JP7100596B2 - Cross-section design equipment, cross-section design methods, computer programs, and storage media - Google Patents

Description

The present invention relates to a cross-sectional design device for designing a cross-sectional shape of an object.

Vehicle horns must meet, for example, the safety standards of road vehicles. Therefore, conventionally, a technique for predicting the sound pressure and sound pressure level of a horn from a vehicle (hereinafter, the sound pressure and the sound pressure level are collectively referred to simply as "sound pressure") has been studied. For example, Patent Document 1 discloses a technique for predicting sound pressure by using an acoustic model of a horn as an input to an acoustic model of a vehicle.

US Pat. No. 8,515,717

By the way, the horn of the vehicle may be arranged inside the front grill of the vehicle. In such cases, the front grill may block the sound of the horn. Therefore, it is desired to design the shape of the front grill so that the sound pressure of the horn of the vehicle satisfies the reference value (for example, the legal reference value). Such techniques are not limited to the front grille of vehicles, but are desired for various shields in products having shields that shield sound.

The present invention has been made to solve the above-mentioned problems, and provides a technique capable of designing a cross-sectional shape of a shield having an appropriate sound pressure for sound radiated through a shield that shields sound. The purpose is to do.

The present invention has been made to solve the above-mentioned problems, and can be realized as the following forms.

(1) According to one embodiment of the present invention, a cross-sectional design device for designing a cross-sectional shape of a shield is provided. The shield shields the sound emitted from the sound source, and includes an opening through which the sound can be transmitted. This cross-sectional design device takes a plurality of variables that define the cross-sectional shape as inputs, and outputs a frequency at which the transmitted sound pressure of the sound emitted from the opening through the shield does not satisfy the target sound pressure. Using the storage unit that stores the model, the main frequency component acquisition unit that acquires the main frequency component of the sound source, the main frequency component, and the regression model, the transmitted sound pressure is the target sound pressure. It is provided with a cross-sectional information generation unit that generates cross-sectional information indicating a design space of the cross-sectional shape of the shield that satisfies the above conditions.

Here, the sound pressure is a concept including the sound pressure [Pa] and the sound pressure level [dB].
According to this configuration, it is possible to present a design space having a cross-sectional shape of the shield so that the transmitted sound pressure of the sound emitted from the opening of the shield satisfies the target sound pressure. Therefore, the user can appropriately design the shield whose transmitted sound pressure satisfies the target sound pressure by designing the cross-sectional shape of the shield in detail so as to be the presented design space. In addition, when predicting the transmitted sound pressure using drawing data after the detailed design is completed, it may take time and cost to change the design if the prediction result is inappropriate. On the other hand, according to this configuration, it is possible to present a design space having a cross-sectional shape of a shield that satisfies the target sound pressure before performing the detailed design, so that it is possible to suppress an increase in time and cost.

(2) The cross-section design device of the above embodiment, and further, a regression model generation unit that generates the regression model using the plurality of variables and the frequency characteristics of the transmitted sound pressure corresponding to the plurality of variables. May be provided. In this way, the regression model is generated in the cross-section design device. Therefore, for example, the user can set the conditions such as the shape of the shield and the shape of the opening in detail to improve the appropriateness of the regression model. Can be improved. Therefore, the cross-section information can be generated by using a more appropriate regression model, and the accuracy of the cross-section information can be improved.

(3) The cross-sectional design device of the above embodiment further includes a constraint condition acquisition unit that acquires a constraint condition that constrains the cross-sectional shape of the shield, and the cross-sectional information generation unit further uses the constraint condition. The cross-section information may be generated. By doing so, the cross-section information can be simplified, such as by reducing the number of dimensions of the cross-section information, so that the convenience when the user uses the cross-section information can be improved.

(4) The cross-section design device of the above-described embodiment may further include an image information generation unit that generates image information indicating a cross-section information image including a figure corresponding to the cross-section information. By doing so, since the design space can be illustrated by using the image information, the user can visually recognize the design space in the figure, and the convenience of the user can be improved.

