CN116756834B - Design and selection method for sound insulation window along rail transit line - Google Patents
Design and selection method for sound insulation window along rail transit line Download PDFInfo
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Abstract
The application discloses a design and selection method for a sound insulation window along a track traffic line, belonging to the technical field of track traffic noise control; comprising the following steps: taking train noise as a sound source, and acquiring sound source frequencies to obtain first sound level values of the sound source frequencies; determining a sound level single-value evaluation quantity standard value of indoor noise; calculating to obtain a second sound level value of each sound source frequency at the central point of the sound insulation window; setting different weight sound insulation amounts, determining corresponding sound insulation amounts of different air sound insulation reference curves under each sound source frequency, and fitting to obtain a sound insulation amount curve of a sound insulation window; and calculating to obtain a fifth sound level value of each indoor sound source frequency, calculating to obtain an indoor sound level single value evaluation quantity, comparing whether the indoor sound level single value evaluation quantity is smaller than a sound level single value evaluation quantity standard value, determining a sound insulation window weighting sound insulation quantity, and selecting a proper sound insulation window. The application has the advantages that: the design sound insulation amount of the sound insulation window is calculated more accurately, and the performance grade of the sound insulation window is selected reasonably.
Description
Technical Field
The application belongs to the technical field of track traffic noise control, and particularly relates to a design and selection method for a sound insulation window along a track traffic line.
Background
In recent years, rail traffic, particularly high-speed railways, has been rapidly developed. Along with the situation of noise pollution along the track traffic line is also increasingly severe, so that the design and selection of the sound insulation performance of the sound insulation window, which is a measure for preventing and treating the indoor noise pollution of a building, are more important for guaranteeing the living standard of residents along the track.
However, the characteristic difference of the sound source of the track traffic, especially the high-speed railway, and other sound sources is obvious, the sound insulation performance of the sound insulation windows with the same sound insulation performance level and different sound insulation structures at different frequencies is quite different, the relative position relation between the house building and the line is complex, the sound insulation performance design standard of the sound insulation windows along the track traffic is not clear, the influence of the factors on the sound insulation volume of the sound insulation window design is reflected by the unreliable design selection algorithm, the sound insulation volume of the sound insulation window cannot be accurately determined, if the sound insulation volume of the sound insulation window is selected and installed according to the grading standard of the common window, the installation and manufacturing cost is increased, the indoor sound environment quality often does not meet the standard requirement, and the life quality of residents along the track traffic is seriously influenced.
Therefore, aiming at the problems in the current track traffic, especially the environmental impact evaluation and noise reduction measure design work along the high-speed railway, the method for selecting the sound insulation window is necessary to be developed. The performance grade of the sound insulation window is reasonably selected, and the sound insulation window has important significance for guaranteeing the life quality of indoor residents of buildings along the track traffic line.
Disclosure of Invention
The application aims to meet the actual demand, and provides a design and selection method for a sound insulation window along a rail transit, which can be used for realizing more accurate calculation of the design sound insulation quantity of the sound insulation window and reasonably selecting the performance grade of the sound insulation window.
In order to achieve the above object, the present application provides a design and selection method for a sound insulation window along a track traffic line, including the following steps:
s1, taking train noise as a sound source, and acquiring sound source frequencies to obtain first sound level values of the sound source frequencies;
s2, determining a sound level single-value evaluation quantity standard value of the indoor noise;
s3, calculating diffraction sound attenuation values of the sound source frequencies at the central point of the sound insulation window, and subtracting the diffraction sound attenuation values from the first sound level value to obtain second sound level values of the sound source frequencies at the central point of the sound insulation window;
s4, setting different weight sound insulation amounts, determining the corresponding sound insulation amounts of different air sound insulation reference curves under the frequencies of all sound sources, and fitting according to the weight sound insulation amounts and the air sound insulation reference curves to obtain sound insulation amount curves of sound insulation windows under the different weight sound insulation amounts and values corresponding to the frequencies of all sound sources on the curves;
s5, subtracting the sound insulation amount of the corresponding frequency in the sound insulation amount curve from the second sound level value under different weight sound insulation amounts to obtain a fifth sound level value of each indoor sound source frequency, calculating to obtain an indoor sound level single value evaluation amount by utilizing the fifth sound level value, comparing whether the indoor sound level single value evaluation amount is smaller than the sound level single value evaluation amount standard value or not, and determining the weight sound insulation amount of the sound insulation window;
s6, selecting a proper sound insulation window according to the sound insulation window weight-calculating sound insulation quantity.
