CN103971671B - A kind of compound low-frequency resonance sound absorption structure - Google Patents
A kind of compound low-frequency resonance sound absorption structure Download PDFInfo
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- CN103971671B CN103971671B CN201410165642.7A CN201410165642A CN103971671B CN 103971671 B CN103971671 B CN 103971671B CN 201410165642 A CN201410165642 A CN 201410165642A CN 103971671 B CN103971671 B CN 103971671B
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Abstract
The present invention relates to a kind of compound low-frequency resonance sound absorption structure, it is characterised in that it includes a resonance sound-absorbing structure for sheet and a micropunch resonance sound-absorbing structure；Wherein, resonance sound-absorbing structure for sheet is the sealed angular cube surrounded by a panel, a backboard and 4 first side plates, and certain thickness air layer is left between panel and backboard；Micropunch resonance sound-absorbing structure is the sealed angular cube surrounded by a micropunch panel, the panel of resonance sound-absorbing structure for sheet and 4 second side plates, and leaves certain thickness air layer between the micropunch panel of micropunch resonance sound-absorbing structure and the panel of resonance sound-absorbing structure for sheet.The present invention is using micropunch resonance sound-absorbing structure preceding, the posterior combination of resonance sound-absorbing structure for sheet, form bi-level resonant sound absorption structure, 200Hz the and 100Hz noises sent respectively for transformer, therefore it is preferable to the sound absorbing capabilities of transformer station's low-frequency noise, frequency specific aim is stronger, and normal incidence sound absorption coefficient can reach 0.8 or so, there is obvious advantage for relatively porous sound-absorbing material.
Description
Technical field
The present invention relates to a kind of sound absorption structure, and in particular to a kind of compound low frequency for transformer station's low-frequency noise design is total to
Shake sound absorption structure.
Background technology
The noise of outdoor substation is one of noise source common in people's daily life, and its Main Noise Sources is transformation
Device, and transformer noise characteristic is to be concentrated mainly on low frequency, i.e. 100Hz and 200Hz.At present, the main noise reduction of outdoor substation is arranged
Apply to insulate against sound and eliminating the noise, take the very rare of sqouynd absorption lowering noise measure.Sqouynd absorption lowering noise refers to take sound absorption measure that acoustic energy is lost,
Reaching reduces the method for Noisy acoustic power.Sound-absorbing material (structure) species is relatively more, and it is big to be divided into two by its material result status
Class, respectively sound-absorbing porous material and resonance sound-absorbing structure.Conventional sound-absorbing porous material is relatively good to medium-high frequency acoustically effective,
It is poor to the sound absorbing capabilities of low frequency, and easily aging or deformation, it is unsuitable to apply to open air.Although resonance sound-absorbing structure species
Compare it is more, it is good to the sound absorbing capabilities of low-frequency noise, and can use out of doors, but currently without specifically for transformer station's noise
The resonance sound-absorbing structure of characteristic design.Therefore, new sound absorption structure is invented for the low-frequency noise characteristic of transformer station, improves power transformation
Overall acoustic environment of standing has important practical significance.
The content of the invention
In view of the above-mentioned problems, it is an object of the invention to provide a kind of dedicated for absorbing the compound low of transformer station's low-frequency noise
Frequency resonance sound-absorbing structure.
To achieve the above object, the present invention takes following technical scheme：A kind of compound low-frequency resonance sound absorption structure, its feature
It is, it includes a resonance sound-absorbing structure for sheet and a micropunch resonance sound-absorbing structure；Wherein, the resonance sound-absorbing structure for sheet
For the sealed angular cube surrounded by a panel, a backboard and 4 first side plates, and one is left between the panel and backboard
Determine the air layer of thickness；The micropunch resonance sound-absorbing structure is by a micropunch panel, the resonance sound-absorbing structure for sheet
The sealed angular cube that panel and 4 second side plates surround, and the micropunch panel of the micropunch resonance sound-absorbing structure and institute
State and leave certain thickness air layer between the panel of resonance sound-absorbing structure for sheet.
In a preferred embodiment, the panel of the resonance sound-absorbing structure for sheet and backboard use sheet material unit area
Mass range is 0.1kg/m3~10kg/m3Between glued board or metallic plate, between its plate air layer thickness scope be 10mm~
Between 500mm.
In a preferred embodiment, for 100Hz noises, air layer thickness scope is 10mm~100mm between its plate
Between.