(5) The cross-section design device of the above-described embodiment is further provided with a display unit, and the display unit may display the cross-section information image based on the image information. By doing so, the convenience of the user can be further improved.

(6) In the cross-section design device of the above embodiment, the shield may be a front grill, and the sound source may be a vehicle horn. In this way, it is possible to easily design a front grill that makes the transmitted sound pressure appropriate.

The present invention can be realized in various aspects, for example, a cross-sectional design method, a computer program for causing a computer to execute this method, a storage medium for storing the program, and a carrier including the computer program. It can be realized in the form of a data signal or the like embodied inside.

It is explanatory drawing which conceptually shows the front grille and the horn of the vehicle which the cross-section design apparatus targets. It is explanatory drawing which shows the variable which defines the cross-sectional shape of a grill member. It is a block diagram which functionally shows the structure of the cross-section design apparatus of 1st Embodiment. It is a figure which shows the regression model. It is a flowchart which shows the flow of the cross-section design process in a cross-section design apparatus. It is a figure which shows the frequency spectrum of the horn as a sound source. It is explanatory drawing which shows the cross-sectional information image schematically. It is a block diagram which functionally shows the structure of the cross-section design apparatus of 2nd Embodiment. It is a flowchart which shows the flow of the regression model generation process. It is explanatory drawing for demonstrating the numerical calculation model for generating a regression model. It is a figure which shows the frequency characteristic of a transmitted sound pressure.

<First Embodiment>
The cross-sectional design device 10 as an embodiment of the present invention is a device that presents a design space having a cross-sectional shape of a shield in which the transmitted sound pressure of the sound radiated through the shield satisfies the target sound pressure. Here, the shield shields the sound emitted from the sound source, and includes an opening through which the sound can be transmitted. In this embodiment, a vehicle sound source (hereinafter, also referred to as “horn”) is exemplified as a sound source, and a vehicle front grill is exemplified as a shield. The cross-sectional design device 10 presents a design space for the cross-sectional shape of the front grill where the sound radiated from the horn satisfies the legal reference sound pressure. In this embodiment, the cross-section design device 10 is used in the initial stage of product development before the detailed design of the vehicle is performed.

FIG. 1 is an explanatory diagram conceptually showing a front grill FG of a vehicle targeted by the cross-section design device 10 of the present embodiment and horns HN1 and HN2 as sound sources. FIG. 1 illustrates a state in which the front surface of the vehicle is visually recognized from the outside (front) of the vehicle. As shown in FIG. 1, the front grill FG includes three grill members G1, G2, and G3, whereby four slit-shaped openings S1, S2, S3, and S4 are formed. The three grill members G1, G2, and G3 have the same shape. The horns HN1 and HN2 are arranged inside the vehicle and on the back side (rear side) of the openings S1 to S4 of the front grill FG. The horns HN1 and HN2 are the same horn, and the main frequency components of the sound emitted from the horns HN1 and HN2 are the same. The sound radiated from the horns HN1 and HN2 is mainly radiated through the openings S1, S2, S3 and S4. In the following description, when the horns HN1 and HN2 are not distinguished, they are simply referred to as "horn HN", and when the grill members G1, G2 and G3 are not distinguished, they are simply referred to as "grill member G".

FIG. 2 is an explanatory diagram showing variables that define the cross-sectional shape CS of the grill member G. FIG. 2 shows the aa'cut surface of the grill member G2 shown in FIG. In the present embodiment, the cross-sectional shape CS of the grill member G is defined by the depth X, the back height Y, and the front height Z. The a'a'cut plane is a cut plane formed by a plane orthogonal to the sound wave plane of the sound emitted from the horn HN. The cross-sectional design device 10 of the present embodiment presents a design space for the cross-sectional shape of the grill member G of the front grill FG as a shield.

