CN102737627B - Anti-quadratic residue diffusion low-frequency noise elimination and reduction composite template - Google Patents
Anti-quadratic residue diffusion low-frequency noise elimination and reduction composite template Download PDFInfo
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- CN102737627B CN102737627B CN201210201427.9A CN201210201427A CN102737627B CN 102737627 B CN102737627 B CN 102737627B CN 201210201427 A CN201210201427 A CN 201210201427A CN 102737627 B CN102737627 B CN 102737627B
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- base plate
- bottom board
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- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 230000008030 elimination Effects 0.000 title claims abstract description 13
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 13
- 238000009792 diffusion process Methods 0.000 title abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 238000013016 damping Methods 0.000 claims abstract description 13
- 229920002635 polyurethane Polymers 0.000 claims abstract description 12
- 239000004814 polyurethane Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000004698 Polyethylene Substances 0.000 claims abstract description 7
- 229920003023 plastic Polymers 0.000 claims abstract description 7
- 239000004033 plastic Substances 0.000 claims abstract description 7
- -1 polyethylene Polymers 0.000 claims abstract description 7
- 229920000573 polyethylene Polymers 0.000 claims abstract description 7
- 238000009416 shuttering Methods 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 7
- 239000006260 foam Substances 0.000 abstract description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract 1
- 239000003063 flame retardant Substances 0.000 abstract 1
- 239000004800 polyvinyl chloride Substances 0.000 description 4
- 229920000915 polyvinyl chloride Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- AVVWPBAENSWJCB-GASJEMHNSA-N D-mannofuranose Chemical compound OC[C@@H](O)[C@H]1OC(O)[C@@H](O)[C@H]1O AVVWPBAENSWJCB-GASJEMHNSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 101150100212 Manf gene Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Building Environments (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention relates to a low-frequency noise elimination and reduction composite template with reverse quadratic residue diffusion. The template takes a double-sided aluminum-plastic composite board as a bottom board (1), a metal damping sound-insulating felt (2) is pasted on the surface of the bottom board (1), the metal damping sound-insulating felt (2) is fixedly connected with six reflection phase grids (3) made of PVC materials, flame-retardant polyethylene foam boards (5) are respectively bonded and filled in the six reflection phase grids (3), a polyurethane sponge bottom board (6) is pasted on the surface of the six reflection phase grids (3), and sponge square columns (4) with different lengths are pasted on the surface of the polyurethane sponge bottom board (6). The composite template carries out targeted omnidirectional absorption on uniform sound waves and transmitted sound waves acquired by the phase grids, and can greatly reduce the noise of equipment.
Description
Technical field
The present invention relates to a kind of low frequency noise elimination noise reduction composite shuttering of applying the anti-QR diffusion structure of strong noise equipment noise reduction process.
Background technology
In conventional industrial environment noise control technique, while relating to the improvement of very noisy source, the general sealing noise elimination mode that adopts, is about to set up a larger steel construction sound insulation by filling material shell for noise source, and formation baffle intercepts noise transmission.This administration way material usage is large and cost is higher, has also taken larger space.Processing Middle and low frequency noise, especially 2000Hz with lower frequency electrical equipment noise, effect is undesirable.
QR is Quadratic Residue of Prime Numbers by name entirely, it is a kind of mathematical sequence pattern, be the even diffusion theory of sound wave that roentgen Manf red R.Schroeder proposes, and in 1975, deliver the paper of QR diffuser plate." secondary " in QR diffuser plate refers to quadratic power, remainder refer to natural number divided by prime number (except 1 and itself, the number that cannot eliminate) last remainder afterwards.QR diffuser plate is exactly the RPG fan diffuser of often saying, this is a kind of Reflection Phase Grating (reflected phase will grid) structure of effective diffusion sound wave.Owing to can making sound wave spread more evenly, QR diffuser plate has positive help for the tonequality of sound, is used at present audio engineering.Compare with smooth reflecting surface, diffuser plate can effectively be avoided sound focusing.When sound wave is after smooth metope reflection, all acoustic energy all will reflect in the same direction, and its reflection direction depends on the position of sound source.And when sound wave is after QR diffuser plate surface reflection, acoustic energy will be dispersed reflection to different directions, and there is different phase differential.And when reflecting surface is QR diffuser plate, because sound wave spreads with half circular direction, having or not the reflection paths of several different frequency ranges to converge, QR diffuser plate not only can be used for breaing up acoustic energy, plays the effect that prevents echo and standing wave.
