JP2019178870A - Model molding device for wind tunnel experiment - Google Patents

Abstract

To provide a model molding device for a wind tunnel experiment capable of easily forming a reduced model of a building and surrounding landform used for the wind tunnel experiment even with a simple structure, and creating various experimental environments while changing the shape of the model.SOLUTION: A model molding device for a wind tunnel experiment comprises: a turntable 80 supported on a base 70 so as to be rotatable in the horizontal direction; a support frame 90 supported so as to be movable up and down on the turntable 80; a lifting device 100 for lifting and lowering the support frame 90; and a model body 20 provided on an upper part of the support frame 90. The model body 20 includes: a plurality of insertion holes 40 provided in a plate member 30; a plurality of rod-like members 10 inserted through the insertion holes 40 and supported so as to be movable in the vertical direction; a holding member (O-ring) 50 provided on an inner wall of the insertion hole 40 and holding the rod-like member 10 at a desired height position; and a moving device 60 for individually moving each rod-like member 10 to a desired height position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a model forming apparatus for wind tunnel experiments, and more particularly to an apparatus capable of easily creating a model for wind tunnel experiments according to the surrounding conditions of a construction site where a wind tunnel experiment is performed. .

  When building a large-scale building, a wind tunnel experiment is generally performed in order to recognize in advance the effect on the surrounding environment when the building is built and take an appropriate action. In particular, when building high-rise buildings, it is necessary to consider the effects of building wind generation and sunshine conditions, the wind-resistant structure of the building itself, and the like. The model for the wind tunnel experiment needs to be created appropriately according to the actual surroundings of the construction site. However, if the entire manufacturing process is relied on manually, an efficient wind tunnel experiment cannot be performed. Therefore, various proposals have been conventionally made (see Patent Document 1 and Patent Document 2).

  The technique described in Patent Document 1 relates to an apparatus for creating an urban model used for a wind tunnel experiment on a table. In this wind tunnel experimental city model making apparatus, a layer in which a large number of needle-like members along the vertical direction are arranged closely in a horizontal plane is provided under a table, and a dot machine set in a traverse device is installed below this layer. Then, the plane information of the urban area to be reproduced in advance as an urban model and the height information corresponding to the plane information are input to the computer, and the traversing device is driven based on the plane information, so that the dot machine moves in the XY direction. While moving, the needle-like member is projected on the table by a predetermined small number of units through the lifting member by the height based on the height information. As a result, the unevenness corresponding to the city model can be reproduced on the table.

  The technique described in Patent Document 2 relates to a three-dimensional forming apparatus for creating a scale model of a building or the like. This three-dimensional forming apparatus is composed of a support body having a large number of insertion holes and a large number of rod-shaped bodies that are inserted through the insertion holes and are held at arbitrary heights. Moreover, the latching | locking part is provided in at least one of the penetration hole and the rod-shaped body. Then, a large number of rod-shaped bodies that can be moved independently are inserted into a large number of insertion holes formed in the support body, and a three-dimensional shape is formed by giving a height difference to the end surface of the rod-shaped body, and various models and A mold prototype is created.

JP-A-9-134119 JP-A 63-168678

  As described above, when a building such as a high-rise building is constructed, a wind tunnel experiment is generally performed by creating a reduced model of the building and the surrounding terrain. In order to form a model with a certain degree of detail, it is necessary to have an appropriate resolution. However, in order to form a model in the size of a wind tunnel model (a turntable of several meters, etc.) Etc. are required.

  By using the technique proposed in Patent Document 1, a model can be automatically formed from coordinates and height information stored in a computer. However, in this technique, a mechanism for holding the pushed-up bar has been proposed, but the device configuration and the control operation are complicated, so that further contrivance is required for actual use.

  Moreover, the technique described in Patent Document 2 requires manual operation of a large number of individual rods, and requires a great deal of labor to create a model. For this reason, it is extremely difficult to faithfully reproduce complex terrain and the like, and it is almost impossible to create various experimental environments while changing the shape of the model.

