Noise simulation prediction model-based sound barrier scheme design method

Abstract

The invention relates to the field of noise processing, and discloses a noise simulation and prediction model-based sound barrier scheme design method, which comprises the following steps of: establishing a noise simulation and prediction model in a region based on noise simulation evaluation software, and carrying out day and night equivalent sound level detection in the region through the model to realize model correction; and sound barrier position simulation design is carried out through the corrected model, day-night equivalent sound levels in the area before and after sound barrier construction are compared, and finally, the sound barrier position is adjusted in combination with a comparison effect. According to the method, the noise simulation prediction model, the design principle, the position evaluation, the effect evaluation and other steps are scientifically applied, the sound barrier scheme with the efficient noise reduction effect is designed, and the purpose of improving the noise environment quality is achieved.

Description

Technical Field

[0001] The invention relates to the field of noise treatment, and in particular to a sound barrier scheme design method based on a noise simulation prediction model. Background Art

[0002] Sound barriers are usually designed for a specific sound source and a specific protected location (or area) to reduce the impact of noise. It is widely used in transportation and municipal facilities such as highways, elevated composite roads, urban light rail subways, etc. to control the impact of traffic noise on nearby urban areas. In addition, sound barriers are also used for sound insulation and noise reduction in factories and other noise sources. Because long-term noise harassment can easily cause harm to human health. The use of sound barriers can significantly reduce the impact of noise on the surrounding environment, improve the quality of the sound environment, and protect people's physical and mental health. Sound barriers not only have noise reduction functions, but can also serve as part of the urban landscape to enhance the image of the city. Through reasonable color and shape matching, sound barriers can be integrated with the surrounding environment to form a unique urban landscape, so sound barriers need to be installed.

[0003] The main function of the sound barrier is to isolate the propagation path of noise and reduce the impact of noise on the surrounding environment. It effectively reduces the diffraction and propagation of noise by combining sound absorption and sound insulation, providing a relatively quiet environment for drivers and residents. After using the sound barrier, it will not pollute the environment because it is made of environmentally friendly materials. At the same time, it can also effectively reduce the energy consumption of noise, which is in line with the country's environmental protection policy. Summary of the invention

[0004] The present invention overcomes the deficiencies of the prior art and provides a sound barrier scheme design method based on a noise simulation prediction model.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: The first aspect of the present invention provides a method for designing a sound barrier scheme based on a noise simulation prediction model, comprising the following steps: Based on the actual building conditions in the target area and combined with noise simulation and assessment software, a numerical simulation model for environmental noise is constructed; The environmental noise numerical simulation calculation model is used to detect the equivalent sound level during the day and night in the target area, and the environmental noise numerical simulation calculation model is optimized based on the detection results of the equivalent sound level during the day and night. The sound barrier is designed based on the qualified environmental noise numerical simulation model and the 3D structural diagram of the target area, and the installation status of the sound barrier is adjusted based on the noise sound effect levels during the day and night.

[0006] Furthermore, in a preferred embodiment of the present invention, the actual building conditions in the target area are combined with noise simulation and evaluation software to construct a numerical simulation model for environmental noise, specifically: Determine the area where the sound barrier needs to be constructed and mark it as the target area, wherein the target area includes all buildings and roads; Obtaining GPS map software, wherein the GPS map software contains a 3D structural diagram of the target area, wherein the 3D structural diagram of the target area draws 3D models of all buildings and roads in the target area in a medium scale; In the target area, all buildings and roads are analyzed, and the roads with names in the GPS map software are identified as roads to be analyzed for noise, and buildings with no less than three floors are identified as buildings to be analyzed for noise; Installing acoustic environment monitoring sensors on the road to be analyzed for noise and the building to be analyzed for noise, wherein the acoustic environment monitoring sensors are devices that can monitor the surrounding noise information of the road to be analyzed for noise and the building to be analyzed for noise; A noise information monitoring standard time is preset, and during the noise information monitoring standard time, the acoustic environment monitoring sensor is used to monitor in real time the surrounding noise information of different noise-to-be-analyzed roads and noise-to-be-analyzed buildings in the target area, Canda / A software is introduced. The Canda / A software is a software that can simulate, evaluate and model the noise of the target area. The 3D structure diagram of the target area and the surrounding noise information of different noise-to-be-analyzed roads and noise-to-be-analyzed buildings in the target area are imported into the Canda / A software to construct a numerical simulation calculation model for environmental noise.

