Wind vibration analysis device for large-cantilever multi-curved-surface awning

Abstract

The invention discloses a wind vibration analysis device for a large-cantilever multi-curved-surface awning, and belongs to the technical field of building component detection. The device comprises an auxiliary mechanism, a fatigue value testing mechanism and a wind vibration testing mechanism, the fatigue value testing mechanism is installed at the position, close to the middle of the auxiliary mechanism, of the auxiliary mechanism, the wind vibration testing mechanism is installed at the position, close to the front end of the auxiliary mechanism, of the auxiliary mechanism, and a to-be-analyzed awning is slidably installed on the auxiliary mechanism. And testing is performed through the fatigue value testing mechanism and the wind vibration testing mechanism. The wind vibration analysis device is scientific in design, ingenious in structure, easy to operate and convenient to use, the diversity of analysis data is ensured through multi-angle and multi-intensity blowing testing, wind vibration bearing data are more accurate, accurate data are provided for awning designers to select proper wind vibration coefficients, and the design efficiency of the awning designers is improved. And the design compliance and safety of the awning are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of building component detection, and in particular is a wind vibration analysis device for a large cantilevered multi-curved awning. Background Art

[0002] Wind-induced vibration analysis of awnings is performed to ensure their structural safety and stability in rainy, windy or strong wind conditions. By evaluating the impact of wind loads on the vibration of the awning, fatigue or damage to the awning structure caused by wind vibration can be prevented, thereby optimizing the design and meeting building codes and safety standards.

[0003] Wind-induced vibration analysis of awnings requires a wind-induced vibration analysis device. Existing wind-induced vibration analysis devices typically simulate wind fields to study the awning's wind-induced vibration response. However, actual wind fields are complex and variable. Rather than steady flow, they incorporate random loads with turbulent and pulsating components, including varying wind directions, wind speed distributions, and turbulent flow characteristics. This results in insufficient data collection, leading to deviations between analysis results and actual conditions and making it difficult to intuitively understand the awning's maximum load-bearing amplitude.

[0004] With the rapid development of modern architectural technology, large steel cantilevered curved awnings have found widespread use in public facilities such as exhibition halls, hospitals, and schools due to their unique design and excellent functionality. However, the unique cantilever structure and curved surface design of these awnings make the natural frequency of the structure more likely to approach the pulsating frequency of wind, causing resonance and a large dynamic response. This makes the dynamic response under wind loads particularly complex, easily causing structural vibration and fatigue failure, thus affecting the safety of the structure and user comfort.

[0005] Therefore, it is urgent to design a new type of wind vibration analysis device to perform wind vibration analysis on large steel structure, large cantilever and multi-curved awnings to ensure their safety and stability under extreme weather conditions. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide a wind vibration analysis device for a large cantilevered multi-curved awning.

[0007] The present invention is achieved through the following technical solutions: A wind vibration analysis device for a large cantilevered multi-curved awning comprises an auxiliary mechanism, a fatigue value testing mechanism and a wind vibration testing mechanism.

[0008] The auxiliary mechanism comprises a moving platform which is slidably arranged along the front and rear directions, a supporting platform is vertically fixed on the moving platform, and a placing platform for fixing the awning is vertically fixed on the front side of the supporting platform.

[0009] The fatigue value testing mechanism is installed on the auxiliary mechanism near its middle position. The fatigue value testing mechanism includes a horizontal plate arranged to slide in the up and down directions. A dual-axis motor is installed on the horizontal plate. A connecting rod is connected to the output shaft of the dual-axis motor. The end of the connecting rod is rotatably connected to an eccentric wheel.

[0010] The wind vibration test mechanism is installed on the auxiliary mechanism near its front end. The wind vibration test mechanism includes a fan and an arc-shaped rack. The fan is slidably installed on the arc-shaped rack. A drive motor is installed on the fan. Gear three is installed on the output shaft of the drive motor. Gear three is meshed with the arc-shaped rack.