In the above scheme of the design selection method for the sound insulation window along the track traffic line, the step S3 includes: determining building location parameters, sound source parameters and propagation parameters; obtaining a third sound level value of each sound source frequency at the position of the center point of the non-shielding sound insulation window; obtaining a fourth sound level value of each sound source frequency at the position of the central point of the shielded sound insulation window; according to the third sound level value and the fourth sound level value, diffraction sound attenuation values of the frequencies of the sound sources at the center point of the shielded sound insulation window are obtained; and subtracting the diffraction sound attenuation value of the corresponding frequency from the first sound level value of each sound source frequency to obtain a second sound level value.
In the scheme of the design and selection method for the sound insulation window along the track traffic line, the position parameters comprise the horizontal distance between the central point of the sound insulation window and the running line of the high-speed railway trainLinear distance of central point of sound insulation window from any one of track traffic sound sources +.>Height difference between sound insulation window center point and track traffic running route, namely sound source position +.>Horizontal projection width of sound insulation window installation planeL、The included angle between the installation plane of the sound insulation window and the line direction is +.>Included angle between central point of sound insulation window installation position and running line height direction of rail transit train ∈>Geometric length of sound wave along diffraction path at two sides and top of building> 、/>、/>、/> 、/>、/>The distance between the central point of the sound insulation window and the edges of the two sides and the top of the building is +.>、/>、/>Line sound source unit->The angle of the line sound source unit to the central point of the sound insulation window is +.>；
The sound source parameters include a reference sound levelSound source frequency->Acoustic power density->；
The propagation parameter includes air densitySpeed of sound propagation->。
In the above scheme of the design and selection method for the sound insulation window along the track traffic line, the obtaining the fourth sound level value of each sound source frequency at the center point of the sound insulation window with shielding includes: the path from the sound source to the central point of the shielded sound insulation window is divided into four paths, and the first path is silent diffraction; the second path is diffraction at the top of the shelter; the third path and the fourth path are diffraction at two side edges of the shielding object respectively.
In the above scheme of the design and selection method for the sound insulation window along the track traffic line, the third sound level value and the fourth sound level value are obtained by numerical integration to obtain the sound level contribution of each sound source frequency at the central point position of the sound insulation window, and then the third sound level value and the fourth sound level value are obtained by logarithmic calculation.
In the scheme of the design and selection method for the sound insulation window along the track traffic line, the diffraction sound attenuation value of each sound source frequency is obtained by subtracting the corresponding fourth sound level value from the third sound level value of each sound source frequency.
In the scheme of the design selection method for the sound insulation windows along the track traffic line, the sound insulation amount curves of the sound insulation windows under different weight measurement sound insulation amounts and the values corresponding to the frequencies of the sound sources on the curves are obtained through fitting by the following formulas:
，
wherein ,is the curve of sound insulation quantity of each frequency of the sound insulation window, < + >>To count the sound insulation amount +.>For the air sound insulation reference curve->For the weighting factor, j represents the frequency of the j-th sound source, j is a natural number and j is equal to or greater than 1.
In the above scheme of the design selection method for the sound insulation window along the track traffic line, the comparing whether the indoor sound level single value evaluation value is smaller than the sound level single value evaluation value standard value, and determining the sound insulation window weighting sound insulation value comprises: and when the indoor sound level single value evaluation quantity is smaller than the sound level single value evaluation quantity standard value, the maximum value which can be taken by the weight-counting sound insulation quantity is the weight-counting sound insulation quantity of the sound insulation window.
