CN108385849A - Three-dimensional alliteration impedance micropunch period ultrabroad band flush sound absorption structure - Google Patents
Three-dimensional alliteration impedance micropunch period ultrabroad band flush sound absorption structure Download PDFInfo
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- CN108385849A CN108385849A CN201711119895.0A CN201711119895A CN108385849A CN 108385849 A CN108385849 A CN 108385849A CN 201711119895 A CN201711119895 A CN 201711119895A CN 108385849 A CN108385849 A CN 108385849A
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 27
- 230000000737 periodic effect Effects 0.000 claims abstract description 3
- 238000010276 construction Methods 0.000 claims description 3
- 230000001413 cellular effect Effects 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 9
- 238000004140 cleaning Methods 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 description 7
- 239000002657 fibrous material Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000011358 absorbing material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000011494 foam glass Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000748 cardiovascular system Anatomy 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B1/8404—Sound-absorbing elements block-shaped
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0023—Details, e.g. foundations
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
- E01F8/0064—Perforated plate or mesh, e.g. as wall facing
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8457—Solid slabs or blocks
- E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Building Environments (AREA)
Abstract
The present invention relates to a kind of three-dimensional double impedance micropunch period ultrabroad band sound absorption structures.The closed cavity of periodic arrangement in 2 orthogonal directions is connected to form by micropunch panel, unit midfeather, unit diaphragm plate, unit baseboard, left side, right side, front end face, rear end face, by two kinds of depth cavity mechanical periodicities, larger depth is 1.5 ~ 4.5 times of smaller depth.0.3%~4% micropore that occupied area is panel area is distributed on micropunch panel, micropore size is 0.3~1.2mm, and cell width and length are no more than 0.15m.As long as the present invention to be installed to the place for the processing that needs to absorb sound when use, it is fixed on wall surface.Apparatus of the present invention are simple, simple processing, thin type is light, and sound absorbing performance is excellent, sound sucting band width of the acoustic absorptivity in 2.5KHz more than 0.8 is up to 2 ~ 3 octaves, sound sucting band of the acoustic absorptivity not less than 0.6 is close to 3 octaves, and for peak value close to 1.0, sound absorbing performance is flat, it is widely applicable, easy cleaning, high temperature resistant, and there is superior weatherability, it can recycle completely.
Description
Technical field
The invention belongs to technical field of acoustics, specially a kind of three-dimensional alliteration impedance micropunch period reduced for noise is super
Broadband flush sound absorption structure.
Background technology
Problem of noise pollution is with the development of urban economy and the growth getting worse of population, shadow of the noise pollution to people
It rings caused complaint and accounts for 50% or more that all kinds of environment are complained in economically developed city.With the propulsion of Process of Urbanization Construction, no
Breaking increased social activities and uses equipment to make the living environment low frequency characteristic of people apparent, this just often results in ambient noise
Sound pressure level when being also not up to standard limited value, subjective sensation is worried by people.Low-frequency noise can generate the thinking ability of people
It interferes significantly with, influences the auditory system, nervous system and cardiovascular system of people.Therefore low-frequency noise is ground in recent ten years
Study carefully and earn widespread respect, the research of low-frequency sound-absorbing structure is one of hot spot therein.
Sound absorption structure is one of the important measures in noise control technique.Traditional sound absorption structure be mostly hole fibrous material such as
Mineral wool, rock wool etc., additional perforated face plate.Porous fibrous material has the advantages that sound absorbing performance is good, but that there are weatherabilities is poor,
Sound absorbing performance fails and is used for a long time fiber generation the problem of flying upward, causing secondary pollution after being moistened, is produced to health
Raw harm.Usual porous fibrous material needs to be replaced after a period of use, and can also be endangered in production, process fiber
Human body.Due to resonance sound-absorbing structure moisture resistant, hygiene, environmental-friendly etc. than conventional porous fibrous material have it is excellent
More property, has been more and more widely used, and has the trend of substitution traditional fibre material.The mechanism of novel resonance sound-absorbing structure,
Computation model and development and application also always constantly develop it is perfect.
