A wind tunnel test device for simulating wind pressure inside and outside actual open-hole low-rise buildings

Abstract

The present application relates to a kind of wind tunnel test device for simulating actual open low-rise building internal and external wind pressure, roof is detachably arranged in the top of rotating disc, one side is equipped with door and window, top is herringbone and both sides are equipped with multiple roof modules;Roof module includes mounting plate and multiple tiles, rectangular hole corresponding with tile is opened in the top of mounting plate, both sides of tile are equipped with electromagnet strip for fixing tile in mounting plate;Turnover mechanism, mounting plate is fixed on driving piece by clamping piece, and then driving piece drives mounting plate to overturn to open roof module;Opening and closing component, adjust lifting piece to move to the lower side of corresponding tile for opening and closing operation by adjusting piece;Fixed rod is equipped with launcher for simulating projectile damage;Control piece is used to control the random movement of lifting piece;Solve the problem that existing wind tunnel test device can usually only simulate single wind pressure effect or simple opening condition, it is difficult to fully simulate the influence of projectile and wind pressure coupling effect on open building under actual working condition.

Description

Technical Field

[0001] This invention belongs to the field of wind tunnel testing technology, and relates to a wind tunnel testing device for simulating the wind pressure inside and outside an actual low-rise building with openings, and more particularly to a wind tunnel testing device for simulating the wind pressure inside and outside an actual low-rise building with openings under the coupled action of projectiles and wind pressure. Background Technology

[0002] In the design and evaluation of low-rise buildings, wind pressure is a crucial factor that cannot be ignored. Wind pressure not only affects the overall structural safety of the building but also directly impacts interior comfort. Particularly for buildings with windows, doors, or other openings, the distribution and variation of wind pressure can create pressure concentrations at these openings, threatening the building's safety. Furthermore, changes in wind pressure can lead to uneven airflow within the building, affecting occupant comfort. Therefore, accurately assessing the impact of wind pressure on low-rise buildings is essential for ensuring both building safety and comfort.

[0003] Besides the influence of wind pressure itself, the impact of projectiles (such as debris in a storm) on building surfaces is also an important consideration. The coupling effect of these projectiles and wind pressure can generate additional pressure on building surfaces, especially at openings, where this pressure may be more concentrated, thus increasing the risk of structural damage. Under extreme weather conditions, such as hurricanes or tornadoes, the coupling effect of projectile impact and wind pressure can cause severe damage to low-rise buildings. Therefore, designing a wind tunnel testing facility that can effectively simulate this coupling effect is of great significance for evaluating and improving the wind resistance and structural safety of low-rise buildings.

[0004] Existing wind tunnel testing facilities typically only simulate single wind pressure effects or simple opening scenarios, making it difficult to comprehensively simulate the combined effects of projectiles and wind pressure on buildings with openings under real-world conditions. This limitation restricts the accurate assessment of building structure performance under complex wind pressure conditions. Therefore, there is an urgent need to develop a new wind tunnel testing facility capable of simulating complex conditions such as arbitrary openings in roofs, walls, and simultaneous openings in both walls and roofs. Furthermore, this facility should also be able to simulate the impact of projectiles on building surfaces and the coupling effect of this impact with wind pressure, thereby more accurately assessing the internal and external wind pressure distribution of low-rise buildings under the combined effects of wind pressure and projectiles. The development of such a facility will provide more scientific and accurate data support for the design and evaluation of low-rise buildings, contributing to improved building safety and comfort. Summary of the Invention

[0005] In view of this, in order to solve the problem that existing wind tunnel testing devices can usually only simulate a single wind pressure effect or a simple opening situation, and are difficult to comprehensively simulate the impact of the coupling effect of flying objects and wind pressure on the opening building under actual working conditions, resulting in poor simulation effect, the present invention provides a wind tunnel testing device for simulating the wind pressure inside and outside the actual opening low building.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A wind tunnel testing apparatus for simulating wind pressure inside and outside actual low-rise buildings with openings, comprising:

[0008] A fixed disk, which has a rotating disk rotatably mounted inside it;

[0009] The roof is detachably mounted on top of the rotating disc, with a door and window on one side, a gable-shaped top with multiple roof modules on both sides, and a spine fixed on top to secure the roof modules.

[0010] The roof module includes a mounting plate and multiple tiles. The top of the mounting plate has rectangular holes corresponding to the tiles. The tiles are hinged in the rectangular holes. Electromagnetic strips are provided on both sides of the tiles to fix them in the mounting plate.

