CN109024327B - Semi-closed sound insulation barrier for high-speed rail - Google Patents
Semi-closed sound insulation barrier for high-speed rail Download PDFInfo
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- CN109024327B CN109024327B CN201810915296.8A CN201810915296A CN109024327B CN 109024327 B CN109024327 B CN 109024327B CN 201810915296 A CN201810915296 A CN 201810915296A CN 109024327 B CN109024327 B CN 109024327B
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- sound
- absorbing
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- 230000004888 barrier function Effects 0.000 title claims abstract description 18
- 238000009413 insulation Methods 0.000 title abstract description 8
- 238000010521 absorption reaction Methods 0.000 claims abstract description 41
- 230000030279 gene silencing Effects 0.000 claims abstract description 8
- 230000009467 reduction Effects 0.000 claims description 5
- 238000005187 foaming Methods 0.000 claims description 4
- 238000013016 damping Methods 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 description 5
- 230000002238 attenuated effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Classifications
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- 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
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- 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
- E01F8/0017—Plate-like elements
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a semi-closed sound insulation barrier for a high-speed rail, which comprises a fixing frame, wherein a silencing and sound absorbing device is arranged on the fixing frame, the silencing and sound absorbing device comprises a sound absorbing layer, and the sound absorbing layer comprises a plurality of sound absorbing plates; the sound absorbing board comprises a sound absorbing base board, and a plurality of sound guide platforms are uniformly arranged on the sound absorbing base board. The sound-absorbing base plate is connected with the sound guide platform, the structures of all the sound-absorbing plates are different, and each sound-absorbing plate can only absorb sound waves with different frequencies. By arranging the device, the absorption of sound energy can be realized, the noise can be quickly weakened, and the environmental pollution is reduced; the sound can be isolated near the railway, and the propagation distance of the sound is reduced.
Description
Technical Field
The invention relates to a sound-proof barrier, in particular to a semi-closed sound-proof barrier for a high-speed rail.
Background
In recent years, rapid development of high-speed railway construction brings rapid and comfortable feeling and great convenience for people going out, but noise pollution generated by running of high-speed trains also has great influence on lives of residents on two sides of a railway line. According to the report, the actual noise peak value of 15m away from the rail on one side of the line can reach 90dB when the motor train unit of 300-350 km/h of the Jingjing intercity railway is actually measured by the building environment detection center of Qinghua university in 11 months of 2008. Under the noise with the intensity for a long time, the human health is greatly damaged. In order to control the environmental noise pollution, people think of a plurality of methods, and an effective method at present is to arrange sound barriers for blocking noise at two sides of a railway. The so-called "sound barrier" is the interposition of a protective structure between the train and the adjacent area, which, like a "wall", is able to block and absorb the noise, so that there is a considerable additional attenuation of the propagation of the sound waves, thus reducing the intensity of the noise in the protected area and allowing an effective control of the noise pollution. The acoustic baffle is just a product of an acoustic barrier, and is a plate material capable of isolating, separating and separating noise transmitted in air.
The existing sound insulation board has the problems of low efficiency and poor isolation effect.
Disclosure of Invention
The invention aims to: aiming at the existing problems, the semi-closed sound insulation barrier for the high-speed rail is provided, the problem that the sound of the high-speed rail pollutes the surrounding environment is solved, and the problem of sound absorption is solved.
The technical scheme adopted by the invention is as follows:
a semi-closed sound insulation barrier for a high-speed rail comprises a fixing frame, wherein a silencing and sound absorbing device is arranged on the fixing frame, the silencing and sound absorbing device comprises a sound absorbing layer, and the sound absorbing layer comprises a plurality of sound absorbing plates; the sound absorbing board comprises a sound absorbing base board, and a plurality of sound guide platforms are uniformly arranged on the sound absorbing base board.
Further, the invention discloses a preferable structure of the semi-closed sound insulation barrier for the high-speed rail, wherein the sound absorption base plate is connected with the sound guide platform, the structure of each layer of sound absorption plate is different, and each layer of sound absorption plate absorbs sound waves with different frequencies.
Furthermore, the frequency of sound absorption of the sound absorption board is f, the sound guide platform is cylindrical, the diameter of an inscribed circle of the cross section of the sound guide platform is greater than or equal to V1/f, and V1 is the speed of sound transmission in air; the height h of the sound guide platform is V1V2/(2f (V2-V1)), and V2 is the speed of sound propagation on the sound guide platform.