With the enhancing and improvement of living standard of people's environmental consciousness, no fiber absorbing material is more and more weighed
Depending on the trend for gradually replacing traditional porous fibrous material is presented.What is developed at present mainly has micro- wear without fiber absorbing material
Hole sound absorber, aluminum fabric acoustic absorption material, foaming aluminum sound-absorbing material, foam glass, polyurethane sound absorption foam etc..Foam glass is deposited
In frangible disadvantage, for acoustic absorptivity 0.4~0.6, sound sucting band is relatively narrow.Polyurethane sound absorption foam, which exists, is unable to high temperature resistant, resistance to
The shortcomings of time property is poor.The processing of microperforated panel structure is simple, is not necessarily to interior filling chock material, enough acoustic resistances is generated by micropore, with cavity shape
At resonance sound-absorbing structure.But it is limited by processing technology, the aperture of metal microperforated panel is usually in 0.5mm ~ 1mm, single layer micropunch
The sound sucting band of harden structure is very narrow, is usually no more than 1 octave.The sound sucting band of multilayer microperfrated structure is expanded, but
Typically not greater than 2 octaves.
But for the normal resonant sound absorption structure of single cavity, there is good sound absorbing performance in low frequency, it is necessary to substantially
Degree increases cavity depth, and the scale of construction is often very big.In addition, the sound sucting band of the normal resonant sound absorption structure of single cavity is relatively narrow, it is right
The microperforated panel for being 1mm in aperture, half wide band sound absorption (acoustic absorptivity >=0.5) are typically less than 2 octaves.Absorb sound frequency requirement
It is lower, the thickness of sound absorption structure often require that it is bigger, under the occasion that space is generally restricted, normal resonant sound absorption structure without
Method meets the actual needs of noise abatement well.
For this purpose, the research and design of the good small size novel low-frequency resonance sound-absorbing structure of sound absorbing performance are always acoustics neck
The hot and difficult issue in domain.By the single layer perforated microstructure of two kinds of acoustic impedances, the period is arranged side by side in one direction, and acoustic impedance variation causes
Scattering significantly affect the sound absorption characteristics of structure.Integrally-built sound sucting band can be made notable in the case of impedance matching
It widens, effective sound sucting band of 0.8 or more acoustic absorptivity is up to 3 octaves, and peak value is close to 1.0, and low frequency absorption performance is aobvious
It writes and improves.
Structure processing is simple, and simple installation is not necessarily to any porous fibre sound-absorbing material, and sound absorbing performance is superior.
Invention content
It is an object of the invention to propose a kind of ultrabroad band, high acoustic absorption coefficient, device are simple, easy to clean alliteration resistance
Anti- mechanical periodicity micropunch wideband flush sound absorption structure, suitable for each occasion for needing noise reduction, especially 2.5KHz is below
Noise.
Three-dimensional alliteration impedance micropunch period ultrabroad band sound absorption structure proposed by the present invention, includes the list of rectangular parallelepiped structure
First A closed cavities 11 and unit B closed cavity 12, in the unit A closed cavities 11 adjacent with unit B closed cavity 12 two
Replace periodic arrangement on a direction to obtain；
Unit A closed cavities 11 are by unit A micropunch panel 1, rear end face 4, left side 5, unit midfeather 7, unit midfeather 8
Be connected to form with unit A bottom plates 9, unit A micropunch panel 1 and unit A bottom plates 9 be separately connected 4 side of rear end face, left side 5,
7 side of unit midfeather, 8 side of unit diaphragm plate；After staggeredly, before unit A micropunch panel 1 and unit A bottom plates 9 are separately connected
3 side of end face, right side 6,7 side of unit midfeather, 8 side of unit diaphragm plate；
Unit B closed cavity 12 is by unit B micropunch panel 2, rear end face 4, right side 6, unit midfeather 7, unit midfeather 8
It is connected to form with unit B bottom plate 10；Unit B micropunch panel 2 and unit B bottom plate 10 are separately connected 4 side of rear end face, right side
6,7 side of unit midfeather, 8 side of unit diaphragm plate；After staggeredly, unit B micropunch panel 2 and unit B bottom plate 10 connect respectively
Connect 3 side of front end face, left side 5,7 side of unit midfeather, 8 side of unit diaphragm plate；
2 flush with outer surface of unit A micropunch panel 1 and unit B micropunch panel；
Unit A micropores 13 are distributed on unit A micropunch panel 1, the area shared by unit A micropores 13 is the micropunch faces unit A
Unit B micropore 14, the face shared by unit B micropore 14 is distributed on unit B micropunch panel 2 in the 0.3%~4% of 1 gross area of plate
Product is the 0.3%~4% of 2 gross area of unit B micropunch panel；Micropore 13 is different with the perforation field accounting of micropore 14.Unit A
The cavity depth of closed cavity 11 and unit B closed cavity 12 changes in binary cycle.
In the present invention, the aperture of unit A micropores 13 and unit B micropore 14 is 0.2 ~ 1.2mm.
