Wind noise evaluation system around buildings

Abstract

To provide a wind noise evaluation system which is capable of reducing cost required to a measure against wind noise of an exterior member by visualizing the wind noise in a building.SOLUTION: A wind noise evaluation system 10 around a building comprises a wind information acquisition part 11 which acquires wind velocity information and wind direction information in installation location of an exterior member provided along an outer wall surface of the building, a wind noise evaluation part 14 which sets wind noise index value which indicates degree of wind noise by evaluating the wind noise caused by the exterior member on the basis of the wind velocity information and angle with respect to the outer wall surface of the wind direction information in the installation location, and a visualization part 15 of the wind noise which creates distribution map of the wind noise index value. There is shown information based upon the wind noise index value at the installation location in the installation location of the exterior member for the distribution map.SELECTED DRAWING: Figure 1

Description

[[Technical Field]]

[0001] The present invention relates to a wind noise evaluation system for evaluating wind noise around a building. [[Background Art]]

[0002] When constructing a building, noise in the building is evaluated in advance. For example, Patent Document 1 discloses a configuration in which the arrangement of structures such as buildings and barriers and noise sources are input, the sound propagation path is modeled with sound rays based on the input arrangement of structures and noise sources, and the sound pressure level at an observation point is obtained and synthesized for each propagation path using a distance attenuation formula, thereby analyzing the degree and distribution of noise from a plurality of noise sources.

[0003] Incidentally, particularly in high-rise buildings, wind-induced noise (wind noise) may become significant. Wind noise is generated when strong winds or turbulence occurring around a building cause aerodynamic vibration in exterior members such as handrails and louvers, or when fine vortices generated around exterior members generate pressure waves in the surrounding area. Predictive evaluation of wind noise in exterior members is performed, for example, by conducting wind tunnel experiments on full-scale exterior members while changing wind speed and wind direction, and measuring noise with a microphone. Patent Document 2 discloses such a method for evaluating wind noise of exterior materials through wind tunnel experiments, analysis, and the like. In this method, a frequency distribution of difference noise from which background noise is removed is created from measured spectral data related to sound caused by wind hitting a building, an arbitrary number of frequencies with large difference noise are selected, a composite value of the tone purity of the frequency that matches the auditory evaluation of noise and the noise level is obtained for the selected frequencies, and the composite value is used as a predicted value of wind noise for the building.

[0004] If it is determined that there is a possibility of generating wind noise as a result of performing predictive evaluation of wind noise in an exterior member by the method described in Patent Document 2, the exterior member is provided with countermeasures for reducing wind noise. Patent Document 3 discloses a structure for such countermeasures, in which a viscoelastic body is installed in close contact between a plurality of rod-shaped members that are spaced apart and arranged side by side, in order to reduce wind-induced vibration of rod-shaped members supported at both ends. However, applying such measures uniformly to all exterior components of a building would be costly. On the other hand, wind tunnel experiments using building models and numerical simulations of the surrounding environment are being conducted to predict the wind environment around a building. However, because exterior components are extremely small in size relative to the building, it is not easy to accurately evaluate the wind noise generated by each of these exterior components using these methods, which primarily evaluate the wind environment based on the building. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 6-4512 [Patent Document 2] Patent No. 6768479 [Patent Document 3] Patent No. 6893537 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] The problem that this invention aims to solve is to provide a wind noise evaluation system that can reduce the cost required for wind noise countermeasures on exterior components by visualizing wind noise in buildings. Specifically, visualizing wind noise means classifying wind noise levels by strength, etc., or showing the distribution of wind noise countermeasures (areas where wind noise countermeasures are not necessary, areas where attention should be paid, and areas where wind noise countermeasures are necessary). [Means for solving the problem]

