CN103072589A - Micro-perforated plate cavity resonance sound absorption device for high-speed train baggage rack - Google Patents
Micro-perforated plate cavity resonance sound absorption device for high-speed train baggage rack Download PDFInfo
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- CN103072589A CN103072589A CN201110413002XA CN201110413002A CN103072589A CN 103072589 A CN103072589 A CN 103072589A CN 201110413002X A CN201110413002X A CN 201110413002XA CN 201110413002 A CN201110413002 A CN 201110413002A CN 103072589 A CN103072589 A CN 103072589A
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Abstract
A micro-perforated plate cavity resonance sound absorption device for a high-speed train baggage rack comprises a lateral plate and a micro-perforated structure plate provided with a plurality of holes and narrow slits. A closed cavity is formed by the micro-perforated structure plate, the lateral plate and a train baggage rack supporting plate together. The micro-perforated plate cavity resonance sound absorption device is designed specially aiming at frequency range where noise reduction is intensively needed, in a train according to test results of running tests of the real high-speed train, adapts to internal structural features of the internal of a high-speed train coach Aiming at a structure, noise frequency distribution and the other characteristics of the position below the high-speed train baggage rack, the micro-perforated sound absorption device replaces original various porous sound absorbing materials in the train, and the micro-perforated plate cavity resonance sound absorption device can reduce pollution and damage to human health under the premise of improving the sound absorption effect by a large margin.
Description
Technical field
The present invention relates to noise control technique field in the high-speed train, particularly relate to a kind of microperforated panel cavity resonance sound-absorbing device for the high speed train baggage rack.
Background technology
The sound absorption material and structure kind that field of noise control is used 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 characteristics concurrently.For example, super glass wool and polyurethane foam etc. belongs to porous sound-absorbing material, and thin plate sound absorption structure, film sound absorption structure, perforated plate sound absorber etc. belong to the resonance type sound absorption structure, belong to compound sound-absorption structural and hang pre-structure as mineral wool board.The article about " theory and design of microperforated panel soundabsorbing construction " that Ma Dayou was delivered at " Chinese science " in 1975 has formally proposed the concept of " porous plate acoustic adsorption device ", has opened up the application of resonance sound-absorbing structure.Compare with common sound absorbent perforated structure, the principal feature of microperforated panel resonance sound-absorbing structure is that diameter is in the following micropore of 1mm and plate chamber, its sound sucting band width can be better than conventional perforation board resonance sound absorption structure, has wide sound sucting band characteristic, in sqouynd absorption lowering noise with improve and have a wide range of applications aspect the indoor tone quality.The 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 little 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.
Noise problem seems further outstanding behind China's train speed raising, has become the key factor of restriction high-speed rail technology development, and noise emission not only has a strong impact on the interior quietness of car and occupant's traveling comfort, and has affected high ferro area along the line resident's living environment.To control effective method be effectively to absorb and isolate internal main and want the vibration and acoustics source by inner acoustical material and structural optimization to noise in the railway car.
The below of high speed train baggage rack is one of main sound source centrostigma, and for characteristics such as the positional structure of the below of high speed train baggage rack and frequency noise distributions, designing nearest sqouynd absorption lowering noise device is one of urgent problem in the industry.
Summary of the invention
The object of the invention is to design a kind of novel microperforated panel cavity resonance sound-absorbing device that is used for the high speed train baggage rack, address the above problem.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of microperforated panel cavity resonance sound-absorbing device for the high speed train baggage rack, comprise described side plate and the micropunch shape structural slab that is 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 the side plate cavity, and an end of described side plate cavity is connected with the sealing of the downside of described train baggage carrier supporting plate, and the other end of described side plate cavity is connected with described micropunch shape structural slab sealing.
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 the described microperforated panel, described percentage of perforation 0.25%～5%.
Described micropunch shape structural slab is little seam plate of wearing, and described little thickness of wearing the seam plate is 0.01～10.0mm; Described little wear the seam plate wear the seam width be 0.1～1.0mm; The described seam rate 0.1%～10% of wearing.
Described little thickness 0.1～5mm that wears the seam plate; Described little seam of wearing being worn seam width 0.2～0.8mm, the described seam rate 0.25%～5% of wearing on the plate.
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 the second micropunch shape structural slab is between described the first micropunch shape structural slab and described train baggage carrier supporting plate; Described the first micropunch shape structural slab is to the enclosed cavity degree of depth 10～400mm between the described baggage rack supporting plate, and described the second micropunch shape structural slab is apart from described the first micropunch shape structural slab distance 5～100mm.
Be equipped with micropunch film or little seam film of wearing on the described micropunch shape structural slab, perhaps described micropunch shape structural slab substitutes with micropunch film or little seam film of wearing.