In the present invention, the distance of unit A micropunch panel 1 to unit A bottom plates 9 is unit B micropunch panel 2 and unit B
1.5-4.5 times of the distance of bottom plate 10.
In the present invention, unit A micropunch panel 1 arrives the distance of unit A bottom plates 9, is no more than 350mm.
In the present invention, the width and length of unit A closed cavities 11 and unit B closed cavity 12 are no more than 15cm.
The present invention has the advantages that acoustic absorptivity height, acoustic frequency bandwidth.In the frequency range within 150Hz~2.5KHz
Preferable sound absorbing performance is all had, most of noise sources, the especially stronger noise source of middle low-frequency component, noise drop can be suitable for
Low significant effect.
Since the sound absorber of the present invention is formed using metal material or nonmetallic materials thin plate punching processing, have
Easy processing, easy cleaning, high temperature resistant, and there is superior weatherability, it can recycle completely, it is entirely avoided traditional fibre material
The problem of existing weatherability and secondary pollution, has superior environment-friendly function.
Using simple installation of the present invention, as long as attaching it to the place for the processing that needs to absorb sound.
The beneficial effects of the present invention are：Middle low frequency absorption frequency band is significantly widened, low frequency absorption coefficient in raising.
Device is simple, and thin type is light, and sound absorbing performance is good, and simple processing is of low cost, and acoustic absorptivity is more than 0.8 suction
Sonic-frequency band width has superior weatherability up to 3 octaves, widely applicable, easy cleaning, high temperature resistant, can recycle profit completely
The problem of with, it is entirely avoided secondary pollution, has superior environment-friendly function.
Description of the drawings
Fig. 1 is front view of the present invention.
Fig. 2 is A-A sectional views of the present invention.
Fig. 3 is B-B sectional views of the present invention.
Fig. 4 is the sound absorbing performance of embodiment 1.
Figure label：1 is unit A micropunch panels, and 2 be unit B micropunch panel, and 3 be front end face, and 4 be rear end face, 5
For left side, 6 be right side, and 7 be unit midfeather, and 8 be unit diaphragm plate, and 9 be unit A bottom plates, and 10 be unit B bottom plate, 11
It is unit B closed cavity for unit A closed cavities, 12,13 be unit A micropores, and 14 be unit B micropore.
Specific implementation mode
The embodiment that the invention is further illustrated by the following examples.
Embodiment 1：Following each component is connected by mode shown in Fig. 1 ~ Fig. 2, field technology personnel can smoothly implement.
Unit A micropunch panel 1, unit B micropunch panel 2, front end face 3, rear end face 4, left side 5, right side 6, unit midfeather
7, unit diaphragm plate 8, bottom plate/9 unit A, unit B bottom plate 10 are connected, component units A closed cavities 11 and unit B closed cavity
12.For unit A micropunch panel 1 using the alumina plate of 0.5 ~ 0.7mm thickness, size is long 0.1m, wide 0.1m, unit A micropunch
The unit A micropores 13 that 1500 ~ 3500 apertures are 0.5 ~ 0.7mm are distributed on panel 1.The use of unit B micropunch panel 2 0.6 ~
The alumina plate of 0.8mm thickness, size are long 0.1m, wide 0.1m, and unit 1500 ~ 3500 is distributed on unit B micropunch panel 2
Aperture is the unit B micropore 14 of 0.6 ~ 0.8mm.Unit A micropores panel 1 is 20 ~ 25cm, unit B at a distance from unit A bottom plates 9
Micropore panel 2 is 5 ~ 10cm at a distance from unit B bottom plate 10.
Front end face 3, rear end face 4, left side 5, right side 6, unit midfeather 7, unit diaphragm plate 8, unit A bottom plates 9, list
First B bottom plates 10 use 1mm steel plates.Front end face 3 is parallel with rear end face 4, and left side 5 is parallel with right side 6, and left side 5 is with before
End face 3, unit A micropunch panel 1, unit A bottom plates 9 are vertical.Right side 6 and front end face 3, unit B micropunch panel 2, unit B
Bottom plate 10 is vertical.
As shown in figure 4, the sound absorbing performance of embodiment 1 is in 220Hz or more reachable 0.8,200Hz or more is up to 0.6.