[0007] The inventors of the present invention have developed a wind noise evaluation system for evaluating wind noise around buildings. This system evaluates the degree of wind noise generated near exterior components as a wind noise index value based on wind speed and wind direction information around the building, and visualizes this wind noise index value as a distribution map, making it easy to identify areas that require wind noise countermeasures. To solve the above problems, the present invention employs the following means. In other words, the wind noise evaluation system of the present invention is a wind noise evaluation system for evaluating wind noise around a building, comprising: a wind information acquisition unit that acquires wind speed information and wind direction information at the installation position of an exterior member provided along the outer wall surface of the building; a wind noise evaluation unit that evaluates the wind noise generated by the exterior member based on the wind speed information and the angle of the wind direction information with respect to the outer wall surface at the installation position, and sets a wind noise index value indicating the degree of the wind noise; and a wind noise visualization unit that creates a distribution map of the wind noise index value, wherein the distribution map shows information based on the wind noise index value at the installation position of the exterior member. With this configuration, the wind information acquisition unit acquires wind speed information and wind direction information at the installation locations of exterior members installed along the exterior wall surface of the building. The wind speed information at the installation locations of the exterior members is the wind speed relative to the exterior members installed on the exterior wall surface. In addition, the angle of the wind direction information at the installation locations of the exterior members with respect to the building's exterior wall surface is the wind direction relative to the exterior members installed on the exterior wall surface. In this way, the wind speed information and the angle of the wind direction information with respect to the exterior wall surface at the installation locations where the exterior members are installed can be obtained, and the wind noise evaluation unit can evaluate the wind noise generated by each exterior member based on this information. Furthermore, the wind noise evaluation unit evaluates the wind noise generated by the exterior components at each installation location of the exterior components, as described above, and sets a wind noise index value indicating the degree of wind noise. The wind noise visualization unit then creates a distribution map of the wind noise index values ​​set in this way. This distribution map shows information for each installation location based on the wind noise index value set for that location (such as the range of wind noise countermeasures, the range where wind noise countermeasures are not necessary, the range where attention should be paid, and the range where wind noise countermeasures are necessary). As a result, it becomes possible to visualize which parts of the building's exterior components are primarily generating wind noise. The above effects work synergistically to clearly identify exterior components that require wind noise countermeasures. When actually implementing wind noise countermeasures for exterior components, only those components that have been clearly identified as needing countermeasures should be addressed. In this way, by visualizing wind noise in a building, the number of exterior components that require wind noise countermeasures can be reduced, and the cost required for wind noise countermeasures on exterior components can be reduced.

[0008] Furthermore, the wind noise evaluation system of the present invention is a wind noise evaluation system for evaluating wind noise around a building, comprising: a wind noise evaluation unit that sets a wind noise index value indicating the degree of wind noise based on wind noise data obtained from wind noise measurement experiments of exterior members installed along the outer wall surface of the building or members that simulate said exterior members, or a database in which the evaluation results of the wind noise are recorded; and a wind noise visualization unit that creates a distribution map of the wind noise index value, wherein the distribution map shows information based on the wind noise index value at the installation location of the exterior member. With this configuration, the wind speed distribution, determined by the building shape and surrounding urban area, will vary for each building. However, if wind noise data generated from the components themselves, or wind noise evaluation results, obtained from wind tunnel experiments or numerical analyses conducted in the past, are recorded in a database, the accuracy of wind noise evaluation can be improved by evaluating the wind noise generated by similar exterior components from that database.

[0009] In one embodiment of the present invention, the wind noise visualization unit creates the distribution map such that it is possible to distinguish at least the range in which wind noise countermeasures are not necessary, the range in which attention should be paid, and the range in which wind noise countermeasures are necessary. With this configuration, the distribution map of wind noise index values ​​can be displayed in a way that distinguishes between areas where wind noise countermeasures are unnecessary, areas where attention should be paid, and areas where wind noise countermeasures are necessary. This makes it easy to grasp the degree of need for wind noise countermeasures when deciding whether or not to implement them, and can be used to reach a consensus on implementing countermeasures. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a wind noise evaluation system that can reduce the cost required for wind noise countermeasures on exterior components by visualizing wind noise in buildings. [Brief explanation of the drawing]

[0011] [Figure 1] This figure shows the configuration of a wind noise evaluation system around a building according to an embodiment of the present invention. [Figure 2] This figure shows an example of a building that will be evaluated in the wind noise evaluation system around the building mentioned above. [Figure 3] This figure shows an example of the wind speed distribution around a building, obtained by the wind information acquisition unit. [Figure 4] This is an explanatory diagram of the offset surface. [Figure 5] This figure shows an example of a wind velocity vector at the offset plane. [Figure 6] This diagram schematically shows the wind velocity vector at the offset plane. [Figure 7] This figure shows an example of the correspondence between combinations of wind speed and wind direction and wind noise index values ​​for actual exterior components. [Figure 8] This figure shows an example of a distribution map of wind noise index values ​​at the installation locations of each exterior component. [Figure 9]It is a diagram showing the flow of a wind noise evaluation method in the aforementioned wind noise evaluation system around a building. [Figure 10] It is a diagram showing an example of the correspondence between combinations of wind speed and wind direction and wind noise index values for an actual exterior member to which countermeasures against wind noise have been applied. [Figure 11] It is a diagram showing an example of the correspondence between combinations of wind speed and wind direction and wind noise index values for an actual exterior member to which other countermeasures have been applied.