In a preferred embodiment, the micropunch panel of the micropunch resonance sound-absorbing structure uses sheet material list
Plane product mass range is 0.1kg/m3~10kg/m3Glued board or metallic plate, aperture is not more than 1mm, and punching rate scope is
0.1%~5%, air layer thickness scope is between 10mm~500mm between its plate.
In a preferred embodiment, for 200Hz noises, air layer thickness scope is 50mm~200mm between its plate
Between.
For the present invention due to taking above technical scheme, it has advantages below：1st, the present invention uses micropunch resonance sound-absorbing
Structure is in preceding, the posterior combination of resonance sound-absorbing structure for sheet, composition bi-level resonant sound absorption structure, respectively for transformer hair
200Hz the and 100Hz noises gone out, thus it is preferable to the sound absorbing capabilities of transformer station's low-frequency noise, and frequency specific aim is stronger, vertically enters
0.8 or so can be reached by penetrating acoustic absorptivity, there is obvious advantage for relatively porous sound-absorbing material.2nd, in order to reach outdoor use
Requirement, the present invention using galvanized steel plain sheet make resonance sound-absorbing structure, galvanized steel plain sheet application field it is relatively more, and very into
A kind of ripe material, it is non-aging, it is unlikely to deform, service life can reach 30 years as long as.3rd, present invention making is simple, cost is low
It is honest and clean, corrosion resistance is strong and service life is long, and easy to installation and removal.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is Fig. 1 A-A to sectional view.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
Fig. 1, Fig. 2 show compound low-frequency resonance sound absorption structure 100 provided by the invention, the compound low-frequency resonance sound absorption knot
Structure 100 includes a resonance sound-absorbing structure for sheet 1 and a micropunch resonance sound-absorbing structure 2.Wherein, resonance sound-absorbing structure for sheet 1 is
The sealed angular cube surrounded by a panel 11, a backboard 12 and four side plates 13, and leave one between panel 11 and backboard 12
Determine the air layer of thickness.Micropunch resonance sound-absorbing structure 2 is the panel by a micropunch panel 21, resonance sound-absorbing structure for sheet 1
11 and four sealed angular cubes for surrounding of side plate 22, and the micropunch panel 21 of micropunch resonance sound-absorbing structure 2 is total to thin plate
Certain thickness air layer is left between the panel 11 of sound absorption structure of shaking 1.
In the use of the present invention, compound low-frequency resonance sound absorption structure 100 is arranged on to bottom, surrounding and the top of transformer
Portion, and micropunch resonance sound-absorbing structure 2 is towards transformer side.When the 200Hz sound wave incidents that transformer is sent are total to micropunch
During sound absorption structure 2 of shaking, a resonance sound-absorbing structure is formed by micropunch panel 21 and its back air space, due to micropunch panel
21 each perforate has corresponding cavity behind, and this microperforated panel structure is many Helmholz resonance devices in parallel,
Therefore it can be regarded as a resonator system of quality and spring composition.When the frequency and micropunch resonance sound-absorbing knot of incident acoustic wave
When the resonant frequency of structure 2 is consistent, the air after micropunch panel 21 produces intense vibration friction, strengthens sink effect, is formed
Absworption peak, the acoustic energy is significantly decayed.When the 100Hz sound wave incidents that transformer is sent are to resonance sound-absorbing structure for sheet 1, by
The elasticity of panel 11 and backboard 12, the elasticity of air layer and one resonance sound-absorbing knot of the form of quality of panel 11 and backboard 12
Structure, panel 11 and backboard 12 are excited lower and vibrated in the high pressure changeable of sound wave, panel 11 and backboard 12 is occured bending and deformation, occur
Panel 11 and backboard 12 internal friction loss are with sound energy consumption.When the resonant frequency of resonance sound-absorbing structure for sheet 1 is in sound wave
When near frequency, then with larger sound absorption.
In a preferred embodiment, the panel 11 of resonance sound-absorbing structure for sheet 1 and backboard 12 use sheet material unit plane
Product mass range is 0.1kg/m3~10kg/m3Between glued board or metallic plate, between its plate air layer thickness scope be 10mm~
Between 500mm.For 100Hz noises, the preferable scope of air layer thickness is between 10mm~100mm between its plate.
