CN102543059A - Damping vibration-attenuation and noise-reduction method as well as pored damping sheet - Google Patents
Damping vibration-attenuation and noise-reduction method as well as pored damping sheet Download PDFInfo
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- CN102543059A CN102543059A CN2011103711764A CN201110371176A CN102543059A CN 102543059 A CN102543059 A CN 102543059A CN 2011103711764 A CN2011103711764 A CN 2011103711764A CN 201110371176 A CN201110371176 A CN 201110371176A CN 102543059 A CN102543059 A CN 102543059A
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Abstract
The invention provides a damping vibration-attenuation and noise-reduction method as well as a pored damping sheet. The damping vibration-attenuation and noise-reduction method is characterized in that: the damping sheet which is periodically and uniformly pored is adhered to the outer side of a pipeline or a board, wherein the row distances and the column distances of holes which are opened on the damping sheet are the same. By structurally adhering the periodically pored damping sheet, the vibration and the radiation noise of a structure can be effectively reduced, particularly the vibration-attenuation effect below 800 Hz ranges from 8 to 10 dB. The pored damping sheet disclosed by the invention is simple in structure. Compared with the traditional damping layer, the material and the cost are saved and the structural weight is further lightened.
Description
Technical field
The present invention relates to Control Technique of Vibration and Noise, particularly relate to the vibration damping and noise reducing method and the damping structure of tubulose and platy structure.
Background technology
Damping structure is meant damping material and member is combined into one to consume the structure of vibrational energy.Damping structure has free damping layer structure, interval damping layer structure, restriction damping layer structure, four kinds of basic forms of spacing constraint damping layer usually.Though its structure maybe be different, basic mechanism is identical, and common characteristic is exactly with the minimum big as far as possible damping action of damping material performance, reaches the purpose of vibration damping.
The damping fin that this patent relates to is damping material commonly used, in the process of consulting existing patent, finds to use a lot of of damping fin vibration damping, does not have like the content class but relate to this patent.There is the patent of certain correlativity to analyze as follows with regard to several.
The patent No. is the pipeline damping vibration attenuation structure of CN03266425.7; Mainly form by damping vibration attenuation layer and outer mask coating; Said damping vibration attenuation layer is the amalgam of particulate Si hydrochlorate and damping vibration attenuation glue; This damping vibration attenuation layer is adhered to pipeline outer wall, apply one deck mask coating again at the outside surface of said damping vibration attenuation layer.This pipeline damping vibration attenuation structure is not afraid of high-temperature baking; The heat-insulation and heat-preservation effect is arranged; Can be widely used in pipe vibration and Control of Noise Pollution that various factors produces, and have anticorrosive, waterproof, moisture-proof function, to be suitable for ability strong for environment temperature to external world; Can keep remaining unchanged for a long period of time shape, never degenerate, long service life, simple to operation.
But the patent No. is that the pipeline damping vibration attenuation structure of CN03266425.7 is on pipeline outer wall, to adhere to damping vibration attenuation layer and outer mask coating, complex manufacturing technology; Cost is high, and the damping material waste is gained in weight; It is big to take up room; And actual effect of vibration and noise reduction is not obvious, and is limited for the vibration of special frequency band, particularly intermediate frequency and low-frequency vibration effect.
Patent 93211415.6 discloses a kind of damping paster that can be used for various machine casing vibration and noise reducings; Replacing arrangement by metal forming, non-metallic fibers, damping material etc. is bonded; Designability is strong, can be used for local the stickup, can effectively suppress the big local vibration of peak value.This patent is the same with purposes of the present invention, but this patent does not provide the vibration damping frequency range that this achievement is suitable for, and how unknown performances such as the durability of this structure, adaptability are.And patent of the present invention mainly is that a great problem that is used to solve the vibration field is the vibration damping of medium and low frequency, and the present invention is particularly evident to the effectiveness in vibration suppression below the 800Hz.
Summary of the invention
The purpose of this invention is to provide a kind of vibration damping and noise reducing method and perforate damping fin, this absorption vibration denoise method or damping structure can reduce the medium and low frequency vibration and the noise radiation of pipeline and plate effectively, and simple in structure, cost of manufacture is low.
In order to achieve the above object, vibration damping and noise reducing method of the present invention is characterized in that: on the pipeline outside or plate, paste the damping fin by periodically even perforate, the hole line space of promptly opening on the damping fin is identical, column pitch is identical.