[0007] Furthermore, in a preferred embodiment of the present invention, the equivalent sound level detection during the day and night is performed in the target area through the environmental noise numerical simulation calculation model, and the model verification optimization of the environmental noise numerical simulation calculation model is performed based on the equivalent sound level detection results during the day and night, specifically: Preset a single-day noise sound effect level monitoring timestamp, and divide the single-day noise sound effect level monitoring timestamp into a daytime noise sound effect level monitoring timestamp and a nighttime noise sound effect level monitoring timestamp; By using the acoustic environment monitoring sensor, the location where the acoustic environment monitoring sensor is installed is monitored for surrounding noise information during the day and at night in the target area. Based on the surrounding noise information monitored in the target area during the day and at night, the daytime noise sound effect level monitoring timestamp and the nighttime noise sound effect level monitoring timestamp are combined to obtain the daytime noise sound effect monitoring level and the nighttime noise sound effect monitoring level. Import the monitoring timestamps of the daytime noise sound effect level and the monitoring timestamps of the nighttime noise sound effect level into the environmental noise numerical simulation calculation model, and output the predicted daytime noise sound effect level and the predicted nighttime noise sound effect level; Compare the error values ​​of the daytime noise sound effect monitoring level and the nighttime noise sound effect monitoring level with the corresponding daytime noise sound effect prediction level and the nighttime noise sound effect prediction level, and calibrate them as the daytime noise sound effect level error value and the nighttime noise sound effect level error value; Based on the big data network, the standard error range of the daytime noise sound effect level and the standard error range of the nighttime noise sound effect level are determined respectively, and it is judged whether the error value of the daytime noise sound effect level and the error value of the nighttime noise sound effect level are maintained within the standard error range of the daytime noise sound effect level and the standard error range of the nighttime noise sound effect level respectively; If yes, the environmental noise numerical simulation calculation model is calibrated as a qualified environmental noise numerical simulation calculation model; If not, the environmental noise numerical simulation calculation model is optimized by combining the daytime noise sound effect level error value and the nighttime noise sound effect level error value.

[0008] Further, in a preferred embodiment of the present invention, the combination of the daytime noise sound effect level error value and the nighttime noise sound effect level error value is used to perform model verification optimization on the environmental noise numerical simulation calculation model, specifically: Based on the environmental noise numerical simulation calculation model, all model parameter combinations are determined, wherein the model parameter combination is a combination of the attenuation coefficient of the environmental noise numerical simulation calculation model and the noise distribution weight parameter Introducing a grid search algorithm, constructing a parameter space in an environmental noise numerical simulation calculation model based on the grid search algorithm, and dividing a parameter grid in the parameter space; Different model parameter combinations are imported into different parameter grids, and singular value decomposition is performed on different model parameter combinations through an environmental noise numerical simulation calculation model to obtain the model parameter combinations after singular value decomposition; Continue to configure the model parameter combination after singular value decomposition through the environmental noise numerical simulation calculation model, so as to obtain the secondary prediction level of daytime noise sound effect and the secondary prediction level of nighttime noise sound effect; Calculate the error between the secondary prediction level of daytime noise and the secondary prediction level of nighttime noise and the monitoring level of daytime noise and the monitoring level of nighttime noise, and select the secondary prediction level of daytime noise and the secondary prediction level of nighttime noise corresponding to the minimum error value, and then reversely deduce to obtain the optimal model parameter combination, which is calibrated as the target model parameter combination; The target model parameter combination is applied in the environmental noise numerical simulation calculation model to obtain a qualified environmental noise numerical simulation calculation model.

[0009] Furthermore, in a preferred embodiment of the present invention, the sound barrier is designed in combination with the qualified environmental noise numerical simulation calculation model and the 3D structural diagram of the target area, and the installation state of the sound barrier is adjusted in combination with the noise sound effect level during the day and night, specifically: Analyze the 3D structural diagram of the target area, determine the residential building among all the buildings to be analyzed for noise, and highlight the residential building in the 3D structural diagram of the target area; Retrieve the traffic volume of the noise-to-be-analyzed road based on the big data network, the traffic volume includes vehicle traffic volume and pedestrian traffic volume, analyze the traffic volume of the noise-to-be-analyzed road, determine the noise-to-be-analyzed road whose traffic volume is greater than a preset value, mark it as a road with high traffic volume, and highlight the road with high traffic volume in the 3D structure diagram of the target area; Based on the 3D structural diagram of the target area with residential buildings and high-traffic roads highlighted, the qualified environmental noise numerical simulation calculation model is updated to obtain a type of environmental noise numerical simulation calculation model; In the above-mentioned environmental noise numerical simulation calculation model, the propagation path of noise in residential buildings and roads with high traffic volume is simulated in real time, and the noise sound effect level at different positions in the propagation path is simulated at the same time, and the simulation process is divided into daytime simulation and nighttime simulation; In the numerical simulation calculation model of the first type of environmental noise, the locations where sound barriers can be installed are determined on residential buildings and roads with high traffic volume, marked as locations where sound barriers can be installed, and sound barriers are installed at the locations where sound barriers can be installed; After the sound barrier is installed, the noise sound effect levels at different locations in the propagation path are analyzed, and the installation status of the sound barrier is adjusted based on the analysis results.