Mode for Carrying Out the Invention

[0012] The present invention evaluates wind noise generated in the vicinity of exterior members of a building from wind speed information and wind direction information around the building, and sets a wind noise index value indicating the degree of the wind noise. This is a wind noise evaluation system that evaluates ranges requiring countermeasures against wind noise (such as ranges where wind noise countermeasures are unnecessary, ranges that require attention, and ranges where wind noise countermeasures are necessary) based on the wind noise index value (for example, FIG. 8). Hereinafter, with reference to the accompanying drawings, modes for carrying out the wind noise evaluation system around a building according to the present invention will be described based on the drawings. FIG. 1 is a diagram showing the configuration of a wind noise evaluation system around a building according to an embodiment of the present invention. FIG. 2 is a diagram showing an example of a building to be evaluated in the aforementioned wind noise evaluation system around a building. The wind noise evaluation system 10 around a building is an information processing device such as a personal computer or a workstation. The wind noise evaluation system 10 functionally includes a wind information acquisition unit 11, a wind tunnel experiment information acquisition unit 13, a wind noise evaluation unit 14, a wind noise visualization unit 15, and a database 17. This wind noise evaluation system 10 around a building evaluates wind noise around the building 1. As shown in Figure 2, the building 1 to be evaluated is, for example, an office building, an apartment building, etc., and is not limited in any way to its specific building form, structure, number of floors, etc. The building 1 is equipped with exterior members 3 provided along the outer wall surface 2 of the building 1. The exterior members 3 are, for example, handrails 4 or louvers provided on the balcony of the building 1, which are members that can generate noise by causing resonance, vibration, etc. when wind such as building wind occurs. The exterior members 3 provided along the outer wall surface 2 are not limited to those arranged on the same plane as the outer wall surface 2, but also include those arranged at a distance from the outer wall surface 2 in a direction perpendicular to the outer wall surface 2. In other words, the exterior members 3 may be arranged to protrude outward from the outer wall surface 2 of the building 1. Multiple exterior members 3 are provided for building 1. Each exterior member 3 is installed at a different installation position P on the outer wall surface 2 of building 1. For example, exterior member 3A in Figure 2 is installed at installation position PA, exterior member 3B is installed at installation position PB, and exterior member 3C is installed at installation position PC.

[0013] The wind information acquisition unit 11 acquires wind speed information and wind direction information at the installation position P of the exterior member 3, which is provided along the outer wall surface 2 of the building 1. To this end, the wind information acquisition unit 11 first acquires wind information, specifically wind speed information and wind direction information, for example, for the entire area surrounding the building 1. Figure 3 shows an example of the wind speed distribution around a building obtained by the wind information acquisition unit. As shown in Figure 3, wind speed information and wind direction information around the building evaluation model are indicated by wind speed vectors V (arrows) at each location in the surroundings. The magnitude of the wind speed vector V represents the wind speed information, i.e., the magnitude of the wind speed, at the location where the wind speed vector V is provided, and the direction, for example, the angle with respect to a preset reference direction, represents the wind direction information, i.e., the wind direction, at that location.

[0014] Wind speed and wind direction information can be obtained by conducting wind tunnel experiments or numerical analysis (simulation) on the building 1 to be evaluated. When conducting wind tunnel experiments, a scale model of building 1 is used. When conducting numerical analysis, an evaluation model that models building 1 is used. The numerical analysis simulates building 1 in the actual location where it will be installed, for example, an urban area. In this case, the numerical analysis uses a 3D model of the evaluation model so that it can evaluate not only the area near the ground but also the upper part of building 1, and the wind speed field near the outer wall surface 2 of the upper part of building 1 is also evaluated. Numerical analysis uses fluid analysis, a numerical fluid analysis technique called CFD (Computational Fluid Dynamics), which can obtain numerical solutions to the governing equations of wind flow. Wind speed and wind direction information may be obtained by inputting the structure of building 1 and the approximate wind direction into a pre-trained model that has been deeply trained to infer wind speed and wind direction information. The wind speed and wind direction information obtained in this manner is temporarily stored in the database 17, and the wind information acquisition unit 11 retrieves the wind speed and wind direction information by referring to the database 17 as needed. Alternatively, database 17 may store wind speed and wind direction information for the surrounding area of ​​similar buildings, such as the entire area, obtained through wind tunnel experiments, numerical analyses, or inference using trained models that were previously conducted on similar buildings similar to building 1. In this case, the wind speed and wind direction information of the similar building can be used as a substitute for the wind speed and wind direction information of building 1, without having to conduct wind tunnel experiments, numerical analyses, or inference using trained models again on the target building 1.