  The present invention has been proposed in view of the above-described circumstances, and it is possible to easily form a reduced model of a building and a surrounding terrain used for a wind tunnel experiment while having a simple structure. An object of the present invention is to provide a model forming apparatus for wind tunnel experiments that can create various experimental environments while changing.

  The model forming apparatus for wind tunnel experiment according to the present invention has the following features in order to achieve the above-described object. That is, the model forming apparatus for wind tunnel experiment according to the present invention includes a turntable supported to be horizontally rotatable on a base, a support frame supported to be movable up and down on the turntable, and raising and lowering the support frame. An elevating device and a model main body provided on the upper part of the support frame are provided.

  The model body is provided with a plurality of insertion holes provided in the plate-like member, a plurality of rod-like members that are inserted through the insertion holes and supported to be movable in the vertical direction, and provided on the inner wall of the insertion hole. Is provided with a holding member that holds the rod-shaped member at a desired height position, and a moving device that individually moves each rod-shaped member to the desired height position.

  In the above-described model forming apparatus for wind tunnel experiment, the rod-shaped member is provided at the lower part of the model part that protrudes upward from the insertion hole and the adjacent side surfaces are in close contact with each other, and is inserted into the insertion hole. The operation unit can be configured. And the outer diameter of the operation part is formed smaller than the outer diameter of a model part. The moving device pushes up the rod-shaped member and has a push-up rod whose upper end portion is a concave engagement surface, a push-up device that moves the push-up rod up and down, and the push-up device at the position of the rod-shaped member to be moved. A configuration including a traverse device to be moved is possible.

  Further, in the above-described model forming apparatus for wind tunnel experiment, it is possible to provide a configuration in which the lower end portion of the operation portion of the rod-like member is provided with an attracting portion made of a magnetic material and the upper end portion of the push-up rod is provided with an electromagnet. It is. In such a configuration, by exciting the electromagnet, the upper end portion of the push-up rod is attracted to the operation portion (adsorption portion) of the rod-shaped member, and the rod-shaped member can be moved to a desired height position. It becomes possible. In addition, a magnetic body means metals, such as iron which a magnet adsorb | sucks, for example. Further, in a state where the upper end portion of the push-up bar is attracted to the operation portion of the rod-shaped member, the rod-shaped member can be moved in any of the vertical directions.

  Further, in the above-described model forming apparatus for wind tunnel experiment, a storage device that stores shape data of a model formed by the model body, and a moving device is controlled based on the shape data stored in the storage device, and each rod-like member is desired. It is possible to adopt a configuration including a control device that is set at the height position.

  Moreover, in the model forming apparatus for wind tunnel experiment described above, the holding member is made of an O-ring having flexibility and elasticity, and the O-ring is fitted into a groove provided on the inner wall surface of the insertion hole. Is possible.

  According to the model forming apparatus for wind tunnel experiment according to the present invention, in order to form a model, the rod-shaped member is moved at a desired height position by the holding member while having a simple structure in which the rod-shaped member is moved in the vertical direction. Since it is securely held, it is possible to easily form a reduced model of the building and surrounding terrain used for the wind tunnel experiment. It is also possible to create a wide variety of experimental environments while changing the shape of the model.

Explanatory drawing which shows the whole structure of the model formation apparatus for wind tunnel experiments which concerns on embodiment of this invention. Explanatory drawing of the plate-shaped member and rod-shaped member which are used with the model formation apparatus for wind tunnel experiments which concerns on embodiment of this invention. Explanatory drawing of the rod-shaped member used with the model formation apparatus for wind tunnel experiments which concerns on embodiment of this invention. Explanatory drawing of the rod-shaped member and insertion hole which are used with the model formation apparatus for wind tunnel experiments which concerns on embodiment of this invention.