In the scheme of the design and selection method for the sound insulation window along the track traffic line, the indoor sound level single-value evaluation quantity is calculated by the following formula:
，
wherein ,，/>，
t is the standard time length of train passing, which is set to 1 hour, n is the number of trains, T eq Is the equivalent time of train passing, the length of the train isThe speed is v, the horizontal distance from the line is +.>，/>A fifth sound level value for each sound source frequency in the room.
In the above scheme of the design selection method for the sound insulation window along the track traffic line, the step S6 further includes: the parameter of the selected sound insulation window is larger than or equal to the weight sound insulation amount of the sound insulation window.
The application has the positive effects that:
based on the technical scheme, the relative position relation between the building provided with the sound insulation window and the rail transit train is divided into different conditions, the direct sound and sound diffraction contribution quantity expression of the line sound source after being influenced by the shielding of the building is constructed, the insertion loss of the line sound source of the building is calculated by adopting a numerical integral calculation method, the sound level of the installation position of the rail transit sound insulation window is accurately determined, the sound insulation quantity or the weight-calculating sound insulation quantity of the sound insulation window is obtained by comparing the target sound level after noise treatment, and the sound insulation window with the corresponding sound insulation performance level is selected according to the sound insulation quantity or the weight-calculating sound insulation quantity.
The method provides a stronger basis for the design and evaluation of the sound insulation windows along the track traffic line, realizes the fine design of the sound insulation windows along the track traffic line, improves the noise reduction effect of the sound insulation window engineering along the track traffic line, overcomes the defects that the sound insulation structure characteristics of the sound insulation windows cannot be aimed at the characteristics of the sound sources of the track traffic and the influence of different relative positions of the building and the track traffic line on the selection of the sound insulation window performance in the existing sound insulation window design, overcomes the defects that the sound insulation quantity of the sound insulation window cannot be accurately determined in the past, increases the installation and manufacturing cost of the sound insulation window, and the indoor sound environment quality cannot meet the standard requirement, is applied to the sound insulation window engineering design and the environmental noise influence evaluation of various track traffic, particularly high-speed railways, and has the advantages of accurate predicted value, reasonable sound insulation grade selection, more truly reflecting the actual situation on site and strong engineering practicability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a design selection method for a sound insulation window along a rail transit line;
FIG. 2 is a schematic cross-sectional view of a track traffic line sound source and a building with sound insulation windows provided by the application;
FIG. 3 is a schematic view of the relationship between a track traffic line sound source and the center point of a building and an acoustic window without regard to the shielding of the building;
FIG. 4 is a schematic view of the relationship between a track traffic line sound source and the center point of a building and an acoustic window when the building is shielded;
fig. 5 shows the sound level values of each sound source frequency in the room under the actual measurement provided by the present application.
The figure indicates:
the horizontal distance between the central point of the sound insulation window and the running line of the high-speed railway train is +.>The straight line distance between the central point of the sound insulation window and any one of the track traffic sound sources is +.>For the height difference between the center point of the sound insulation window and the track traffic running route, namely the position of the sound source,Linstalling a horizontal projection width of a plane sound insulation window for the sound insulation window, < >>For the included angle between the installation plane of the sound insulation window and the line direction,is the included angle between the central point of the installation position of the sound insulation window and the height direction of the running line of the rail transit train,/->For sound propagation speed, +.>For air density->For reference sound level +.>Sound level or equivalent sound level of certain frequency or equivalent frequency outside the room for radiating noise of line sound source without shielding to central position of sound insulation window>Is the target sound level or the target equivalent sound level after the indoor noise of the building is treated> 、/>、/>Distance from two side edges and top edge of building, respectively-> 、/>、、/>、 />、/>Geometric length of sound wave along diffraction path of two sides and top of building respectively, +.>Insertion loss value for building shelter +.>The sound insulation amount of the sound insulation window along the track traffic is obtained.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
In the description of the application, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the application and simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operate in a particular orientation, and therefore should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the application, unless otherwise indicated, the meaning of "a plurality" is two or more.