Further, the sound absorption natural frequencies of the sound absorption plates are arranged from small to large in the direction from the sound source to the diffusion.
Furthermore, the sound absorbing layer comprises a lower fixing clamp and an upper fixing clamp, a plurality of sound absorbing boards are arranged between the lower fixing clamp and the upper fixing clamp, and damping devices are arranged at the joints of the lower fixing clamp and the upper fixing clamp with the sound absorbing boards.
Furthermore, the sound attenuation and absorption device comprises a reflecting plate, wherein a sound attenuation layer is arranged on one side of a sound source on the reflecting plate, and a sound absorption foaming plate is arranged on the other side of the reflecting plate.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. by arranging the device, the absorption of sound energy can be realized, the noise can be quickly weakened, and the environmental pollution is reduced;
2. by providing this device, it is possible to isolate sound in the vicinity of a railway and reduce the propagation distance of sound.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the sound absorbing device;
FIG. 3 is a schematic front view of the sound absorbing panel;
the labels in the figure are: 1 is a fixed frame, 2 is a reflecting plate, 3 is a sound-absorbing foaming plate, 4 is a sound-absorbing layer, 5 is a sound-absorbing layer, and 6 is a sound-absorbing plate;
501 is a lower fixing clip, 502 is an upper fixing clip;
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1-3, a semi-closed sound-insulating barrier for high-speed rails comprises a fixed frame 1, wherein a silencing and sound-absorbing device is arranged on the fixed frame 1, the silencing and sound-absorbing device comprises a sound-absorbing layer 5, and the sound-absorbing layer 5 comprises a plurality of sound-absorbing plates 6; the sound absorbing board 6 comprises a sound absorbing substrate 601, and a plurality of sound guiding platforms 602 are uniformly arranged on the sound absorbing substrate 601. The sound-absorbing plate 6 is used for absorbing sound with high energy and reducing the intensity of noise.
Further, the invention discloses a preferable structure of the semi-closed sound insulation barrier for the high-speed rail, the sound absorption base plate 601 is connected with the sound guide platform 602, the structure of each sound absorption plate 6 is different, and each sound absorption plate 6 can only absorb sound waves with different frequencies. The sound-absorbing plate 6 absorbs for a specific frequency. The sound-absorbing plate 6 is made of synthetic plastics.
Further, the sound absorbing board 6 can absorb sound at a frequency f, the sound guide table 602 is cylindrical, the diameter of an inscribed circle of the cross section of the sound guide table 602 is greater than or equal to V1/f, and V1 is the speed of sound propagation in air; the height h of the sound guide 602 is V1V2/(2f (V2-V1)), and V2 is the speed of sound propagation on the sound guide 602. The inscribed circle of the cross-section of sound guide 602 should be larger than the wavelength of the sound wave, so that the sound wave is prevented from being diffracted and passing around the sound guide 602. Causing the acoustic panel 6 to fail.
Further, the sound absorption natural frequencies of the sound absorption plates 6 are arranged in the direction from the sound source to the diffusion from small to large. Because the low-frequency sound has strong penetrating power, the filtering can be dissipated firstly, and the silencing efficiency is improved.
Further, the sound absorption layer 5 comprises a lower fixing clamp 501 and an upper fixing clamp 502, a plurality of sound absorption plates 6 are arranged between the lower fixing clamp 501 and the upper fixing clamp 502, and damping devices are arranged at the joints of the lower fixing clamp 501, the upper fixing clamp 502 and the sound absorption plates 6.
Further, the noise reduction and sound absorption device comprises a reflecting plate 2, a noise reduction layer 4 is arranged on one side of a sound source on the reflecting plate 2, and a sound absorption foaming plate 3 is arranged on the other side of the reflecting plate 2.
When the device is used specifically, the frequency characteristics of train noise are detected by the sound wave detection device, several frequencies with the highest energy are selected as the natural frequencies of the sound absorption plates 6, the corresponding sound absorption plates 6 are manufactured, and the device is installed on two sides of a railway.
In operation, when sound is transmitted from the sound source to the sound-absorbing board 6, the sound wave first contacts the sound-guiding platform 602, a part of the sound is reflected back, and a part of the sound enters the sound-guiding platform 602 and continues to travel downward, because the height of the sound-guiding platform 602 is V1V2/(2f (V2-V1)). When sound is transmitted to the sound-absorbing substrate 601 along the air, the sound propagating in the sound guide 602 leads by exactly a half wavelength. When two sound waves meet each other on the sound-absorbing substrate 601, the difference between the two sound waves is half a wavelength, and the frequencies are the same, so that the two sound waves interfere and cancel each other out, and the intensity of the sound with the frequency can be greatly reduced.