  Hereinafter, a model forming apparatus for wind tunnel experiment according to an embodiment of the present invention will be described with reference to the drawings. 1 to 4 illustrate a wind tunnel experimental model forming apparatus according to an embodiment of the present invention. FIG. 1 is an explanatory diagram of the overall configuration, FIGS. 2 and 3 are explanatory diagrams of a rod-shaped member, and FIG. It is explanatory drawing of a hole and a rod-shaped member. 2A shows a state in which the plate-like member and the rod-like member are viewed from the side surface, FIG. 2B shows a state in which the plate-like member and the rod-like member are viewed from the bottom surface, and FIG. (B) is a state in which the rod-shaped member is enlarged from the bottom surface, (a) is a state in which the insertion hole and the holding member are viewed from the top surface, and (b) is a side view of the insertion hole and the holding member. The state seen from.

<Outline of model forming apparatus for wind tunnel experiment>
The model forming apparatus 200 for wind tunnel experiment according to the embodiment of the present invention is characterized by a model main body 20 having a rod-shaped member 10 as a main component as shown in FIGS. The model body 20 includes a plurality of insertion holes 40 provided in the plate-like member 30, a plurality of rod-like members 10 that are inserted through the insertion holes 40 and supported so as to be movable in the vertical direction, and an inner wall of the insertion hole 40. A holding member 50 that is provided and holds the rod-shaped member 10 at a desired height position, and a moving device 60 that individually moves each rod-shaped member 10 to a desired height position are provided.

  Various devices are attached to the wind tunnel experiment model formed by the model body 20 for use in the wind tunnel experiment. The apparatus attached to the model main body 20 includes a turntable 80 that is supported on the base 70 so as to be rotatable in the horizontal direction, a support frame 90 that is supported so as to be movable up and down on the turntable 80, and a mechanism that raises and lowers the support frame 90. Elevating device 100.

<Turntable>
The turntable 80 is a device for rotating the wind tunnel experimental model to a desired rotational position. Although not shown, in the wind tunnel experiment, wind is blown against the model by generating an air flow using a blower, but in order to change the direction in which the wind is blown, the direction of the wind is more than moving the blower. However, the device configuration can be simplified by changing the position of the model. The turntable 80 is a device for this purpose, and includes a rotating substrate 81 provided on the base 70 and a table main body 83 placed on the rotating substrate 81 via a turning guide 82. The turntable 80 may be rotated manually, or a drive device (not shown) may be attached and rotated by the drive force of the drive device.

<Support frame / lifting device>
The support frame 90 is a frame that houses and supports the model main body 20 and its associated devices. In the present embodiment, the support frame 90 is formed of a bowl-like body with the plate-like member 30 attached to the upper surface. The apparatus accommodated and supported in the support frame 90 includes a plate-like member 30 having a plurality of insertion holes 40, a plurality of rod-like members 10 inserted through the respective insertion holes 40, and the rod-like members 10 at desired height positions. A holding member 50 to be held, and a moving device 60 for moving each rod-like member 10 individually to a desired height position.

  The elevating device 100 is a device for elevating and lowering the support frame 90, and in the present embodiment, is configured by a plurality of jacks installed between the turntable 80 and the support frame 90. The lifting device 100 is not limited to a jack and may be any device that can lift and lower the support frame 90.

<Model body>
As described above, the model body 20 includes a plurality of insertion holes 40 provided in the plate-like member 30, a plurality of rod-like members 10 that are inserted through the insertion holes 40 and supported so as to be movable in the vertical direction, and the insertion holes. The holding member 50 is provided on the inner wall of 40 and holds the rod-like member 10 at a desired height position, and a moving device 60 that individually moves each rod-like member 10 to the desired height position. The plate-like member 30 of the present embodiment has a disk shape, and the insertion hole 40 is formed in a donut shape avoiding the central portion. In the plate-shaped member 30 having such a shape, a model (not shown) of a building to be tested can be installed at the upper part of the center.