[0011] The flipping mechanism is located on both sides of the roof and includes a drive component and a snap-fit ​​component. The mounting plate is fixed to the drive component by the snap-fit ​​component, and then the drive component drives the mounting plate to flip to open the roof module.

[0012] The opening and closing mechanism is located inside the roof and includes an adjusting component and a lifting component. The adjusting component is used to adjust the lifting component to move it under the corresponding tile to perform the opening and closing operation.

[0013] A fixed rod is located below the air source, and a launcher simulating the destruction of projectiles is installed on it;

[0014] The control unit, located on the rotating disk, is used to control the random movement of the lifting component.

[0015] As a further improvement to the above technical solution:

[0016] The drive unit includes: two rotating seats, which are bolted to one side of the roof; a drive rod, which is rotatably mounted between the two rotating seats via a bearing; a first motor, which is bolted to the side of one of the rotating seats, and whose output end is fixedly connected to the drive rod; and a first connecting ring, which is welded to the bottom of the mounting plate and rotatably sleeved on the drive rod.

[0017] The snap-fit ​​component includes: a first screw, which is rotatably mounted between two rotating seats via bearings; a second motor, which is bolted to the side of a rotating seat, with its output end fixedly connected to the first screw; a nut block, which is threaded onto the outer wall of the first screw and slidably mounted on the side of the roof via a guide rail; a semi-circular ring, which is connected to the top of the nut block via a connecting post; a second connecting ring, which is slidably mounted inside the semi-circular ring via two annular slide bars and mounted on the first connecting ring; and a key pin, which is welded to the inner wall of the second connecting ring and inserted into the rectangular opening of the first connecting ring and the drive rod.

[0018] The adjusting components include: a mounting frame, which is bolted to the house; a second screw, which is rotatably mounted in the mounting frame via a bearing; a third motor, which is bolted to the side of the mounting frame, and whose output end is welded to the second screw; and a moving bar, which is slidably mounted in the mounting frame via a guide rail and threaded onto the second screw.

[0019] It also includes: a third screw, which is rotatably mounted inside the moving bar via a bearing; a fourth motor, which is bolted to the moving bar; and a moving block, which is slidably mounted inside the moving bar via a guide rail and threaded onto the third screw.

[0020] The lifting component includes: an electric push rod, which is fixed inside the moving block; and an electromagnet ball, which is welded to the output end of the electric push rod and is adapted to the groove at the bottom of the tile.

[0021] The control components include: multiple fans, bolted to the top of the rotating disk; a bracket, bolted to the top of the fixed disk; a rotating ring, rotatably mounted inside the bracket via bearings, containing fan blades that cooperate with the fans; a control strip, fixed to the outer wall of the rotating ring; and an electromagnet ring, bolted to the upper side of the bracket and sleeved on the outside of the rotating ring, with multiple proximity switches embedded in its inner side that cooperate with the control strip.

[0022] It also includes two collection boxes, which are bolted to the top of the rotating disk and located on the inside and outside of the house, respectively, below the window.

[0023] The tile can rotate freely around the hinge after the electromagnet bar is de-energized, and the opening state is fixed and the closing state is achieved by the cooperation of the electromagnet ball and the groove.

[0024] When the fan blows the blades and drives the rotating ring to rotate, the control bar triggers different proximity switches to randomly select the position of the tile to be opened.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. The wind tunnel testing device disclosed in this invention, used to simulate the internal and external wind pressure of low-rise buildings with actual openings, can simulate the working conditions of arbitrary openings in the roof, the working conditions of openings in the wall under projectiles, and the working conditions of arbitrary openings in both the wall and roof simultaneously. Through the simulation of these working conditions, the internal and external wind pressure distribution of low-rise buildings under different wind pressures and projectile influences can be more comprehensively evaluated, providing a scientific basis for building structural design. Furthermore, by driving the rotating disk to rotate via a motor at the bottom of the fixed disk, and thus rotating the roof, different wind directions can be simulated conveniently and quickly, comprehensively studying the influence of different wind directions on the internal and external wind pressure distribution characteristics of buildings, providing richer data support for the wind-resistant design of low-rise buildings.

