Simulation experiment device for mobile downburst of gust

Abstract

The invention discloses a gust moving type downburst simulation experiment device which comprises a supporting steel frame provided with a transmission belt, the supporting steel frame below the transmission belt is provided with a fixed transverse plate, the fixed transverse plate is provided with a guide moving groove, a moving platform is connected between the guide moving groove and the transmission belt, and the lower side of the moving platform is provided with a jet flow mechanism. Hydraulic buffers are arranged at the two ends of the fixed transverse plate, and a testing platform is arranged on the supporting steel frame under the jet flow mechanism; the main control computer controls the servo motor to accurately and independently adjust the position and the speed of each group of guide plates, so that a downburst wind field highly consistent with a real meteorological condition is generated, various wind field conditions can be flexibly coped, downburst gust effects under the various wind field conditions can be simulated, the flexibility of the device is improved, and the test efficiency is improved. Meanwhile, due to high-precision control of machinery, the repeatability of an experiment is improved, and fluctuation of an experiment result is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wind tunnel experiments, and in particular to a simulation experiment device for a gust of wind mobile downburst. Background Art

[0002] Downburst is a strong local meteorological phenomenon, usually accompanied by extremely strong gust effects, posing a great threat to buildings, transportation facilities and agricultural production. In order to study and simulate the impact of downbursts on different structures, existing experimental simulations mostly use impact jet devices.

[0003] However, these devices generally have the problem of insufficient flexibility in outflow control mechanism, and it is difficult to accurately simulate the variable wind field of downburst gusts in real weather, especially when considering gust and movement effects at the same time. For example, in some building wind tunnel experiments, since the existing devices are difficult to generate specific wind field patterns, the test results have large deviations. Therefore, the present invention proposes a simulation experimental device for gust mobile downburst to solve the problems existing in the prior art. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to propose a simulation experimental device for a gust of wind mobile downburst, which controls the servo motor by a main control machine to accurately and independently adjust the position and speed of each group of guide plates, thereby generating a downburst wind field that is highly consistent with the actual meteorological conditions. It can flexibly respond to a variety of wind field conditions and simulate the downburst gust effects under a variety of wind field conditions, thereby increasing the flexibility of the device and improving the scope of application of the device. At the same time, due to the high-precision control of the machinery, the repeatability of the experiment is increased, and the fluctuation of the experimental results is greatly reduced.

[0005] To achieve the purpose of the present invention, the present invention is implemented through the following technical scheme: a simulation experimental device of a gust of wind mobile downburst, including a supporting steel frame, a transmission belt, a fixed cross plate, a guide movable groove, a mobile platform, a jet mechanism, a hydraulic buffer and a test platform, the supporting steel frame is provided with a transmission belt, the supporting steel frame below the transmission belt is provided with a fixed cross plate, the fixed cross plate is provided with a guide movable groove, the mobile platform is connected between the guide movable groove and the transmission belt, the upper side of the mobile platform is fixedly connected to the lower side of the transmission belt, and is slidably adapted to the guide movable groove, the lower side of the mobile platform is provided with a jet mechanism, hydraulic buffers are fixedly provided at both ends of the fixed cross plate, and a test platform is provided on the supporting steel frame directly below the jet mechanism.

[0006] Further improvements are: the jet mechanism includes a fixed wind cylinder, an air inlet, a jet nozzle, an air outlet, a fan, a driving mechanism, a gust of wind baffle and a guide plate; a fixed wind cylinder is fixedly arranged under the mobile platform, an air inlet is arranged on one side of the fixed wind cylinder, and an air outlet is arranged on the other side; a jet nozzle is arranged under the fixed wind cylinder, a fan is arranged in the air inlet, and a guide plate and a gust of wind baffle are arranged in the fixed wind cylinder above the jet nozzle through a driving mechanism.

[0007] Further improvements are: the driving mechanism includes a driving motor, a servo motor, a transmission shaft, a bevel gear and an adjusting shaft, the fixed wind cylinder is provided with a driving motor, the side of the fixed wind cylinder is provided with a servo motor, the output end of the driving motor is provided with a transmission shaft, the transmission shaft is provided with bevel gears, an adjusting shaft is distributed in the fixed wind cylinder above the air outlet and the jet nozzle, one end of the adjusting shaft extends out of the fixed wind cylinder and is provided with a bevel gear, which meshes with the bevel gear on the transmission shaft for transmission, the gust baffle and the guide plate are fixedly connected to the adjusting shaft, and the adjusting shaft connected to the guide plate is connected to the output end of the servo motor.

[0008] Further improvements are: the adjustment shaft at the air outlet is distributed in parallel in the vertical direction, the gust baffle is fixedly connected to it, the adjustment shaft above the jet nozzle is distributed in parallel in the oblique direction, the guide plate is fixedly connected to it, and a feedback encoder is provided at the other end of the adjustment shaft above the jet nozzle.