Examples
Taking a certain high-speed rail trunk line as an example, the design speed per hour of the train of the high-speed motor train unit iskm/h, n=8 marshalling re-emerging trains with length +.>The train passing column number per hour is 8, and an acoustic window is required to be arranged along a resident building, and the included angle between the building and the line is +.>。
The application provides a design and selection method for a sound insulation window along a track traffic line, which is shown in fig. 1 and comprises the following steps:
s1, taking train noise as a sound source, and acquiring sound source frequencies to obtain first sound level values of the sound source frequencies.
The track traffic noise is mainly a line sound source composed of countless consecutive points as sound sources, and therefore is equivalent to a line sound source for the following calculation.
Determining the frequency of the sound source of the rail transit train, and measuring the first sound level value at each frequency by using a sound level meter as shown in Table 1The subscript train represents the sound level of the rail transit, j is a natural number, j is more than or equal to 1, and represents 18 1/3 octaves in the frequency range of 100-5000 Hz.
TABLE 1 first level values at each source frequency
S2, determining a sound level single-value evaluation quantity standard value of the indoor noise.
According to the general Specification for building Environment (GB 55016-2021), the standard value of the sound level single value evaluation value after the indoor noise treatment of a building, namely the target sound level, is set asThe required sound level in the building room should be less than 40dBA.
S3, calculating diffraction sound attenuation values of the sound source frequencies at the center point of the sound insulation window, and subtracting the second sound level values of the sound source frequencies at the center point of the sound insulation window from the first sound level value.
(1) Building location parameters, sound source parameters, and propagation parameters are determined.
The propagation parameters include: air densitySound propagation speed->。
The sound source parameters include: reference sound levelSound source frequency->Acoustic power density->The equivalent sound level of the radiation noise of the line sound source when the radiation noise of the line sound source is transmitted to the outer side of the sound insulation window without shielding under a certain frequency is +.>。
As shown in fig. 2 and 3, the location parameters include: the width L=2m of the building sound insulation window is respectively distant from the two side edges and the top edge of the building=2m、/>=6m、/>Horizontal distance =3m of sound insulation window center point position from track traffic line +.>=30m, height difference of +.>The included angle between the central point of the sound insulation window and the connecting line of the rail transit line and the horizontal plane is =5m>And->The method comprises the steps of carrying out a first treatment on the surface of the If the track traffic noise is divided into countless line sound sources, the line sound source per unit length is +.>The distance between the sound source and the sound insulation window is +.>The angle of any line sound source unit to the central point of the sound insulation window isAny line sound source unit->The included angle between the connecting line at the position of the central point of the sound insulation window and the shortest path direction of the track traffic line is +.>And->The included angle between the plane of the sound insulation window and the track traffic line direction is +.>And->When the sound insulation window is away from the rail transit line and parallel to the rail transit line +.>。
As shown in FIG. 3, toFor the explanation of the technical content of the application, the direct angle range of any line sound source unit transmitted to the sound insulation window is +.>The range of the shielding angle is。
(2) And obtaining a third sound level value of each sound source frequency at the position of the central point of the non-shielding sound insulation window.
As shown in FIG. 3, the sound wave radiated from any one of the line sound source units propagates to the C point, i.e., the sound pressure at the center position of the sound insulation window isBy->，/>The sound pressure of the sound wave radiated by the line sound source transmitted to the sound insulation window to be predicted is
，
Therefore, the third sound level value at each sound source frequency at point C is:
。
(3) And obtaining a fourth sound level value of each sound source frequency at the position of the central point of the shielded sound insulation window.