<Insertion hole>
The plate-like member 30 is provided with a plurality of insertion holes 40. The insertion hole 40 is a hole for defining the vertical position of the rod-shaped member 10 including the model part 11 and the operation part 12, and the operation part 12 positioned below the model part 11 is inserted through the insertion hole 40. ing. In the present embodiment, since the cross section of the operation portion 12 is circular, the cross section of the insertion hole 40 is also circular, and the inner diameter of the insertion hole 40 is set larger than the outer diameter of the operation portion 12. In addition, the cross-sectional shape of the insertion hole 40 is not limited to a circle, and can be changed as appropriate according to the shape of the rod-shaped member 10 (operation unit 12).

<Bar-shaped member>
The rod-shaped member 10 is a main member for creating a wind tunnel experiment model in the model body 20. The rod-shaped member 10 protrudes upward from the insertion hole 40 and the side surface adjacent to each other is in close contact with each other, and an operation unit provided at the lower part of the model unit 11 and inserted through the insertion hole 40. Twelve. In the present embodiment, the model section 11 has a square cross section, and the operation section 12 has a circular cross section. In addition, the cross section of the model part 11 is not limited to a square, and may be any shape such as a regular hexagon or a regular triangle as long as adjacent side surfaces are in close contact with each other. Similarly, the cross section of the operation portion 12 is preferably circular in that it is inserted into the insertion hole 40 and is held by an O-ring that is the holding member 50, but may have other shapes.

  Further, the outer diameter of the operation portion 12 is formed smaller than the outer diameter of the model portion 11. That is, at the upper part of the insertion hole 40, the side surfaces of the projecting model portions 11 are in close contact with each other, whereby a wind tunnel experimental model that does not easily deform can be created. Since the adjacent operation portions 12 are separated from each other, they do not interfere with each other, and the target bar-shaped member 10 can be operated reliably.

  Further, an adsorption portion (not shown) made of a magnetic material may be provided at the lower end portion of the operation portion 12 of the rod-shaped member 10. The magnetic body is a metal to which a magnet such as iron is adsorbed. An adsorbing portion is provided at the lower end portion of the operation portion 12, and an electromagnet (not shown) is attached to the upper end portion of the push-up bar 61. Then, the electromagnet is energized and excited so that the upper end portion of the push-up rod 61 is attracted to the operation portion 12 of the rod-like member 10, so that the rod-like member 10 can be reliably moved to a desired height position. it can. Further, in a state where the upper end portion of the push-up rod 61 is attracted to the operation portion 12 of the rod-shaped member 10, the rod-shaped member 10 can be moved in either the vertical direction. When the energization of the electromagnet is stopped, the adsorption between the upper end portion of the push-up rod 61 and the operation portion 12 of the rod-shaped member 10 is also released, and the vertical position of the rod-shaped member 10 is determined.

<Holding member>
The holding member 50 is a member that is provided on the inner wall of the insertion hole 40 and holds the rod-shaped member 10 at a desired height position. The holding member 50 according to the present embodiment includes an O-ring having flexibility and elasticity, and the O-ring is fitted in a groove provided on the inner wall surface of the insertion hole 40. That is, since the outer peripheral surface of the operation unit 12 inserted into the insertion hole 40 is pressed against the O-ring, the operation unit 12 can be held at a desired vertical position.

  Further, the frictional force can be adjusted by changing the width and depth of the groove portion into which the O-ring is fitted, and an appropriate frictional force is applied according to the material, size, weight, etc. of the rod-shaped member 10. can do. The O-ring can be formed from, for example, synthetic rubber or synthetic resin.