[0015] The wind information acquisition unit 11 acquires wind speed information and wind direction information from the database 17 as wind conditions at the installation position P of the exterior member 3 which is provided along the outer wall surface 2 of the building 1. Exterior components 3, especially when they are balcony railings 4, are often positioned at a distance from the exterior wall surface 2 in a direction perpendicular to the exterior wall surface 2. Taking such cases into consideration, an offset surface F (see Figure 2) parallel to the exterior wall surface 2 is set at a predetermined distance horizontally from the exterior wall surface 2 of the building 1, depending on the distance from the exterior wall surface 2 where the actual exterior components 3 are installed. Figure 4 is an explanatory diagram of the offset surface. The offset surface F is set, for example, at a position approximately 1 to 3 m horizontally away from the outer wall surface 2. Figure 5 shows an example of a wind velocity vector at the offset plane. The wind information acquisition unit 11 extracts the wind velocity vector Vf at the offset plane F position from among the multiple wind velocity vectors V obtained in the manner described above for the entire area surrounding the building 1, as shown in Figure 5.

[0016] Figure 6 schematically shows the wind velocity vector at the offset plane. The wind information acquisition unit 11 further acquires wind speed information and wind direction information for each of the multiple exterior members 3 individually, at the installation position P where the exterior member 3 is installed. Specifically, the wind information acquisition unit 11 calculates the installation position P where each of the multiple exterior members 3 is installed, and extracts the wind speed vector Vf corresponding to the position closest to the installation position P from among the wind speed vector Vf at the offset plane F, thereby acquiring wind speed information and wind direction information at the installation position P where the exterior member 3 is installed. For example, with respect to the exterior member 3A in Figure 6, the wind speed vector Vf corresponding to the position closest to the installation position PA where the exterior member 3A is installed is the wind speed vector VfA. Therefore, this wind speed vector VfA is selected and acquired as the wind speed information and wind direction information for the installation position PA where the exterior member 3A is installed, corresponding to the exterior member 3A. Similarly, for exterior members 3B and 3C, the wind speed vectors VfB and VfC are selected and acquired as the wind speed information and wind direction information for the installation positions PB and PC where the exterior members 3B and 3C are installed.

[0017] The wind tunnel experiment information acquisition unit 13 acquires information regarding wind noise measurement experiments conducted using the actual exterior component 3 or a component that simulates the exterior component 3. If the wind noise measurement experiment is, for example, a wind tunnel experiment, the wind tunnel experiment conducted using the actual exterior component 3 or a component that simulates the exterior component 3 is performed in a wind tunnel laboratory or the like, with the actual exterior component 3 or a component that simulates the exterior component 3 placed in an airflow, and the wind speed and wind direction of the airflow are varied in various ways to measure the noise level and evaluate the wind noise for multiple combinations of wind speed and wind direction. In this case, the noise level may be quantitatively evaluated by measuring noise data such as sound pressure spectra with a sound level meter, or it may be judged by a person actually listening to the sound. In this embodiment, a wind noise index value indicating the degree of wind noise is set based on the noise level. The wind noise index value is set as, for example, one of the following six levels. Wind noise index value 0: No wind noise is emitted. Wind noise index value 1: A slight sound that can be heard if you listen carefully. Wind noise index value 2: Faintly audible sounds Wind noise index value 3: Clearly audible pronunciation Wind noise index value 4: Clear and highly likely to cause disturbances Wind noise index value 5: Very loud, clearly disruptive sound.

[0018] Figure 7 shows an example of the correspondence between wind speed, wind direction, and wind noise index values ​​for an actual exterior component. In Figure 7, wind noise index values ​​are set for each of the following cases: wind speed for the exterior component 3 is set to a value between 2.5 m / s and 25 m / s in 2.5 m / s increments, and wind direction is set to a value between 0° and 90° in 15° increments. As described above, wind tunnel experiments provide wind tunnel experiment information (for example, wind noise experiment data for exterior members) that shows the level of wind noise generated when wind of various wind speeds and directions strikes the actual exterior member 3, as shown in Figure 7. Thus, wind tunnel experiment information shows the correspondence between multiple combinations of wind speed and wind direction for the actual exterior member 3, or a member simulating the exterior member 3, and wind noise index values ​​set based on the noise levels of wind noise generated when the wind that realizes that combination strikes the exterior member 3. In addition, the areas marked with an "x" in Figure 7 indicate cases where vibration occurs in the exterior member 3 due to airflow. In this embodiment, such wind tunnel experiment information, that is, the correspondence between combinations of wind speed and wind direction and wind noise index values, is stored in the database 17 in advance as wind noise data or wind noise evaluation results. Alternatively, wind tunnel experiment information may be input externally to the wind noise evaluation system 10 around the building when evaluating the wind noise of building 1. The wind tunnel experiment information acquisition unit 13 acquires wind tunnel experiment information from the database 17 if the wind tunnel experiment information is stored in the database 17 in advance. Also, if the wind tunnel experiment information acquisition unit 13 does not acquire wind tunnel experiment information from an external source when evaluating the wind noise of building 1, it does so.