Summary of the invention
In order to solve the problem existing in background technology, the invention provides a kind of low frequency noise elimination noise reduction composite shuttering of anti-QR diffusion structure, the even sound wave that this composite shuttering obtains phase grid and transmitting sound wave carry out the absorption of specific aim omnidirectional, can significantly reduce equipment noise.
The technical solution adopted in the present invention is: utilize QR diffuser plate theory to carry out reverse design, obtain the buildup effect of noise source, and take to strengthen absorption measure, attenuating noise intensity block noise penetrate propagation, this structure can be referred to as to anti-QR diffusion structure.Utilize the anti-QR diffusion low frequency noise elimination noise reduction composite shuttering employing which realizes to take double-sided aluminum plastic composite plate as base plate, backplate surface is pasted metal damping sound-insulating felt, six lattice reflected phase will grids of metal damping sound-insulating felt and PVC material are fixed together, the bonding filling flame-proof polyethylene cystosepiment of difference in six lattice reflected phase will grids, six lattice reflected phase will grid surfaces are pasted polyurethane sponge base plate, and polyurethane sponge backplate surface is pasted sponge square column different in size.
The present invention has following beneficial effect: the present invention is main truss for adopting six lattice reflected phase will grids, the aluminium-plastic panel that base plate adopts PVC material two-side cladded aluminum foil to form is done sound baffle, between base plate and reflected phase will grid framework, paste metal damping sound-insulating felt, and fix by web member.The even sound wave that this composite shuttering obtains phase grid and transmitting sound wave carry out the absorption of specific aim omnidirectional, can significantly reduce equipment noise.
accompanying drawing explanation:
Fig. 1 is local tangent plane design sketch structural representation of the present invention;
Fig. 2 is whole structure figure of the present invention.
1-base plate; 2-metal damping sound-insulating felt; 3-six lattice reflected phase will grids; 4-sponge square column; 5-flame-proof polyethylene cystosepiment; 6-polyurethane sponge base plate.
embodiment:
Below in conjunction with accompanying drawing, the present invention is further described:
As shown in Figure 1, the low frequency noise elimination noise reduction composite shuttering of this anti-QR diffusion structure be take double-sided aluminum plastic composite plate as noise reflected bottom plate 1,1-5mm thickness metal damping sound-insulating felt 2 is pasted on base plate 1 surface, and metal damping sound-insulating felt 2 is fixed together with the six lattice reflected phase will grids 3 that PVC material forms; The interior filling low-density flame-proof polyethylene of six lattice reflected phase will grids 3 cystosepiment 5 is for multidirectional sound-absorbing, polyurethane sponge base plate 6 is pasted on six lattice reflected phase will grid 3 surfaces, and sponge square column 4 different in size is pasted for the absorption of multiple reflection direction noise in polyurethane sponge base plate 6 surfaces.
Anti-QR diffusion low frequency noise elimination noise reduction composite shuttering is directly replaced the upper cover of former noise source rack, be arranged on the top of rack, the noise that rack internal noise source produces is invested noise elimination noise reduction composite shuttering after the scattering of metal wall, during the irregular polyurethane sponge body of high-frequency noises process, cavernous body has hole and the bubble of a large amount of inside and outside UNICOMs, when sound wave incides wherein, can cause air vibration in space; Due to the viscosity resistance of air, the friction of air and hole wall, makes quite a few acoustic energy change into heat energy and be consumed, and noise is played to stronger attenuation.
Residual noise enters Low Density Polyethylene cystosepiment 5 acoustical material districts after by polyurethane sponge body, the sound wave of noise and polyethylene foam material pore membrane are converted into heat energy after bumping and producing vibrations, thereby produce good acoustically effective, especially to medium and low frequency (being less than 2000Hz) noise.
Noise enters metal damping sound-insulating felt 2 after penetrating Low Density Polyethylene foam acoustical material, and metal damping sound-insulating felt 2 is Polyvinylchloride and vast scale iron powder composite material, and full range noise is all had to good behaviour, especially low-frequency noise is had compared with strong filter and absorption.