Described micropunch shape structural slab is steel plate, iron plate, copper coin, aluminium sheet, stainless steel sheet, plastic flagstone, glass board, PVC plate, PE plate or plank; Described micropunch shape structural slab is bonding or be welded on the described side plate, with described side sheet room for firmly to contact; Described side plate and the adhesion of train baggage carrier planker or welding also are hard contact.
Perforation on the described micropunch shape structural slab or the arrangement mode of wearing seam are triangle or the square arrangement mode of rule, or are irregular arrangement mode.
The so-called micropunch shape of the present invention structure can be the micropunch of various shapes, also can be little seam of wearing, to reach the effect of sound absorption.
So-called percentage of perforation=perforation field among the present invention/plate area * 100%; The present invention is so-called to wear 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, occur the frequency band of high noise levels during for the train high-speed cruising, sound absorption structure is carried out design optimization, finally reach the purpose 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 operation test, for the frequency range institute special design that needs the emphasis noise reduction in the train; Apparatus of the present invention designs has adapted to the architectural feature of speed train cars inside, not affecting under the prerequisite that the passenger takes, utilizes as much as possible space limited in the compartment.
(2) apparatus of the present invention design has adapted to the architectural feature of speed train cars inside, for characteristics such as the positional structure of the below of high speed train baggage rack and frequency noise distributions, replace various porous sound-absorbing materials in original car with the micropunch sound absorber, can increase substantially under the prerequisite of acoustically effective, reduce to pollute and to the harm of health, can increase substantially under the prerequisite of acoustically effective, reduce pollute and to the harm of health.
Description of drawings
Fig. 1 is apparatus of the present invention paving location scheme drawings in high speed train, mainly is laid on the train baggage carrier below.
Fig. 2 is micropunch shape structure sound absorber scheme drawing of the present invention, namely consisted of by the first micropunch shape structural slab and a side plate that is installed with some holes or narrow slit, during installation the open end of side plate is linked to each other with the baggage rack downside, the two and baggage rack supporting plate surround an enclosed cavity.
Fig. 3 is the another kind of structural representation of implementing of micropunch shape structure sound absorber of the present invention, namely adds the second micropunch shape structural slab behind the first micropunch shape structural slab.
Fig. 4 is the spectral distribution curve figure of embodiment 1 described micropunch shape structural slab sound absorption structure coefficient of sound-absorption when sound wave normal incidence.
Fig. 5 is the spectral distribution curve figure of embodiment 2 described double-deck micropunch shape structural slab sound absorption structures coefficient of sound-absorption when sound wave normal incidence.
Fig. 6 is the test curve of embodiment 3 described boring copper micropunch shape structural slab sample coefficient of sound-absorptions.
Fig. 7 is embodiment 4 described little test results of wearing seam plate structure coefficient of sound-absorption.
1, the first hole or narrow slit 2, the first micropunch shape structural slab 3, side plate 4, the second hole or narrow slit 5, the 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
The specific embodiment
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearer, 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, is not intended to limit the present invention.
Embodiment 1:
With reference to figure 2, present embodiment has been made a kind of micropunch shape structural slab sound absorption structure of the present invention.The first micropunch shape structural slab 2 and side plate 3 that this device is done by organism glass form, the two and baggage rack planker consist of enclosed cavity jointly, the degree of depth of this enclosed cavity is 40mm, thickness is 0.4mm, the first micropunch shape structural slab 1 is provided with the first hole 4, the first hole minor diameter is 0.4mm, and the first hole 4 perforation percentage are that the arrangement mode of the first hole 4 on 0.785, the first micropunch shape structural slab 1 is the square arrangement of rule.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 the 800Hz left and right sides, and coefficient of sound-absorption reaches maxim, and coefficient of sound-absorption herein is greater than 0.9.Found that one of this frequency range that internal car noise level is higher just according to what in the past high speed train real vehicle operation was tested.
Embodiment 2:
With reference to figure 3, present embodiment has been made a kind of micropunch shape structural slab sound absorption structure of the present invention.This device is by micropunch shape structural slab 2 and 5, train baggage carrier supporting plate 6, the side plate 3 of transparent organic glass making and the enclosed cavity that forms.The degree of depth of ground floor micropunch shape structural slab enclosed cavity is 20mm, thickness is 0.4mm, the first micropunch shape structural slab 2 is provided with the first hole 1, the first hole 1 diameter is 0.4mm, and the first hole 1 perforation percentage 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 the second micropunch shape structural slab 5 is provided with the second hole 4, the second holes 4 diameters, and the second hole 4 perforation percentage are 0.785.On the micropunch shape structural slab 5 on the second hole 4 and the micropunch shape structural slab 2 the first hole 1 arrangement mode be the rule square arrangement.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 600Hz and the 1600Hz left and right sides, and coefficient of sound-absorption reaches peak value.Found that one of this frequency range that internal car noise level is higher just according to what in the past high speed train real vehicle operation was tested.