As shown in fig. 2 and 4, according to the point sound source diffraction formula based on Meakawa theory, any one line sound source unit of the sound barrier shielding regionSound pressure of radiated sound wave propagating to point C:
，
wherein N is Fresnel number，/>，/>，/>For the acoustic propagation wavelength, +.>Is the frequency of the sound wave or equivalent frequency.
The path from the sound source to the central point of the shielded sound insulation window is divided into four paths, wherein the first path is silent diffraction, and sound waves are transmitted into a room through a wall; the second path is diffraction at the top of the shelter; the third path and the fourth path are diffraction at two side edges of the shielding object respectively.
Specifically, as shown in fig. 4, the line sound source unitWhen propagating along the diffraction path 1 to the position of the sound insulation window, the Fresnel number is +.>, wherein ：
，
。
online sound source unitFresnel number propagating along diffraction path 2 to the position of the sound insulation window, wherein ：
，
。
the path 1 and the path 2 are diffraction at two sides of the shielding object.
As shown in fig. 1, the line sound source unitFresnel number propagating along top diffraction path to sound-proof window position，/>，/>, wherein ：
，
。
when (when)，/>When it is obtained，/>. Then the shadow area line sound source +.>The diffracted sound contribution to point C is the sum of the contributions of the linear sound source unit along the diffracted path 1 and the diffracted sound propagating along the diffracted path 2 and the top to the sound-proof window position:
，
the acoustic contribution of the non-diffraction zone line source to the point C, i.e. the acoustic contribution of the silent diffraction, is:
。
in summary, the total sound contribution of the line sound source to the center point of the sound insulation window under the condition of shielding is as follows:
，
the fourth sound level value at each sound source frequency at point C in the building case is:
。
(4) And obtaining diffraction sound attenuation values of the frequencies of the sound sources at the center point of the shielded sound insulation window according to the third sound level value and the fourth sound level value.
The diffraction attenuation value for each sound source frequency can be expressed as:
。
the diffraction sound attenuation values at each frequency were calculated as shown in table 2.
TABLE 2 attenuation of diffracted sounds at various frequencies
(5) And subtracting the diffraction sound attenuation value of the corresponding frequency from the first sound level value of each sound source frequency to obtain a second sound level value.
The sound wave of each design frequency of the track traffic sound source is transmitted to the second sound level value under the frequency of the installation center position of the sound insulation windowAs shown in table 3.
TABLE 3 second sound level values at each sound source frequency
S4, setting different weight sound insulation amounts, determining the corresponding sound insulation amounts of different air sound insulation reference curves under the frequencies of the sound sources, and fitting according to the weight sound insulation amounts and the air sound insulation reference curves to obtain sound insulation amount curves of sound insulation windows under the different weight sound insulation amounts and values corresponding to the frequencies of the sound sources on the curves.
Air sound insulation reference curveThe method is a set of curves used in the process of calibrating the sound insulation of the component, wherein the construction is a shielding object such as a wall, and the corresponding sound insulation amount of the air sound insulation reference curve under each sound source frequency is shown in table 4. In order to ensure the privacy of the indoor environment and reduce the influence of external sound, sound insulation is required. The sound insulation amount is an index describing sound transmission and insulation performance of the air sound. The sound insulation refers to the ratio of the transmitted sound intensity to the incident sound intensity, also known as the sound transmission loss.
Weight-counting sound insulation quantityThe method is characterized in that the sound insulation amount of a sound insulation sample on a frequency band according to a certain octave is compared with a group of reference curves according to a certain method, and then the sound insulation amount is determined.
Gradually increasing from 0, adding 1 each time, and taking an integer value for calculation; exemplary, as shown in tables 4-6, are corresponding to different +.>Air sound insulation reference curve of value ∈ ->The sound level value of each sound source frequency is equal to the sound insulation value, wherein +.>The values of (2) are 0, 34, 35, respectively.