<Moving device>
The moving device 60 is a device for individually moving each rod-shaped member 10 to a desired height position. The moving device 60 presses against the lower end surface of the operation portion 12 of each bar-shaped member 10 to push up each bar-shaped member 10, a push-up device 62 that moves the push-up bar 61 up and down, and the push-up device And a traverse device 63 that moves 62 to the position of the rod-shaped member 10 to be moved. Moreover, as shown to Fig.3 (a), the upper end surface of the raising stick 61 is the concave engagement surface 61a.

  Then, when the upper end portion of the push-up bar 61 comes into contact with the lower end surface of the operation portion 12 and pushes up the operation portion 12, the projection amount of the model portion 11 (the vertical position of the rod-shaped member 10) can be defined. At this time, the center of the lower end portion of the operation portion 12 faces the center of the insertion hole 40 due to the bending of the rod-like member 10 due to the clearance between the insertion hole 40 and the operation portion 12 and the warp of the operation portion 12. It is not limited to this, and there may be some deviation in the horizontal direction. Even in such a case, since the upper end portion of the push-up bar 61 is a concave engagement surface 61a, the upper end surface of the push-up bar 61 is within a range in which the lower end portion of the target operation unit 12 is displaced. If is located, the said operation part 12 can be pushed up reliably.

  The push-up device 62 is constituted by an actuator having a cylinder and a piston rod. The actuator including the cylinder and the piston rod may have any structure such as an electric type, a hydraulic type, a pneumatic type, and a magnetic type. Moreover, by installing a plurality of push-up devices 62 (push-up bars 61), it is possible to simultaneously move a plurality of rod-shaped members 10 to a desired height position. The number of push-up devices 62 may be set as appropriate according to the shape and size of the wind tunnel experiment model forming device 200, the number of rod-like members 10, and the like.

  The traverse device 63 is a device for moving the push-up device 62 in the X-axis direction and the Y-axis direction. Note that the X-axis direction and the Y-axis direction are directions orthogonal to each other on a horizontal plane. The traverse device 63 includes, for example, rotatable worms 64a and 64b installed in the X-axis direction and the Y-axis direction, and a worm wheel (not shown) that is supported by the support frame 90 and meshes with the worms 64a and 64b. . An X-axis motor 65a and a Y-axis motor 65b are connected to the worms 64a and 64b in the X-axis direction and the Y-axis direction, respectively, so that the worms 64a and 64b can be rotated. The configuration of the traverse device 63 is not limited to that described above, and any configuration may be used as long as the model body 20 can be moved to a desired position.

  When the worms 64a and 64b are rotated by the X-axis motor 65a and the Y-axis motor 65b, the push-up device 62 can be moved to desired positions in the X-axis direction and the Y-axis direction. Then, by driving the push-up device 62 in a state where the push-up device 62 is moved to a desired position, the rod-shaped member 10 (model unit 11 and operation unit 12) can be moved to a desired vertical position.

<Storage device / control device>
The storage device 110 is a device for storing shape data of a model formed by the model main body 20 and includes, for example, a storage medium such as an HDD, an SDD, a DVD, and incidental equipment. The control device 120 is a device for controlling the moving device 60 based on the shape data stored in the storage device 110 and setting each bar-shaped member 10 at a desired height position. The control device 120 is configured by a computer, an accessory device, and software (program) installed in the computer. When the software is read into the computer, the software and hardware resources cooperate to function. Demonstrate.

<Modeling>
In the present embodiment, since the control device 120 is provided, the model can be formed under the control of the control device 120. That is, the control device 120 controls the moving device 60 based on the shape data stored in the storage device 110 and sets each rod-like member 10 at a desired height position, thereby forming a desired shape model. The shape data stored in the storage device 110 is, for example, GIS (Geographic Information System) data or point cloud data of the ground or a building group.

  In addition, when an attracting portion is provided at the lower end portion of the operation portion 12 and an electromagnet is provided at the upper end portion of the push-up bar 61, the rod-shaped member 10 once pushed up can be pulled down by the attracting force of the electromagnet. Therefore, not only can the model shape be finely adjusted, but the model shape can be changed as the experiment progresses.