[0011] Furthermore, the auxiliary mechanism also includes a base, a front support plate, a rear support plate, two screw rods 1, two gears 1, two screw motors, two movable seats 1, and two sliding columns; the front support plate and the rear support plate are respectively vertically fixed to the front end and the rear end of the base, the two screw rods 1 are respectively rotatably installed between the two ends of the front support plate and the rear support plate, the two gears 1 are respectively fixedly installed on the two screw rods 1 at positions close to the rear support plate, the two screw motors are respectively installed at the outer ends of the rear support plate, and the output shafts of the two screw motors are respectively fixedly connected to the ends of the two screw rods 1. The two movable seats are respectively threadedly connected to the two screw rods, and a sliding sleeve is fixed to the inner end of the two movable seats. The two sliding columns are respectively vertically slidably connected in the two sliding sleeves, and the movable platform is horizontally fixed to the bottom ends of the two sliding columns; a weighing groove is provided on the base near its rear end, and the front and rear groove edges of the weighing groove are both designed with buffer slopes. A weighing instrument is provided in the weighing groove, and wheels are installed on both sides of the front and rear ends of the movable platform. When the movable platform moves to the weighing groove position, it will fall into the weighing groove and be placed on the weighing instrument.

[0012] Furthermore, the fatigue value testing mechanism also includes two front connecting seats, two rear connecting seats, two worm gears, two gear twos, two connecting plates, two slide rails, two screw rods twos, two turbines, and two movable seats two; the two front connecting seats are respectively fixed to the two end portions of the front support plate, and the two rear connecting seats are respectively fixed to the two end portions of the rear support plate, the two worm gears are respectively rotatably installed between the front connecting seat and the rear connecting seat on the same side, the two gear twos are respectively fixedly installed on the two worm gears near the rear connecting seat, the two gear twos are respectively meshed with the gear one on their corresponding sides, the two connecting plates are respectively fixedly connected to the two sides of the base, the two slide rails are respectively vertically fixed to the two connecting plates, and the two screw rods two are respectively vertically rotatably connected to the two connecting plates. On the plate, the two screw rods 2 are located between the two slide rails, and the two turbines are fixedly installed on the two screw rods 2 at positions close to the connecting plate. The two turbines are respectively meshed with the worm gears on their corresponding sides. The two movable seats 2 are respectively threadedly connected to the two screw rods 2. A slider 1 is fixed to the outer ends of the two movable seats 2. The two sliders 1 are respectively vertically slidably connected to the slide rails on their corresponding sides. The horizontal plate is vertically slidably connected between the inner ends of the two movable seats 2. A fixed platform is fixed at the middle position of the horizontal plate. The dual-axis motor is installed on the fixed platform. The two output shafts of the dual-axis motor are located on both sides of the fixed platform. The two output shafts of the dual-axis motor are respectively connected to a connecting rod, and the ends of the two connecting rods are rotatably connected to an eccentric wheel.

[0013] Furthermore, the wind vibration testing mechanism includes a fan, two arc-shaped racks, two arc-shaped guide rails, two drive motors, and two gear threes; the bottom ends of the two arc-shaped racks are respectively fixedly connected to the front end of the base, the arc openings of the two arc-shaped racks are set to face backward, and the two arc-shaped guide rails are respectively fixed to the outer side surfaces of the two arc-shaped racks. The fan is located in the arc openings of the two arc-shaped racks, and the air outlet direction of the fan is set to face backward. The two ends of the fan are respectively fixedly connected to a support rod, and the other ends of the two support rods are respectively fixedly connected to the two drive motors, and the other ends of the two drive motors are respectively fixedly connected to a fixed seat, and a group of clamping pulleys are respectively rotatably installed on the inner sides of the two fixed seats, and the two groups of clamping pulleys are respectively slidably clamped on the two arc-shaped guide rails. The two gear threes are respectively installed on the output shafts of the two drive motors, and the two gear threes are respectively meshed with the two arc-shaped racks.

[0014] Furthermore, a limit rod is fixedly connected between the two ends of the front support plate and the rear support plate, the two limit rods are respectively located directly below the two screw rods 1, and the two movable seats 1 are respectively slidably connected to the two limit rods.

[0015] Furthermore, limit blocks are respectively installed on the top ends of the two screw rods 2.