[0019] The wind noise evaluation unit 14 evaluates the wind noise generated by the exterior members 3. Based on the wind speed vector Vf extracted by the wind information acquisition unit 11, the wind noise evaluation unit 14 acquires the wind speed and wind direction at each installation position P of each exterior member 3. Specifically, the wind noise evaluation unit 14 acquires the wind speed vector Vf at the installation position P for each exterior member 3. For each exterior member 3, the wind noise evaluation unit 14 acquires the magnitude of the acquired wind speed vector Vf as wind speed information of the wind acting on the exterior member 3 installed at the said installation position P. The wind noise evaluation unit 14 also calculates the wind direction of the wind acting on the exterior member 3 installed at the said installation position P for each exterior member 3 from the angle of the wind direction information of the acquired wind speed vector Vf with respect to the outer wall surface 2. The wind noise evaluation unit 14 acquires and sets a wind noise index value for each of the exterior members 3, corresponding to the combination of wind speed information and wind direction acquired as described above, from the correspondence between the combination of wind speed and wind direction and the wind noise index value stored in the database 17. The wind noise index values ​​acquired in this way represent the noise level generated by each of the exterior members 3 when wind, represented by the wind speed information and wind direction information acquired by the wind information acquisition unit 11, blows around the building 1. In this way, the wind noise evaluation unit 14 evaluates the wind noise generated by each of the exterior members 3 and sets a wind noise index value for each of the exterior members 3. The wind noise evaluation unit 14 stores in the database 17 information obtained in this manner, which shows the correspondence between the combination of wind speed and wind direction at the installation position P of each exterior member 3 and the wind noise index value.

[0020] Figure 8 shows an example of a distribution map of wind noise index values ​​at the installation location of each exterior component. As shown in Figure 8, the wind noise visualization unit 15 creates a distribution map D in which information based on the wind noise index value at each installation position P of the exterior member 3 (such as the range where wind noise countermeasures are not necessary, the range where attention should be paid, and the range where wind noise countermeasures are necessary) is shown along with the outline of the building 1. In this embodiment, the wind noise visualization unit 15 uses different colors or shades of gray to represent the information based on the wind noise index value. That is, the wind noise visualization unit 15 creates the distribution map D so that the wind noise index value can be identified by color or shade. In Figure 8, the range corresponding to a wind noise index value of 1 is shown as range A1. Similarly, the ranges corresponding to wind noise index values ​​of 2, 3, 4, and 5 are shown as ranges A1, A2, A3, A4, and A5, respectively. In Figure 8, there is no range A0 corresponding to a wind noise index value of 0, and therefore it is not shown. However, if range A0 exists, it would be shown in distribution map D in the same way as ranges A1, A2, A3, A4, and A5.

[0021] Here, the area A1 (including the area A0, if it exists, where the wind noise index value corresponds to 0) corresponds to wind noise index values ​​of 0 or 1, is considered, for example, an area where no wind noise countermeasures are necessary. The areas A2 and A3 (where the wind noise index value corresponds to 2 or 3) are considered, for example, areas where wind noise should be taken into consideration. The areas A4 and A5 (where the wind noise index value corresponds to 4 or 5) are considered, for example, areas where wind noise countermeasures are necessary. In this way, the wind noise visualization unit 15 creates a distribution map D such that, according to the wind noise index value, at least three types of areas can be distinguished: areas A0 and A1 where no wind noise countermeasures are necessary, areas A2 and A3 where wind noise should be taken into consideration, and areas A4 and A5 where wind noise countermeasures are necessary. In this embodiment, as shown in Figure 8, the distribution map D is created to distinguish six different ranges according to each of the six values ​​of the wind noise index. However, instead, the distribution map D may be created using three different colors or shades so that three different ranges can be distinguished: ranges A0 and A1 where wind noise countermeasures are not necessary, ranges A2 and A3 where wind noise should be taken into consideration, and ranges A4 and A5 where wind noise countermeasures are necessary. In any case, the wind noise visualization unit 15 creates a distribution map D based on at least the wind noise index value information, so that it is possible to distinguish between areas A0 and A1 where no wind noise countermeasures are necessary, areas A2 and A3 where attention should be paid, and areas A4 and A5 where wind noise countermeasures are necessary. The wind noise visualization unit 15 displays the created distribution map D on a monitor device or the like.

