CN103072589B - For the microperforated panel cavity resonance sound absorber of high speed train baggage rack - Google Patents
For the microperforated panel cavity resonance sound absorber of high speed train baggage rack Download PDFInfo
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- CN103072589B CN103072589B CN201110413002.XA CN201110413002A CN103072589B CN 103072589 B CN103072589 B CN 103072589B CN 201110413002 A CN201110413002 A CN 201110413002A CN 103072589 B CN103072589 B CN 103072589B
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Abstract
A kind of microperforated panel cavity resonance sound absorber for high speed train baggage rack, comprise described side plate and the micropunch shape structural slab being installed with some holes or narrow slit, the baggage rack supporting plate of described micropunch shape structural slab, described side plate and train forms enclosed cavity jointly.Apparatus of the present invention are the test results according to high speed train real vehicle testing results, design especially for needing the frequency range of emphasis noise reduction in train; Design has adapted to the architectural feature of speed train cars inside, for the feature such as positional structure and frequency noise distribution of the below of high speed train baggage rack, the various porous sound-absorbing materials in original car are replaced with micropunch sound absorber, can under the prerequisite increasing substantially acoustically effective, decreasing pollution and the harm to health, can under the prerequisite increasing substantially acoustically effective, decreasing pollution and the harm to health.
Description
Technical field
The present invention relates to noise control technique field in high-speed train, particularly relate to a kind of microperforated panel cavity resonance sound absorber for high speed train baggage rack.
Background technology
The sound absorption material and structure kind of field of noise control application is a lot, can be divided into three major types according to its sound absorbing mechanism, i.e. porous sound-absorbing material, resonance type sound absorption structure and have the compound sound-absorption structural of both features concurrently.Such as, super glass wool and polyurethane foam etc. belong to porous sound-absorbing material, and thin plate sound absorption structure, film sound absorption structure, perforated plate sound absorber etc. belong to resonance type sound absorption structure, and hang pre-structure as mineral wool board and belong to compound sound-absorption structural.The article about " theory and design of microperforated panel soundabsorbing construction " that Ma Dayou was delivered on " Chinese science " in 1975, formally proposes the concept of " porous plate acoustic adsorption device ", has opened up the application of resonance sound-absorbing structure.Compared with conventional punch plate sound absorption structure, the principal feature of microperforated panel resonance sound-absorbing structure is that diameter is in below 1mm micropore and plate chamber, its sound sucting band width can be better than conventional perforation board resonance sound absorption structure, there is wide sound sucting band characteristic, have a wide range of applications in sqouynd absorption lowering noise and improving in indoor tone quality.Microfracture plate sound absorber is similar to porous plate acoustic adsorption device, and namely micro-pore shape is changed to long and narrow narrow slit, and also just design factor is slightly different for its sound absorption characteristics theoretical formula.In addition, micropunch and micro-seam plate body structure of wearing can be made with multiple material, have the advantages such as high temperature resistant, withstanding corrosion, cleanliness without any pollution, have broad application prospects.
After China's train speed raising, noise problem seems further outstanding, and become the key factor of restriction high-speed rail technology development, noise emission not only has a strong impact on the traveling comfort of quietness in car and occupant, and have impact on the living environment of high ferro area along the line resident.In railway car, the most effective method of Noise measarement is effectively absorbed by the optimization of internal acoustic material and structure and isolated internal main to want vibration and acoustics source.
The below of high speed train baggage rack is one of main sound source centrostigma, and for the feature such as positional structure and frequency noise distribution of the below of high speed train baggage rack, designing nearest sqouynd absorption lowering noise device is one of urgent problem in industry.
Summary of the invention
The object of the invention is to design a kind of novel microperforated panel cavity resonance sound absorber for high speed train baggage rack, solve the problem.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of microperforated panel cavity resonance sound absorber for high speed train baggage rack, comprise described side plate and the micropunch shape structural slab being installed with some holes or narrow slit, the baggage rack supporting plate of described micropunch shape structural slab, described side plate and train forms enclosed cavity jointly.
Described side plate forms a circle and forms side plate cavity, and one end of described side plate cavity is closed with the downside of described train baggage carrier supporting plate and is connected, and the other end of described side plate cavity is closed with described micropunch shape structural slab and is connected.
Described micropunch shape structural slab is microperforated panel, and the thickness of described microperforated panel is 0.01 ~ 10.0mm; The penetration hole diameter of described microperforated panel is 0.1 ~ 1.0mm, percentage of perforation 0.1% ~ 10%.
