JPH09134119A - Urban area model making device for wind tunnel test - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of reproducing an urban area model easily and in a short term without needs for special and technological skill in making the urban area model. SOLUTION: This is a device to make an urban area model used for a wind tunnel test on a table 1, being provided with a layer 2' where many needle-shape members 2 closely queue up along the perpendicular direction in a horizontal plane under table 1, installing under this layer 2' a dot machine 6 set in traverse device 4, and plane information on the urban area to be reproduced as the urban area model and height information corresponding to this plane information are inputted to a computer 5 beforehand. And based on the plane information, the dot machine 3, moving in the direction of XY by a driving traverse device 4, projects the needle-shape member 3' on the table 1 by the unit of a specified small number of the member only by the height based on the height information via the vertically movable member 3', thus, the ruggedness corresponding to the urban area model is reproduced on the table 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for creating an urban model for a wind tunnel experiment, and more particularly to an apparatus for creating an urban model used for a wind tunnel experiment which is a means for examining building wind and wind resistant structure in architectural engineering.

[0002]

2. Description of the Related Art Conventionally, when a high-rise building is mainly constructed, a city model is placed on a turntable with a diameter of about 2 m in order to study wind damage such as building wind and the wind resistant structure of the building. The wind tunnel experiment is carried out.

Further, the city model has map information (scale of 1/2).
500), it is the current state that it is created by hand using mainly wood utilizing aerial photographs and building information (height, etc.).

[0004]

However, the range of the city area reproduced as a model is wide with a radius of 300 to 500 m centering on the building to be constructed, and there are various buildings ranging from houses to middle and high-rise buildings in this city area.

Therefore, it is difficult for a person who conducts a wind tunnel experiment himself to make an urban model, and it is necessary to rely on outsourcing, and the production period is 1-2. There was a problem that it lasted for a month and a long time.

The present invention has been made in view of the above problems, and an object thereof is to reproduce a city model easily and in a short period of time without requiring special skill or skill to create a city model. An object is to provide an urban model making device for wind tunnel experiments.

[0007]

An apparatus for creating a city model for a wind tunnel experiment according to the present invention is an apparatus for creating an city model used for a wind tunnel experiment on a table, and has a large number of needles under the table in the vertical direction. A layer in which the members are densely arranged in a horizontal plane is provided, and a dot machine set in a traverse device is installed below this layer, and the plane information of the urban area to be the urban model and height information corresponding to this plane information are provided in advance. Is input to the computer, and the traverse device is driven based on the plane information, so that the dot machine moves in the X-Y directions and the needle moves through the elevating member by a height corresponding to the height information. Characteristic members are projected on the table by a predetermined number of small units, so that the unevenness corresponding to the city model is reproduced on the table. To.

That is, in the present invention, attention is paid to the fact that the unevenness woven by buildings, streets, etc. in the reproduced urban model is practically used for the wind tunnel experiment, and the unevenness conventionally formed of wood or the like is closely packed. The projection height of a large number of arranged needle-shaped members on the table is reproduced by adjusting the projection height almost pinpoint.

Therefore, it is necessary to prevent the needle-like member once projected on the table from easily falling due to its own weight or the like. As a means for this, a part of the material of the table is made of foam polystyrene, hard rubber, or plywood. A sandwiched rubber or the like is used so that the table holds the needle-shaped members, or the table is provided with a large number of minute holes for raising each needle-shaped member. Examples thereof include those that slide only by the lifting force of the elevating member of the dot machine, the force of pushing down by the hand, etc., or that magnetize by energizing.

Incidentally, in the mode in which the layer of the needle-shaped member is provided under the table, the upper surface of the layer is in contact with the back surface of the table, and the upper end portion of each layer (each The upper end portion of the needle-shaped member is included in the inside of the table.

Further, in order to use it in a wind tunnel experiment, it is necessary to make the gap between the needle-like members projecting on the table and forming, for example, one building adjacent to each other smaller than the allowable range. The density (in the horizontal plane) of at least 100 needles / cm ² and the cross section of one needle is 1
It is less than or equal to mm ² .

The needle-shaped member is preferably made of metal, but may be hard plastic.

The dot machine used as a means for pushing up the needle-shaped member has the same function as that used in the printing device of the dot printer, and the traverse device is operated by the numerical control based on the numerical data input by the computer. It moves in the X-Y direction in the horizontal plane via the and the lifting member integrally provided is moved in the Z (height) direction.