[0027] 2. The wind tunnel testing device disclosed in this invention is used to simulate the wind pressure inside and outside the actual low-rise building with openings. During the wind tunnel test, the launcher is activated to launch a baseball that impacts the building with the wind. This can simulate the damage to the building caused by flying objects, effectively test the safety of the building when it is subjected to the impact of flying objects, help to discover the weak points of the building under extreme conditions, and provide a basis for optimizing the building structure and improving its impact resistance.

[0028] 3. The wind tunnel test device disclosed in this invention for simulating the wind pressure inside and outside of actual low-rise buildings with openings utilizes a fan to rotate the blades. Through a series of mechanical transmissions and electromagnetic controls, the position adjustment of the lifting component can be automatically controlled to precisely and randomly open individual tiles and support and fix them. This facilitates the study of the wind pressure distribution characteristics inside and outside the building under the state of opening a single tile and the analysis of the relationship between different opening positions and the wind pressure coefficient.

[0029] 4. The wind tunnel testing device disclosed in this invention for simulating the wind pressure inside and outside a low-rise building with actual openings uses a second motor to drive the first screw to rotate, which in turn drives the nut block, semi-circular ring, second connecting ring, and other components to move. This causes the key pin to be inserted into the rectangular opening of the first connecting ring and the drive rod, thus achieving a fixed connection between the first connecting ring and the drive rod. Then, the first motor drives the drive rod to rotate, and the rotation of the mounting plate increases the roof opening. This can simulate the influence of the degree of roof opening on the wind pressure inside and outside the building, and explore the variation law between different opening degrees and the wind pressure coefficient. Furthermore, after the mounting plate is flipped, it is convenient to replace broken tiles.

[0030] 5. The wind tunnel testing device disclosed in this invention, used to simulate the wind pressure inside and outside actual low-rise buildings with openings, can systematically study the influence of such opening conditions on the wind pressure distribution characteristics inside and outside the building by simulating the possible open states of tiles in actual buildings, such as loosening or opening caused by wind. It can also analyze the relationship between different opening degrees, opening positions and other factors and the wind pressure coefficient, providing a large amount of accurate experimental data and solid theoretical basis for the wind-resistant design of low-rise buildings, optimization of tile connection structure and research on wind-induced damage mechanisms. This helps to improve the wind resistance performance of low-rise buildings and reduce wind disaster losses.

[0031] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0033] Figure 1 This is a three-dimensional structural schematic diagram of the wind tunnel test device of the present invention used to simulate the wind pressure inside and outside actual low-rise buildings with openings.

[0034] Figure 2 For the present invention Figure 1 Schematic diagram of the roof module structure;

[0035] Figure 3 For the present invention Figure 1 Schematic diagram of the connection structure between the mounting plate and the drive rod;

[0036] Figure 4 For the present invention Figure 1 Schematic diagram of the connection structure between the middle tile and the mounting plate;

[0037] Figure 5 For the present invention Figure 1 Schematic diagram of the connection structure between the moving block and the mounting frame;

[0038] Figure 6 For the present invention Figure 1 Schematic diagram of the mid-spine structure;

[0039] Figure 7 For the present invention Figure 1 Schematic diagram of the central control loop and bracket installation structure.

[0040] Reference numerals: 1. Fixed plate; 2. Rotating plate; 3. Roof; 4. Door; 5. Window; 6. Roof module; 7. Transmitter; 8. Fixed rod; 9. Fan; 10. Collection frame; 11. Mounting plate; 12. Tile; 13. Rotating seat; 14. First motor; 15. Second motor; 16. First screw; 17. Drive rod; 18. First connecting ring; 19. Second connecting ring; 20. Rectangular opening; 21. Annular slide bar; 22. Key pin 23. Semicircular ring; 24. Connecting column; 25. Nut block; 26. Hinge; 27. Electromagnetic strip; 28. Groove; 29. ​​Mounting frame; 30. Second screw; 31. Third motor; 32. Moving strip; 33. Third screw; 34. Fourth motor; 35. Moving block; 36. Electric push rod; 37. Electromagnetic ball; 38. Spine; 39. Bracket; 40. Electromagnetic ring; 41. Rotating ring; 42. Fan blade; 43. Control strip. Detailed Implementation

[0041] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0042] like Figures 1-7 The wind tunnel test device shown is used to simulate the wind pressure inside and outside the actual low-rise building with openings. Its purpose is to study the influence of such opening states (such as loosening or opening caused by wind) on the wind pressure distribution characteristics inside and outside the building by simulating the possible opening states of tiles in actual buildings. It analyzes the relationship between the wind pressure coefficient and factors such as different opening degrees and opening positions, and thus provides experimental data and theoretical basis for the wind-resistant design of low-rise buildings, optimization of tile connection structure, and research on wind-induced damage mechanisms.