Embodiment 3:
Be the bit bore of 0.2mm or the method processed sample of sewing-needle and needle punching with diameter.Material can the aluminium alloy sheets, copper coin, stainless steel sheet and plastic flagstone etc.Penetration hole diameter 0.2mm on the micropunch shape structural slab, the thickness of micropunch shape structural slab or perforation length 0.06mm, pitch of holes 4mm on the micropunch shape structural slab, the baggage rack supporting plate forms the degree of depth 60mm of enclosed cavity jointly between side plate and railway car, 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 little seam plate of wearing of certain material, the long 2.5mm of its centre joint, stitch wide 0.4mm, stitch dark 1.6mm, kerf spacing 5nm, wear cavity 340mm behind seam rate 4%, the seam, stitch with square arrangement.Fig. 7 is little test results of wearing the seam plate, and test results shows that this sample is better at the special frequency band acoustically effective.
More than by the detailed description of concrete and preferred embodiment the present invention; 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 modification of doing, be equal to replacement etc., all should be included within protection scope of the present invention.
Claims (10)
1. microperforated panel cavity resonance sound-absorbing device that is used for the high speed train baggage rack, it is characterized in that: comprise described side plate and the micropunch shape structural slab that is 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.
2. the microperforated panel cavity resonance sound-absorbing device for the high speed train baggage rack according to claim 1, it is characterized in that: described side plate forms a circle and forms the side plate cavity, one end of described side plate cavity is connected with the sealing of the downside of described train baggage carrier supporting plate, and the other end of described side plate cavity is connected with described micropunch shape structural slab sealing.
3. the microperforated panel cavity resonance sound-absorbing device for the high speed train baggage rack according to claim 1, it is characterized in that: 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%.
4. the microperforated panel cavity resonance sound-absorbing device for the high speed train baggage rack according to claim 3 is characterized in that: the thickness 0.1～5mm of described microperforated panel; Penetration hole diameter 0.2～0.8mm on the described microperforated panel, described percentage of perforation 0.25%～5%.
5. the microperforated panel cavity resonance sound-absorbing device for the high speed train baggage rack according to claim 1, it is characterized in that: described micropunch shape structural slab is little seam plate of wearing, described little thickness of wearing the seam plate is 0.01～10.0mm; Described little wear the seam plate wear the seam width be 0.1～1.0mm; The described seam rate 0.1%～10% of wearing.
6. the microperforated panel cavity resonance sound-absorbing device for the high speed train baggage rack according to claim 5 is characterized in that: described little thickness 0.1～5mm that wears the seam plate; Described little seam of wearing being worn seam width 0.2～0.8mm, the described seam rate 0.25%～5% of wearing on the plate.
7. according to claim 1 to 6 one of any described microperforated panel cavity resonance sound-absorbing devices for the high speed train baggage rack, it is characterized in that: 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 the second micropunch shape structural slab is between described the first micropunch shape structural slab and described train baggage carrier supporting plate; Described the first micropunch shape structural slab is to the enclosed cavity degree of depth 10～400mm between the described baggage rack supporting plate, and described the second micropunch shape structural slab is apart from described the first micropunch shape structural slab distance 5～100mm.
8. according to claim 1 to 6 one of any described microperforated panel cavity resonance sound-absorbing devices for the high speed train baggage rack, it is characterized in that: be equipped with micropunch film or little seam film of wearing on the described micropunch shape structural slab, perhaps described micropunch shape structural slab substitutes with micropunch film or little seam film of wearing.
9. according to claim 1 to 6 one of any described microperforated panel cavity resonance sound-absorbing devices for the high speed train baggage rack, it is characterized in that: described micropunch shape structural slab is steel plate, iron plate, copper coin, aluminium sheet, stainless steel sheet, plastic flagstone, glass board, PVC plate, PE plate or plank; Described micropunch shape structural slab is bonding or be welded on the described side plate, with described side sheet room for firmly to contact; Described side plate and the adhesion of train baggage carrier planker or welding also are hard contact.
10. according to claim 1 to 6 one of any described microperforated panel cavity resonance sound-absorbing devices for the high speed train baggage rack, it is characterized in that: the perforation on the described micropunch shape structural slab or the arrangement mode of 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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109300463A (en) * | 2018-09-19 | 2019-02-01 | 河海大学常州校区 | The compound microperforated panel soundabsorbing construction of nonlinear effect under a kind of inhibition high sound intensity |
| 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 |
| JP2019051856A (en) * | 2017-09-15 | 2019-04-04 | 株式会社総合車両製作所 | Baggage rack and railroad vehicle |
| US11608291B2 (en) | 2016-11-04 | 2023-03-21 | Corning Incorporated | Micro-perforated panel systems, applications, and methods of making micro-perforated panel systems |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11608291B2 (en) | 2016-11-04 | 2023-03-21 | Corning Incorporated | Micro-perforated panel systems, applications, and methods of making micro-perforated panel systems |
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| 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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