A kind of vibration and noise reducing perforate damping fin is characterized in that: by periodically evenly perforate, the hole line space of promptly opening on the damping fin is identical, column pitch is identical on flat substrates.
Aforesaid vibration and noise reducing perforate damping fin is characterized in that: the aperture is ф 1mm ~ 100mm, and line space is 5mm ~ 500mm, and column pitch is 5mm ~ 500mm.
Vibration and noise reducing perforate damping fin as claimed in claim 3 is characterized in that: the aperture is ф 1mm ~ 50mm, and line space is 5mm ~ 200mm, and column pitch is 5mm ~ 200mm.
Because the periodicity of structure and the continuity of material; Can obtain the periodicity of periodic structure density of material, the periodicity of structure and the periodicity of density of material launched, obtain system of equations according to corresponding boundary condition with Fourier's function; Eigenwert and proper vector through the solving equation group; Obtain the function of elastic wave frequency and periodic structure parameter, because this function also has periodically these characteristics, therefore; The frequency that exists elastic wave to pass through, the frequency that this elastic wave can't be passed through is called the periodic structure band gap.The perforate parameter changes like hole size, hole row, column pitch variation can both adjust its damping behavior; This can obtain the parameter and the effectiveness in vibration suppression of structure through the ANSYS system-computed; Therefore structurally adhering to cycle perforate damping fin can reduce the following effectiveness in vibration suppression of structural vibrations and radiated noise, particularly 800Hz effectively at 8-10dB.
Perforate damping fin of the present invention is simple in structure, adopts damping layer economical with materials and cost than tradition, has also alleviated the weight of structure.
Description of drawings
Fig. 1 is the embodiment of the invention 1 a perforate damping fin structural representation, and circular among the figure is perforate, and remainder is the damping base material.
Fig. 2 is the embodiment of the invention 2 perforate damping fin structural representations, and rectangle is perforate among the figure, and remainder is the damping base material.
Fig. 3 is the embodiment of the invention 1,2 and prior art damping comparison diagram.Wherein: redness--the undamped operating mode, blueness--not perforate operating mode of damping, the circular hole operating mode is opened in green--damping, black--and the rectangular opening operating mode is opened in damping.
Fig. 4, percentage of open area are 3%, rectangular opening and circular hole acceleration transport function comparison diagram.
Fig. 5, percentage of open area are 30%, rectangular opening and circular hole acceleration transport function comparison diagram.
Embodiment
Referring to Fig. 1.The embodiment of the invention 1 has circular port on flat substrates, diameter ф 10mm, line space 28mm, column pitch 6.67mm.Damping fin has four lines, 19 row holes.
Referring to Fig. 2.The embodiment of the invention 2 has rectangular opening on flat substrates, hole size is 8 * 10, line space 28mm, column pitch 6.67mm.Damping fin has four lines, 19 row holes.
The embodiment of the invention 1,2 and undamped operating mode and not perforate operating mode of damping arranged relatively see Fig. 3.
Paste at pipeline and to open circular hole and rectangular configuration, percentage of open area is that percentage of open area is that 3% and 30% implementation result figure sees Fig. 4 and Fig. 5 respectively.
Absorption vibration denoise method of the present invention; Structurally by waiting line-spacing and the rule borehole that waits the row distance to form damping fin; Stick on then on the tubulose and platy structure that needs vibration and noise reducing, perforate damping fin of the present invention does not have outer mask coating; Simple in structure, also adopt damping layer economical with materials and cost than tradition.
Pipeline absorption vibration denoise method of the present invention and periodic damping structure can reduce structural vibration and radiated noise effectively, particularly reduce the medium and low frequency vibration and noise.This method is simple in structure, and cost of manufacture is low, and applying of it has positive meaning to structural vibration reduction noise reduction and saving noise reduction cost.
Claims (4)
1. vibration damping and noise reducing method is characterized in that: on the pipeline outside or plate, paste by the periodically even damping fin of perforate, the hole line space of promptly opening on the damping fin is identical, column pitch is identical.
2. vibration and noise reducing perforate damping fin is characterized in that: by periodically evenly perforate, the hole line space of promptly opening on the damping fin is identical, column pitch is identical on flat substrates.
3. vibration and noise reducing perforate damping fin as claimed in claim 2 is characterized in that: the aperture is ф 1mm ~ 100mm, and line space is 5mm ~ 500mm, and column pitch is 5mm ~ 500mm.