FIG. 3 is a block diagram functionally showing the configuration of the cross-sectional design device 10 as an embodiment of the present invention. The cross-section design device 10 includes a CPU 110, a storage unit 120, a RAM 130, an input I / F unit 140, and an output I / F unit 150. These components are interconnected by a bus. The CPU 110 controls the overall operation of the cross-section design device 10 by expanding the program 124 stored in the storage unit 120 into the RAM 130. An operation unit 160 such as a keyboard or a mouse is connected to the input I / F unit 140, and a display unit 170 such as a liquid crystal display is connected to the output I / F unit 150.

By executing the program 124 stored in the storage unit 120, the CPU 110 realizes the functions of the cross-section information generation unit 111, the main frequency component acquisition unit 112, the constraint condition acquisition unit 113, and the image information generation unit 114.

The cross-sectional information generation unit 111 inputs the main frequency component (described later) of the horn as a sound source and the constraint conditions (described later) into the regression model 122 (described later) stored in the storage unit 120, and inputs the horn HN. Of the sounds from, the sound pressure level of the transmitted sound transmitted through the front grill FG generates cross-sectional information indicating the design space of the cross-sectional shape CS that satisfies the reference sound pressure. The reference sound pressure in this embodiment is also referred to as a "target sound pressure".

The main frequency component acquisition unit 112 acquires the main frequency component of the horn HN (described later). The constraint condition acquisition unit 113 receives the constraint condition input via the operation unit 160 and stores it in the storage unit 120. In this embodiment, an example is shown in which the front height Z is restricted by the design.

As the storage unit 120, for example, a hard disk, a storage medium, a non-volatile memory, a storage device (SSD) composed of the non-volatile memory, or the like can be used. The regression model 122 and the program 124 are stored in the storage unit 120.

FIG. 4 is a diagram showing a regression model 122. In the regression model 122, the variables X, Y, and Z defining the cross-sectional shape CS (FIG. 2) of the grill member G are input, and the sound pressure level of the transmitted sound transmitted through the front grill FG of the sound radiated from the horn HN is set. , The output is a frequency that does not meet the legal reference sound pressure as the target sound pressure. For example, the safety standards for road transport vehicles in Japan stipulate that the sound pressure level is 87 dB (decibel) or higher as the reference sound pressure. Assuming that "sound pressure reference value = 87 dB", the "reference sound pressure" is "greater than or equal to the sound pressure reference value". In the case of this example, the regression model 122 inputs the variables X, Y, and Z, and outputs a frequency having a transmitted sound pressure of less than 87 dB (decibel). In FIG. 4, frequencies that do not satisfy the reference sound pressure are shown by gradations in which the density of dot hatching is changed for each arbitrary frequency. In the present embodiment, the regression model 122 generated in advance is stored in the storage unit 120.

FIG. 5 is a flowchart showing the flow of the cross-section design process in the cross-section design device 10. FIG. 6 is a diagram showing a frequency spectrum FS of the horn HN as a sound source. In FIG. 6, the frequency is shown on the horizontal axis and the sound pressure level is shown on the vertical axis. When the cross-section design device 10 receives the instruction to start the cross-section design process, the cross-section design process is started.

As shown in FIG. 5, in step S104, the main frequency component acquisition unit 112 acquires the main frequency component of the horn HN as a sound source. Specifically, the main frequency component acquisition unit 112 acquires the frequency spectrum FS (FIG. 6) of the sound pressure level of the horn HN, analyzes the frequency spectrum FS, and has the highest sound pressure level among the peak frequencies2. The two frequencies f ₁ and f ₂ are specified as the main frequency components. In the above regulations, the reference sound pressure is defined by the sum of the sounds of a plurality of frequencies included in the sound of the horn HN, and in the present embodiment, the sum of the sounds of the frequencies f ₁ and f ₂ is almost the sum. Since they are equivalent, the frequencies f ₁ and f ₂ are specified as the main frequency components. In the present embodiment, the sound pressure level of the horn HN is measured by using the sound pressure level measuring meter, and the main frequency component acquisition unit 112 of the horn HN via the input I / F unit 140 from the sound pressure level measuring meter. The frequency spectrum FS of the sound pressure level is acquired. In another embodiment, the main frequency component acquisition unit 112 may acquire the frequency spectrum FS by calculating the sound pressure level.