[0043] Its specific structure is as follows: A fixed disk 1 is securely mounted in a designated location within the wind tunnel laboratory using bolts or other fixing methods. Inside the fixed disk 1, a rotating disk 2 is mounted via a rotatable connection such as bearings, allowing it to rotate freely within the fixed disk 1. A motor (not shown in the figure) is connected to the bottom of the rotating disk 2. The motor is bolted to the bottom of the fixed disk 1, and its output shaft is connected to the central axis of the rotating disk 2. Starting the motor drives the rotating disk 2 to rotate, which in turn causes the roof 3 mounted on top of the rotating disk 2 to rotate, facilitating testing in different wind directions.

[0044] The roof body 3 is detachably mounted on top of the rotating disk 2. A door 4 and a window 5 are provided on one side of the roof body 3 to simulate the openings in actual buildings. The top of the roof body 3 is in the shape of a V-shape, with several rows of roof modules 6 evenly arranged on both sides. A spine 38 is fixedly mounted on the top of the roof body 3. The spine 38 is made of electromagnet and is used to fix the top of the roof modules 6 to ensure the stability of the roof modules 6.

[0045] Each roof module 6 includes a long, narrow mounting plate 11 and multiple tiles 12 mounted on the mounting plate 11. The top of the mounting plate 11 has rectangular holes corresponding to the tiles 12. The tiles 12 are hinged within these rectangular holes via hinges 26, allowing them to rotate within the holes. Electromagnetic strips 27 are located on both sides of each tile 12. Under normal conditions, the magnetic force of the two electromagnets 27 holds the tile 12 within the mounting plate 11, preventing it from rotating arbitrarily. When the wind force reaches a certain value, it can overcome the magnetic force of the electromagnets 27 and open the tile 12. The bottom of each tile 12 has a groove 28 that matches an electromagnet ball 37, providing support and fixation for the opened tile 12. The mounting plate 11 is made of iron to facilitate its use with the roof ridge 38.

[0046] Both sides of the roof 3 are equipped with a flipping mechanism, which consists of a driving component and a snap-fit ​​component. The driving component includes two rotating seats 13 bolted to one side of the roof 3, with a driving rod 17 rotatably mounted between them via a bearing. A first motor 14 is bolted to one side of one of the rotating seats 13, and the output end of the first motor 14 is fixedly connected to the driving rod 17. A first connecting ring 18 is welded to the bottom of the mounting plate 11, and the first connecting ring 18 is rotatably fitted onto the driving rod 17. When it is necessary to drive the mounting plate 11 to flip, the first connecting ring 18 is fixed to the driving rod 17 via the snap-fit ​​component, and then the first motor 14 is started. The first motor 14 drives the driving rod 17 to rotate, and the driving rod 17, through the first connecting ring 18, drives the mounting plate 11 to flip.

[0047] The snap-fit ​​component includes a first screw 16 rotatably mounted between two rotating seats 13 via bearings. A second motor 15 is bolted to one side of one of the rotating seats 13, and the output end of the second motor 15 is fixedly connected to the first screw 16. A nut block 25 is threaded onto the outer wall of the first screw 16. The nut block 25 is slidably mounted on one side of the roof 3 via a guide rail to ensure the stability of the nut block 25 during movement. A semi-circular ring 23 is connected to the top of the nut block 25 via a connecting post 24. A second connecting ring 19 is slidably mounted inside the semi-circular ring 23 via two annular slide bars 21. The second connecting ring 19 is fitted onto the first connecting ring 18. Rectangular openings 20 are provided on the outer walls of both the first connecting ring 18 and the drive rod 17. Key pins 22 are provided in the two rectangular openings 20 and are welded to the inner wall of the second connecting ring 19.