4. vibration and noise reducing perforate damping fin as claimed in claim 3 is characterized in that: the aperture is ф 1mm ~ 50mm, and line space is 5mm ~ 200mm, and column pitch is 5mm ~ 200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011103711764A CN102543059A (en) | 2011-11-21 | 2011-11-21 | Damping vibration-attenuation and noise-reduction method as well as pored damping sheet |
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| CN2011103711764A CN102543059A (en) | 2011-11-21 | 2011-11-21 | Damping vibration-attenuation and noise-reduction method as well as pored damping sheet |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943840A (en) * | 2012-11-05 | 2013-02-27 | 中国船舶重工集团公司第七〇五研究所 | Perforated constrained damping structure used for reducing vibration and insulating sound of ship |
| CN105090670A (en) * | 2015-09-15 | 2015-11-25 | 西安交通大学 | Thin film acoustic metamaterial silencer and designing method thereof |
| CN105179869A (en) * | 2015-10-27 | 2015-12-23 | 刘恩斌 | Natural gas flowing noise reduction device |
| CN105276327A (en) * | 2015-11-09 | 2016-01-27 | 王兴楠 | Pipeline online damping silencer for hydraulic system |
| CN105350403A (en) * | 2015-09-30 | 2016-02-24 | 同济大学 | Track board with periodic structure characteristics and track board damping system |
| CN108980248A (en) * | 2018-07-25 | 2018-12-11 | 华东交通大学 | It is a kind of that the vibration isolation bump leveller that shakes is led based on particle damping and the track plates of phonon crystal |
| CN109263165A (en) * | 2018-10-26 | 2019-01-25 | 西南交通大学 | A kind of middle low frequency suction vibration isolation metamaterial of multiband selected control |
| CN112780864A (en) * | 2019-11-07 | 2021-05-11 | 上海海立电器有限公司 | Vibration reduction bent pipe, compressor and air conditioning system |
| CN113601279A (en) * | 2021-08-16 | 2021-11-05 | 南京航空航天大学 | Workpiece radial ultrasonic vibration auxiliary grinding device and operation process thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943840B (en) * | 2012-11-05 | 2015-03-11 | 中国船舶重工集团公司第七〇五研究所 | Perforated constrained damping structure used for reducing vibration and insulating sound of ship |
| CN102943840A (en) * | 2012-11-05 | 2013-02-27 | 中国船舶重工集团公司第七〇五研究所 | Perforated constrained damping structure used for reducing vibration and insulating sound of ship |
| CN105090670A (en) * | 2015-09-15 | 2015-11-25 | 西安交通大学 | Thin film acoustic metamaterial silencer and designing method thereof |
| CN105350403A (en) * | 2015-09-30 | 2016-02-24 | 同济大学 | Track board with periodic structure characteristics and track board damping system |
| CN105350403B (en) * | 2015-09-30 | 2017-11-10 | 同济大学 | Track plates and track plates vibration insulating system with periodic structure feature |
| CN105179869A (en) * | 2015-10-27 | 2015-12-23 | 刘恩斌 | Natural gas flowing noise reduction device |
| CN105276327A (en) * | 2015-11-09 | 2016-01-27 | 王兴楠 | Pipeline online damping silencer for hydraulic system |
| CN108980248A (en) * | 2018-07-25 | 2018-12-11 | 华东交通大学 | It is a kind of that the vibration isolation bump leveller that shakes is led based on particle damping and the track plates of phonon crystal |
| CN109263165A (en) * | 2018-10-26 | 2019-01-25 | 西南交通大学 | A kind of middle low frequency suction vibration isolation metamaterial of multiband selected control |
| CN109263165B (en) * | 2018-10-26 | 2024-01-30 | 西南交通大学 | Multiband-selected-control medium-low frequency absorption and vibration isolation metamaterial |
| CN112780864A (en) * | 2019-11-07 | 2021-05-11 | 上海海立电器有限公司 | Vibration reduction bent pipe, compressor and air conditioning system |
| CN113601279A (en) * | 2021-08-16 | 2021-11-05 | 南京航空航天大学 | Workpiece radial ultrasonic vibration auxiliary grinding device and operation process thereof |
| CN113601279B (en) * | 2021-08-16 | 2022-10-25 | 南京航空航天大学 | Workpiece radial ultrasonic vibration auxiliary grinding device and operation process thereof |
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Application publication date: 20120704 |