In a preferred embodiment, the micropunch panel 22 of micropunch resonance sound-absorbing structure 2 uses sheet material unit plane
Product mass range is 0.1kg/m3~10kg/m3Glued board or metallic plate, aperture is not more than 1mm, and punching rate scope is 0.1%
~5%, air layer thickness scope is between 10mm~500mm between its plate.For 200Hz noises, air layer thickness is excellent between its plate
The scope of choosing is between 50mm~200mm.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each part, connected mode and manufacture craft etc. are all
It can be varied from, every equivalents carried out on the basis of technical solution of the present invention and improvement, should not exclude
Outside protection scope of the present invention.
Claims (5)
1. a kind of compound low-frequency resonance sound absorption structure, it is characterised in that it includes a resonance sound-absorbing structure for sheet and a micropunch
Resonance sound-absorbing structure；Wherein, the resonance sound-absorbing structure for sheet is closed to be surrounded by a panel, a backboard and 4 first side plates
Rectangular cubic, and certain thickness air layer is left between the panel and backboard；The micropunch resonance sound-absorbing structure is
The sealed angular cube surrounded by a micropunch panel, the panel of the resonance sound-absorbing structure for sheet and 4 second side plates, and
Certain thickness is left between the micropunch panel of the micropunch resonance sound-absorbing structure and the panel of the resonance sound-absorbing structure for sheet
The air layer of degree.
A kind of 2. compound low-frequency resonance sound absorption structure as claimed in claim 1, it is characterised in that the thin plate resonance sound-absorbing knot
The panel and backboard of structure use sheet material mass area ratio scope as 0.1kg/m3~10kg/m3Between glued board or metallic plate,
Air layer thickness scope is between 10mm~500mm between its plate.
3. a kind of compound low-frequency resonance sound absorption structure as claimed in claim 2, it is characterised in that for 100Hz noises, its plate
Between air layer thickness scope between 10mm~100mm.
4. a kind of compound low-frequency resonance sound absorption structure as described in any one of Claim 1-3, it is characterised in that described micro- to wear
The micropunch panel of hole resonance sound-absorbing structure uses sheet material mass area ratio scope as 0.1kg/m3~10kg/m3Glue
Plywood or metallic plate, aperture are not more than 1mm, and punching rate scope is 0.1%~5%, and air layer thickness scope is 10mm between its plate
Between~500mm.
5. a kind of compound low-frequency resonance sound absorption structure as claimed in claim 4, it is characterised in that for 200Hz noises, its plate
Between air layer thickness scope between 50mm~200mm.
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| CN201410165642.7A CN103971671B (en) | 2014-04-23 | 2014-04-23 | A kind of compound low-frequency resonance sound absorption structure |
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| CN201410165642.7A CN103971671B (en) | 2014-04-23 | 2014-04-23 | A kind of compound low-frequency resonance sound absorption structure |
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| CN103971671A CN103971671A (en) | 2014-08-06 |
| CN103971671B true CN103971671B (en) | 2017-12-26 |
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| CN105244015A (en) * | 2015-10-22 | 2016-01-13 | 中国船舶重工集团公司第七二四研究所 | Accommodation device with sound absorbing function |
| US20190122649A1 (en) * | 2016-04-25 | 2019-04-25 | Acoustic Metamaterials Group Limited | Broadband acoustic absorption metamaterials |
| CN108385849A (en) * | 2017-11-14 | 2018-08-10 | 同济大学 | Three-dimensional alliteration impedance micropunch period ultrabroad band flush sound absorption structure |
| CN108847211B (en) * | 2018-05-18 | 2020-09-11 | 上海超颖声学科技有限公司 | Acoustic structure and design method thereof |
| CN109605842B (en) * | 2018-10-25 | 2022-10-21 | 中国船舶重工集团公司第七一九研究所 | Marine broadband multilayer composite sound absorption structure |
| CN109741726A (en) * | 2018-12-27 | 2019-05-10 | 西安交通大学 | A kind of super surface apparatus of collaboration coupled double-layer sheet-type acoustics |
| CN113674728A (en) * | 2020-05-14 | 2021-11-19 | 中信戴卡股份有限公司 | Sound absorber unit and vehicle wheel with sound absorber |
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Denomination of invention: A composite low-frequency resonant sound absorption structure Effective date of registration: 20230117 Granted publication date: 20171226 Pledgee: Haidian Beijing science and technology enterprise financing Company limited by guarantee Pledgor: Beijing Greentec Acoustics Engineering Co.,Ltd. Registration number: Y2023110000031 |