The sound is then reduced considerably after passing through several sound-absorbing panels 6. The sound is further attenuated in the sound deadening layer 4, and continues to be attenuated in the sound deadening layer 4 after being reflected by the reflection plate 2. The sound passing through the reflection plate 2 is further attenuated by the sound-absorbing foam sheet 3 absorbing the sound.
Therefore, by arranging the device, the absorption of sound energy can be realized, the noise can be quickly weakened, and the environmental pollution is reduced; the sound can be isolated near the railway, and the propagation distance of the sound is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. A semi-enclosed sound insulating barrier for high-speed rail characterized in that: the sound absorption and noise reduction device comprises a fixed frame (1), wherein a sound absorption and noise reduction device is arranged on the fixed frame (1), the sound absorption and noise reduction device comprises a sound absorption layer (5), and the sound absorption layer (5) comprises a plurality of sound absorption plates (6); the sound absorption board (6) comprises a sound absorption base plate (601), and a plurality of sound guide platforms (602) are uniformly arranged on the sound absorption base plate (601); the sound absorption board (6) has the sound absorption frequency f, the sound guide platform (602) is cylindrical, the diameter of an inscribed circle of the cross section of the sound guide platform (602) is greater than or equal to V1/f, and V1 is the speed of sound transmission in the air; the height h of the sound guide platform (602) is V1V2/(2f (V2-V1)), and V2 is the speed of sound propagation on the sound guide platform (602).
2. A semi-enclosed acoustic barrier for high-speed rails as claimed in claim 1 wherein: the sound-absorbing base plate (601) is connected with the sound guide platform (602), the structures of all layers of sound-absorbing plates (6) are different, and all layers of sound-absorbing plates (6) absorb sound waves with different frequencies.
3. A semi-enclosed acoustic barrier for high-speed rails as claimed in claim 2, wherein: the sound absorption natural frequencies of the sound absorption plates (6) are arranged from small to large in the direction from the sound source to the diffusion.
4. A semi-enclosed acoustic barrier for high-speed rails as claimed in claim 3, wherein: the sound absorption layer (5) comprises a lower fixing clamp (501) and an upper fixing clamp (502), a plurality of sound absorption plates (6) are arranged between the lower fixing clamp (501) and the upper fixing clamp (502), and damping devices are arranged at the joints of the lower fixing clamp (501), the upper fixing clamp (502) and the sound absorption plates (6).
5. A semi-enclosed acoustic barrier for high-speed rails as claimed in claim 4, wherein: the sound-absorbing and silencing device comprises a reflecting plate (2), a sound-absorbing layer (4) is arranged on one side of a sound source on the reflecting plate (2), and a sound-absorbing foaming plate (3) is arranged on the other side of the reflecting plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810915296.8A CN109024327B (en) | 2018-08-13 | 2018-08-13 | Semi-closed sound insulation barrier for high-speed rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810915296.8A CN109024327B (en) | 2018-08-13 | 2018-08-13 | Semi-closed sound insulation barrier for high-speed rail |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109024327A CN109024327A (en) | 2018-12-18 |
| CN109024327B true CN109024327B (en) | 2020-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810915296.8A Active CN109024327B (en) | 2018-08-13 | 2018-08-13 | Semi-closed sound insulation barrier for high-speed rail |
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| Country | Link |
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| CN (1) | CN109024327B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH600078A5 (en) * | 1976-04-12 | 1978-06-15 | Uniboard Ag | Traffic noise screening composite wall element |
| JP2007101959A (en) * | 2005-10-05 | 2007-04-19 | Kobe Steel Ltd | Sound insulation panel and wall |
| CN205529956U (en) * | 2016-04-28 | 2016-08-31 | 中国铁道科学研究院 | Broadband sound absorption cell board |
| CN207017175U (en) * | 2017-07-19 | 2018-02-16 | 魏述成 | A kind of light-weight environment-friendly sound barrier |
| CN108221724B (en) * | 2018-02-01 | 2020-12-29 | 温州华睿建设有限公司 | Median of making an uproar falls in municipal administration |
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2018
- 2018-08-13 CN CN201810915296.8A patent/CN109024327B/en active Active
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| Publication number | Publication date |
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| CN109024327A (en) | 2018-12-18 |
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