In step S106, the constraint condition acquisition unit 113 acquires the constraint condition via the input I / F unit 140. In the present embodiment, there is a restriction due to the design of the front grill FG, and the front height Z (FIG. 2) of the grill member G is restricted to Z = Z _C. The user inputs Z = Z _C as a constraint condition via the operation unit 160.

In step S108, the cross-sectional information generation unit 111 inputs the main frequency component acquired in step 104 and the constraint conditions acquired in step S106 into the regression model 122 stored in the storage unit 120, and cross-sectional information. To generate.

In step S110, the image information generation unit 114 generates image information indicating a cross-section information image including a diagram corresponding to the cross-section information generated by the cross-section information generation unit 111, and displays the image information via the output I / F unit 150. Output to unit 170. The display unit 170 displays a cross-sectional information image based on the image information.

FIG. 7 is an explanatory diagram schematically showing a cross-sectional information image IMG. The cross-sectional information image IMG is a diagram showing a space in which the transmitted sound pressure satisfies the reference sound pressure and a space in which the transmitted sound pressure does not satisfy the reference sound pressure in the design space of the cross-sectional shape CS defined by the variable X and the variable Y. In FIG. 7, the space where the transmitted sound pressure satisfies the reference sound pressure is surrounded by a thick line frame and is displayed as “OK”. In FIG. 7, when the grill member G having the cross-sectional shape CS defined by the variables X and Y is used, the frequencies that do not satisfy the reference sound pressure are shown by gradations in which the dot hatching densities are changed for each arbitrary frequency. At the same time, diagonal hatching is attached to the space corresponding to the main frequency component f ₁ , and cross hatching is attached to the space corresponding to the main frequency component f ₂ . That is, if the frequency that does not satisfy the reference sound pressure has a cross-sectional shape other than the frequency components f ₁ and f ₂ , it can be said that the transmitted sound pressure satisfies the reference sound pressure. If the depth X and the back height Y of the cross-sectional shape CS of the grill member G in the present embodiment are set to the values in the region displayed as “OK” in FIG. 7, the front grill FG of the horn HN is used. The transmitted sound pressure of the emitted sound satisfies the reference sound pressure.

As described above, according to the cross-sectional design device 10 of the present embodiment, it is possible to present a design space for the cross-sectional shape of the grill member G in which the transmitted sound pressure of the sound transmitted through the front grill FG satisfies the reference sound pressure. .. Therefore, the user can design the front grill FG in which the transmitted sound pressure satisfies the reference sound pressure by designing the grill member G so as to have the presented design space.

Further, according to the cross-section design device 10 of the present embodiment, drawing data or the like showing the detailed shape of the front grill FG is not used. Therefore, in the initial stage of product development before the detailed design of the front grill is decided, the cross-sectional shape of the grill member G is such that the transmitted sound pressure of the sound transmitted through the front grill FG satisfies the legal reference sound pressure. Can be predicted. For example, in the case of a technique for predicting sound pressure using drawing data after the detailed shape of a vehicle is determined, the time and cost required for development such as making design changes when the prediction result is inappropriate are required. There was a risk of increase. On the other hand, according to the cross-sectional design device 10 of the present embodiment, as described above, in the initial stage of product development, the cross-sectional shape of the grill member G is predicted so that the transmitted sound pressure satisfies the legal reference sound pressure. Therefore, it is possible to suppress an increase in time and cost required for development such as design changes.