[0010] Furthermore, in a preferred embodiment of the present invention, after the sound barrier is installed, the noise sound effect levels at different positions in the propagation path are analyzed, and the installation state of the sound barrier is adjusted based on the analysis results, specifically: After the sound barrier is installed, all installable states of the sound barrier are determined, wherein all installable states of the sound barrier record the installation height, installation length and installation thickness of the sound barrier, and different installation states of the sound barrier correspond to different combinations of installation height, installation length and installation thickness; Determine the factory installation state of the sound barrier, and control the installation state of all the installable positions of the sound barrier to be equal to the factory installation state. When the sound barrier is in the factory installation state, continue to simulate the noise sound effect level at different positions in the propagation path; Obtain the noise incident position and noise receiving position of the sound barrier, and determine the noise sound effect levels of the noise incident position and noise receiving position of the sound barrier after the installation of the sound barrier based on the noise sound effect levels at different positions in the propagation path, so as to calculate the noise sound effect level difference after noise reduction; The standard range of noise sound effect level difference after noise reduction is preset. If there is a sound barrier so that the noise sound effect level difference after noise reduction is maintained within the standard range of noise sound effect level difference under both daytime simulation and nighttime simulation, the corresponding sound barrier will be calibrated as a sound barrier with qualified installation status; If the sound barrier cannot maintain the noise sound effect level difference after noise reduction within the noise sound effect level difference standard range under both daytime simulation and nighttime simulation, the sound barrier shall be adjusted to an installable state, and during the installable state adjustment process, the noise sound effect level difference after noise reduction shall be analyzed in real time, and the installable state output that can maintain the noise sound effect level difference after noise reduction within the noise sound effect level difference standard range under both daytime simulation and nighttime simulation shall be selected to obtain a sound barrier with a qualified installation state.

[0011] The second aspect of the present invention further provides a sound barrier scheme design system based on a noise simulation prediction model, the sound barrier scheme design system comprising a memory and a processor, the memory storing a sound barrier scheme design method, and when the sound barrier scheme design method is executed by the processor, the following steps are implemented: Based on the actual building conditions in the target area and combined with noise simulation and assessment software, a numerical simulation model for environmental noise is constructed; The environmental noise numerical simulation calculation model is used to detect the equivalent sound level during the day and night in the target area, and the environmental noise numerical simulation calculation model is optimized based on the detection results of the equivalent sound level during the day and night. The sound barrier is designed based on the qualified environmental noise numerical simulation model and the 3D structural diagram of the target area, and the installation status of the sound barrier is adjusted based on the noise sound effect levels during the day and night.

[0012] The present invention solves the technical defects existing in the background technology, and the present invention has the following beneficial effects: based on the noise simulation evaluation software, a noise simulation prediction model is established in the area, and the equivalent sound level detection during the day and night in the area is carried out through the model to realize model correction; the sound barrier position is simulated and designed through the corrected model, and the equivalent sound level during the day and night in the area before and after the construction of the sound barrier is compared, and finally the position of the sound barrier is adjusted based on the comparison effect. The present invention scientifically applies the steps of noise simulation prediction model, design principles, position evaluation and effect evaluation, and designs a sound barrier scheme with efficient noise reduction effect, so as to achieve the purpose of improving the quality of the noise environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A flow chart of a noise barrier scheme design method based on a noise simulation prediction model is shown; Figure 2 A flow chart showing a method for designing an installation scheme for a sound barrier is shown; Figure 3 The program view of the sound barrier scheme design system based on the noise simulation prediction model is shown. DETAILED DESCRIPTION

[0015] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0016] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0017] Figure 1 A flow chart of a noise barrier scheme design method based on a noise simulation prediction model is shown, comprising the following steps: S102: Based on the actual building conditions in the target area and combined with noise simulation and assessment software, a numerical simulation model for environmental noise is constructed; S104: performing day and night equivalent sound level detection in the target area through the environmental noise numerical simulation calculation model, and performing model verification and optimization on the environmental noise numerical simulation calculation model based on the day and night equivalent sound level detection results; S106: Design a sound barrier based on the qualified environmental noise numerical simulation model and the 3D structural diagram of the target area, and adjust the installation status of the sound barrier based on the noise sound effect level during the day and night.

[0018] Furthermore, in a preferred embodiment of the present invention, the actual building conditions in the target area are combined with noise simulation and evaluation software to construct a numerical simulation model for environmental noise, specifically: Determine the area where the sound barrier needs to be constructed and mark it as the target area, wherein the target area includes all buildings and roads; Obtaining GPS map software, wherein the GPS map software contains a 3D structural diagram of the target area, wherein the 3D structural diagram of the target area draws 3D models of all buildings and roads in the target area in a medium scale; In the target area, all buildings and roads are analyzed, and the roads with names in the GPS map software are identified as roads to be analyzed for noise, and buildings with no less than three floors are identified as buildings to be analyzed for noise; Installing acoustic environment monitoring sensors on the road to be analyzed for noise and the building to be analyzed for noise, wherein the acoustic environment monitoring sensors are devices that can monitor the surrounding noise information of the road to be analyzed for noise and the building to be analyzed for noise; A noise information monitoring standard time is preset, and during the noise information monitoring standard time, the acoustic environment monitoring sensor is used to monitor in real time the surrounding noise information of different noise-to-be-analyzed roads and noise-to-be-analyzed buildings in the target area, Canda / A software is introduced. The Canda / A software is a software that can simulate, evaluate and model the noise of the target area. The 3D structure diagram of the target area and the surrounding noise information of different noise-to-be-analyzed roads and noise-to-be-analyzed buildings in the target area are imported into the Canda / A software to construct a numerical simulation calculation model for environmental noise.