[0022] Database 17 stores various types of information necessary for processing in the wind noise evaluation system 10 around the building. For example, database 17 stores information showing the results of wind noise evaluations performed in multiple buildings 1 as described above, namely wind speed information and wind direction information. Furthermore, database 17 stores wind tunnel experiment information obtained from wind tunnel experiments conducted using actual exterior components 3 or components that simulate exterior components 3, namely the correspondence between combinations of wind speed and wind direction and wind noise index values.

[0023] Next, we will explain the wind noise evaluation method in the wind noise evaluation system 10 around the building described above. Figure 9 shows the flow of the wind noise evaluation method in the wind noise evaluation system around the building described above. As shown in Figure 9, in order to evaluate wind noise for building 1 using the building-related wind noise evaluation system 10, first, the wind information acquisition unit 11 acquires wind information, i.e., wind speed information and wind direction information, for the entire area surrounding building 1, as shown in Figure 3 (step S11). Here, the wind information acquisition unit 11 may acquire wind speed information and wind direction information from the database 17 for the surrounding area of ​​a similar building, for example, the entire area, which has been obtained from wind tunnel experiments, numerical analysis, or inference using trained models that have been previously conducted on similar buildings similar to Building 1. Next, as shown in Figures 2 and 4, the wind information acquisition unit 11 sets an offset surface F parallel to the exterior wall surface 2 at a position a predetermined distance horizontally from the exterior wall surface 2 of the building 1, according to the distance from the exterior wall surface 2 on which the exterior member 3 is installed (step S12). Next, the wind information acquisition unit 11 extracts the wind velocity vector Vf at the offset plane F from among the multiple wind velocity vectors V obtained in the manner described above for the entire area surrounding the building 1 (step S13).

[0024] Next, the wind information acquisition unit 11 further acquires wind speed information and wind direction information for each of the multiple exterior members 3 individually at the installation position P where the exterior member 3 is installed (step S14). Furthermore, the wind tunnel experiment information acquisition unit 13 acquires wind tunnel experiment information (see Figure 7) related to wind tunnel experiments conducted using the actual exterior member 3 or a member that simulates the exterior member 3 (step S15). The wind tunnel experiment information is information that shows the correspondence between multiple combinations of wind speed and wind direction for the actual exterior member 3 or a member that simulates the exterior member 3, and wind noise index values ​​set based on the noise values ​​of wind noise generated when the wind that realizes that combination strikes the exterior member 3. Subsequently, the wind noise evaluation unit 14 evaluates the wind noise generated by the exterior members 3 (step S16). The wind noise evaluation unit 14 acquires the wind speed vector Vf at the installation position P for each of the exterior members 3. For each of the exterior members 3, the wind noise evaluation unit 14 acquires the magnitude of the acquired wind speed vector Vf as wind speed information of the wind acting on the exterior member 3 installed at the installation position P. The wind noise evaluation unit 14 also calculates the wind direction acting on the exterior member 3 installed at the installation position P for each of the exterior members 3 from the angle of the wind direction information of the acquired wind speed vector Vf with respect to the outer wall surface 2. For each of the exterior members 3, the wind noise evaluation unit 14 acquires and sets a wind noise index value corresponding to the combination of wind speed information and wind direction acquired as described above, from the correspondence between the combination of wind speed and wind direction and the wind noise index value stored in the database 17.