[0016] Furthermore, a vertical slide groove is respectively opened at the inner end of the two movable seats 2, and a slider 2 is fixed at each end of the horizontal plate. The two sliders 2 at both ends of the horizontal plate are respectively slidably connected in the vertical slide grooves on the two movable seats 2.

[0017] Furthermore, an anemometer is installed at the air outlet of the fan.

[0018] Furthermore, each set of clamping pulleys includes two pairs of front and rear clamping wheels, and the two pairs of clamping wheels are respectively slidably clamped on the front and rear end faces of the arc guide rail; each pair of clamping wheels includes a connecting column, which is connected to the fixed seat, and pulley one and pulley two are rotatably installed on the connecting column, and pulley one and pulley two are respectively rollingly clamped on both sides of the end face of the arc guide rail.

[0019] Furthermore, a reinforcement plate is fixedly connected between the top ends of the two arc-shaped rack rails.

[0020] When the device of the present invention is used, the awning to be analyzed for wind vibration is fixed to a support platform, i.e., a placement platform. The awning is driven to move to the position to be measured by an auxiliary mechanism. During the movement, the fan performs blowing tests on the awning at different distances, angles, and intensities. The wind speed blown out by the fan is monitored in real time by an anemometer. At the same time, the drive motor can drive gear three to rotate, causing gear three to move on the surface of the arc-shaped rack. The support rod drives the fan to perform tests at different angles. At the same time, pulley one on the surface of the fixed seat is connected to pulley two via a connecting column and clamps the arc-shaped guide rail. When gear three rotates and moves, it assists its movement, thereby improving the stability of the device. The device of the present invention can ensure the diversity of the analyzed data. The wind intensity is adjusted by the fan, the blowing angle is adjusted by the arc-shaped gear, the vibration state of the awning under different wind conditions is observed, and a data distribution diagram is drawn, thereby improving the adaptability of the device.

[0021] The wind vibration analysis device of the present invention has a scientific design, ingenious structure, simple operation and easy use. Through its multi-angle and multi-intensity wind blowing tests, it ensures the diversity of its analysis data, making its wind vibration bearing data more accurate, and providing accurate data for awning designers to select appropriate wind vibration coefficients, ensuring the compliance and safety of awning design. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings herein are used to provide further illustration of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their description are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 It is a schematic structural diagram of the device of the present invention when viewed from the side.

[0024] Figure 2 It is a schematic structural diagram of the device of the present invention in the front view direction.

[0025] Figure 3 It is a schematic structural diagram of the rear view direction of the device of the present invention.

[0026] Figure 4 It is a schematic diagram of the partial structure of the fatigue value testing mechanism in the device of the present invention.

[0027] Figure 5 It is a structural schematic diagram of the wind vibration testing mechanism in the device of the present invention.

[0028] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of part A.

[0029] In the figure: 1. Canopy; 2. Auxiliary mechanism; 201. Base; 202. Front support plate; 203. Slide; 204. Screw motor; 205. Gear 1; 206. Screw 1; 207. Limit rod; 208. Movable seat 1; 209. Weighing trough; 210. Sliding column; 211. Moving platform; 212. Rotating wheel; 213. Support table; 214. Rear support plate; 215. Placement table; 216. Weighing instrument; 217. Triangle fixing frame; 3. Fatigue value testing mechanism; 301. Front connecting seat; 302. Gear 2; 303. Worm; 304. Connecting plate; 305. Slide rail; 306. Turbine; 307, screw rod 2; 308, limit block; 309, slider 1; 310, movable seat 2; 311, slider 2; 312, horizontal plate; 313, fixed platform; 314, dual-axis motor; 315, connecting rod; 316, eccentric wheel; 317, rear connecting seat; 318, vertical slide; 4, wind vibration test mechanism; 401, arc-shaped rack; 402, arc-shaped guide rail; 403, gear 3; 404, drive motor; 405, support rod; 406, fan; 407, fixed seat; 408, pulley 1; 409, connecting column; 410, pulley 2; 411, anemometer; 412, reinforcement plate. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "front", "rear", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0032] like Figures 1 to 6 As shown, this embodiment provides a wind vibration analysis device for a large cantilevered multi-curved awning, including an auxiliary mechanism 2, a fatigue value testing mechanism 3 and a wind vibration testing mechanism 4; the auxiliary mechanism 2 includes a mobile platform 211 slidingly arranged in the front and rear directions, a support table 213 is vertically fixed on the mobile platform 211, and a placement table 215 for fixing the awning 1 is vertically fixed on the front side of the support table 213; the fatigue value testing mechanism 3 is installed on the auxiliary mechanism 2 near the middle thereof, and the fatigue value testing mechanism 3 includes a horizontal plate 312 slidingly arranged in the up and down directions, A dual-axis motor 314 is installed on the plate 312, and a connecting rod 315 is connected to the output shaft of the dual-axis motor 314, and the end of the connecting rod 315 is rotatably connected to the eccentric wheel 316; the wind vibration test mechanism 4 is installed on the auxiliary mechanism 2 near its front end, and the wind vibration test mechanism 4 includes a fan 406 and an arc-shaped rack 401, and the fan 406 is slidably installed on the arc-shaped rack 401, and a drive motor 404 is installed on the fan 406, and a gear three 403 is installed on the output shaft of the drive motor 404, and the gear three 403 is meshed with the arc-shaped rack 401.