TABLE 4 Table 4Sound insulation amount corresponding to air sound insulation reference curve when=0
TABLE 5Sound insulation amount corresponding to air sound insulation reference curve when the value is 34
TABLE 6Sound insulation amount corresponding to air sound insulation reference curve when being=35
By a weight calculation method, weight factors are set according to sound insulation performance of the sound insulation window under different frequencies, and a sound insulation quantity curve of the sound insulation window under each frequency can be obtained：
，
wherein ,the weighting factors are assigned according to the sound insulation characteristics displayed by the sound insulation member structure of the sound insulation window; as shown in Table 7->The sum of the frequencies in the frequency range of 100 to 5000Hz is 1, and Table 8 shows +.>Is a value of (2); the value 32 is a constant value in '3.2.1-1' in the GB/T50121-2005 weight sound insulation amount calculation method. As shown in Table 9 +.>The sound insulation curve at 34 is given at each sound source frequency as shown in table 10 +.>And when the sound insulation amount curve is 35, the sound insulation amount curve takes the value of each sound source frequency.
TABLE 7 frequency of sound sourcesValues of (2)
/>
TABLE 8 frequencies of sound sourcesValues of (2)
TABLE 9The sound insulation value of the sound insulation value curve under the frequency of each sound source when the sound insulation value is (34)
Table 10The sound insulation value of the sound insulation value curve under the frequency of each sound source when the sound insulation value is (35)
S5, subtracting the sound insulation amount of the corresponding frequency in the sound insulation amount curve from the second sound level value under different weight sound insulation amounts to obtain a fifth sound level value of each indoor sound source frequency, calculating the indoor sound level single value evaluation amount by using the fifth sound level value, comparing whether the indoor sound level single value evaluation amount is smaller than the sound level single value evaluation amount standard value, and determining the weight sound insulation amount of the sound insulation window.
The fifth sound level value at each frequency in the room is:
，
the indoor sound level single-value evaluation amount can be expressed as:
，
wherein ,，/>，
t is the standard length of time for the train to pass, typically set to 1 hour, i.e. t=3600s, T eq For the equivalent time of train transit, n=8,(8-column group motor train unit), then +.>，/>When (I)>；/>When (I)>。
To satisfy the condition whether the indoor sound level single-value evaluation amount is smaller than the sound level single-value evaluation amount standard value, namelyUnder this condition, then, from the calculation above, it is known that +.>The maximum value that can be obtained is 35dB, so the weight and the sound insulation amount of the sound insulation window are 35dB.
S6, selecting a proper sound insulation window according to the sound insulation window weight-calculating sound insulation quantity.
To sum up, the weight and the sound insulation amount of the sound insulation window should be selectedCan make indoor noise level reach standard.
Indoor installation in building in accordance with the above-mentioned track condition and building position conditionAnd the actual measurement is performed for verification. Measuring at sensitive points along a certain trunk railway line as sound source points at 24 days of 3.2022, and selecting the weight-counting sound insulation amount +.>The specifications of the sound insulation window with the flat inner inverted sound insulation window are as follows: 1500mm x 1500mm, the glass construction of the sound insulation window is: the total thickness of the glass was 34mm, 8mm+20A+6mm, and the measured values of the room sound level were as shown in Table 11 below, using RTA840 system.
TABLE 11 actual measurementSound level value at each sound source frequency
As shown in FIG. 5, the thinner curve is a standard curve, the thicker broken line is an actual measurement value, and the indoor sound level is 38.5dBA < 40dBA at this time, thereby meeting the condition.
Based on the technical scheme, the problems that the installation and manufacturing cost of the sound insulation window is increased and the indoor sound environment quality does not meet the standard requirement due to the fact that the sound insulation amount of the sound insulation window cannot be accurately determined in the past are solved, and the proper sound insulation window can be accurately predicted and selected.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.
