CN101515302A - Acoustic design method for road noise barrier - Google Patents
Acoustic design method for road noise barrier Download PDFInfo
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- CN101515302A CN101515302A CNA2008100375280A CN200810037528A CN101515302A CN 101515302 A CN101515302 A CN 101515302A CN A2008100375280 A CNA2008100375280 A CN A2008100375280A CN 200810037528 A CN200810037528 A CN 200810037528A CN 101515302 A CN101515302 A CN 101515302A
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Abstract
The invention discloses an acoustic design method for road noise barrier, which comprises the steps of: 1) importing a vector diagram with a Cad format for characterizing the terrains of noise barrier or grid maps with formats such as jpg, bmp, tif, and the like; 2) calibrating the imported graph to achieve the consistence of graphic proportion and actual proportion; 3) combining the actual situation to draw entities such as roads, terrains, houses, forests, grasslands, and the like based on the importing of the graph, and adopting a batch conversion function to finishing the basic work of acoustic modeling by adopting a batch conversion function if the graph is a Cad graph; 4) setting a noise prediction point at a protected sensitive point, calculating a noise value when no barrier exists, and determining an noise-reducing index of the barrier; 5) simulating the noise barrier, adjusting the height and the length of the barrier, and preliminarily calculating a geometrical dimension of the barrier which meets the requirement; and 6) re-calculating the noise-reducing effect of the barrier by combining the geometrical dimension of the sound barrier and simulating the barriers with different structures and sound absorption coefficients until the combination of the geometrical dimension, the structure and the sound absorption coefficient of the sound barrier which meets the requirement is calculated.
Description
Technical field
The present invention relates to road traffic noise improvement technology, especially a kind of acoustic design method for road noise barrier belongs to field of environmental engineering.
Background technology
The formation that the highway of modern city is intensive and networked had both brought the facility and the prosperity of economy of traffic, the harm that also brings noise pollution to us to the modern humans.Therefore, more and more higher along with the raising day by day of human environmental consciousness for the requirement that reduces the urban road noise pollution, also cause the attention of correlation technique industry gradually for the sound barrier that can reduce the urban road noise.
At present the method for designing about sound barrier has much, particularly along with the promoting the use of of computer technology, finishes about the method for designing of this technical field also more and more depends on computing machine.More famous in the world has: the Soundpan of German Braunstein+Berndt company, Denmark B﹠amp; The Stamin ﹠amp of the Lima of K company and the U.S.; Softwares such as Opinion.Because these software degree are formed, formed computer system by the ten minutes complex modules by special operation interface, quite high requirement is arranged for operating personnel's professional background and professional standards.
200410041442.7 " design method of sound barrier " application number disclosed in the Chinese patent literature is, this method is to utilize computing machine, finishes processes such as the Theoretical Calculation of sound barrier height and length and version and Material Selection, simulation of acoustic field, sound barrier effect prediction, wind load strength check by the input of design parameter.Simultaneously, this method software adopts the guide type interface, and progressively pilot operationp person imports necessary parameter and finishes the each several part design effort.
Because what this method related to is most of process of sound barrier design, less to the elaboration of acoustic design method process, in existing design method of sound barrier, the problem of existence mainly contains:
1) not accurate enough to the use of the Acoustic Modeling under the complex conditions, can not import the groundwork that Cad isovector figure is finished Acoustic Modeling, acoustic model mainly to handle simple landform, handle by then being difficult under the complex conditions.
2) because the inaccurate sound barrier noise reduction result of calculation that causes of Acoustic Modeling is not accurate enough, and existing method all is the theoretical calculation formula with reference to the sound barrier noise reduction, can not accurately simulate actual noise radiation situation.
3) in sound barrier noise reduction and the calculating, consider less to the concrete influence of the factors such as noise barrier structure and material.
Because the problem of above-mentioned existence causes the acoustic design method of sound barrier both perfect inadequately, can not carry out acoustic design targetedly at complex conditions, thereby cause the sound barrier noise reduction in the actual use can not reach perfect condition.
Summary of the invention
Purpose of the present invention: be intended to propose a kind of new design method of sound barrier, solve the inaccurate problem that exists in the design of acoustic current barrier, improve the practical effect of sound barrier.
This road audio frequency barrier acoustic design method, physical dimension, version and the wind that utilizes Computer Processing to obtain the audio frequency barrier carry the related data that intensity and material are chosen, and data are preserved and exported, and its specific design method is:
(1) import the vector graphics that design sound barrier place is located through the Cad format analysis processing, or the grid graph of forms such as jpg, bmp or tif.