[0033] The following is a more detailed description of the various components of the device of this embodiment: The auxiliary mechanism 2 includes a base 201, a front support plate 202, a rear support plate 214, a movable platform 211, a support table 213, two screw rods 206, two gears 205, two screw motors 204, two movable seats 208, and two sliding columns 210; the front support plate 202 and the rear support plate 214 are respectively vertically fixed at the front and rear ends of the base 201, the two screw rods 206 are respectively rotatably installed between the two ends of the front support plate 202 and the rear support plate 214, the two gears 205 are respectively fixedly installed on the two screw rods 206 near the position of the rear support plate 214, the two screw motors 204 are respectively installed at the outer ends of the rear support plate 214, and the output shafts of the two screw motors 204 are respectively The two movable seats 208 are respectively fixedly connected to the ends of the two screw rods 206, and the two movable seats 208 are respectively threadedly connected to the two screw rods 206. The inner ends of the two movable seats 208 are respectively fixed with a sliding sleeve 203. The two sliding columns 210 are respectively vertically slidably connected in the two sliding sleeves 203. The movable platform 211 is horizontally fixed to the bottom ends of the two sliding columns 210. The support table 213 is vertically fixed on the movable platform 211. The front side of the support table 213 is vertically fixed with a placement table 215 for fixing the awning 1. The fixing method of the awning 1 is specifically as follows: a triangular fixing frame 217 is respectively provided on both sides of the front side of the support table 213, and a strip fixing groove is opened on the triangular fixing frame 217, and a fastening bolt is passed through the strip fixing groove. The fastening bolts are threadedly connected to the support platform 213. After loosening the fastening bolts, the triangular fixing frame 217 can slide up and down relative to the support platform 213 through the strip fixing groove. When fixing the awning 1, first place the awning 1 support in the middle position of the placement platform 215, then loosen the fastening bolts, adjust the up and down positions of the triangular fixing frame 217 on the support platform 213, so that the bottom end of the triangular fixing frame 217 is stuck on the awning 1, and then tighten the fastening bolts. The awning 1 can be stably fixed between the two triangular fixing frames 217 and the placement platform 215. The triangular fixing frame 217 is set to be slidable in order to fix awnings 1 of different sizes to improve the applicability of the device; a position near the rear end of the base 201 is provided. A weighing trough 209 is provided through the base 201, and a weighing instrument 216 is provided in the weighing trough 209. When the mobile platform 211 moves to the weighing trough 209, it falls into the weighing trough 209 and is placed on the weighing instrument 216. The weighing instrument 216 weighs the awning 1 to obtain the weight data of the awning 1 under different wind conditions, so as to facilitate the calculation of the wind vibration coefficient and the understanding of the role of its own inertia force in the wind vibration process. The front and rear groove edges of the weighing trough 209 are designed with buffer slopes to facilitate the mobile platform 211 to enter and exit the weighing trough 209 more easily. The front and rear sides of the mobile platform 211 are both installed with wheels 212. The arrangement of the wheels 212 makes the movement of the mobile platform 211 easier and smoother.A limit rod 207 is fixedly connected between the ends of the front support plate 202 and the rear support plate 214. The two limit rods 207 are located directly below the two screw rods 206. The two movable seats 208 are slidably connected to the two limit rods 207. The provision of the limit rods 207 makes the movement of the movable seat 208 more stable.