Claims (6)
1. three-dimensional alliteration impedance micropunch period ultrabroad band sound absorption structure, it is characterised in that the unit A including rectangular parallelepiped structure
Closed cavity (11) and unit B closed cavity (12), in the unit A closed cavities (11) and unit B closed cavity (12) phase
Alternately periodic arrangement obtains in adjacent both direction；
Unit A closed cavities (11) by unit A micropunch panel (1), rear end face (4), left side (5), unit midfeather (7),
Unit midfeather (8) and unit A bottom plates (9) are connected to form, and unit A micropunch panel (1) and unit A bottom plates (9) are separately connected
Rear end face (4) side, left side (5), unit midfeather (7) side and unit diaphragm plate (8) side；After staggeredly, unit A is micro- to be worn
Hole panel (1) and unit A bottom plates (9) are separately connected front end face (3) side, right side (6), unit midfeather (7) side and list
First diaphragm plate (8) side；
Unit B closed cavity (12) by unit B micropunch panel (2), rear end face (4), right side (6), unit midfeather (7),
Unit midfeather (8) and unit B bottom plate (10) are connected to form；Unit B micropunch panel (2) and unit B bottom plate (10) connect respectively
Connect rear end face (4) side, right side (6), unit midfeather (7) side and unit diaphragm plate (8) side；After staggeredly, unit B is micro-
Perforated panel (2) and unit B bottom plate (10) be separately connected front end face (3) side, left side (5), unit midfeather (7) side and
Unit diaphragm plate (8) side；
Unit A micropunch panel (1) and unit B micropunch panel (2) flush with outer surface；
Unit A micropores (13) are distributed on unit A micropunch panel (1), the area shared by unit A micropores (13) is that unit A is micro-
Unit B micropore (14) is distributed on unit B micropunch panel (2) in the 0.3%~4% of perforated panel (1) gross area, and unit B is micro-
Area shared by hole (14) is the 0.3%~4% of unit B micropunch panel (2) gross area；Micropore (13) and micropore (14) are worn
Hole area accounting is different；The cavity depth of unit A closed cavities (11) and unit B closed cavity (12) changes in binary cycle.
2. three-dimensional alliteration impedance micropunch period ultrabroad band sound absorption structure according to claim 1, it is characterised in that single
First A closed cavities (11) and the arrangement of unit B closed cavity (12) period-interleaving, are in distributed in three dimensions structure.
3. three-dimensional alliteration impedance micropunch period ultrabroad band sound absorption structure according to claim 1, it is characterised in that envelope
The depth ratio of closed chamber body (10) and closed cavity (11) is 1.5 ~ 4.5, i.e. unit A micropunch panel (1) arrives unit A bottom plates (9)
Distance be 1.5-4.5 times of unit B micropunch panel (2) and unit B bottom plate (10) distance.
4. three-dimensional alliteration impedance micropunch period ultrabroad band sound absorption structure according to claim 1, it is characterised in that micro-
The aperture in hole (8) is 0.2-1.2mm.
5. three-dimensional alliteration impedance micropunch period ultrabroad band sound absorption structure according to claim 1, it is characterised in that micro-
The width and length of punch unit structure A and micropunch cellular construction B are no more than 15cm.
6. three-dimensional alliteration impedance micropunch period ultrabroad band sound absorption structure according to claim 1, it is characterised in that single
First A micropunch panel (1) arrives the distance of unit A bottom plates (9), is no more than 350mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711119895.0A CN108385849A (en) | 2017-11-14 | 2017-11-14 | Three-dimensional alliteration impedance micropunch period ultrabroad band flush sound absorption structure |
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| CN201711119895.0A CN108385849A (en) | 2017-11-14 | 2017-11-14 | Three-dimensional alliteration impedance micropunch period ultrabroad band flush sound absorption structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220148550A1 (en) * | 2019-03-04 | 2022-05-12 | Corning Incorporated | Micro-perforated panel systems, applications, and methods of making micro-perforated panel systems |
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| CN206034672U (en) * | 2016-03-24 | 2017-03-22 | 丁海涛 | Acoustics processing unit plate reaches by its wall structure who constitutes |
| CN106639013A (en) * | 2016-11-28 | 2017-05-10 | 南京大学 | Mixed soundproof wall |
| CN107039028A (en) * | 2017-06-02 | 2017-08-11 | 郭辰曦 | A kind of performance test methods of wideband perforated plate |
| CN207512950U (en) * | 2017-11-14 | 2018-06-19 | 同济大学 | Three-dimensional alliteration impedance micropunch period ultrabroad band flush sound absorption structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220148550A1 (en) * | 2019-03-04 | 2022-05-12 | Corning Incorporated | Micro-perforated panel systems, applications, and methods of making micro-perforated panel systems |
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