(2) select importing figure, select the polar plot of Cad form for use, whether the unit ratio of determining the Cad figure before importing is consistent with reality, adopt default setting when consistent, adopt the self-defined modification ratio that is provided with when inconsistent, can revise each layer properties of Cad by importing setup menu, the object of difference figure layer is distinguished; As adopt grid graph to import, then should after importing, finish graphics proportion adjustment work by calibration function.
(3) be grid graph as what import, then need to draw entities such as landform, road, house, the woods, meadow, finish the Acoustic Modeling groundwork in conjunction with actual conditions.
(4) at shielded sensitive spot place the noise prediction point is set, the noise figure when collecting and calculating no barrier is determined the noise reduction index of sound barrier.
(5) at the position simulated sound barrier of intending implementing sound barrier, regulate sound barrier height or length, primary Calculation meets the sound barrier physical dimension of future position noise reduction index.
(6) according to the sound barrier physical dimension, barrier acoustical absorption coefficient under simulation erect type, straight arc different structure screen type and the different acoustic absorbant state, calculate the barrier noise reduction once more, until the combination that calculates satisfactory sound barrier physical dimension, structure and acoustical absorption coefficient.
With the Cad vector graphics, then can utilize the batch translation function to finish the Acoustic Modeling groundwork.
During noise when calculating no barrier, the computing method that adopted are:
(1) with the road sound source with the center line in two tracks of both sides, limit as two line source, according between future position and the sound source apart from situation, be less differential section with the further differential of line source again, participate in calculating as point sound source with each differential section.
(2) calculate the noise contribution value of the point sound source of each differential section respectively, the factors such as barrier decay that cause according to geometric divergence, Atmospheric Absorption, ground effect and barrier that condition consideration sound is set in the calculating to future position.
(3) all point sound sources that superpose are the noise figure of future position to the noise contribution value of future position.
Utilize said method can solve the inaccurate problem that exists in the above-mentioned acoustic design, can calculate the noise reduction that different structure and material constitute sound barrier simultaneously.
Description of drawings
Fig. 1 is a sound barrier acoustic design process flow diagram;
Fig. 2 is the acoustics schematic diagram calculation.
Fig. 3-1 ~ 3-4 is a sound barrier acoustic design model interface synoptic diagram;
Embodiment
Below provide specific implementation method of the present invention, and further set forth the present invention.
The sound barrier acoustic design method that utilizes the technical program to introduce adopts Visual C++ to write software, and specific implementation method is illustrated as follows:
1) import the topomap that design sound barrier place is located, a kind of is the vector graphics of Cad form, and a kind of is the grid graph of forms such as jpg, bmp, tif, by the importing of these two kinds of figures, can handle actual all base map of topographies that run into substantially.
2) after figure imports, next be that figure is calibrated, so-called calibration is adjusted into graphics proportion and actual ratio consistent exactly, for grid graph, can adopt calibration function to finish calibration,, should determine in Cad before importing whether a long measure is actual 1m for the Cad vector graphics by the input calibration point, then need not calibrate in this way, as not being then to adopt mapping function to finish calibration.
3) after the figure calibration, next being exactly Acoustic Modeling work, mainly is the analog operation of finishing road, house, the woods, meadow, landform etc.If grid graph, then analog operation needs to draw above-mentioned entity on grid graph, Cad polar plot in this way, can adopt translation function in batches to finish the drafting of above-mentioned entity, be path layer as the road layer of cad, and the contourline layer is the level line layer, then can be by conversion in batches, the figure layer of selecting to be changed is a switch condition, respectively road layer and contourline layer is converted to road and the level line that software is discerned, and finishes Acoustic Modeling work.
4) parameters such as the road source strength of input actual measurement, road width, road height respectively, the sound absorption factors such as the input woods, meadow, ground.At shielded sensitive spot place the noise prediction point is set, the noise figure when calculating no barrier, and the noise figure fine setting road source strength and the sound absorption factors such as the woods, meadow or ground by actual measurement are determined the two basically identical with basic.
5) at the position simulated sound barrier of intending implementing sound barrier, regulate sound barrier height or length, primary Calculation satisfies future position and meets sound barrier physical dimension under the barrier noise reduction index, and determining of preliminary dimension is in order to select suitable barrier structure and form on the basis of this size.
6) according to the sound barrier physical dimension, barrier acoustical absorption coefficient under simulation erect type, straight arc different structure screen type and the different acoustic absorbant state, calculate the barrier noise reduction once more, until the combination that calculates satisfactory sound barrier physical dimension, structure and acoustical absorption coefficient.