[0009] A further improvement is that a main controller and a desktop computer are arranged on one side of the supporting steel frame, the desktop computer is electrically connected to the main controller, the transmission belt and the jet mechanism are electrically connected to the main controller, and a control system is built into the main controller.

[0010] Further improvements are as follows: the control system includes a parameter setting module, a control feedback module and an acquisition and analysis module, the parameter setting module is used to set the operating parameters of the jet mechanism, the control feedback module is used to control the operation of the jet mechanism and feedback detection of the operating status according to the set parameters to generate different wind field modes, and the acquisition and analysis module is used to collect simulation data to analyze the impact of wind field conditions on the experimental model.

[0011] Further improvements are: the parameter setting module is implemented based on a desktop computer, the control feedback module includes an operation control submodule, a state feedback submodule and an adjustment control submodule, the operation control submodule is used to control the jet mechanism to move and adjust according to the set parameters, the state feedback submodule detects the position information of the guide plate based on the feedback encoder, and the adjustment control submodule is used to perform real-time control and adjustment of the position of the guide plate according to the guide plate position information obtained by the state feedback submodule and the main controller parameter change information.

[0012] A further improvement is that the acquisition and analysis module includes a parameter acquisition submodule and an analysis output submodule. The parameter acquisition submodule acquires the parameter change data during the simulation process based on multiple groups of sensors, and the analysis output submodule is used to analyze and output the result data of the impact of different wind field conditions on the experimental model based on the acquired parameter change data.

[0013] The beneficial effects of the present invention are as follows: the present invention controls the servo motor through the main control machine to accurately and independently adjust the position and speed of each group of guide plates, thereby generating a downburst wind field that is highly consistent with the actual meteorological conditions, and can flexibly respond to various wind field conditions, simulate the downburst gust wind effect under various wind field conditions, increase the flexibility of the device, and improve the scope of application of the device. At the same time, due to the high-precision control of the machinery, the repeatability of the experiment is increased, and the fluctuation of the experimental results is greatly reduced;

[0014] When the device is used, high-precision adjustment and high-flexibility control can help reduce experimental costs, improve the strength of building design, and have important social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the front view of the present invention.

[0016] Figure 2 It is a front view cross-sectional structural diagram of the present invention.

[0017] Figure 3 It is a front view and cross-sectional structure diagram of the jet mechanism of the present invention.

[0018] Figure 4 It is a structural diagram of the driving mechanism of the present invention.

[0019] Figure 5 This is a control system architecture diagram of the present invention.

[0020] Among them: 1. Support steel frame; 2. Transmission belt; 3. Fixed cross plate; 4. Guide moving groove; 5. Mobile platform; 6. Hydraulic buffer; 7. Test platform; 8. Fixed air duct; 9. Air inlet; 10. Jet nozzle; 11. Air outlet; 12. Fan; 13. Gust baffle; 14. Guide plate; 15. Drive motor; 16. Servo motor; 17. Transmission shaft; 18. Bevel gear; 19. Adjustment shaft; 20. Feedback encoder; 21. Main controller; 22. Desktop computer. DETAILED DESCRIPTION

[0021] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0022] according to Figure 1-Figure 5As shown, the present embodiment provides a simulation experimental device for gust mobile downburst, including a supporting steel frame 1, a transmission belt 2, a fixed transverse plate 3, a guide movable groove 4, a mobile platform 5, a jet mechanism, a hydraulic buffer 6 and a test platform 7. The supporting steel frame 1 is provided with a transmission belt 2, a fixed transverse plate 3 is provided on the supporting steel frame 1 below the transmission belt 2, a guide movable groove 4 is provided on the fixed transverse plate 3, a mobile platform 5 is connected between the guide movable groove 4 and the transmission belt 2, the upper side of the mobile platform is fixedly connected to the lower side of the transmission belt and is slidably adapted to the guide movable groove, a jet mechanism is provided on the lower side of the mobile platform 5, hydraulic buffers 6 are fixedly provided at both ends of the fixed transverse plate 3, and a test platform 7 is provided on the supporting steel frame 1 directly below the jet mechanism.

[0023] The jet mechanism includes a fixed wind cylinder 8, an air inlet 9, a jet nozzle 10, an air outlet 11, a fan 12, a driving mechanism, a gust baffle 13 and a guide plate 14. The fixed wind cylinder 8 is fixedly arranged below the mobile platform 5, the air inlet 9 is arranged on one side of the fixed wind cylinder 8, and the air outlet 11 is arranged on the other side. The jet nozzle 10 is arranged below the fixed wind cylinder 8, and the fan 12 is arranged in the air inlet 9. The guide plate 14 and the gust baffle 13 are arranged in the fixed wind cylinder 8 above the jet nozzle 10 through the driving mechanism.