Noise arrives after aluminium-plastic panel material reflected bottom plate 1, partial noise is converted into kinetic energy and absorbs, remainder is launched in six lattice reflected phase will lattice structures, after the reflection of QR diffusion board structure, acoustic energy is dispersed reflection to different directions, and there is different phase differential, make sound wave and metal damping sound-insulating felt, polyethylene acoustical material, the many firing angles of sound-absorbing assembly that polyurethane sponge body forms fully penetrate and contact, the energy of noise is decayed comprehensively, the noise absorption efficiency of sound-absorbing assembly can surpass many times of conventional baffles, the echo reflecting from QR diffusion low frequency noise elimination noise reduction composite shuttering structure thus can be reduced to people's ear hearing lower limit.The above QR low frequency diffusion noise elimination noise reduction composite shuttering possesses omnidirectional's receptivity to the Middle and low frequency noise of the generations such as strong noise equipment cabinet such as frequency converter, can significantly reduce equipment noise.
Claims (1)
1. an anti-QR spreads low frequency noise elimination noise reduction composite shuttering, this template be take double-sided aluminum plastic composite plate as base plate (1), metal damping sound-insulating felt (2) is pasted on base plate (1) surface, metal damping sound-insulating felt (2) is fixed together with six lattice reflected phase will grids (3) of PVC material, difference bonding filling flame-proof polyethylene cystosepiment (5) in six lattice reflected phase will grids (3), polyurethane sponge base plate (6) is pasted on six lattice reflected phase will grid (3) surfaces, and sponge square column (4) different in size is pasted on polyurethane sponge base plate (6) surface; Noise arrives after double-sided aluminum plastic composite plate, and partial noise is converted into kinetic energy and absorbs, and remainder is launched in six lattice reflected phase will grids (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210201427.9A CN102737627B (en) | 2012-06-15 | 2012-06-15 | Anti-quadratic residue diffusion low-frequency noise elimination and reduction composite template |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210201427.9A CN102737627B (en) | 2012-06-15 | 2012-06-15 | Anti-quadratic residue diffusion low-frequency noise elimination and reduction composite template |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102737627A CN102737627A (en) | 2012-10-17 |
| CN102737627B true CN102737627B (en) | 2014-09-17 |
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| CN201210201427.9A Active CN102737627B (en) | 2012-06-15 | 2012-06-15 | Anti-quadratic residue diffusion low-frequency noise elimination and reduction composite template |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4034430B1 (en) * | 2019-09-25 | 2024-06-05 | Stéhane Demguilhem | Sound absorption device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105427853B (en) * | 2015-10-30 | 2022-09-23 | 东南大学 | Broadband micropunch plate sound absorber and performance prediction method and structure design method thereof |
| CN111081211A (en) * | 2019-12-27 | 2020-04-28 | 福州大学 | Silencer with high-temperature-resistant metal damping sandwich structure and working method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0405581A1 (en) * | 1989-06-30 | 1991-01-02 | Nitto Boseki Co., Ltd. | Sound absorber |
| CN201369165Y (en) * | 2009-02-04 | 2009-12-23 | 纪洪鹏 | Combined sound insulation and absorption and noise reduction plate |
| CN202055258U (en) * | 2011-04-29 | 2011-11-30 | 中国葛洲坝集团股份有限公司 | Accurate sample frame for positioning pre-embedded bolts of contact network stand column foundation |
| EP2458090A2 (en) * | 2010-11-25 | 2012-05-30 | Fracasso S.p.A. | Acoustic panel for noise barriers and noise barrier provided with such a panel |
-
2012
- 2012-06-15 CN CN201210201427.9A patent/CN102737627B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0405581A1 (en) * | 1989-06-30 | 1991-01-02 | Nitto Boseki Co., Ltd. | Sound absorber |
| CN201369165Y (en) * | 2009-02-04 | 2009-12-23 | 纪洪鹏 | Combined sound insulation and absorption and noise reduction plate |
| EP2458090A2 (en) * | 2010-11-25 | 2012-05-30 | Fracasso S.p.A. | Acoustic panel for noise barriers and noise barrier provided with such a panel |
| CN202055258U (en) * | 2011-04-29 | 2011-11-30 | 中国葛洲坝集团股份有限公司 | Accurate sample frame for positioning pre-embedded bolts of contact network stand column foundation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4034430B1 (en) * | 2019-09-25 | 2024-06-05 | Stéhane Demguilhem | Sound absorption device |
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| Publication number | Publication date |
|---|---|
| CN102737627A (en) | 2012-10-17 |
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