[0019] It should be noted that since it is necessary to build a sound barrier, it is necessary to first determine the construction area of ​​the sound barrier, that is, the area where noise management is required, that is, the target area. There are roads and buildings in the target area. Since the amount of calculation required for direct measurement in reality is large, the measurement is carried out by simulation. Constructing a 3D structural diagram of the target area can simplify the amount of calculation and improve the calculation efficiency. There are roads with names in the GPS map software, and the flow of people around them will also be large. They are roads where sound barriers need to be installed. Many of the floors with no less than three floors are office buildings or residential areas, which are also buildings that need to install sound barriers. After determining the roads and buildings to be analyzed for noise, install acoustic environment monitoring sensors to detect surrounding noise information in real time, which is a prerequisite for building an environmental noise numerical simulation calculation model. At present, the more common software for predicting and analyzing noise in China mainly includes SoundPLAN, Canda / A, Lima and other software. After a comprehensive comparison of the functions, influencing factors, amount of calculation, calculation time and economy of these software, Canda / A was selected as the prediction software for environmental noise impact assessment of this project. The software integrates environmental management, traffic management and geographic information system (GIS), and can directly reflect the output results on the GIS layer, which can fully meet the requirements of this acoustic environment impact analysis. Through Canda / A, a numerical simulation model for environmental noise is constructed.

[0020] Furthermore, in a preferred embodiment of the present invention, the equivalent sound level detection during the day and night is performed in the target area through the environmental noise numerical simulation calculation model, and the model verification optimization of the environmental noise numerical simulation calculation model is performed based on the equivalent sound level detection results during the day and night, specifically: Preset a single-day noise sound effect level monitoring timestamp, and divide the single-day noise sound effect level monitoring timestamp into a daytime noise sound effect level monitoring timestamp and a nighttime noise sound effect level monitoring timestamp; By using the acoustic environment monitoring sensor, the location where the acoustic environment monitoring sensor is installed is monitored for surrounding noise information during the day and at night in the target area. Based on the surrounding noise information monitored in the target area during the day and at night, the daytime noise sound effect level monitoring timestamp and the nighttime noise sound effect level monitoring timestamp are combined to obtain the daytime noise sound effect monitoring level and the nighttime noise sound effect monitoring level. Import the monitoring timestamps of the daytime noise sound effect level and the monitoring timestamps of the nighttime noise sound effect level into the environmental noise numerical simulation calculation model, and output the predicted daytime noise sound effect level and the predicted nighttime noise sound effect level; Compare the error values ​​of the daytime noise sound effect monitoring level and the nighttime noise sound effect monitoring level with the corresponding daytime noise sound effect prediction level and the nighttime noise sound effect prediction level, and calibrate them as the daytime noise sound effect level error value and the nighttime noise sound effect level error value; Based on the big data network, the standard error range of the daytime noise sound effect level and the standard error range of the nighttime noise sound effect level are determined respectively, and it is judged whether the error value of the daytime noise sound effect level and the error value of the nighttime noise sound effect level are maintained within the standard error range of the daytime noise sound effect level and the standard error range of the nighttime noise sound effect level respectively; If yes, the environmental noise numerical simulation calculation model is calibrated as a qualified environmental noise numerical simulation calculation model; If not, the environmental noise numerical simulation calculation model is optimized by combining the daytime noise sound effect level error value and the nighttime noise sound effect level error value.

[0021] It should be noted that it is necessary to measure the noise sound effect level during the day and at night within a single day for easy analysis, because the noise during the day and at night is different, and the noise effective level should be lower at night. A single-day noise sound effect level monitoring timestamp is preset, and there are multiple time points in the timestamp, which can be divided into daytime timestamps and nighttime timestamps according to different time points. Initially, the surrounding noise information monitored in the target area is measured on the spot to obtain the daytime noise sound effect monitoring level and the nighttime noise sound effect monitoring level, and the daytime noise sound effect monitoring level and the nighttime noise sound effect monitoring level are compared and analyzed with the parameters predicted by the model to obtain the error value. If the error value is within the controllable range, it proves that the model tuning is standard and is not much different from the noise sound effect monitoring level obtained by normal measurement. On the contrary, if the error value is greater than the preset value, it is necessary to perform model verification optimization on the environmental noise numerical simulation calculation model to ensure that the data obtained by the environmental noise numerical simulation calculation model is accurate.