[0048] When multiple roof modules 6 need to be opened simultaneously, the second motor 15 is started to drive the first screw 16 to rotate. During the rotation of the first screw 16, the nut block 25 is driven to move. The nut block 25 drives the semi-circular ring 23 to move through the connecting column 24. The semi-circular ring 23 drives the second connecting ring 19 to move through the two annular slide bars 21 until the second connecting ring 19 moves to the corresponding side of the mounting plate 11. At this time, the key pin 22 is inserted into the rectangular opening 20 of the first connecting ring 18 and the drive rod 17 to achieve a fixed connection between the first connecting ring 18 and the drive rod 17. Then, the first motor 14 is started to drive the drive rod 17 to rotate. The drive rod 17 drives the first connecting ring 18 to rotate through the rectangular opening 20 and the annular slide bars 21. The first connecting ring 18 drives the mounting plate 11 to rotate. During the swing of the mounting plate 11, the second connecting ring 19 is driven to move within the semi-circular ring 23. The rotation of the mounting plate 11 increases the roof opening, and after the mounting plate 11 is flipped, it is convenient to replace broken tiles 12.

[0049] The roof structure 3 is also equipped with two sets of opening and closing components, each consisting of an adjusting component and a lifting component. The adjusting component moves the lifting component to the corresponding tile 12, thus opening and closing the tile 12. The adjusting component includes a mounting frame 29 bolted to the roof structure 3. A second screw 30 is rotatably mounted within the mounting frame 29 via bearings. A third motor 31 is bolted to one side of the mounting frame 29, and the output end of the third motor 31 is welded to the second screw 30. A moving strip 32 is slidably mounted within the mounting frame 29 via a guide rail, and the moving strip 32 is threaded onto the second screw 30. When the position of the lifting component needs to be adjusted, the third motor 31 is activated to rotate the second screw 30. During the rotation of the second screw 30, the moving strip 32 moves along the guide rail within the mounting frame 29, thereby moving the lifting component to the corresponding tile 12.

[0050] A third screw 33 is rotatably mounted within the moving bar 32 via bearings. A fourth motor 34 is bolted to the moving bar 32. A moving block 35 is slidably mounted within the moving bar 32 via a guide rail, and the moving block 35 is threaded onto the third screw 33. The lifting component includes an electric push rod 36 that is fixedly mounted through the moving block 35, and an electromagnet ball 37 is welded to the output end of the electric push rod 36. When the moving bar 32 moves the lifting component to the desired position, the fourth motor 34 is activated to rotate the third screw 33. During the rotation of the third screw 33, the moving block 35 is driven to move along the guide rail within the moving bar 32, further precisely adjusting the position of the lifting component so that it is accurately positioned below the corresponding tile 12. Then, the electric push rod 36 is extended. During the extension of the electric push rod 36, the electromagnet strip 27 is closed. At this time, the tile 12 opens under the action of gravity and falls onto the electric push rod 36. The electromagnet ball 37 on the electric push rod 36 is activated to fix the tile 12, thereby supporting the opened tile 12 for wind pressure testing. Conversely, the tile 12 can be closed.

[0051] A fixed rod 8 is installed below the wind source, and a launcher 7 is installed on the fixed rod 8. The launcher 7 is installed on the fixed rod 8 by bolts or other fixing methods. A baseball or other simulated projectile can be placed inside the launcher 7. The launcher 7 adopts the baseball launcher in patent document CN220047031U. By activating the launcher 7, the baseball is launched and impacts the door 4 and window 5 on the building 3 with the downwind, thereby simulating the coupling effect of the projectile damaging different positions of the door 4 and window 5 on the building 3 and the wind pressure, and further testing the internal and external wind pressure distribution of the building.

[0052] A control unit is installed on the rotating disk 2, including multiple fans 9 bolted to the top of the rotating disk 2. A bracket 39 is bolted to the top of the fixed disk 1, and a rotating ring 41 is rotatably mounted inside the bracket 39 via bearings. Fan blades 42, which cooperate with the fans 9, are fixedly connected to the rotating ring 41 at their blade ends. A control strip 43, with a gap between it and an electromagnet ring 40, is fixedly mounted on the outer wall of the rotating ring 41. An electromagnet ring 40, fitted around the rotating ring 41, is bolted to the upper side of the bracket 39. Multiple proximity switches, which cooperate with the control strip 43, are embedded on one side of the electromagnet ring 40. When the fans 9 and fan blades 42 are aligned, the fans 9 start, causing the fan blades 42 to rotate. During the rotation of the fan blades 42, the rotating ring 41 drives the control strip 43 to rotate. When the control bar 43 rotates, the electromagnet ring 40 is activated. The electromagnet ring 40 can randomly electromagnetically fix the rotating control bar 43. According to the position of the control bar 43, the proximity switch on one side of the electromagnet ring 40 is controlled. The proximity switch drives the third motor 31 and the fourth motor 34 to move the moving block 35 to the bottom of the corresponding tile 12, so as to realize the automatic control of the position adjustment of the lifting component, so as to randomly open the tile 12 at different positions for wind pressure testing.