Thickness 0.1 ~ the 5mm of described microperforated panel; Penetration hole diameter 0.2 ~ 0.8mm on described microperforated panel, described percentage of perforation 0.25% ~ 5%.
Described micropunch shape structural slab is micro-ly wear seam plate, and described micro-thickness wearing seam plate is 0.01 ~ 10.0mm; Described micro-wear seam plate wear seam width be 0.1 ~ 1.0mm; Describedly wear seam rate 0.1% ~ 10%.
Described micro-thickness 0.1 ~ 5mm wearing seam plate; Seam plate wearing seam width 0.2 ~ 0.8mm to described micro-wearing, described in wear seam rate 0.25% ~ 5%.
Described micropunch shape structural slab comprises the first micropunch shape structural slab and the second micropunch shape structural slab, form double-deck micropunch shape structure sound absorber, described second micropunch shape structural slab is between described first micropunch shape structural slab and described train baggage carrier supporting plate; The enclosed cavity degree of depth 10 ~ 400mm between described first micropunch shape structural slab to described baggage rack supporting plate, described second micropunch shape structural slab is apart from described first micropunch shape structural slab distance 5 ~ 100mm.
Described micropunch shape structural slab be equipped with micropunch film or micro-ly wear seam film, or described micropunch shape structural slab micropunch film or micro-seam film of wearing substitute.
Described micropunch shape structural slab is steel plate, iron plate, copper coin, aluminium sheet, stainless steel sheet, plastic flagstone, glass board, PVC board, PE plate or plank; Described micropunch shape structural slab is bonding or be welded on described side plate, with described side sheet room for firmly to contact; Described side plate is with the adhesion of train baggage carrier planker or weld, and is also hard contact.
Perforation on described micropunch shape structural slab or the arrangement mode wearing seam are triangle or the square arrangement mode of rule, or are irregular arrangement mode.
The present invention's so-called micropunch shape structure can be the micropunch of various shape, also can be micro-ly to wear seam, to reach the effect of sound absorption.
So-called percentage of perforation=perforation field/plate area × 100% in the present invention; The present invention is so-called wears seam rate=wear seam area/plate area × 100%.
The present invention proposes a kind of plate chamber resonance sound-absorbing structure of micropunch shape structure, for the frequency band occurring high noise levels during train high-speed cruising, design optimization is carried out to sound absorption structure, finally reach the object of effective sqouynd absorption lowering noise.
Beneficial effect of the present invention is as follows:
(1) apparatus of the present invention are the test results according to high speed train real vehicle testing results, design especially for needing the frequency range of emphasis noise reduction in train; Apparatus of the present invention design has adapted to the architectural feature of speed train cars inside, not affecting under the prerequisite that passenger takes, utilizes space limited in compartment as much as possible.
(2) apparatus of the present invention design has adapted to the architectural feature of speed train cars inside, for the feature such as positional structure and frequency noise distribution of the below of high speed train baggage rack, the various porous sound-absorbing materials in original car are replaced with micropunch sound absorber, can under the prerequisite increasing substantially acoustically effective, decreasing pollution and the harm to health, can under the prerequisite increasing substantially acoustically effective, decreasing pollution and the harm to health.
Accompanying drawing explanation
Fig. 1 is apparatus of the present invention paving location schematic diagrams in high speed train, is mainly laid on below train baggage carrier.
Fig. 2 is micropunch shape structure sound absorber schematic diagram of the present invention, namely the first micropunch shape structural slab of some holes or narrow slit is installed with by one and side plate is formed, be connected with on the downside of baggage rack open for side plate one end during installation, the two and baggage rack supporting plate surround an enclosed cavity.
Fig. 3 is that micropunch shape structure sound absorber of the present invention another kind implements structural representation, namely after the first micropunch shape structural slab, adds the second micropunch shape structural slab.
Fig. 4 is the spectral distribution curve figure of the coefficient of sound-absorption when sound wave normal incidence of the micropunch shape structural slab sound absorption structure described in embodiment 1.
Fig. 5 is the spectral distribution curve figure of the coefficient of sound-absorption when sound wave normal incidence of the double-deck micropunch shape structural slab sound absorption structure described in embodiment 2.
Fig. 6 is the test curve of the boring copper micropunch shape structural slab sample coefficient of sound-absorption described in embodiment 3.