[0022] Further, in a preferred embodiment of the present invention, the combination of the daytime noise sound effect level error value and the nighttime noise sound effect level error value is used to perform model verification optimization on the environmental noise numerical simulation calculation model, specifically: Based on the environmental noise numerical simulation calculation model, all model parameter combinations are determined, wherein the model parameter combination is a combination of the attenuation coefficient of the environmental noise numerical simulation calculation model and the noise distribution weight parameter Introducing a grid search algorithm, constructing a parameter space in an environmental noise numerical simulation calculation model based on the grid search algorithm, and dividing a parameter grid in the parameter space; Different model parameter combinations are imported into different parameter grids, and singular value decomposition is performed on different model parameter combinations through an environmental noise numerical simulation calculation model to obtain the model parameter combinations after singular value decomposition; Continue to configure the model parameter combination after singular value decomposition through the environmental noise numerical simulation calculation model, so as to obtain the secondary prediction level of daytime noise sound effect and the secondary prediction level of nighttime noise sound effect; Calculate the error between the secondary prediction level of daytime noise and the secondary prediction level of nighttime noise and the monitoring level of daytime noise and the monitoring level of nighttime noise, and select the secondary prediction level of daytime noise and the secondary prediction level of nighttime noise corresponding to the minimum error value, and then reversely deduce to obtain the optimal model parameter combination, which is calibrated as the target model parameter combination; The target model parameter combination is applied in the environmental noise numerical simulation calculation model to obtain a qualified environmental noise numerical simulation calculation model.

[0023] It should be noted that the calibration and optimization of the model requires the adjustment of the built-in parameters of the model, that is, the adjustment of the attenuation coefficient and the noise distribution weight parameter of the model, where different combinations of the attenuation coefficient and the noise distribution weight parameter of the model have different changes in the prediction effect of the model. The grid search method can be used to iteratively analyze different combinations of model parameters to select the optimal parameter combination, and the singular value decomposition of different model parameter combinations can reduce the complexity and calculation process of the calculation and improve the calculation efficiency. Finally, the corresponding model parameter combination with the most accurate prediction result can be obtained according to the error value, which is calibrated as the target model parameter combination. By applying the target model parameter combination in the model, a qualified environmental noise numerical simulation calculation model can be obtained.

[0024] Figure 2 A flow chart of a method for designing an installation scheme for a sound barrier is shown, comprising the following steps: S202: Design the sound barrier based on the qualified environmental noise numerical simulation model and the 3D structural diagram of the target area, and adjust the installation status of the sound barrier based on the noise sound effect level during the day and night; S204: After the sound barrier is installed, the noise sound effect levels at different locations in the propagation path are analyzed, and the installation status of the sound barrier is adjusted based on the analysis results.

[0025] Furthermore, in a preferred embodiment of the present invention, the sound barrier is designed in combination with the qualified environmental noise numerical simulation calculation model and the 3D structural diagram of the target area, and the installation state of the sound barrier is adjusted in combination with the noise sound effect level during the day and night, specifically: Analyze the 3D structural diagram of the target area, determine the residential building among all the buildings to be analyzed for noise, and highlight the residential building in the 3D structural diagram of the target area; Retrieve the traffic volume of the noise-to-be-analyzed road based on the big data network, the traffic volume includes vehicle traffic volume and pedestrian traffic volume, analyze the traffic volume of the noise-to-be-analyzed road, determine the noise-to-be-analyzed road whose traffic volume is greater than a preset value, mark it as a road with high traffic volume, and highlight the road with high traffic volume in the 3D structure diagram of the target area; Based on the 3D structural diagram of the target area with residential buildings and high-traffic roads highlighted, the qualified environmental noise numerical simulation calculation model is updated to obtain a type of environmental noise numerical simulation calculation model; In the above-mentioned environmental noise numerical simulation calculation model, the propagation path of noise in residential buildings and roads with high traffic volume is simulated in real time, and the noise sound effect level at different positions in the propagation path is simulated at the same time, and the simulation process is divided into daytime simulation and nighttime simulation; In the aforementioned type of environmental noise numerical simulation calculation model, locations where sound barriers can be installed on residential buildings and roads with high traffic volume are determined, marked as locations where sound barriers can be installed, and sound barriers are installed at the locations where sound barriers can be installed.

[0026] It should be noted that since there are various buildings among the noise buildings to be analyzed, and residential buildings where people live have a greater impact on noise, residential buildings are highlighted. Similarly, the roads to be analyzed with noise whose pedestrian flow is greater than the preset value are marked as high-flow roads. In residential buildings and roads with high traffic, Shangjun needs to install sound barriers to achieve noise reduction. Before installing the sound barrier, it is necessary to simulate the propagation path of the noise through a type of environmental noise numerical simulation calculation model, so as to install the sound barrier to achieve the maximum noise reduction effect. In the simulation process, it is necessary to simulate the noise sound effect level at the same time, and simulate it separately during the day and night. The installation position of the sound barrier is determined by combining the on-site survey and the actual situation. Different residential buildings and roads with high traffic have locations where sound barriers can be installed, that is, the installation position of the sound barrier, but there are differences in the length, height, thickness, etc. of the installation.