[0053] Two collection frames 10 are provided on the top of the rotating disk 2. The two collection frames 10 are located on the inner and outer sides of the roof 3, respectively, and below the window 5. When the door 4 is broken, the broken glass can be collected through the two collection frames 10 for subsequent processing and analysis.

[0054] This wind tunnel testing device, used to simulate the wind pressure inside and outside a low-rise building with actual openings, conducts wind tunnel tests. When simulating the condition of a projectile impacting an opening in the wall, the motor at the bottom of the fixed plate 1 drives the rotating plate 2 to rotate, which in turn drives the roof 3 to rotate, allowing for testing in different wind directions. Simultaneously, the launcher 7 launches a projectile, which impacts the door 4 and window 5 on the roof 3 with the wind, thus simulating the coupling effect of the projectile damaging the door 4 and window 5 at different locations on the roof 3 from different angles, and the resulting wind pressure. This allows for testing the distribution of wind pressure inside and outside the building and recording the corresponding test data. Furthermore, when the door 4 is broken, the shattered glass can be collected through two collection frames 10.

[0055] When simulating a roof with arbitrary openings, the fan 9 drives the fan blades 42 to rotate. During this rotation, the fan blades 42 drive the control strip 43 to rotate via the rotating ring 41. Once the control strip 43 rotates, the electromagnet ring 40 is activated, electromagnetically attracting and fixing the rotating control strip 43. The position of the control strip 43 controls the proximity switches on the outside of the electromagnet ring 40. The electromagnet ring 40 has multiple proximity switches, each corresponding to a tile. These proximity switches drive the third motor 31 and the fourth motor 34, moving the moving block 35 to its corresponding position. Below the tile 12, the electric push rod 36 is extended. During the extension of the electric push rod 36, the electromagnet strip 27 is closed. At this time, the tile 12 can open under gravity and fall onto the electric push rod 36. The electromagnet ball 37 on the electric push rod 36 is activated to fix the tile 12, thus supporting the opened tile 12. The wind direction in the wind tunnel test chamber is from the side of the fixed rod 8 towards the roof 3. The bracket 39 is located behind the roof 3. Therefore, the wind force of the bracket 39 and the fan 9 to open the roof 3 and the random tile 12 is much less than the wind force in the wind tunnel test chamber and will not affect the wind tunnel test.

[0056] When it is necessary to increase the roof opening, the second motor 15 is started to drive the first screw 16 to rotate. During the rotation of the first screw 16, the nut block 25 is driven to move. The movement of the nut block 25 can drive the semi-circular ring 23 to move via the connecting post 24. The movement of the semi-circular ring 23 can drive the second connecting ring 19 to move via the two annular slide bars 21 until the second connecting ring 19 moves to the corresponding side of the mounting plate 11. At this time, the key pin 22 is inserted into the first connecting ring 18 and the drive rod 17. The first motor 14 is started to drive the drive rod 17 to rotate. The rotation of the first connecting ring 18 can be driven to rotate by the rectangular opening 20 and the annular slide bar 21. The rotation of the first connecting ring 18 can drive the mounting plate 11 to rotate. During the swing of the mounting plate 11, the second connecting ring 19 can be driven to move within the semi-circular ring 23. Under the action of gravity, multiple tiles 12 on a row of mounting plates 11 can be opened at the same time. The rotation of the mounting plate 11 increases the roof opening, allowing for in-depth exploration of the variation law between different opening degrees and wind pressure coefficient. Furthermore, after the mounting plate 11 is flipped, broken tiles 12 can be easily replaced.