Fig. 7 is the micro-test result of wearing seam plate structure coefficient of sound-absorption described in embodiment 4.
1, the first hole or narrow slit 2, first micropunch shape structural slab 3, side plate 4, second hole or narrow slit 5, second micropunch shape structural slab 6, baggage rack supporting plate 7, train top ceiling 8, train floor 9, be layed in micropunch shape structural slab sound absorption structure 10, the train skirtboard at train baggage carrier place
Detailed description of the invention
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1:
With reference to figure 2, the present embodiment has made a kind of micropunch shape structural slab sound absorption structure of the present invention.The first micropunch shape structural slab 2 that this device is done by organism glass and side plate 3 form, the two and baggage rack planker form enclosed cavity jointly, the degree of depth of this enclosed cavity is 40mm, thickness is 0.4mm, first micropunch shape structural slab 1 is provided with the first hole 4, first hole minor diameter is 0.4mm, and the first hole 4 puncturing fraction is the arrangement mode of the first hole 4 on the 0.785, first micropunch shape structural slab 1 is regular square arrangement.According to the coefficient of sound-absorption spectrum curve of the micropunch shape structural slab structure of embodiment 1 parameter designing as shown in Figure 4.As we can see from the figure, frequency is when about 800Hz, and coefficient of sound-absorption reaches maxim, and coefficient of sound-absorption is herein greater than 0.9.According to found that of high speed train real vehicle testing results in the past, one of this frequency range that internal car noise level is higher just.
Embodiment 2:
With reference to figure 3, the present embodiment has made a kind of micropunch shape structural slab sound absorption structure of the present invention.The micropunch shape structural slab 2 and 5 that this device is made by transparent organic glass, train baggage carrier supporting plate 6, side plate 3 and the enclosed cavity formed.The degree of depth of ground floor micropunch shape structural slab enclosed cavity is 20mm, thickness is 0.4mm, first micropunch shape structural slab 2 is provided with the first hole 1, first hole 1 diameter is 0.4mm, and the first hole 1 puncturing fraction is 0.785, and the degree of depth of second layer micropunch shape structural slab enclosed cavity is 30mm, thickness is 0.4mm, it is 0.4mm that second micropunch shape structural slab 5 is provided with the second hole 4, second hole 4 diameter, and the second hole 4 puncturing fraction is 0.785.On micropunch shape structural slab 5, on the second hole 4 and micropunch shape structural slab 2, the first hole 1 arrangement mode is the square arrangement of rule.According to the coefficient of sound-absorption spectrum curve of the micropunch shape structural slab structure of embodiment 2 parameter designing as shown in Figure 4.As we can see from the figure, frequency is when about 600Hz and 1600Hz, and coefficient of sound-absorption reaches peak value.According to found that of high speed train real vehicle testing results in the past, one of this frequency range that internal car noise level is higher just.
Embodiment 3:
Be the bit bore of 0.2mm or the method processed sample of sewing-needle and needle punching with diameter.Material can aluminium alloy sheets, copper coin, stainless steel sheet and plastic flagstone etc.Penetration hole diameter 0.2mm on micropunch shape structural slab, the thickness of micropunch shape structural slab or perforated longer 0.06mm, pitch of holes 4mm on micropunch shape structural slab, between side plate and railway car, baggage rack supporting plate forms the degree of depth 60mm of enclosed cavity jointly, Fig. 6 is the test results of boring copper coin sample, and the test results of these samples is all greater than 2 octaves.
Embodiment 4:
Make the micro-of certain material and wear seam plate, wherein stitch long 2.5mm, stitch wide 0.4mm, stitch dark 1.6mm, kerf spacing 5nm, wear seam rate 4%, stitch rear cavity 340mm, stitch with square arrangement.Fig. 7 is micro-test results of wearing seam plate, and test results shows that this sample is better at special frequency band acoustically effective.