[0027] It should be noted that the principle of acoustic noise reduction of sound barriers is that when the sound waves emitted by the noise source encounter the sound barrier, they will propagate along three paths: one part diffracts across the top of the sound barrier to reach the sound receiving point, one part penetrates the sound barrier to reach the sound receiving point, and one part is reflected on the wall of the sound barrier. The insertion loss of the sound barrier mainly depends on the sound energy distribution of the sound waves emitted by the sound source along these three paths. Diffraction means that the sound energy diffracted across the top of the sound barrier to reach the sound receiving point is smaller than the direct sound energy when there is no barrier. The difference in sound level between direct sound and diffracted sound is called diffraction sound attenuation. The phenomenon that the sound waves emitted by the sound source propagate through the sound barrier to the sound receiving point is called transmission. The sound energy penetrating the sound barrier depends on the surface density of the sound barrier, the angle of incidence and the frequency of the sound wave. The sound insulation ability of the sound barrier is evaluated by the sound transmission loss TL. The larger the TL, the smaller the transmitted sound energy; the smaller the TL, the larger the transmitted sound energy. When the sound barrier sound transmission loss and diffraction sound attenuation are greater than 10dB, the transmitted sound energy can be ignored. When sound barriers are built on both sides of the road and the sound barriers are parallel, the sound waves will be reflected multiple times between the sound barriers and diffract over the top of the sound barriers to the sound receiving point, which will reduce the insertion loss of the sound barriers.

[0028] Furthermore, in a preferred embodiment of the present invention, after the sound barrier is installed, the noise sound effect levels at different positions in the propagation path are analyzed, and the installation state of the sound barrier is adjusted based on the analysis results, specifically: After the sound barrier is installed, all installable states of the sound barrier are determined, wherein all installable states of the sound barrier record the installation height, installation length and installation thickness of the sound barrier, and different installation states of the sound barrier correspond to different combinations of installation height, installation length and installation thickness; Determine the factory installation state of the sound barrier, and control the installation state of all the installable positions of the sound barrier to be equal to the factory installation state. When the sound barrier is in the factory installation state, continue to simulate the noise sound effect level at different positions in the propagation path; Obtain the noise incident position and noise receiving position of the sound barrier, and determine the noise sound effect levels of the noise incident position and noise receiving position of the sound barrier after the installation of the sound barrier based on the noise sound effect levels at different positions in the propagation path, so as to calculate the noise sound effect level difference after noise reduction; The standard range of noise sound effect level difference after noise reduction is preset. If there is a sound barrier so that the noise sound effect level difference after noise reduction is maintained within the standard range of noise sound effect level difference under both daytime simulation and nighttime simulation, the corresponding sound barrier will be calibrated as a sound barrier with qualified installation status; If the sound barrier cannot maintain the noise sound effect level difference after noise reduction within the noise sound effect level difference standard range under both daytime simulation and nighttime simulation, the sound barrier shall be adjusted to an installable state, and during the installable state adjustment process, the noise sound effect level difference after noise reduction shall be analyzed in real time, and the installable state output that can maintain the noise sound effect level difference after noise reduction within the noise sound effect level difference standard range under both daytime simulation and nighttime simulation shall be selected to obtain a sound barrier with a qualified installation state.

[0029] It should be noted that the noise reduction effect achieved by the sound barrier is different in different installable states. Determine the noise incident position and noise receiving position of the sound barrier. The noise incident position is the incident point at the sound barrier when the noise propagates, and the receiving position is the point after passing the sound barrier. Calculate the noise sound effect level difference of the noise incident position and the noise receiving position of the sound barrier respectively, and analyze them in combination with the standard value. If it is within the standard value, the current installation state of the sound barrier is qualified. If it is not within the standard, it is unqualified and the installation state needs to be adjusted, that is, the height, length and thickness are adjusted accordingly to achieve that the noise sound effect level difference after noise reduction is maintained within the noise sound effect level difference standard range in both daytime simulation and nighttime simulation.

[0030] The second aspect of the present invention further provides a sound barrier scheme design system based on a noise simulation prediction model, the sound barrier scheme design system comprising a memory 31 and a processor 32, the memory 31 stores a sound barrier scheme design method, and when the sound barrier scheme design method is executed by the processor 32, the following steps are implemented: Based on the actual building conditions in the target area and combined with noise simulation and assessment software, a numerical simulation model for environmental noise is constructed; The environmental noise numerical simulation calculation model is used to detect the equivalent sound level during the day and night in the target area, and the environmental noise numerical simulation calculation model is optimized based on the detection results of the equivalent sound level during the day and night. The sound barrier is designed based on the qualified environmental noise numerical simulation model and the 3D structural diagram of the target area, and the installation status of the sound barrier is adjusted based on the noise sound effect levels during the day and night.

