent can be reached.The honeycomb core of honeycomb sandwich construction is usually
Using structures such as hexagon, rectangles, the utility model is using round honeycomb sandwich construction as research object, by honeycomb core structures
Interior addition acoustic damping, further to widen the sound sucting band of honeycomb, low frequency absorption performance in raising optimizes aircraft passenger compartment
Interior environment.
Utility model content
The purpose of this utility model is to provide a kind of honeycomb interlayer sound absorption structures of built-in microperforated panel, with round honeycomb
Sandwich is research object, by adding acoustic damping in honeycomb core structures, further to widen the sound absorption of honeycomb
Frequency band, effect of low-frequency sound absorption in raising.
To achieve the above object, the utility model is achieved through the following technical solutions：
A kind of honeycomb interlayer sound absorption structure of built-in microperforated panel, which is characterized in that by honeycomb core, top panel, lower panel
And internal microperforated panel is constituted, and the honeycomb core is hollow cylinder, internal microperforated panel is set in the cavity of the honeycomb core,
The top panel and lower panel are separately positioned on the top and bottom of honeycomb core, and the internal microperforated panel is constituted with top panel
Air chamber form a double helmholtz resonance chambers, the air chamber that the internal microperforated panel and lower panel are constituted forms one
A resonant cavity, double helmholtz resonance chambers and resonant cavity collectively form the structure with double suction acoustic performance, described to be provided with inside
The honeycomb core of microperforated panel is one group with six and arranges by sequential cycles of group that six s' in same group of honeycomb core is double
Of different sizes, the formation gradient chamber composition quadratic remainder diffuser of helmholtz resonance chamber.
Further, with tangent form close-packed arrays between the honeycomb core.
Further, the top panel is the structure for having carried out micropunch.
Further, the size of the double helmholtz resonance chambers of six in same group of honeycomb core is followed successively by 2:8:4:2:
4:1。
Further, between the upper and lower panel and honeycomb core, between internal microperforated panel and honeycomb core and each
It is all glued connection between honeycomb core.
Further, each section material of honeycomb interlayer sound absorption structure is aluminum alloy materials.
The utility model is round honeycomb sandwich construction.Based on helmholtz resonance chamber principle, by carrying out micro- wear to plate
Hole can increase integrally-built acoustic absorptivity, but it is relatively narrow in middle low frequency absorption frequency band, therefore widen to frequency band needs, and inhale
Sonic system number is lower.Can not only frequency band be widened by the change to internal cellular structure but also maximum acoustic absorptivity can be improved, this is practical new
Type is as starting point, on the one hand can be in upper microperforated panel and chamber below by the way that microperforated panel is arranged to honeycomb core inside
Body forms not contour sub- back air chamber and, in order to provide additional effect of low-frequency sound absorption, widens to form quadratic remainder diffuser
Sound sucting band.On the other hand, sound wave by internal microperforated panel again with below inner perforated plate air chamber formed resonant cavity from
And energy is consumed, improve acoustic absorptivity.The structure need to only increase microperforated panel inside honeycomb core, and operation is comparatively convenient.
The utility model structure is relatively simple, on the basis of original honeycomb sandwich construction, increases some internal micropunch
Plate can improve its peak value that absorbs sound to a certain extent, and effectively widen sound sucting band.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the honeycomb interlayer sound absorption structure of microperforated panel built in the utility model；
Fig. 2 is the arrangement mode schematic diagram of the microperforated panel in one group of inner core；
Fig. 3 is the acoustic absorptivity comparison diagram being arranged before and after internal microperforated panel in corresponding embodiment 1；
Fig. 4 is the acoustic absorptivity comparison diagram being arranged before and after internal microperforated panel in corresponding embodiment 2；
In figure：Microperforated panel on 1., 2. inside microperforated panels, 3. honeycomb cores, 4. lower panels.