During noise prediction value when calculating no barrier, the computing method (see figure 2) that is adopted is:
(1) with the center line in outermost two tracks of road as two line source.
(2) according to the condition that is provided with, further be less differential section with the line source differential, each differential section participates in calculating as point sound source.
(3) under the implied terms, the length of each differential section is not more than the product of differential section mid point to future position length and certain constant K, acquiescence K=0.5, certainly, also can be set to 0.2 or 0.1 times according to this K is set, the K value is more little, and then differential Duan Yue is many, calculate also accurately more, but computing time is also longer.
(4) with each differential section as point sound source, calculate the noise contribution value of each point sound source respectively to future position, consider the factors such as barrier decay that the geometric divergence of sound, Atmospheric Absorption, ground effect, object reflection and barrier cause according to the condition that is provided with in the calculating, (the decay part 2 of the outdoor acoustic propagation of acoustics: carry out by the correlation formula general algorithmic method) according to GB/T 17247.2-1998 for computing formula.
(5) all point sound sources that superpose are the noise figure of future position to the noise contribution value of future position.
The acoustic design method that adopts this patent to provide, be applied in the design of Shanghai Outer Ring first phase sound barrier, show that with the theoretical noise reduction comparative analysis of adopting this patent method to calculate the two difference is very little by the actual noise reduction with 11 places sound barrier monitoring along the line, error is within 1dB.
In general, although Shanghai Outer Ring has the road fabric width, the speed of a motor vehicle is fast, flow is big, large car ratio height, characteristics such as noise pollution along the line is serious, but the acoustic design method that adopts this patent to provide is applied to Section of Outer Ring Line sound barrier design example, still reached the noise reduction of expection, sensitive spot acoustic environment along the line also is greatly improved, from increasing the soil utilization, house property appreciates, improve People's livelihood, create aspects such as harmonious society, adopt the Section of Outer Ring Line sound barrier of this acoustic design method design significant, show that also this method can be applicable in the sound barrier acoustic design of any road fully simultaneously.
Claims (3)
1, a kind of road audio frequency barrier acoustic design method, physical dimension, version and the wind that utilizes Computer Processing to obtain the audio frequency barrier carry the related data that intensity and material are chosen, and data are preserved and exported, and its specific design method is:
(1) import the vector graphics that design sound barrier place is located through the Cad format analysis processing, or the grid graph of jpg, bmp or tif form;
(2) select importing figure, select the polar plot of Cad form for use, whether the unit ratio of determining the Cad figure before importing is consistent with reality, adopt default setting when consistent, adopt the self-defined modification ratio that is provided with when inconsistent, can revise each layer properties of Cad by importing setup menu, the object of difference figure layer is distinguished; As adopt grid graph to import, then should after importing, finish graphics proportion adjustment work by calibration function;
(3) be grid graph as what import, then need to draw entities such as landform, road, house, the woods, meadow, finish the Acoustic Modeling groundwork in conjunction with actual conditions;
(4) at shielded sensitive spot place the noise prediction point is set, the noise figure when collecting and calculating no barrier is determined the noise reduction index of sound barrier;
(5) at the position simulated sound barrier of intending implementing sound barrier, regulate sound barrier height or length, primary Calculation meets the sound barrier physical dimension of future position noise reduction index;
(6) according to the sound barrier physical dimension, barrier acoustical absorption coefficient under simulation erect type, straight arc different structure screen type and the different acoustic absorbant state, calculate the barrier noise reduction once more, until the combination that calculates satisfactory sound barrier physical dimension, structure and acoustical absorption coefficient.
2, a kind of road audio frequency barrier acoustic design method as claimed in claim 1 is characterized in that: with the Cad vector graphics time, utilize the batch translation function to finish the Acoustic Modeling groundwork.