[0031] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A noise barrier design method based on a noise simulation prediction model, characterized in that: The following steps are involved: Based on the actual building conditions in the target area and combined with noise simulation and assessment software, a numerical simulation model for environmental noise is constructed; The environmental noise numerical simulation calculation model is used to detect the equivalent sound level during the day and night in the target area, and the environmental noise numerical simulation calculation model is optimized based on the detection results of the equivalent sound level during the day and night. The sound barrier is designed based on the qualified environmental noise numerical simulation model and the 3D structural diagram of the target area, and the installation status of the sound barrier is adjusted based on the noise sound effect levels during the day and night.

2. The method for designing a sound barrier scheme based on a noise simulation prediction model according to claim 1, characterized in that: The numerical simulation model of environmental noise is constructed by combining the actual building conditions in the target area with noise simulation and evaluation software, specifically: Determine the area where the sound barrier needs to be constructed and mark it as the target area, wherein the target area includes all buildings and roads; Obtaining GPS map software, wherein the GPS map software contains a 3D structural diagram of the target area, wherein the 3D structural diagram of the target area draws 3D models of all buildings and roads in the target area in a medium scale; In the target area, all buildings and roads are analyzed, and the roads with names in the GPS map software are identified as roads to be analyzed for noise, and buildings with no less than three floors are identified as buildings to be analyzed for noise; Installing acoustic environment monitoring sensors on the road to be analyzed for noise and the building to be analyzed for noise, wherein the acoustic environment monitoring sensors are devices that can monitor the surrounding noise information of the road to be analyzed for noise and the building to be analyzed for noise; A noise information monitoring standard time is preset, and during the noise information monitoring standard time, the acoustic environment monitoring sensor is used to monitor in real time the surrounding noise information of different noise-to-be-analyzed roads and noise-to-be-analyzed buildings in the target area, Canda / A software is introduced. The Canda / A software is a software that can simulate, evaluate and model the noise of the target area. The 3D structure diagram of the target area and the surrounding noise information of different noise-to-be-analyzed roads and noise-to-be-analyzed buildings in the target area are imported into the Canda / A software to construct a numerical simulation calculation model for environmental noise.

3. The method for designing a sound barrier scheme based on a noise simulation prediction model according to claim 1, characterized in that: The environmental noise numerical simulation calculation model is used to perform day and night equivalent sound level detection in the target area, and the environmental noise numerical simulation calculation model is optimized based on the day and night equivalent sound level detection results, specifically: Preset a single-day noise sound effect level monitoring timestamp, and divide the single-day noise sound effect level monitoring timestamp into a daytime noise sound effect level monitoring timestamp and a nighttime noise sound effect level monitoring timestamp; By using the acoustic environment monitoring sensor, the location where the acoustic environment monitoring sensor is installed is monitored for surrounding noise information during the day and at night in the target area. Based on the surrounding noise information monitored in the target area during the day and at night, the daytime noise sound effect level monitoring timestamp and the nighttime noise sound effect level monitoring timestamp are combined to obtain the daytime noise sound effect monitoring level and the nighttime noise sound effect monitoring level. Import the monitoring timestamps of the daytime noise sound effect level and the monitoring timestamps of the nighttime noise sound effect level into the environmental noise numerical simulation calculation model, and output the predicted daytime noise sound effect level and the predicted nighttime noise sound effect level; Compare the error values ​​of the daytime noise sound effect monitoring level and the nighttime noise sound effect monitoring level with the corresponding daytime noise sound effect prediction level and the nighttime noise sound effect prediction level, and calibrate them as the daytime noise sound effect level error value and the nighttime noise sound effect level error value; Based on the big data network, the standard error range of the daytime noise sound effect level and the standard error range of the nighttime noise sound effect level are determined respectively, and it is judged whether the error value of the daytime noise sound effect level and the error value of the nighttime noise sound effect level are maintained within the standard error range of the daytime noise sound effect level and the standard error range of the nighttime noise sound effect level respectively; If yes, the environmental noise numerical simulation calculation model is calibrated as a qualified environmental noise numerical simulation calculation model; If not, the environmental noise numerical simulation calculation model is optimized by combining the daytime noise sound effect level error value and the nighttime noise sound effect level error value.