Further, since the cross-sectional design device 10 includes the image information generation unit 114 and the display unit 170, a design space having a cross-sectional shape that satisfies the reference sound pressure can be illustrated. Therefore, since the design space of the cross-sectional shape can be easily visually recognized by the user, it can be easily used for the detailed design of the cross-sectional shape, and the convenience of the user can be improved.

Further, since the cross-sectional design device 10 of the present embodiment includes the constraint condition acquisition unit 113 and the variable Z is fixed, the design space to be output for the cross-sectional shape defined by using the three-dimensional variable is It is two-dimensional. As a result, the user can easily use the diagram showing the design space, and the convenience of the user can be improved.

<Second Embodiment>
FIG. 8 is a block diagram functionally showing the configuration of the cross-sectional design device 10A of the second embodiment. The cross-section design device 10A of the present embodiment differs from the cross-section design device 10 of the first embodiment in that it includes a regression model generation unit 115. Regarding the cross-section design device 10A of the present embodiment, the same configuration as that of the first embodiment is designated by the same reference numerals as those of the first embodiment, and the preceding description is referred to.

FIG. 9 is a flowchart showing the flow of the regression model generation process in the regression model generation unit 115. FIG. 10 is an explanatory diagram for explaining a numerical calculation model for generating the regression model 122. FIG. 11 is a diagram showing the frequency characteristics of the transmitted sound pressure.

In step T104, the regression model generation unit 115 generates a numerical calculation model. As shown in FIG. 10, the distance L1 from the sound input position IP to the front surface of the grill member G, the distance L2 from the front surface of the grill member G to the observation point OP of the transmitted sound pressure, and the grill member G and the grill member G. The distance H in the height direction between them, the number of grill members G, and the like are received via the input I / F unit 140 to generate a numerical calculation model. The position of the observation point OP of the transmitted sound pressure can be appropriately set, but it is preferable to set the position away from the reflection position of the external sound field.

In step T106, the regression model generation unit 115 generates a frequency database which is a database regarding "frequency at which the transmitted sound pressure does not satisfy the reference sound pressure" with respect to the "variable of the cross-sectional shape". In the frequency database, frequencies that do not satisfy the reference sound pressure corresponding to the variables X, Y, and Z that define the cross-sectional shape CS (hereinafter, also referred to as “reference sound pressure unachieved frequency”) are described. Specifically, the regression model generation unit 115 defines the variables X, Y, and Z, uses the finite element method, and uses the following (Equation 1) to define the variables X, Y, and Z. The transmitted sound pressure of the sound radiated from the openings S1 to S4 is calculated through the front grill FG provided with the grill member G having a cross-sectional shape. By converting the calculated transmitted sound pressure into a sound pressure level, the frequency characteristic of the transmitted sound pressure (sound pressure level) as shown in FIG. 11 can be obtained. The regression model generation unit 115 analyzes the frequency characteristics of the transmitted sound pressure and acquires the reference sound pressure unachieved frequency f (X, Y, Z). In FIG. 11, the range of frequencies where the reference sound pressure is not reached is shown with diagonal hatching. The regression model generation unit 115 generates a frequency database by changing the variables X, Y, and Z and repeating the calculation of the transmitted sound pressure. The calculation of transmitted sound pressure using the finite element method is described in M.J. Crocker, Handbook of acoustics, John Wiley & Sons, 1998. (Chapter 149-156, ACOUSTIC MODELING: FINITE ELEMENT METHOD chapter). Can be used.

p = c ² ∇ ² p ・ ・ ・ (Equation 1)
Here, p is the sound pressure [Pa], c is the sound velocity [km / h], and the sound velocity c is obtained by the following (Equation 2).
c = (K / ρ) ^1/2 ... (Equation 2)
Here, K is the bulk modulus [N / m ² ], and ρ is the density [kg / m ³ ].