[0034] The fatigue value testing mechanism 3 includes two front connecting seats 301, two rear connecting seats 317, two worms 303, two gears 2 302, two connecting plates 304, two slide rails 305, two screw rods 2 307, two turbines 306, and two movable seats 2 310; the two front connecting seats 301 are respectively fixed to the two end portions of the front support plate 202, the two rear connecting seats 317 are respectively fixed to the two end portions of the rear support plate 214, the two worms 303 are respectively rotatably installed between the front connecting seats 301 and the rear connecting seats 317 on the same side, and the two gears 2 30 2 are fixedly mounted on the two worms 303 at positions near the rear connecting seat 317, the two gears 2 302 are respectively engaged with the gears 1 205 on their corresponding sides, the two connecting plates 304 are respectively fixedly connected to the two sides of the base 201, the two slide rails 305 are respectively vertically fixed on the two connecting plates 304, the two screw rods 2 307 are respectively vertically rotatably connected to the two connecting plates 304, the two screw rods 2 307 are located between the two slide rails 305, the tops of the two screw rods 2 307 are respectively installed with limit blocks 308, and the two turbines 306 are respectively fixedly mounted on the two At a position near the connecting plate 304 on the second screw rod 307, the two turbines 306 are respectively engaged with the worm 303 on the corresponding side, and the two movable seats 310 are respectively threadedly connected to the two screw rods 307. The outer ends of the two movable seats 310 are respectively fixed with a slider 309, and the two sliders 309 are respectively vertically slidably connected to the slide rails 305 on the corresponding sides. A horizontal plate 312 is vertically slidably connected between the inner ends of the two movable seats 310. Specifically, the inner ends of the two movable seats 310 are respectively provided with a vertical slide groove 3 18. A slider 2 311 is fixed to each end of the horizontal plate 312. The two sliders 2 311 at both ends of the horizontal plate 312 are slidably connected to the vertical slide grooves 318 on the two movable seats 2 310. A fixed platform 313 is fixed at the middle position of the horizontal plate 312. A dual-axis motor 314 is installed on the fixed platform 313. The two output shafts of the dual-axis motor 314 are located on both sides of the fixed platform 313. The two output shafts of the dual-axis motor 314 are respectively connected to a connecting rod 315. The ends of the two connecting rods 315 are rotatably connected to an eccentric wheel 316.

[0035] The wind vibration test mechanism 4 includes a fan 406, two arc-shaped racks 401, two arc-shaped guide rails 402, two drive motors 404, and two gear threes 403; the bottom ends of the two arc-shaped racks 401 are respectively fixedly connected to the front end of the base 201, and a reinforcement plate 412 is fixedly connected between the top ends of the two arc-shaped racks 401. The arc openings of the two arc-shaped racks 401 are set to face backward, and the two arc-shaped guide rails 402 are respectively fixed to the outer sides of the two arc-shaped racks 401. The fan 406 is located in the arc openings of the two arc-shaped racks 401, and the air outlet direction of the fan 406 is set to face backward. An anemometer 411 is installed at the air outlet of the fan 406, and a support rod 405 is respectively fixedly connected to the two ends of the fan 406. The other ends of the two support rods 405 are respectively fixedly connected to the two drive motors 404. The other end of the driving motor 404 is fixedly connected to a fixed seat 407, and the inner sides of the two fixed seats 407 are rotatably installed with a group of clamping pulleys, and the two groups of clamping pulleys are slidably clamped on the two arc guide rails 402. Specifically, each group of clamping pulleys includes two pairs of front and rear clamping wheels, and the two pairs of clamping wheels are slidably clamped on the front and rear end surfaces of the arc guide rail 402; each pair of clamping wheels includes a connecting column 409, which is connected to the fixed seat 407, and pulley 1 408 and pulley 2 410 are rotatably installed on the connecting column 409, and pulley 1 408 and pulley 2 410 are respectively rollingly clamped on both sides of the end surface of the arc guide rail 402; two gear threes 403 are respectively installed on the output shafts of the two driving motors 404, and the two gear threes 403 are respectively meshed and connected with the two arc racks 401.