Claims (10)
1. The design and selection method for the sound insulation window along the track traffic line is characterized by comprising the following steps of:
s1, taking train noise as a sound source, and acquiring sound source frequencies to obtain first sound level values of the sound source frequencies;
s2, determining a sound level single-value evaluation quantity standard value of the indoor noise;
s3, calculating diffraction sound attenuation values of the sound source frequencies at the central point of the sound insulation window, and subtracting the diffraction sound attenuation values from the first sound level value to obtain second sound level values of the sound source frequencies at the central point of the sound insulation window;
s4, setting different weight sound insulation amounts, determining the corresponding sound insulation amounts of different air sound insulation reference curves under the frequencies of all sound sources, and fitting according to the weight sound insulation amounts and the air sound insulation reference curves to obtain sound insulation amount curves of sound insulation windows under the different weight sound insulation amounts and values corresponding to the frequencies of all sound sources on the curves;
s5, subtracting the sound insulation amount of the corresponding frequency in the sound insulation amount curve from the second sound level value under different weight sound insulation amounts to obtain a fifth sound level value of each indoor sound source frequency, calculating to obtain an indoor sound level single value evaluation amount by utilizing the fifth sound level value, comparing whether the indoor sound level single value evaluation amount is smaller than the sound level single value evaluation amount standard value or not, and determining the weight sound insulation amount of the sound insulation window;
s6, selecting a proper sound insulation window according to the sound insulation window weight-calculating sound insulation quantity.
2. The design selection method for the sound insulation window along the track traffic line according to claim 1, wherein the step S3 comprises:
(1) Determining building location parameters, sound source parameters and propagation parameters;
(2) Obtaining a third sound level value of each sound source frequency at the position of the center point of the non-shielding sound insulation window;
(3) Obtaining a fourth sound level value of each sound source frequency at the position of the central point of the shielded sound insulation window;
(4) According to the third sound level value and the fourth sound level value, diffraction sound attenuation values of the frequencies of the sound sources at the center point of the shielded sound insulation window are obtained;
(5) And subtracting the diffraction sound attenuation value of the corresponding frequency from the first sound level value of each sound source frequency to obtain a second sound level value of each sound source frequency.
3. The design and selection method for the sound insulation window along the rail transit line according to claim 2, wherein the position parameter comprises a horizontal distance from a center point of the sound insulation window to a train running line of the high-speed railwayLinear distance of central point of sound insulation window from any one of track traffic sound sources +.>Height difference between sound insulation window center point and track traffic running route, namely sound source positionHorizontal projection width of sound insulation window installation planeL、The included angle between the installation plane of the sound insulation window and the line direction is +.>Sound insulation windowThe included angle between the central point of the installation position and the height direction of the running line of the rail transit train is +.>Geometric length of sound wave along diffraction path at two sides and top of building> 、/>、/>、/> 、/>、/>The distance between the central point of the sound insulation window and the edges of the two sides and the top of the building is +.>、/>、/>Line sound source unit->The angle of the line sound source unit to the central point of the sound insulation window is +.>；
The sound source parameters include a reference sound levelSound source frequency->Acoustic power density->；
The propagation parameter includes air densitySpeed of sound propagation->。
4. The method for designing and selecting a sound insulation window along a track traffic line according to claim 2, wherein the obtaining a fourth sound level value of each sound source frequency at the center point of the sound insulation window with shielding comprises: the path from the sound source to the central point of the shielded sound insulation window is divided into four paths, and the first path is silent diffraction; the second path is diffraction at the top of the shelter; the third path and the fourth path are diffraction at two side edges of the shielding object respectively.
5. The design and selection method for the sound insulation window along the track traffic line according to claim 2, wherein the third sound level value and the fourth sound level value are obtained by numerical integration to obtain sound level contribution of each sound source frequency at the central point position of the sound insulation window, and then logarithm calculation is performed to obtain the third sound level value and the fourth sound level value.
6. The method according to claim 2, wherein the diffracted sound attenuation value of each sound source frequency is obtained by subtracting the corresponding fourth sound level value from the third sound level value of each sound source frequency.
