CN111341292A - Perforated plate laminated sound absorption structure - Google Patents
Perforated plate laminated sound absorption structure Download PDFInfo
- Publication number
- CN111341292A CN111341292A CN201911234488.3A CN201911234488A CN111341292A CN 111341292 A CN111341292 A CN 111341292A CN 201911234488 A CN201911234488 A CN 201911234488A CN 111341292 A CN111341292 A CN 111341292A
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- Prior art keywords
- perforated plate
- perforated
- layer
- sound absorbing
- plate laminated
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 21
- 238000010030 laminating Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 3
- 239000002657 fibrous material Substances 0.000 claims description 2
- 239000006261 foam material Substances 0.000 claims description 2
- 238000003475 lamination Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 15
- 239000002356 single layer Substances 0.000 description 7
- 239000011148 porous material Substances 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
- G10K11/168—Plural layers of different materials, e.g. sandwiches
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Building Environments (AREA)
Abstract
The invention provides a perforated plate laminated sound absorption structure which comprises a perforated plate laminated structure, an air back cavity and a rigid wall surface which are sequentially connected, wherein the perforated plate laminated structure comprises a plurality of layers of perforated plates which are welded or bonded to form an integral structure, the opening direction of each layer of perforated plates is perpendicular to a panel, and holes on the perforated plate laminated structure and the air back cavity form a Helmholtz resonator to absorb noise. The invention can absorb noise in museum, concert hall and other environments, and has simple structure, convenient processing and higher design.
Description
Technical Field
The invention relates to the field of noise reduction structure design, in particular to a perforated plate laminating sound absorption structure.
Background
Perforated panels are a typical resonant sound absorbing structure, and are usually made by drilling small holes in a panel, and are low cost, designable and durable. However, the frequency range in which the sound absorption coefficient of the single-layer perforated plate continuously exceeds 0.5 is small, and the noise reduction effect is poor. The novel perforated plate structure with excellent broadband sound absorption capacity and convenient processing is designed, and has practical engineering application value in the aspect of reducing internal noise of places such as museums, music halls and the like.
Disclosure of Invention
The invention provides a perforated plate laminating sound absorption structure, aiming at solving the problem that the broadband sound absorption capacity of the existing perforated plate is insufficient, the perforated plate laminating sound absorption structure can absorb noise in environments such as museums, music halls and the like, and has the advantages of simple structure, convenience in processing and higher design.
The invention provides a perforated plate laminated sound absorption structure which comprises a perforated plate laminated structure, an air back cavity and a rigid wall surface which are sequentially connected, wherein the perforated plate laminated structure comprises a plurality of layers of perforated plates which are welded or bonded to form an integral structure, the opening direction of each layer of perforated plates is perpendicular to a panel, and holes on the perforated plate laminated structure and the air back cavity form a Helmholtz resonator to absorb noise.
Further, the number of layers in the perforated plate lamination structure varies from 1 to 100, and the thickness of each perforated plate varies from 0.01mm to 5 mm.
Furthermore, the diameter of each layer of perforated plate in the perforated plate laminating structure is 0.1mm-2mm, and the distance between the perforations is 0.5mm-10 mm.
Further, the axes of the perforations of each layer in the perforated plate laminate may not coincide, but communicate between the perforations of the upper and lower layers.
Further, the perforated plate laminate structure may be made of a wooden plate, metal, plastic, porous fiber material, or porous foam material.
Further, the air back cavity may be filled with a porous sound absorbing material, either completely or partially.
Further, when in use, the perforated plate laminated structure is installed towards a noise source, so that noise can enter the structure conveniently.
The invention has the beneficial effects that:
the aperture of each layer of perforation in the perforated plate laminated structure is different, and the perforation shape of the laminated structure is stepped when viewed as a whole. When the air current flows through the perforated plate laminated structure, the disturbance received is increased, the energy dissipation carried by sound waves is accelerated, and the broadband sound absorption capability of the structure is enhanced. Meanwhile, the opening size of each layer of perforated plate in the perforated plate laminated structure, the distance between holes and the thickness of the holes are adjustable, and the design is high.
Drawings
FIG. 1 is a schematic three-dimensional structure of an embodiment of the present invention;
figure 2 is a graph comparing the optimum sound absorption coefficient for a perforated plate laminate versus a single layer perforated plate at equal thickness.
Detailed Description
The invention will be further explained with reference to the drawings.