[0036] The method for using the wind vibration analysis device for a large cantilevered multi-curved awning described in this embodiment includes: 1) Install the canopy 1 on the surface of the placement table 215 and fix it stably through the triangular fixing frame 217. When the screw motor 204 drives the screw 1 206 to rotate, the screw 1 206 drives the movable seat 1 208 to move toward the direction of the wind vibration test mechanism 4. The limit rod 207 limits the movable seat 1 208 so that the movable seat 1 208 can stably drive the mobile platform 211 to move forward. The rotating wheel 212 assists the mobile platform 211 to move. When the mobile platform 211 moves to the position of the weighing slot 209, the sliding column 210 slides downward relative to the sliding sleeve 203 and cooperates with the rotating wheel 212, so that the mobile platform 211 smoothly enters the weighing slot 209. In the slot 209, the weighing instrument 216 in the weighing slot 209 measures the weight of the awning 1, which is convenient for calculating the wind vibration coefficient and can also understand the role of its own inertia force in the wind vibration process; after the weighing slot 209 measures the weight, the movable seat 208 is driven to continue to move through the screw rod 206, and when the rotating wheel 212 contacts the buffer slope of the weighing slot 209, the sliding column 210 slides upward relative to the sliding sleeve 203 and cooperates with the rotating wheel 212, so that the mobile platform 211 is smoothly moved out of the weighing slot 209. The setting of the buffer slope + rotating wheel 212 prevents the mobile platform 211 from being stuck when entering and exiting the weighing slot 209, thereby improving the adaptability of the device.

[0037] 2) The auxiliary mechanism 2 continues to drive the awning 1 to move forward. When the screw rod 1 206 rotates, the gear 1 205 on the surface of the screw rod 1 206 drives the gear 2 302 meshing with it to rotate. At this time, the worm 303 rotates and drives the turbine 306 meshing with the surface of the worm 303 to rotate, so that the screw rod 2 307 on the surface of the connecting plate 304 rotates and drives the movable seat 2 310 to move downward. The limit block 308 limits the height of the movable seat 2 310. At this time, the slider 1 309 assists the movable seat 2 310 to move downward along the slide rail 305. When the auxiliary mechanism 2 drives the awning 1 to move to the bottom end of the fatigue value testing mechanism 3, the movable seat 2 310 drives the cross plate 312 to fall exactly to the surface of the awning 1.

[0038] 3) A wind test is performed on the awning 1 through the wind vibration test mechanism 4, that is: the awning 1 is subjected to a wind test through the fan 406, and the wind speed blown out by the fan 406 is monitored in real time through the anemometer 411. At the same time, the gear three 403 can be driven to rotate by the drive motor 404, so that the gear three 403 moves on the surface of the arc-shaped rack 401, and the fan 406 is driven by the support rod 405 to perform tests at different angles. At the same time, the pulley one 408 on the fixed seat 407 is connected to the pulley two 410 through the connecting column 409 and clamps the arc-shaped guide rail 402. When the gear three 403 rotates and moves, it assists it in moving, thereby improving the stability of the device, ensuring the diversity of the analysis data, and improving the adaptability of the device.

[0039] 4) The fatigue value testing mechanism 3 is used to perform a vibration test on the awning 1. The dual-axis motor 314 on the fixed platform 313 drives the connecting rod 315 to rotate, causing the eccentric wheel 316 to rotate and vibrate, thereby driving the awning 1 to vibrate. When the natural frequency of the awning 1 structure approaches the pulsation frequency of the wind blown by the fan 406, the awning 1 will resonate. At this time, the awning 1 reaches its most unfavorable condition. The second sliders 311 on both sides of the cross plate 312 move up and down in the vertical slide grooves 318 on the second movable seat 310, so that the amplitude of the awning 1 does not produce data deviation due to the support of the second movable seat 310. By collecting the blowing data and the eccentric wheel rotation data, the most unfavorable condition of the simulation data is found, thereby improving the adaptability of the device.