7. The design and selection method for the sound insulation window along the track traffic line according to claim 1, wherein the fitting is performed by obtaining sound insulation value curves of the sound insulation window under different weight sound insulation values and corresponding values of each sound source frequency on the curves, and performing fitting by the following formula:
，
wherein ,is the curve of sound insulation quantity of each frequency of the sound insulation window, < + >>To count the sound insulation amount +.>For the air sound insulation reference curve->For the weighting factor, j represents the frequency of the j-th sound source, j is a natural number and j is equal to or greater than 1.
8. The method for designing and selecting a sound insulation window along a track traffic line according to claim 1, wherein the comparing whether the indoor sound level single value evaluation quantity is smaller than the sound level single value evaluation quantity standard value or not, and determining the sound insulation window weighting sound insulation quantity comprises: and when the indoor sound level single value evaluation quantity is smaller than the sound level single value evaluation quantity standard value, the maximum value which can be taken by the weight-counting sound insulation quantity is the weight-counting sound insulation quantity of the sound insulation window.
9. The design and use method for the sound insulation window along the rail transit line according to claim 1, wherein the indoor sound level single-value evaluation quantity is calculated by the following formula:
，
wherein ,，/>t is the standard time length of train passing, which is set to 1 hour, n is the number of trains, T eq For the equivalent time of train passing, the length of the train is +.>The speed is v, the horizontal distance from the line is +.>，/>A fifth sound level value for each sound source frequency in the room.
10. The design selection method for the sound insulation window along the track traffic line according to claim 1, wherein the step S6 further comprises: the parameter of the selected sound insulation window is larger than or equal to the weight sound insulation amount of the sound insulation window.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1699934A (en) * | 2005-04-13 | 2005-11-23 | 广州市环境监测中心站 | Method for measuring and evaluating room noise of civil architecture |
| JP2014146158A (en) * | 2013-01-29 | 2014-08-14 | Toyota Home Kk | Sound insulation analysis device and sound insulation analysis program |
| CN106595846A (en) * | 2016-12-13 | 2017-04-26 | 中国铁道科学研究院节能环保劳卫研究所 | High-speed railway elevated station structure vibration and noise reduction effect evaluation method |
| CN210032167U (en) * | 2019-02-20 | 2020-02-07 | 广东电网有限责任公司 | Low-frequency noise insulation board and sound insulation cover |
| WO2022226761A1 (en) * | 2021-04-27 | 2022-11-03 | 深圳市韶音科技有限公司 | Method and system for configuring bone conduction hearing aid device |
-
2023
- 2023-08-07 CN CN202310979822.8A patent/CN116756834B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1699934A (en) * | 2005-04-13 | 2005-11-23 | 广州市环境监测中心站 | Method for measuring and evaluating room noise of civil architecture |
| JP2014146158A (en) * | 2013-01-29 | 2014-08-14 | Toyota Home Kk | Sound insulation analysis device and sound insulation analysis program |
| CN106595846A (en) * | 2016-12-13 | 2017-04-26 | 中国铁道科学研究院节能环保劳卫研究所 | High-speed railway elevated station structure vibration and noise reduction effect evaluation method |
| CN210032167U (en) * | 2019-02-20 | 2020-02-07 | 广东电网有限责任公司 | Low-frequency noise insulation board and sound insulation cover |
| WO2022226761A1 (en) * | 2021-04-27 | 2022-11-03 | 深圳市韶音科技有限公司 | Method and system for configuring bone conduction hearing aid device |
Non-Patent Citations (2)
| Title |
|---|
| Wenjuan Sun et al..Analysis of Influencing Factors on Noise Reduction Effect of High Speed Railway Sound Barrier.《IOP Conference Series:Materials Science and Engineering》.2019,第493卷(第1期),1-8. * |
| 胡月琪 等.北京市地铁列车运行引起的建筑室内结构噪声污染特征与评价.《环境工程技术学报》.2017,76-84. * |
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