[0024] The driving mechanism includes a driving motor 15, a servo motor 16, a transmission shaft 17, a bevel gear 18 and an adjusting shaft 19. The driving motor 15 is arranged on the fixed wind tube 8, and the servo motor 16 is distributed on the side of the fixed wind tube 8. The output ends of the driving motor 15 and the servo motor 16 are provided with a transmission shaft 17, and the transmission shaft 17 is provided with a bevel gear 18. An adjusting shaft 19 is distributed in the fixed wind tube 8 above the air outlet 11 and the jet nozzle 10. One end of the adjusting shaft 19 extends out of the fixed wind tube and is provided with a bevel gear 18, which meshes with the bevel gear 18 on the transmission shaft 17 for transmission. The gust baffle 13 and the guide plate 14 are fixedly connected to the adjusting shaft 19, and the adjusting shaft 19 connected to the guide plate 14 is connected to the output end of the servo motor 16. Multiple groups of servo motors connected to the adjusting shafts realize independent adjustment and drive of each group of guide plates.

[0025] The servo motor uses a high-precision servo motor with the ability of fast response and high torque output. It can adjust the angle and speed of the guide plate in real time according to the control signal; at the same time, it can generate almost completely consistent wind field conditions in multiple experiments, ensuring the repeatability of the experimental results. In a set of 30 consecutive simulation tests, the wind field parameters (including wind speed, wind direction, turbulence, etc.) generated by the device fluctuated within a range of only ±5%, which is significantly higher than the fluctuation range of traditional devices.

[0026] The adjustment shaft 19 at the air outlet 11 is distributed in parallel in the vertical direction, and the gust baffle 13 is fixedly connected to it. The adjustment shaft 19 above the jet nozzle 10 is distributed in parallel in the oblique direction, and the guide plate 14 is fixedly connected to it. A feedback encoder 20 is provided at the other end of the adjustment shaft 19 above the jet nozzle 10 to ensure that the position and speed of the guide plate are accurately fed back.

[0027] A main controller 21 and a desktop computer 22 are provided on one side of the supporting steel frame 1. The main controller can set the action process of the guide plate, including parameters such as rotation angle and rotation speed. The desktop computer 22 is electrically connected to the main controller 21, and the transmission belt 2 and the jet mechanism are electrically connected to the main controller 21. The main controller 21 has a built-in control system.

[0028] The control system includes a parameter setting module, a control feedback module and an acquisition and analysis module. The parameter setting module is used to set the operating parameters of the jet mechanism. The control feedback module is used to control the operation of the jet mechanism and the feedback detection of the operating status according to the set parameters to generate different wind field modes. The acquisition and analysis module is used to collect simulation data to analyze the impact of wind field conditions on the experimental model.

[0029] The parameter setting module is implemented based on a desktop computer 22. The precise control of the main controller and the flexibility of the parameter setting module greatly improve the applicability of the device. It is suitable for various scenarios such as building wind tunnel testing, wind power generation equipment testing, and aircraft aerodynamic performance experiments, thereby improving the applicability of the test device.

[0030] The control feedback module includes an operation control submodule, a state feedback submodule and an adjustment control submodule. The operation control submodule is used to control the jet mechanism to perform movement and adjustment according to the set parameters. The state feedback submodule detects the position information of the guide plate 14 based on the feedback encoder 20. The adjustment control submodule is used to perform real-time control and adjustment of the position of the guide plate 14 based on the position information of the guide plate 14 obtained by the state feedback submodule and the parameter change information of the main controller 21.

[0031] The control feedback module enables the deflector to accurately adjust its angle and speed according to the preset action process, thereby generating a downburst wind field that is highly consistent with the actual meteorological conditions. Compared with the traditional fixed deflection system, this application can flexibly respond to a variety of wind field conditions, including static gust wind fields and gust wind fields with mobile characteristics;

[0032] Verified by experimental data, the error rate of the wind field is controlled within 5% when simulating a strong downburst (wind speed exceeding 25 m / s), which significantly improves the accuracy of the experimental results.

[0033] The acquisition and analysis module includes a parameter acquisition submodule and an analysis output submodule. The parameter acquisition submodule acquires the parameter change data during the simulation process based on multiple sets of sensors. The analysis output submodule is used to analyze and output the result data of the impact of different wind field conditions on the experimental model based on the acquired parameter change data.

[0034] By precisely controlling the movement of the guide vanes and the motion pattern of the jet nozzles, various types of downburst wind fields can be generated, including stationary gusts and moving gust wind fields; the accuracy and flexibility of wind field simulation can be significantly improved, especially in terms of the moving effect of gusts, and the simulation effect is closer to real meteorological conditions.