[0040] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A wind vibration analysis device for a large cantilevered multi-curved awning, characterized by: It includes an auxiliary mechanism (2), a fatigue value testing mechanism (3) and a wind vibration testing mechanism (4); The auxiliary mechanism (2) comprises a movable platform (211) arranged to slide in the front-back direction, a support platform (213) being vertically fixed on the movable platform (211), and a placement platform (215) for fixing the awning (1) being vertically fixed on the front side of the support platform (213); The fatigue value testing mechanism (3) is installed on the auxiliary mechanism (2) at a position close to the middle thereof. The fatigue value testing mechanism (3) includes a horizontal plate (312) slidably arranged in an up-down direction. A dual-axis motor (314) is installed on the horizontal plate (312). A connecting rod (315) is connected to the output shaft of the dual-axis motor (314). The end of the connecting rod (315) is rotatably connected to an eccentric wheel (316). The wind vibration test mechanism (4) is installed on the auxiliary mechanism (2) at a position close to the front end thereof. The wind vibration test mechanism (4) includes a fan (406) and an arc-shaped rack (401). The fan (406) is slidably installed on the arc-shaped rack (401). A drive motor (404) is installed on the fan (406). A gear three (403) is installed on the output shaft of the drive motor (404). The gear three (403) is meshed with the arc-shaped rack (401).

2. The wind-induced vibration analysis device for a large cantilevered multi-curved awning according to claim 1, characterized in that: The auxiliary mechanism (2) further comprises a base (201), a front support plate (202), a rear support plate (214), two screw rods (206), two gears (205), two screw motors (204), two movable seats (208), and two sliding columns (210); the front support plate (202) and the rear support plate (214) are respectively vertically fixed to the front and rear ends of the base (201); the two screw rods (206) are respectively rotatably mounted between the two ends of the front support plate (202) and the rear support plate (214); the two gears (205) are respectively fixedly mounted on the two screw rods (206) at positions close to the rear support plate (214); the two screw motors (204) are respectively mounted on the outer ends of the rear support plate (214); and the output shafts of the two screw motors (204) are respectively fixedly connected to the ends of the two screw rods (206). The two movable seats (208) are respectively threadedly connected to the two screw rods (206), and the inner ends of the two movable seats (208) are respectively fixed with a sliding sleeve (203), and the two sliding columns (210) are respectively vertically slidably connected in the two sliding sleeves (203). The movable platform (211) is horizontally fixed to the bottom ends of the two sliding columns (210); a weighing groove (209) is provided on the base (201) near its rear end, and is provided through the base (201). The front and rear groove edges of the weighing groove (209) are both designed as buffer slopes. A weighing instrument (216) is provided in the weighing groove (209), and both sides of the front end and the rear end of the movable platform (211) are equipped with rotating wheels (212). When the movable platform (211) moves to the weighing groove (209) position, it will fall into the weighing groove (209) and be placed on the weighing instrument (216).

3. The wind-induced vibration analysis device for a large cantilevered multi-curved awning according to claim 2, characterized in that: The fatigue value testing mechanism (3) further comprises two front connecting seats (301), two rear connecting seats (317), two worms (303), two gears (302), two connecting plates (304), two slide rails (305), two screw rods (307), two turbines (306), and two movable seats (310); the two front connecting seats (301) are respectively fixed to the two end portions of the front support plate (202), the two rear connecting seats (317) are respectively fixed to the two end portions of the rear support plate (214), the two worms (303) are respectively fixed to the two end portions of the rear support plate (214), and the two The two gears (302) are respectively fixedly mounted on the two worms (303) at positions close to the rear connecting seat (317). The two gears (302) are respectively engaged with the gears (205) on the corresponding sides. The two connecting plates (304) are respectively fixedly connected to both sides of the base (201). The two slide rails (305) are respectively fixed vertically on the two connecting plates (304). The two screw rods (307) are respectively vertically connected to the two connecting plates. (304), two screw rods (307) are located between two slide rails (305), two turbines (306) are fixedly mounted on the two screw rods (307) at positions close to the connecting plate (304), the two turbines (306) are respectively engaged with the worms (303) on their respective sides, the two movable seats (310) are respectively threadedly connected to the two screw rods (307), the outer ends of the two movable seats (310) are respectively fixed with a slider (309), the two sliders (309) are respectively engaged with the sliders on their respective sides. The rail (305) is vertically slidably connected, the transverse plate (312) is vertically slidably connected between the inner ends of the two movable seats (310), a fixed platform (313) is fixed at the middle position of the transverse plate (312), a dual-axis motor (314) is installed on the fixed platform (313), two output shafts of the dual-axis motor (314) are located on both sides of the fixed platform (313), and a connecting rod (315) is respectively connected to the two output shafts of the dual-axis motor (314), and the ends of the two connecting rods (315) are rotatably connected to an eccentric wheel (316).