The sound radiated through the front grill FG includes a sound propagating through air and a sound propagating through the front grill FG, but the sound propagating through the front grill FG is minute. Therefore, in the present embodiment, K and As ρ, the volume elastic modulus of air and the density of air are used.

In step T108, the regression model generation unit 115 uses the frequency database generated in step T106 to generate a regression model 122 that predicts the reference sound pressure unreached frequency from the variables X, Y, and Z.

According to the cross-section design device 10A of the present embodiment, the regression model 122 can be generated by the cross-section design device 10A. Therefore, when the regression model is generated, for example, the shape of the grill member G, the shapes of the openings S1 to S4, and the like. The user can set the conditions in detail. Therefore, cross-section information can be generated using a more appropriate regression model 122. As a result, the accuracy of the cross-sectional information can be improved.

<Modified example of this embodiment>
The present invention is not limited to the above embodiment, and can be carried out in various embodiments without departing from the gist thereof, and for example, the following modifications are also possible.

-In the above embodiment, the front grill FG of the vehicle is exemplified as the shield, and the horn HN of the vehicle is exemplified as the sound source, but the shield and the sound source are not limited to the above embodiment. For example, it is a shield that shields sound emitted from a sound source arranged inside an aircraft, a train, a ship, a building, an air conditioner, or the like, and can be applied to a shield having an opening. The sound source can also be applied to a sound source other than the horn, depending on the purpose. For example, it is possible to present a design space in which the cross-sectional shape of the louver of the air conditioner outlet is such that the sound emitted from the outlet is smaller than the target sound pressure level.

-In the above embodiment, the statutory reference sound pressure is exemplified as the target sound pressure, but the target sound pressure is not limited to the above embodiment. For example, based on the statutory reference sound pressure, the level may be set to be stricter than the statutory reference sound pressure. Further, although the example in which the lower limit value is set as the target sound pressure is shown, the upper limit value may be set. For example, when the cross-sectional shape of the louver of the air conditioner outlet is designed for the purpose of improving quietness, it is preferable to set an upper limit value as a target sound pressure. Further, as the target sound pressure, the upper and lower limit values may be set such that the first reference value or more and the second reference value or less.

-In the above embodiment, three variables X, Y, and Z are used as variables defining the cross-sectional shape CS, but the number of variables may be two or more. More complex cross-sectional shapes can also be defined using four or more variables.

-In the above embodiment, it is not necessary to include at least one of the constraint condition acquisition unit 113, the image information generation unit 114, and the display unit 170. Even in this way, it is possible to generate cross-sectional information indicating the design space of the cross-sectional shape of the shield whose transmitted sound pressure satisfies the target sound pressure. In addition, the resources of the cross-section design device 10 can be reduced, which can contribute to the miniaturization and cost reduction of the cross-section design device 10.

A printing device such as a printer may be connected to the output I / F unit 150 to print an image based on the cross-sectional information on a medium such as paper.

-In the above embodiment, an example of displaying the cross-sectional information as a graph (figure) is shown, but the range of values that the variables X and Y can take may be displayed in the form of a list or a table.

-In the above embodiment, the constraint by the design is exemplified as the constraint condition, but the constraint condition is not limited to the above embodiment. For example, variables can be fixed due to various restrictions such as design space and safety.

In the above embodiment, an example is shown in which the front grill FG is provided with three plate-shaped grill members G and four slit-shaped openings S are formed. However, the shape of the front grill FG is the same as that of the above embodiment. Not limited. The front grill FG may be provided with one grill member G, or may be provided with four or more grill members G. Further, for example, the front grill FG may be formed of a perforated plate (for example, punching metal or the like) having a plurality of holes formed therein.

Although this embodiment has been described above based on the embodiments and modifications, the embodiments described above are for facilitating the understanding of the present embodiment and do not limit the present embodiment. This aspect may be modified or improved without departing from its spirit and claims, and this aspect includes its equivalent. Further, if the technical feature is not described as essential in the present specification, it may be deleted as appropriate.