[0035] The present invention helps to improve the wind resistance of building design, optimize the layout and structural design of wind power generation equipment, and ultimately reduce economic losses and casualties caused by meteorological disasters (downbursts), thus having important social benefits.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A gust mobile downburst simulation experimental device, characterized by: The invention comprises a supporting steel frame (1), a transmission belt (2), a fixed transverse plate (3), a guide movable groove (4), a mobile platform (5), a jet mechanism, a hydraulic buffer (6) and a test platform (7), wherein the supporting steel frame (1) is provided with a transmission belt (2), a fixed transverse plate (3) is provided on the supporting steel frame (1) below the transmission belt (2), a guide movable groove (4) is provided on the fixed transverse plate (3), a mobile platform (5) is connected between the guide movable groove (4) and the transmission belt (2), a jet mechanism is provided on the lower side of the mobile platform (5), hydraulic buffers (6) are provided at both ends of the fixed transverse plate (3), and a test platform (7) is provided on the supporting steel frame (1) directly below the jet mechanism.

2. The gust mobile downburst simulation experimental device according to claim 1, characterized in that: The jet mechanism comprises a fixed wind cylinder (8), an air inlet (9), a jet nozzle (10), an air outlet (11), a fan (12), a driving mechanism, a gust shield (13) and a guide plate (14); a fixed wind cylinder (8) is provided below the mobile platform (5); an air inlet (9) is provided on one side of the fixed wind cylinder (8) and an air outlet (11) is provided on the other side; a jet nozzle (10) is provided below the fixed wind cylinder (8); a fan (12) is provided in the air inlet (9); and a guide plate (14) and a gust shield (13) are provided in the fixed wind cylinder (8) above the jet nozzle (10) through a driving mechanism.

3. The gust mobile downburst simulation experimental device according to claim 2, characterized in that: The driving mechanism comprises a driving motor (15), a servo motor (16), a transmission shaft (17), a bevel gear (18) and an adjusting shaft (19); the fixed wind tube (8) is provided with a driving motor (15); the side of the fixed wind tube (8) is provided with a servo motor (16); the output end of the driving motor (15) is provided with a transmission shaft (17); the transmission shaft (17) is provided with a bevel gear (18); the fixed wind tube (8) above the air outlet (11) and the jet nozzle (10) is provided with an adjusting shaft (19); one end of the adjusting shaft (19) extends out of the fixed wind tube and is provided with a bevel gear (18), which is meshed with the bevel gear (18) on the transmission shaft (17) for transmission; the gust shield (13) and the guide plate (14) are fixedly connected to the adjusting shaft (19); the adjusting shaft (19) connected to the guide plate (14) is connected to the output end of the servo motor (16).

4. The gust mobile downburst simulation experimental device according to claim 3 is characterized by: The adjustment shaft (19) at the air outlet (11) is distributed in parallel in the vertical direction, the gust shield (13) is fixedly connected thereto, the adjustment shaft (19) above the jet nozzle (10) is distributed in parallel in the oblique direction, the guide plate (14) is fixedly connected thereto, and a feedback encoder (20) is provided at the other end of the adjustment shaft (19) above the jet nozzle (10).

5. The gust mobile downburst simulation experimental device according to claim 1 is characterized in that ::A main controller (21) and a desktop computer (22) are provided on one side of the supporting steel frame (1); the desktop computer (22) is electrically connected to the main controller (21); the transmission belt (2) and the jet mechanism are electrically connected to the main controller (21); and a control system is built into the main controller (21).

6. The gust mobile downburst simulation experimental device according to claim 5, characterized in that: The control system includes a parameter setting module, a control feedback module and an acquisition and analysis module. The parameter setting module is used to set the operating parameters of the jet mechanism. The control feedback module is used to control the operation of the jet mechanism and feedback detection of the operating status according to the set parameters to generate different wind field modes. The acquisition and analysis module is used to collect simulation data to analyze the impact of wind field conditions on the experimental model.

7. The gust mobile downburst simulation experimental device according to claim 6, characterized in that: The parameter setting module is implemented based on a desktop computer (22); the control feedback module comprises an operation control submodule, a state feedback submodule and an adjustment control submodule; the operation control submodule is used to control the fluidic mechanism to perform movement and adjustment according to the set parameters; the state feedback submodule detects position information of the guide plate (14) based on a feedback encoder (20); and the adjustment control submodule is used to perform real-time control and adjustment of the position of the guide plate (14) according to the position information of the guide plate (14) obtained by the state feedback submodule and parameter change information of the main controller (21).

8. The gust mobile downburst simulation experimental device according to claim 6, characterized in that: The acquisition and analysis module includes a parameter acquisition submodule and an analysis output submodule. The parameter acquisition submodule acquires parameter change data during the simulation process based on multiple groups of sensors, and the analysis output submodule is used to analyze and output result data of the impact of different wind field conditions on the experimental model based on the acquired parameter change data.

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