4. The method for designing a sound barrier scheme based on a noise simulation prediction model according to claim 3 is characterized in that: The method combines the daytime noise sound effect level error value and the nighttime noise sound effect level error value to optimize the model verification of the environmental noise numerical simulation calculation model, specifically: Based on the environmental noise numerical simulation calculation model, all model parameter combinations are determined, wherein the model parameter combination is a combination of the attenuation coefficient of the environmental noise numerical simulation calculation model and the noise distribution weight parameter Introducing a grid search algorithm, constructing a parameter space in an environmental noise numerical simulation calculation model based on the grid search algorithm, and dividing a parameter grid in the parameter space; Different model parameter combinations are imported into different parameter grids, and singular value decomposition is performed on different model parameter combinations through an environmental noise numerical simulation calculation model to obtain the model parameter combinations after singular value decomposition; Continue to configure the model parameter combination after singular value decomposition through the environmental noise numerical simulation calculation model, so as to obtain the secondary prediction level of daytime noise sound effect and the secondary prediction level of nighttime noise sound effect; Calculate the error between the secondary prediction level of daytime noise and the secondary prediction level of nighttime noise and the monitoring level of daytime noise and the monitoring level of nighttime noise, and select the secondary prediction level of daytime noise and the secondary prediction level of nighttime noise corresponding to the minimum error value, and then reversely deduce to obtain the optimal model parameter combination, which is calibrated as the target model parameter combination; The target model parameter combination is applied in the environmental noise numerical simulation calculation model to obtain a qualified environmental noise numerical simulation calculation model.

5. The method for designing a sound barrier scheme based on a noise simulation prediction model according to claim 1, characterized in that: The sound barrier is designed by combining the qualified environmental noise numerical simulation calculation model and the 3D structure diagram of the target area, and the installation state of the sound barrier is adjusted in combination with the noise sound effect level during the day and night, specifically: Analyze the 3D structural diagram of the target area, determine the residential building among all the buildings to be analyzed for noise, and highlight the residential building in the 3D structural diagram of the target area; Retrieve the traffic volume of the noise-to-be-analyzed road based on the big data network, the traffic volume includes vehicle traffic volume and pedestrian traffic volume, analyze the traffic volume of the noise-to-be-analyzed road, determine the noise-to-be-analyzed road whose traffic volume is greater than a preset value, mark it as a road with high traffic volume, and highlight the road with high traffic volume in the 3D structure diagram of the target area; Based on the 3D structural diagram of the target area with residential buildings and high-traffic roads highlighted, the qualified environmental noise numerical simulation calculation model is updated to obtain a type of environmental noise numerical simulation calculation model; In the above-mentioned environmental noise numerical simulation calculation model, the propagation path of noise in residential buildings and roads with high traffic volume is simulated in real time, and the noise sound effect level at different positions in the propagation path is simulated at the same time, and the simulation process is divided into daytime simulation and nighttime simulation; In the numerical simulation calculation model of the first type of environmental noise, the locations where sound barriers can be installed are determined on residential buildings and roads with high traffic volume, marked as locations where sound barriers can be installed, and sound barriers are installed at the locations where sound barriers can be installed; After the sound barrier is installed, the noise sound effect levels at different locations in the propagation path are analyzed, and the installation status of the sound barrier is adjusted based on the analysis results.

6. The method for designing a sound barrier scheme based on a noise simulation prediction model according to claim 5, characterized in that: After the sound barrier is installed, the noise sound effect levels at different locations in the propagation path are analyzed, and the installation state of the sound barrier is adjusted based on the analysis results, specifically: After the sound barrier is installed, all installable states of the sound barrier are determined, wherein all installable states of the sound barrier record the installation height, installation length and installation thickness of the sound barrier, and different installation states of the sound barrier correspond to different combinations of installation height, installation length and installation thickness; Determine the factory installation state of the sound barrier, and control the installation state of all the installable positions of the sound barrier to be equal to the factory installation state. When the sound barrier is in the factory installation state, continue to simulate the noise sound effect level at different positions in the propagation path; Obtain the noise incident position and noise receiving position of the sound barrier, and determine the noise sound effect levels of the noise incident position and noise receiving position of the sound barrier after the installation of the sound barrier based on the noise sound effect levels at different positions in the propagation path, so as to calculate the noise sound effect level difference after noise reduction; The standard range of noise sound effect level difference after noise reduction is preset. If there is a sound barrier so that the noise sound effect level difference after noise reduction is maintained within the standard range of noise sound effect level difference under both daytime simulation and nighttime simulation, the corresponding sound barrier will be calibrated as a sound barrier with qualified installation status; If the sound barrier cannot maintain the noise sound effect level difference after noise reduction within the noise sound effect level difference standard range under both daytime simulation and nighttime simulation, the sound barrier shall be adjusted to an installable state, and during the installable state adjustment process, the noise sound effect level difference after noise reduction shall be analyzed in real time, and the installable state output that can maintain the noise sound effect level difference after noise reduction within the noise sound effect level difference standard range under both daytime simulation and nighttime simulation shall be selected to obtain a sound barrier with a qualified installation state.

7. A noise barrier scheme design system based on noise simulation prediction model, characterized in that: The sound barrier scheme design system includes a memory and a processor, and a sound barrier scheme design method program is stored in the memory. When the sound barrier scheme design method program is executed by the processor, the sound barrier scheme design method steps as described in any one of claims 1 to 6 are implemented.

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