3, a kind of road audio frequency barrier acoustic design method as claimed in claim 1 is characterized in that: during noise figure when calculating no barrier, the computing method that adopted are:
(1) with the road sound source with the center line in two tracks of both sides, limit as two line source, according between future position and the sound source apart from situation, be less differential section with the further differential of line source again, participate in calculating as point sound source with each differential section;
(2) calculate the noise contribution value of the point sound source of each differential section respectively, the factors such as barrier decay that cause according to geometric divergence, Atmospheric Absorption, ground effect and barrier that condition consideration sound is set in the calculating to future position;
(3) all point sound sources that superpose are the noise figure of future position to the noise contribution value of future position.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102622518A (en) * | 2012-03-08 | 2012-08-01 | 中山大学 | Outdoor sound prediction method based on construction group density |
| CN102663199A (en) * | 2012-04-20 | 2012-09-12 | 江苏省交通规划设计院股份有限公司 | Sound barrier optimization design method on basis of response surface analysis |
| CN102749136A (en) * | 2012-06-20 | 2012-10-24 | 中山大学 | Method for determining noise equivalent frequency of motor vehicle |
| CN102999678A (en) * | 2012-12-26 | 2013-03-27 | 北京航空航天大学 | Nonlinear multi-target range robust optimization based automobile noise reduction method |
| CN104915546A (en) * | 2015-05-21 | 2015-09-16 | 中山大学 | Irregular plane sound source geometrical divergence calculation method adopting line source equivalence |
| CN107066716A (en) * | 2017-03-31 | 2017-08-18 | 柳州顺联科技有限公司 | A kind of cell de-noising method for optimization analysis |
| CN107961472A (en) * | 2016-10-20 | 2018-04-27 | 西门子瑞士有限公司 | With frequency selectivity noise reduction layer, noise reduction fighting nozzle component and its application |
| CN108763775A (en) * | 2018-05-30 | 2018-11-06 | 东南大学 | A kind of routing method and its system carrying out three-dimensional reorganization and expansion to highway based on limiting factor |
| CN110633499A (en) * | 2019-08-19 | 2019-12-31 | 全球能源互联网研究院有限公司 | Sound barrier parameter determination method and device |
| CN111209644A (en) * | 2018-11-02 | 2020-05-29 | 株洲中车时代电气股份有限公司 | Converter noise prediction method |
| CN118395843A (en) * | 2024-04-15 | 2024-07-26 | 中科海智(青岛)轨道交通研究院有限公司 | Road sound barrier acoustic design simulation calculation method and system |
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2008
- 2008-05-16 CN CNA2008100375280A patent/CN101515302A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102622518A (en) * | 2012-03-08 | 2012-08-01 | 中山大学 | Outdoor sound prediction method based on construction group density |
| CN102622518B (en) * | 2012-03-08 | 2014-11-26 | 中山大学 | Outdoor sound prediction method based on construction group density |
| CN102663199A (en) * | 2012-04-20 | 2012-09-12 | 江苏省交通规划设计院股份有限公司 | Sound barrier optimization design method on basis of response surface analysis |
| CN102663199B (en) * | 2012-04-20 | 2015-05-13 | 江苏省交通规划设计院股份有限公司 | Sound barrier optimization design method on basis of response surface analysis |
| CN102749136A (en) * | 2012-06-20 | 2012-10-24 | 中山大学 | Method for determining noise equivalent frequency of motor vehicle |
| CN102999678A (en) * | 2012-12-26 | 2013-03-27 | 北京航空航天大学 | Nonlinear multi-target range robust optimization based automobile noise reduction method |
| CN104915546B (en) * | 2015-05-21 | 2017-10-20 | 中山大学 | A kind of equivalent irregular area source of sound geometric divergence computational methods of line source |
| CN104915546A (en) * | 2015-05-21 | 2015-09-16 | 中山大学 | Irregular plane sound source geometrical divergence calculation method adopting line source equivalence |
| CN107961472A (en) * | 2016-10-20 | 2018-04-27 | 西门子瑞士有限公司 | With frequency selectivity noise reduction layer, noise reduction fighting nozzle component and its application |
| CN107066716A (en) * | 2017-03-31 | 2017-08-18 | 柳州顺联科技有限公司 | A kind of cell de-noising method for optimization analysis |
| CN108763775A (en) * | 2018-05-30 | 2018-11-06 | 东南大学 | A kind of routing method and its system carrying out three-dimensional reorganization and expansion to highway based on limiting factor |
| CN108763775B (en) * | 2018-05-30 | 2022-03-18 | 东南大学 | Line setting method and system for three-dimensional reconstruction and extension of expressway based on limiting factors |
| CN111209644A (en) * | 2018-11-02 | 2020-05-29 | 株洲中车时代电气股份有限公司 | Converter noise prediction method |
| CN110633499A (en) * | 2019-08-19 | 2019-12-31 | 全球能源互联网研究院有限公司 | Sound barrier parameter determination method and device |
| CN118395843A (en) * | 2024-04-15 | 2024-07-26 | 中科海智(青岛)轨道交通研究院有限公司 | Road sound barrier acoustic design simulation calculation method and system |
| CN118395843B (en) * | 2024-04-15 | 2024-09-27 | 中科海智(青岛)轨道交通研究院有限公司 | Road sound barrier acoustic design simulation calculation method and system |
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Open date: 20090826 |