The present invention is described in detail in preferred embodiment above by concrete; but those skilled in the art should be understood that; the present invention is not limited to the above embodiment; within the spirit and principles in the present invention all; any amendment of doing, equivalent replacement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the microperforated panel cavity resonance sound absorber for high speed train baggage rack, it is characterized in that: comprise side plate and the micropunch shape structural slab being installed with some holes or narrow slit, the baggage rack supporting plate of described micropunch shape structural slab, described side plate and train forms enclosed cavity jointly;
Described side plate forms a circle and forms side plate cavity, and one end of described side plate cavity is closed with the downside of described train baggage carrier supporting plate and is connected, and the other end of described side plate cavity is closed with described micropunch shape structural slab and is connected;
Described micropunch shape structural slab is microperforated panel, and the thickness of described microperforated panel is 0.01 ~ 0.4mm, and the penetration hole diameter on described microperforated panel is 0.2 ~ 0.4mm, percentage of perforation 0.1% ~ 0.785%;
Or described micropunch shape structural slab is micro-ly wear seam plate, described micro-thickness wearing seam plate is 0.01 ~ 10.0mm; Described micro-wear seam plate wear seam width be 0.1 ~ 1.0mm; Described micro-wear seam plate wear seam rate 0.1% ~ 10%;
Described micropunch shape structural slab be equipped with micropunch film or micro-ly wear seam film, or described micropunch shape structural slab micropunch film or micro-seam film of wearing substitute;
Described micropunch shape structural slab comprises the first micropunch shape structural slab and the second micropunch shape structural slab, form double-deck micropunch shape structure sound absorber, described second micropunch shape structural slab is between described first micropunch shape structural slab and described train baggage carrier supporting plate; The enclosed cavity degree of depth 10 ~ 400mm between described first micropunch shape structural slab to described baggage rack supporting plate, described second micropunch shape structural slab is apart from described first micropunch shape structural slab distance 5 ~ 100mm.
2. the microperforated panel cavity resonance sound absorber for high speed train baggage rack according to claim 1, is characterized in that: described micro-thickness 0.1 ~ 5mm wearing seam plate; Seam plate wearing seam width 0.2 ~ 0.8mm to described micro-wearing, described in wear seam rate 0.25% ~ 5%.
3. the microperforated panel cavity resonance sound absorber for high speed train baggage rack according to claim 1 and 2, is characterized in that: described micropunch shape structural slab is iron plate, copper coin, aluminium sheet, stainless steel sheet, glass board, PVC board, PE plate or plank; Described micropunch shape structural slab is bonding or be welded on described side plate, with described side sheet room for firmly to contact; Described side plate is with the adhesion of train baggage carrier planker or weld, and is also hard contact.
4. the microperforated panel cavity resonance sound absorber for high speed train baggage rack according to claim 1 and 2, it is characterized in that: the perforation on described micropunch shape structural slab or the arrangement mode wearing seam are triangle or the square arrangement mode of rule, or are irregular arrangement mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110413002.XA CN103072589B (en) | 2011-12-13 | 2011-12-13 | For the microperforated panel cavity resonance sound absorber of high speed train baggage rack |
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| CN201110413002.XA CN103072589B (en) | 2011-12-13 | 2011-12-13 | For the microperforated panel cavity resonance sound absorber of high speed train baggage rack |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018085249A1 (en) | 2016-11-04 | 2018-05-11 | Corning Incorporated | Micro-perforated panel systems, applications, and methods of making micro-perforated panel systems |
| JP6932588B2 (en) * | 2017-09-15 | 2021-09-08 | 株式会社総合車両製作所 | Luggage racks and railcars |
| CN109555234A (en) * | 2017-09-25 | 2019-04-02 | 北京市劳动保护科学研究所 | A method of making microperforated panel |
| CN108665886A (en) * | 2018-05-23 | 2018-10-16 | 南京邮电大学 | A kind of ultra-thin perforation plate absorbing body of rigidity with resonance sound-absorbing structure |
| CN109300463B (en) * | 2018-09-19 | 2021-04-16 | 河海大学常州校区 | Composite micro-perforated plate sound absorption structure for inhibiting nonlinear effect under high sound intensity |
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| CN2316357Y (en) * | 1997-12-10 | 1999-04-28 | 北京市劳动保护科学研究所 | Composite micro-holey diaphragm sound absorption structure of holey lining board |
| JP2006106423A (en) * | 2004-10-06 | 2006-04-20 | Kobe Steel Ltd | Sound-absorbing material and sound-absorbing panel |
| CN101989420A (en) * | 2009-08-03 | 2011-03-23 | 吴哲 | Method for machining microcrack or micropore array and product thereof |
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| CN2123564U (en) * | 1991-09-13 | 1992-12-02 | 王法源 | High-damped wide frequeney band sound absorption wall |
| US6675551B1 (en) * | 1998-09-02 | 2004-01-13 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Plate-shaped constructional element and method |
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