[0025] Next, the wind noise visualization unit 15 creates a distribution map D in which information based on the wind noise index value at each installation position P of the exterior member 3 is shown along with the outline of the building 1. The wind noise visualization unit 15 displays the created distribution map D on a monitor device or the like (step S17). The designers of Building 1 can look at the displayed distribution map D and consider improvements to reduce wind noise in Building 1. For example, regarding areas A4 and A5 where wind noise countermeasures are needed, Countermeasure 1) Add a member to the exterior member 3, for example, for reinforcement. Countermeasure 2) Addition of vibration-damping material to exterior component 3 We will consider the following. Figure 10 shows an example of the correspondence between wind speed, wind direction combinations and wind noise index values ​​for an actual exterior component to which countermeasure 1) is applied. Figure 11 shows an example of the correspondence between wind speed, wind direction combinations and wind noise index values ​​for an actual exterior component to which countermeasure 2) is applied. These correspondences can be obtained, for example, by actually adding reinforcing members and vibration-damping materials to the exterior component 3, as in Figure 7, and then conducting wind tunnel experiments for multiple combinations of wind speed and wind direction on the exterior component 3 with the added reinforcing members and vibration-damping materials, and measuring the noise levels.

[0026] For example, in the case of exterior member 3 shown in Figure 7, when a wind of 17.5 m / s and a wind direction of 0° acts on it, the wind noise index value is shown as 5, indicating that wind noise countermeasures are necessary. In this case, for example, if additional members are added for reinforcement, the wind noise index value becomes 3, as shown in Figure 10, showing that wind noise is reduced. Furthermore, in the case of exterior member 3 as shown in Figure 7, when a wind of 7.5 m / s and a wind direction of 30° acts on it, the wind noise index value is shown as 3. This indicates that wind noise should be taken into consideration, but it is not determined that countermeasures against wind noise are necessary. However, in this case, vibration occurs in exterior member 3, and countermeasures are desirable. Here, for example, even if additional members are added for reinforcement, as shown in Figure 10, vibration still occurs when a wind of 7.5 m / s and a wind direction of 30° acts on it. In this case, it can be seen that adding vibration-damping material reduces the vibration, as shown in Figure 11 for the case when a wind of 7.5 m / s and a wind direction of 30° acts on it. Therefore, as a countermeasure, it is desirable to add vibration-damping material.

[0027] The wind noise evaluation system 10 described above is a wind noise evaluation system 10 for evaluating wind noise around a building 1, and comprises: a wind information acquisition unit 11 that acquires wind speed information and wind direction information at the installation position P of an exterior member 3 provided along the outer wall surface 2 of the building 1; a wind noise evaluation unit 14 that evaluates the wind noise generated by the exterior member 3 based on the wind speed information and the angle of the wind direction information with respect to the outer wall surface 2 at the installation position P, and sets a wind noise index value indicating the degree of wind noise; and a wind noise visualization unit 15 that creates a distribution diagram D of the wind noise index value, and the distribution diagram D shows information based on the wind noise index value at the installation position P of the exterior member 3. With this configuration, the wind information acquisition unit 11 acquires wind speed information and wind direction information at the installation position P of the exterior member 3, which is installed along the outer wall surface 2 of the building 1. The wind speed information at the installation position P of the exterior member 3 is the wind speed relative to the exterior member 3 installed on the outer wall surface 2. In addition, the angle of the wind direction information at the installation position P of the exterior member 3 with respect to the outer wall surface 2 of the building 1 is the wind direction relative to the exterior member 3 installed on the outer wall surface 2. In this way, the wind speed information and the angle of the wind direction information with respect to the outer wall surface 2 at the installation position P where the exterior member 3 is installed can be obtained, and based on this, the wind information acquisition unit 11 can evaluate the wind noise generated by the exterior member 3 for each exterior member 3. Furthermore, the wind noise evaluation unit 14 evaluates the wind noise generated by the exterior members 3 at each installation location P of the exterior members 3 as described above, and sets a wind noise index value indicating the degree of wind noise. The wind noise visualization unit 15 then creates a distribution map D of the wind noise index values ​​set in this manner. This distribution map D shows information based on the wind noise index value set for each installation location P. As a result, it is possible to visualize which part of the building 1 is mainly generating wind noise due to the exterior members 3. The above effects work synergistically to clearly identify the exterior components 3 that require wind noise countermeasures. When actually implementing wind noise countermeasures for the exterior components, countermeasures only need to be implemented for the exterior components 3 that have been clearly identified as requiring countermeasures. In this way, by visualizing the wind noise in building 1, the number of exterior components 3 that require wind noise countermeasures is reduced, and the cost required for wind noise countermeasures for the exterior components 3 can be reduced.