[0057] When it is necessary to simulate the working condition of simultaneously opening arbitrary holes in the wall and roof, the above-mentioned launcher 7 can be combined with the flipping mechanism to launch projectiles.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A wind tunnel testing device for simulating the wind pressure inside and outside actual low-rise buildings with openings, characterized in that, The roof (3) includes a roof body with a herringbone shape at the top and several rows of roof modules (6) evenly arranged on both sides. Each roof module (6) includes a long mounting plate (11) and multiple tiles (12) set on the mounting plate (11). The top of the mounting plate (11) has a rectangular hole corresponding to the tile (12). The tile (12) is hinged in the rectangular hole by a hinge (26). Electromagnetic strips (27) are provided on both sides of the tile (12) to fix the tile (12) in the mounting plate (11). A groove (28) is provided at the bottom of the middle part of the tile (12). The roof body (3) is provided with an adjusting component and a lifting component to open and close the tile (12). The adjusting component includes a mounting frame (29) fixedly installed in the roof body (3). The mounting frame (29) is connected by bearings. A second screw (30) is rotatably mounted, and a third motor (31) is fixedly connected to one side of the mounting frame (29). The output end of the third motor (31) is welded to the second screw (30). A moving strip (32) is slidably mounted on the second screw (30) through a guide rail inside the mounting frame (29). A third screw (33) is rotatably mounted inside the moving strip (32). A fourth motor (34) is fixedly connected inside the moving strip (32). A moving block (35) is slidably mounted on the moving strip (32) and mounted on the third screw (33). The lifting component includes an electric push rod (36) that is fixedly mounted inside the moving block (35). An electromagnet ball (37) that matches the groove (28) at the bottom of the tile (12) is welded to the output end of the electric push rod (36).

2. The wind tunnel testing apparatus according to claim 1, characterized in that, Both sides of the roof (3) are provided with a flipping mechanism consisting of a driving component and a snap-fit ​​component. The driving component includes two rotating seats (13) fixedly connected to one side of the roof (3) and arranged vertically. A driving rod (17) is rotatably arranged between the two rotating seats (13) through a bearing. The snap-fit ​​component is used in conjunction with the corresponding mounting plate (11) through the driving rod (17) to realize the flipping action of the mounting plate (11).

3. The wind tunnel testing apparatus according to claim 2, characterized in that, A first motor (14) is fixedly connected to the outer side of the upper rotating seat (13). The output end of the first motor (14) is fixedly connected to the drive rod (17). A first connecting ring (18) is welded to the bottom end of the mounting plate (11). The first connecting ring (18) is rotatably sleeved on the drive rod (17). A second motor (15) is fixedly connected to the outer side of the lower rotating seat (13). A first screw (16) is fixedly connected to the output end of the second motor (15). A nut block (25) is threaded on the outer wall of the first screw (16). The nut block (25) is slidably set on one side of the roof (3) through the guide rail. A semi-circular ring (23) is connected to the top of the nut block (25) through the connecting column (24). A second connecting ring (19) is slidably set inside the semi-circular ring (23) through two annular slide bars (21). The second connecting ring (19) is sleeved on the first connecting ring (18).

4. The wind tunnel testing apparatus according to claim 3, characterized in that, The outer walls of the first connecting ring (18) and the drive rod (17) are provided with rectangular openings (20), and key pins (22) are fixedly installed on the inner wall of the second connecting ring (19) in the two rectangular openings (20).

5. The wind tunnel testing apparatus according to claim 1, characterized in that, It also includes a rotating disk (2) for placing the house (3) and a fixed disk (1) rotatably connected to the outside of the rotating disk (2). The house (3) has a door (4) and a window (5) on one side. Multiple brackets (39) with fan blades (42) are evenly fixed on the fixed disk (1). A fan (9) is fixed on the rotating disk (2) to provide power to the fan blades (42) in the brackets (39).

6. The wind tunnel testing apparatus according to claim 5, characterized in that, The bracket (39) is provided with a rotating ring (41) rotatably mounted on a bearing. An electromagnet ring (40) is fixedly connected to the upper side of the bracket (39) and sleeved on the rotating ring (41). A fan blade (42) is provided inside the rotating ring (41) for use with the fan (9) and whose blade end is fixedly connected to the rotating ring (41). A control strip (43) with a gap between it and the electromagnet ring (40) is fixedly mounted on the outer wall of the rotating ring (41). A plurality of proximity switches for use with the control strip (43) are embedded on the side of the electromagnet ring (40) near the control strip (43).

7. The wind tunnel testing apparatus according to claim 1, characterized in that, A spine (38) is fixedly installed on the top of the roof (3). The spine (38) is made of electromagnet and is used to fix the top of the roof module (6) to ensure the stability of the roof module (6).

8. The wind tunnel testing apparatus according to claim 5, characterized in that, A fixing rod (8) is provided on the outside of the fixing plate (1), and a launcher (7) is provided on the fixing rod (8) to facilitate the simulation of launching flying objects.

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