Further, the horizontal cross section (at the upper end portion) of the elevating member defines a unit of a predetermined small number of needle-shaped members that are pushed up by one elevating operation, and the desirable range is about 1 to 5 × 5. If it exceeds this range, there may be a problem in the accuracy of the urban model.

The elevating member is generally composed of a predetermined number (including one) of dot needles (pins) or a group of dot needles, but may be a columnar member.

The traverse device for moving the dot machine in the XY directions is used for general industry, and for example, the moving part set on the guide rail is of a predetermined type by a screw ball type or a rack-pinion type. It is a structure to move to the position.

The plane information and height information corresponding to the plane information input to the computer are numerical data of three-dimensional spatial coordinates that define the uneven contour of an urban area, and the plane information is a map or aerial photograph. The height information can be obtained from the aerial photograph that looks at the city and the field confirmation.

In the present invention, the needle-shaped member once projected onto the table can be pushed down with a hand or the like to partially correct it, or a separate urban model can be newly reproduced.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an explanatory view schematically showing an apparatus for creating a city for a wind tunnel experiment according to the present invention.

This device is a layer 2'consisting of a turntable 1 (shown broken) used as it is for a wind tunnel experiment and a metal rod 2 as a needle-like member provided under the turntable 1.
A traverse device 4 provided below the layer 2 ′, a dot machine 3 set in the traverse device 4, and a control computer 9 connected to the traverse device 4 via a cable 9.

The table 1 is made of wood and the metal rod 2 does not easily fall under its own weight.

Further, the metal rod 2 having a length of 60 cm is used, and the metal rods 2 along the vertical direction are densely (100 / cm ² ) arranged vertically and horizontally in a horizontal plane to form a layer 2 ', and an upper end portion of the layer 2'. Tried to get into Table 1. The length of the metal rod 2 is different for each wind tunnel experiment.

The traverse device 4 has an X axis 4'movable in the Y direction between the Y axes 4 "on both the left and right sides.
The dot machine 3 is set so as to be movable in the X direction on the X axis 4 '.

The dot machine 3 is provided with a pin group 3'as an elevating member, and the pin group 3'forms a cross section corresponding to a metal rod (a unit of a predetermined small number).

On the other hand, the computer 5 inputs the map information 10 as the plane information of the city to be reproduced as a model through the scanner 6 or the CD 7 or the FD 8, and at the same time, the height of the building or the inclination of the street as the information of the height of the city. Etc. are entered on the keyboard.

Next, when the traverse device 4 is driven based on the numerical data output from the computer 5, the X axis 4'moves intermittently in the Y direction, and when the X axis 4'is stopped, the dot machine 3 moves in the X direction. While moving to, the metal rod 4 ′ is projected on the table 1 in a pinpoint manner through the pin group 3 ′ by the height based on the numerical data. As a result, the unevenness corresponding to the city model can be reproduced on the table 1.

If correction is necessary, the metal rod 2'of that portion can be pushed down by hand to return it to the initial state, and new numerical data can be input to the computer 5 to promptly deal with it.

[0029]

As described above, according to the present invention, since the city model (concavo-convex) used in the wind tunnel experiment can be reproduced by computer control, no one needs special skill or skill as in the conventional case. However, it can be created, and the creation period can be greatly shortened.

Further, it is possible to promptly deal with a change in the condition of the model.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an apparatus for creating an urban model for a wind tunnel experiment according to the present invention.

[Explanation of symbols]

 1 Turntable 2 Metal Rod 2'Layer 3 Dot Machine 3'Pin Group 4 Traverse Device 5 Control Computer

Claims (1)

[Claims] 1. An apparatus for creating a city model used in a wind tunnel experiment on a table, wherein a layer in which a large number of needle-like members along the vertical direction are densely arranged in a horizontal plane is provided under the table,
A dot machine set in a traverse device is installed below this layer, and the plane information of the city area to be reproduced as the city area model and height information corresponding to this plane information are input to the computer in advance, and based on the plane information. By driving the traverse device, while moving the dot machine in the X-Y directions, the needle-shaped member is moved in units of a predetermined small number on the table through the elevating member by a height based on the height information. An apparatus for producing a city model for a wind tunnel, wherein the unevenness corresponding to the city model is reproduced on the table.