[0028] Furthermore, the wind noise evaluation system 10 described above is a wind noise evaluation system 10 for evaluating wind noise around a building 1, and comprises a wind noise evaluation unit 14 that sets wind noise index values ​​indicating the degree of wind noise based on wind noise data obtained from wind noise measurement experiments of exterior members 3 or members that simulate the exterior members 3 installed along the outer wall surface 2 of the building 1, or a database 17 in which wind noise evaluation results are recorded, and a wind noise visualization unit 15 that creates a distribution map D of wind noise index values, and the distribution map D shows information based on the wind noise index value at the installation position P of the exterior member 3. With this configuration, the wind speed distribution determined by the building shape and surrounding urban area changes for each target building 1. However, if wind noise data generated from the components themselves, or wind noise evaluation results obtained from wind tunnel experiments or numerical analyses conducted in the past, are recorded in a database 17, the accuracy of wind noise evaluation can be improved by evaluating the wind noise generated by similar exterior components 3 from the database 17.

[0029] Furthermore, wind speed and wind direction information is obtained by conducting wind tunnel experiments or numerical analyses on building 1, or by obtaining wind speed and wind direction information for similar buildings 1 that are similar to building 1, from a database 17 (such as a database covering the area around similar buildings or a database covering the area around exterior components) that stores wind speed and wind direction information for such similar buildings, obtained through wind tunnel experiments or numerical analyses previously conducted on similar buildings 1. With this configuration, wind speed and wind direction information is obtained by conducting wind tunnel experiments or numerical analyses on building 1. Alternatively, if the database 17 stores wind speed and wind direction information obtained from wind tunnel experiments or numerical analyses previously conducted on similar buildings similar to the target building 1, and this information is acquired as wind speed and wind direction information. By evaluating the wind noise generated by the exterior member 3 at the installation position P of the exterior member 3 based on the wind speed and wind direction information thus acquired, the accuracy of the wind noise evaluation is improved.

[0030] Furthermore, the wind noise visualization unit 15 creates a distribution map D so that at least the areas where wind noise countermeasures are unnecessary, areas where attention should be paid, and areas where wind noise countermeasures are necessary can be distinguished. With this configuration, the distribution map D of wind noise index values ​​can be displayed in a way that distinguishes between areas where wind noise countermeasures are unnecessary, areas where attention should be paid, and areas where wind noise countermeasures are necessary. This makes it easy to grasp the degree of need for wind noise countermeasures when deciding whether or not countermeasures are necessary, and can be used to reach a consensus on implementing countermeasures.

[0031] Furthermore, wind tunnel experiments were conducted on the exterior component 3 with multiple combinations of wind speed and wind direction. Based on the noise values ​​measured for each combination, a wind noise index value was set for each combination, and the correspondence between the combinations and the wind noise index values ​​is stored in the database 17. Furthermore, the wind noise evaluation unit 14 calculates the wind direction relative to the exterior member 3 installed at each installation location P from the angle of the wind direction information at that installation location P relative to the exterior wall surface 2, and sets the wind noise index value for that installation location P by obtaining a wind noise index value from the database 17 that corresponds to the combination of wind speed information and wind direction at that installation location P. With this configuration, considering the installation position P at which each exterior member 3 is provided, the wind speed and wind direction at that installation position P are determined, and wind noise index values ​​are obtained from the database 17 when the wind that results from that combination of wind speed and wind direction hits the exterior member 3. In this way, wind noise can be accurately estimated, reflecting the installation position P of each exterior member 3. [Explanation of Symbols]

[0032] 1 Building 17 Databases 2. Exterior wall surfaces A0, A1: Areas where wind noise countermeasures are not required. 3, 3A, 3B, 3C Exterior components A2, A3 Area where wind noise should be considered 10 Wind Noise Evaluation System A4, A5 Area where wind noise countermeasures are necessary 11 Wind Information Acquisition Unit D Distribution Map 14. Wind noise evaluation section: Installation locations of P, PA, PB, and PC. 15. Visualization section for wind noise

Claims

1. A wind noise evaluation system for evaluating wind noise around a building, A wind information acquisition unit that acquires wind speed information and wind direction information at the installation location of an exterior member provided along the exterior wall surface of the building, At the aforementioned installation location, a wind noise evaluation unit evaluates the wind noise generated by the exterior member based on the wind speed information and the angle of the wind direction information with respect to the exterior wall surface, and sets a wind noise index value indicating the degree of the wind noise. A wind noise visualization unit that creates a distribution map of the wind noise index values, Equipped with, The wind noise evaluation system around a building is characterized in that the distribution map shows information based on the wind noise index value at the installation location of the exterior member.

2. The wind noise visualization unit is characterized in that it creates a distribution map so that at least the areas where wind noise countermeasures are unnecessary, areas where attention should be paid, and areas where wind noise countermeasures are necessary can be distinguished, as described in claim 1, for the wind noise evaluation system around a building.

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