<Specific numerical values of each member>
Specific numerical values of each member constituting the model forming apparatus 200 for wind tunnel experiment according to the present embodiment will be described. In addition, the numerical value shown below is an example and this invention is not limited to these numerical values. The thickness of the plate-like member 30 constituting the model main body 20 is about 50 mm, and a plurality of insertion holes 40 are provided in the plate-like member 30. The inner diameter of the insertion hole 40 is about 3.1 mm, and the adjacent insertion holes 40 are separated by about 2.9 mm. The inner diameter of the O-ring attached to the insertion hole 40 is about 3.0 mm, the depth of the groove into which the O-ring is fitted is about 1.5 mm, and the width of the groove is about 0.7 mm.

  Moreover, the operation part 12 which comprises the rod-shaped member 10 has a round bar shape, and the model part 11 has a square bar shape. The operation unit 12 has an outer diameter of about 3.0 mm and a length of about 200 mm. The model part 11 is a square bar of about 6.0 mm × 6.0 mm, and the length is about 160 mm. The wind tunnel experiment model formed by the wind tunnel experiment model forming apparatus 200 is, for example, about 1/400 to 1/500 of the actual size.

DESCRIPTION OF SYMBOLS 10 Bar-shaped member 11 Model part 12 Operation part 20 Model main body 30 Plate-shaped member 40 Insertion hole 50 Holding member 60 Moving device 61 Push-up bar 61a Engagement surface 62 Push-up device 63 Traverse device 64a Worm (X axis)
64b Worm (Y axis)
65a X-axis motor 65b Y-axis motor 70 Base 80 Turntable 81 Rotating substrate 82 Turning guide 83 Table body 90 Support frame 100 Lifting device 110 Storage device 120 Control device 200 Model forming device for wind tunnel experiment

Claims (5)

A turntable supported so as to be horizontally rotatable on the base;
A support frame supported so as to be movable up and down on the turntable;
A lifting device for lifting and lowering the support frame;
A model body provided on the upper part of the support frame,
The model body is
A plurality of insertion holes provided in the plate member;
A plurality of rod-shaped members that are inserted through the insertion holes and supported so as to be movable in the vertical direction;
A holding member that is provided on an inner wall of the insertion hole and holds the rod-shaped member at a desired height position;
A moving device that individually moves each rod-shaped member to a desired height position;
A model forming apparatus for wind tunnel experiments characterized by comprising: The rod-shaped member protrudes upward from the insertion hole and has a model part in which adjacent side surfaces are in close contact with each other, and an operation part provided at a lower part of the model part and inserted through the insertion hole. The outer diameter of the operation part is formed smaller than the outer diameter of the model part,
The moving device presses against the lower end portion of the operation portion of each bar-like member to push up each bar-like member, pushes up the upper end portion into a concave engagement surface, and pushes up to move the push-up rod up and down A traverse device that moves the device and the push-up device to the position of the rod-shaped member to be moved;
The model forming apparatus for wind tunnel experiment according to claim 1, comprising: The lower end portion of the operation portion of the rod-shaped member is provided with an adsorption portion made of a magnetic material,
The upper end of the push-up bar is equipped with an electromagnet,
By exciting the electromagnet, the upper end of the push-up bar is attracted to the operation part of the bar-shaped member, and the bar-shaped member is moved to a desired height position.
The model forming apparatus for wind tunnel experiment according to claim 2. A storage device for storing shape data of a model formed by the model body;
A control device that controls the moving device based on the shape data stored in the storage device and sets each rod-like member at a desired height position;
The model forming apparatus for wind tunnel experiment according to any one of claims 1 to 3. The holding member is made of an O-ring having flexibility and elasticity, and the O-ring is fitted in a groove provided on the inner wall surface of the insertion hole.
The model formation apparatus for wind tunnel experiments of any one of Claims 1-4 characterized by the above-mentioned.

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