10, 10A ... Cross-section design device 110 ... CPU
111 ... Cross section information generation unit 112 ... Main frequency component acquisition unit 113 ... Constraint condition acquisition unit 114 ... Image information generation unit 115 ... Regression model generation unit 120 ... Storage unit 122 ... Regression model 124 ... Program 130 ... RAM
140 ... Input I / F section 150 ... Output I / F section 160 ... Operation section 170 ... Display section CS ... Cross-sectional shape FG ... Front grill FS ... Frequency spectrum G, G1, G2, G3 ... Grill members HN, HN1, HN2 ... Horn IMG ... Cross-section information image IP ... Input position OP ... Observation points S1, S2, S3, S4 ... Opening

Claims (9)

A cross-sectional design device for designing the cross-sectional shape of a shield.
The shield shields the sound emitted from the sound source, and has an opening through which the sound can be transmitted.
The cross-section design device
A regression model is stored in which a plurality of variables defining the cross-sectional shape are input, and a frequency at which the transmitted sound pressure of the sound emitted from the opening through the shield does not satisfy the target sound pressure is output. Memory and
A main frequency component acquisition unit that acquires the main frequency component of the sound source, and
Using the main frequency component and the regression model, a cross-sectional information generation unit that generates cross-sectional information indicating a design space of a cross-sectional shape of the shield in which the transmitted sound pressure satisfies the target sound pressure.
A cross-section design device. The cross-section design device according to claim 1.
moreover,
It includes a regression model generation unit that generates the regression model using the plurality of variables and the frequency characteristics of the transmitted sound pressure corresponding to the plurality of variables.
Cross-section design device. The cross-section design apparatus according to any one of claims 1 and 2.
moreover,
A constraint condition acquisition unit for acquiring a constraint condition that constrains the cross-sectional shape of the shield is provided.
The cross-section information generation unit is
Further, the constraint condition is used to generate the cross-sectional information.
Cross-section design device. The cross-section design apparatus according to any one of claims 1 to 3.
moreover,
It is provided with an image information generation unit that generates image information indicating a cross-sectional information image including a figure corresponding to the cross-sectional information.
Cross-section design device. The cross-section design apparatus according to claim 4.
moreover,
Equipped with a display
The display unit is
The cross-sectional information image is displayed based on the image information.
Cross-section design device. The cross-section design apparatus according to any one of claims 1 to 5.
The shield is a front grill
The sound source is a vehicle horn.
Cross-section design device. It is a method of designing the cross-sectional shape of a shield.
The shield shields the sound emitted from the sound source, and has an opening through which the sound can be transmitted.
The main frequency component acquisition process for acquiring the main frequency component of the sound source, and
A regression model in which a plurality of variables defining the cross-sectional shape are input and a frequency at which the transmitted sound pressure of the sound emitted from the opening through the shield does not satisfy the target sound pressure is output, and the main frequency. A cross-sectional information generation step of generating cross-sectional information indicating a design space of a cross-sectional shape of the shield in which the transmitted sound pressure satisfies the target sound pressure by using the components.
A cross-section design method. A computer program for designing the cross-sectional shape of a shield,
The shield shields the sound emitted from the sound source, and has an opening through which the sound can be transmitted.
The computer program is
The function to acquire the main frequency component of the sound source and
A regression model in which a plurality of variables defining the cross-sectional shape are input and a frequency at which the transmitted sound pressure of the sound emitted from the opening through the shield does not satisfy the target sound pressure is output, and the main frequency. Using the components, the computer is made to execute a function of generating cross-sectional information indicating a design space of the cross-sectional shape of the shield in which the transmitted sound pressure satisfies the target sound pressure.
Computer program. It ’s a storage medium,
Store the computer program according to claim 8,
Storage medium.

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