Specific embodiment
The utility model is described further now in conjunction with drawings and examples：
Embodiment 1
In Fig. 1, a kind of honeycomb interlayer sound absorption structure of built-in microperforated panel, structure includes upper micropunch panel 1（Figure
In do not show its micropunch）, internal microperforated panel 2, round honeycomb core 3 and lower panel 4, the honeycomb with internal microperforated panel 2
Core 3 is arranged with six for one group, is then a cycle arrangement past with six honeycomb cores 3 with internal microperforated panel 2,
It, can be after one row of vacancy in view of weight and operating reason（Second row is without internal microperforated panel 2 as shown in figure 1）To third row again into
Row arrangement mode identical with first row.
Honeycomb each section material is aluminium alloy material, and each aluminium alloy material is glued connection.Round 3 height of honeycomb core is
60mm, diameter 15mm, wall thickness 0.5mm, upper and lower panel Isosorbide-5-Nitrae thickness is all 0.5mm, the micropunch hole of upper micropunch panel 1
Diameter is 0.5mm, and perforation field rate is 4%, and the diameter of internal microperforated panel 2 is 14mm, with a thickness of 0.5mm, situation of perforating and upper micro-
Perforated panel 1 is identical, and each circle honeycomb core 3 all forms entire honeycomb core so that tangent form is closely coupled, and one group of setting is micro-
After perforated plate 2, internal microperforated panel 2 forms the air chamber of 15,60,30,15,30,7.5mm above, as shown in Fig. 2, upper micro-
Perforated panel 1 and the air cavity composition quadratic remainder diffuser formed below, to widen sound sucting band, internal micropunch face
Plate 2 forms helmholtz resonance chamber with air chamber body below to increase sound absorbing performance.By COMSOL software, by structure
Model is established in pressure acoustic module, and setting Acoustic Boundary Conditions are background pressure field, by the reflected sound for integrating the plane of incidence
Can and incident sound energy, substituting into formula can be obtained acoustic absorptivity, and simulation result is as shown in Figure 3, built-in microperforated panel with without interior
It sets microperforated panel to compare, acoustic absorptivity peak value is improved close to 0.3-0.4, and sound sucting band can at least increase by 1 under OCT measurement method
A bandwidth.
Embodiment 2
Honeycomb, which is constituted, refers to Fig. 1, and each section material is aluminium alloy material, and each aluminium alloy material is glued connection.It is round
3 height of honeycomb core is 60mm, and diameter 15mm, wall thickness 0.5mm, upper and lower panel Isosorbide-5-Nitrae thickness is all 0.5mm, upper micropunch face
The micropunch aperture of plate 1 is 0.5mm, and perforation field rate is 4%, and the diameter of internal microperforated panel 2 is 14mm, with a thickness of 0.5mm,
Penetration hole diameter is 0.2mm, and perforation field rate is 2%, and each circle honeycomb core 3 is all formed entirely so that tangent form is closely coupled
Honeycomb core is arranged after one group of microperforated panel, and internal microperforated panel 2 forms the air of 15,60,30,15,30,7.5mm above
Chamber, corresponding also to form air chamber below, period arrangement mode and sound absorption principle are all identical with embodiment 1.It is soft by COMSOL
Part modeling, process are similar in embodiment 1.As a result it as shown in figure 4, built-in microperforated panel is compared with without built-in microperforated panel, inhales
Sound coefficient peak value improves 0.4-0.5, and sound sucting band can increase by 1.5 bandwidth under at least OCT measurement method, and acoustic absorptivity improves
Significantly, the whole sound absorption effect than 1 structure of embodiment is good, can be used as preferably.
In addition, structural material is chosen, and upper 1 penetration hole diameter of micropunch panel, thickness, 3 height of honeycomb core, internal microperforated panel
2 perforation situation etc. can all be chosen according to the actual situation, and internal 2 position of microperforated panel can also diversification.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
It is any to be transformed or replaced without what creative work was expected in this, it should be covered within the scope of the utility model.