The perforated panel laminate sound absorbing structure of the present invention, as shown in fig. 1, comprises a perforated panel laminate 1, an air backing cavity 2 and rigid walls 3. The opening direction of each layer of perforated plate of the laminated structure is perpendicular to the panel, and the layers are welded or bonded to form an integral structure. The perforations of the laminate structure and the air back cavity constitute a Helmholtz resonator which absorbs the noise.
The perforated laminated sound absorbing structure may be made of wood board, metal, plastic, porous fiber, or porous foam. The air back cavity can be filled with porous materials, and the design aims to further block the air flow by utilizing the internal pores of the porous materials, increase the viscous dissipation and the heat dissipation of the air and enhance the sound absorption capability of the structure.
The perforated plate laminated sound absorbing structure is designed to allow more noise to enter the structure interior, partially convert the noise energy into heat energy for dissipation, and reduce the noise energy reflected at the panel when the perforated plate laminated sound absorbing structure is installed towards a noise source in use.
In the examples, the perforated plate laminate consisted of five perforated plates, each having a thickness of 0.2mm and a hole-to-hole distance of 4 mm. For comparison, a single layer perforated plate was set to 1mm in thickness with a 4mm hole-to-hole spacing. The air back cavity thickness is 50 mm. The structure is made of austenitic stainless steel and the density is about 7950kg/m3。
In this embodiment, through optimization, when the perforation diameter of the first layer of perforated plate is 1.92mm, the perforation diameter of the second layer of perforated plate is 0.90mm, the perforation diameter of the third layer of perforated plate is 0.32mm, the perforation diameter of the fourth layer of perforated plate is 1.00mm, the perforation diameter of the fifth layer of perforated plate is 1.63mm, and the average sound absorption coefficient of the perforated plate laminated structure in the range of 50Hz to 2000Hz reaches 0.49 at most. In contrast, when the aperture diameter of the single-layer perforated plate is 0.46mm, the average sound absorption coefficient of the single-layer perforated plate in the range of 50Hz to 2000Hz reached 0.38 at the maximum. The perforated plate laminate structure provides a maximum average sound absorption coefficient improvement of about 29% over a single layer perforated plate of equal thickness in the range of 50Hz to 2000Hz without adding too much to the cost of manufacturing the structure. In addition, as shown in fig. 2, in the case where the average sound absorption coefficient is maximized in the range of 50Hz to 2000Hz, the sound absorption coefficient of the single-layer laminate continuously exceeds 0.5 only in the range of 354Hz to 938Hz, and the sound absorption coefficient of the perforated-plate laminate continuously exceeds 0.5 in the range of 362Hz to 1221Hz, the sound absorption capacity in a wide frequency is greatly improved.
While the invention has been described in terms of its preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. A perforated panel laminate sound absorbing structure characterized by: the perforated plate laminated structure comprises a plurality of layers of perforated plates which are welded or bonded to form an integral structure, the opening direction of each layer of the perforated plate is perpendicular to the panel, and the holes in the perforated plate laminated structure (1) and the air back cavity (2) form a Helmholtz resonator to absorb noise.
2. The perforated panel laminate sound absorbing structure of claim 1 wherein: the number of layers of perforated plates in the perforated plate laminating structure (1) is changed within the range of 1-100, and the thickness of each layer of perforated plate is changed between 0.01mm and 5 mm.
3. The perforated panel laminate sound absorbing structure of claim 1 wherein: the perforated plate lamination structure (1) is characterized in that the diameter of each perforated plate layer is 0.1mm-2mm, and the distance between the perforations is 0.5mm-10 mm.
4. The perforated panel laminate sound absorbing structure of claim 1 wherein: the axes of the perforations of each layer in the perforated plate laminated structure (1) are not coincident, and the perforations of the upper layer and the lower layer are communicated.
5. The perforated panel laminate sound absorbing structure of claim 1 wherein: the perforated plate laminated structure (1) is made of a wooden plate, metal, plastic, a porous fiber material or a porous foam material.
6. The perforated panel laminate sound absorbing structure of claim 1 wherein: the air back cavity (2) is completely or partially filled with porous sound absorption materials.