4. The wind-induced vibration analysis device for a large cantilevered multi-curved awning according to claim 3, characterized in that: The wind vibration test mechanism (4) includes a fan (406), two arc-shaped racks (401), two arc-shaped guide rails (402), two drive motors (404), and two gears (403); the bottom ends of the two arc-shaped racks (401) are fixedly connected to the front end of the base (201), the arc openings of the two arc-shaped racks (401) are arranged to face backward, the two arc-shaped guide rails (402) are fixed to the outer side surfaces of the two arc-shaped racks (401), the fan (406) is located in the arc openings of the two arc-shaped racks (401), the air outlet direction of the fan (406) is arranged to face backward, and the fan (406) is arranged to face the outer side surfaces of the two arc-shaped racks (401). A support rod (405) is fixedly connected to each of the two ends, the other ends of the two support rods (405) are fixedly connected to the two drive motors (404), the other ends of the two drive motors (404) are fixedly connected to a fixed seat (407), the inner side surfaces of the two fixed seats (407) are rotatably mounted with a set of clamping pulleys, the two sets of clamping pulleys are slidably clamped on the two arc-shaped guide rails (402), the two gear threes (403) are respectively mounted on the output shafts of the two drive motors (404), and the two gear threes (403) are respectively meshed with the two arc-shaped rack rails (401).

5. The wind-induced vibration analysis device for a large cantilevered multi-curved awning according to claim 2, characterized in that: A limiting rod (207) is fixedly connected between the two ends of the front support plate (202) and the rear support plate (214), and the two limiting rods (207) are respectively located directly below the two screw rods (206). The two movable seats (208) are respectively slidably connected to the two limiting rods (207).

6. The wind-induced vibration analysis device for a large cantilevered multi-curved awning according to claim 3, characterized in that: Limiting blocks (308) are respectively installed on the top ends of the two screw rods 2 (307).

7. The wind-induced vibration analysis device for a large cantilevered multi-curved awning according to claim 3, characterized in that: A vertical slide groove (318) is respectively provided at the inner end of the two movable seats (310), and a slider (311) is respectively fixed at both ends of the horizontal plate (312). The two sliders (311) at both ends of the horizontal plate (312) are respectively slidably connected in the vertical slide grooves (318) on the two movable seats (310).

8. The wind-induced vibration analysis device for a large cantilevered multi-curved awning according to claim 4, characterized in that: An anemometer (411) is installed at the air outlet of the fan (406).

9. The wind-induced vibration analysis device for a large cantilevered multi-curved awning according to claim 4, characterized in that: Each set of clamping pulleys includes two pairs of front and rear clamping pulleys, and the two pairs of clamping pulleys are respectively slidably clamped on the front and rear end surfaces of the arc guide rail (402); each pair of clamping pulleys includes a connecting column (409), the connecting column (409) is connected to the fixed seat (407), and the connecting column (409) is rotatably mounted with a pulley 1 (408) and a pulley 2 (410), and the pulley 1 (408) and the pulley 2 (410) are respectively rolling clamped on both sides of the end surface of the arc guide rail (402).

10. The wind-induced vibration analysis device for a large cantilevered multi-curved awning according to claim 4, characterized in that: A reinforcement plate (412) is fixedly connected between the top ends of the two arc-shaped rack rails (401).

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