Claims (6)
1. a kind of honeycomb interlayer sound absorption structure of built-in microperforated panel, which is characterized in that by honeycomb core, top panel, lower panel and
Internal microperforated panel is constituted, and the honeycomb core is hollow cylinder, and internal microperforated panel, institute are arranged in the cavity of the honeycomb core
It states top panel and lower panel is separately positioned on the top and bottom of honeycomb core, what the internal microperforated panel and top panel were constituted
Air chamber forms a double helmholtz resonance chamber, and the air chamber that the internal microperforated panel and lower panel are constituted forms one
Resonant cavity, double helmholtz resonance chambers and resonant cavity collectively form the structure with double suction acoustic performance, described provided with internal micro-
The honeycomb core of perforated plate is one group with six and arranges by sequential cycles of group, six double last of the twelve Earthly Branches in same group of honeycomb core
Of different sizes, the formation gradient chamber composition quadratic remainder diffuser of Mu Huozi resonant cavity.
2. a kind of honeycomb interlayer sound absorption structure of built-in microperforated panel according to claim 1, which is characterized in that the bee
With tangent form close-packed arrays between nest core.
3. a kind of honeycomb interlayer sound absorption structure of built-in microperforated panel according to claim 1, which is characterized in that on described
Panel is the structure for having carried out micropunch.
4. a kind of honeycomb interlayer sound absorption structure of built-in microperforated panel according to claim 1, which is characterized in that same group
The size of six double helmholtz resonance chambers in honeycomb core is followed successively by 2:8:4:2:4:1.
5. a kind of honeycomb interlayer sound absorption structure of built-in microperforated panel according to claim 1, which is characterized in that described
Between upper and lower panel and honeycomb core, between internal microperforated panel and honeycomb core and between each honeycomb core be glued connection.
6. a kind of honeycomb interlayer sound absorption structure of built-in microperforated panel according to claim 1, which is characterized in that honeycomb folder
Each section material of layer sound absorption structure is aluminum alloy materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820641406.1U CN208126867U (en) | 2018-05-02 | 2018-05-02 | A kind of honeycomb interlayer sound absorption structure of built-in microperforated panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820641406.1U CN208126867U (en) | 2018-05-02 | 2018-05-02 | A kind of honeycomb interlayer sound absorption structure of built-in microperforated panel |
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| Publication Number | Publication Date |
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| CN208126867U true CN208126867U (en) | 2018-11-20 |
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| CN201820641406.1U Expired - Fee Related CN208126867U (en) | 2018-05-02 | 2018-05-02 | A kind of honeycomb interlayer sound absorption structure of built-in microperforated panel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108346421A (en) * | 2018-05-02 | 2018-07-31 | 南昌航空大学 | A kind of honeycomb interlayer sound absorption structure of built-in microperforated panel |
| CN109584855A (en) * | 2019-01-11 | 2019-04-05 | 南昌航空大学 | Honeycomb-microperforated panel composite structural design method of adjustable sound absorption frequency |
-
2018
- 2018-05-02 CN CN201820641406.1U patent/CN208126867U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108346421A (en) * | 2018-05-02 | 2018-07-31 | 南昌航空大学 | A kind of honeycomb interlayer sound absorption structure of built-in microperforated panel |
| CN108346421B (en) * | 2018-05-02 | 2023-11-21 | 南昌航空大学 | Honeycomb interlayer sound absorption structure with built-in microperforated panel |
| CN109584855A (en) * | 2019-01-11 | 2019-04-05 | 南昌航空大学 | Honeycomb-microperforated panel composite structural design method of adjustable sound absorption frequency |
| CN109584855B (en) * | 2019-01-11 | 2022-11-18 | 南昌航空大学 | Honeycomb-micropunch plate composite structure design method capable of adjusting sound absorption frequency |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181120 Termination date: 20210502 |