7. The perforated panel laminate sound absorbing structure of claim 1 wherein: the perforated plate laminate structure (1) is mounted towards a noise source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911234488.3A CN111341292A (en) | 2019-12-05 | 2019-12-05 | Perforated plate laminated sound absorption structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911234488.3A CN111341292A (en) | 2019-12-05 | 2019-12-05 | Perforated plate laminated sound absorption structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111341292A true CN111341292A (en) | 2020-06-26 |
Family
ID=71181953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911234488.3A Pending CN111341292A (en) | 2019-12-05 | 2019-12-05 | Perforated plate laminated sound absorption structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111341292A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113362795A (en) * | 2021-05-10 | 2021-09-07 | 西安交通大学 | Porous sound absorbing structure of petal-shaped channel |
Citations (10)
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|---|---|---|---|---|
| WO2003001501A1 (en) * | 2001-06-21 | 2003-01-03 | Kabushiki Kaisha Kobe Seiko Sho | Porous soundproof structural body and method of manufacturing the structural body |
| CN102682759A (en) * | 2012-04-28 | 2012-09-19 | 中国科学院合肥物质科学研究院 | Multilayer sound-absorption wedge having resonance sound absorption structure |
| CN204303341U (en) * | 2014-12-24 | 2015-04-29 | 北京市劳动保护科学研究所 | A kind of porous compound sound-absorption structural |
| CN104575484A (en) * | 2014-12-30 | 2015-04-29 | 北京市劳动保护科学研究所 | Controllable compound sound absorption structure |
| CN104616647A (en) * | 2014-12-26 | 2015-05-13 | 北京市劳动保护科学研究所 | Composite sound absorption structure |
| RU2014134898A (en) * | 2014-08-27 | 2016-03-27 | Олег Савельевич Кочетов | SOUND-ABSORBING DESIGN |
| CN106782475A (en) * | 2015-11-21 | 2017-05-31 | 厦门嘉达声学技术有限公司 | Composite resonant sound absorption structure |
| CN109763577A (en) * | 2019-01-21 | 2019-05-17 | 南京航空航天大学 | A kind of porous plate acoustic adsorption device with rough surface modification micropore |
| CN110111763A (en) * | 2019-05-10 | 2019-08-09 | 华南理工大学 | A kind of pierced acoustic Meta Materials sound absorption structure of multilayer |
| CN110397505A (en) * | 2019-07-11 | 2019-11-01 | 上海交通大学 | A kind of extension cast perforated plate honeycomb interlayer sound absorption structure |
-
2019
- 2019-12-05 CN CN201911234488.3A patent/CN111341292A/en active Pending
Patent Citations (10)
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|---|---|---|---|---|
| WO2003001501A1 (en) * | 2001-06-21 | 2003-01-03 | Kabushiki Kaisha Kobe Seiko Sho | Porous soundproof structural body and method of manufacturing the structural body |
| CN102682759A (en) * | 2012-04-28 | 2012-09-19 | 中国科学院合肥物质科学研究院 | Multilayer sound-absorption wedge having resonance sound absorption structure |
| RU2014134898A (en) * | 2014-08-27 | 2016-03-27 | Олег Савельевич Кочетов | SOUND-ABSORBING DESIGN |
| CN204303341U (en) * | 2014-12-24 | 2015-04-29 | 北京市劳动保护科学研究所 | A kind of porous compound sound-absorption structural |
| CN104616647A (en) * | 2014-12-26 | 2015-05-13 | 北京市劳动保护科学研究所 | Composite sound absorption structure |
| CN104575484A (en) * | 2014-12-30 | 2015-04-29 | 北京市劳动保护科学研究所 | Controllable compound sound absorption structure |
| CN106782475A (en) * | 2015-11-21 | 2017-05-31 | 厦门嘉达声学技术有限公司 | Composite resonant sound absorption structure |
| CN109763577A (en) * | 2019-01-21 | 2019-05-17 | 南京航空航天大学 | A kind of porous plate acoustic adsorption device with rough surface modification micropore |
| CN110111763A (en) * | 2019-05-10 | 2019-08-09 | 华南理工大学 | A kind of pierced acoustic Meta Materials sound absorption structure of multilayer |
| CN110397505A (en) * | 2019-07-11 | 2019-11-01 | 上海交通大学 | A kind of extension cast perforated plate honeycomb interlayer sound absorption structure |
Non-Patent Citations (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113362795A (en) * | 2021-05-10 | 2021-09-07 | 西安交通大学 | Porous sound absorbing structure of petal-shaped channel |
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