A building vortex-induced vibration protection system based on information monitoring

Abstract

This invention discloses a building vortex-induced vibration protection system based on information monitoring, comprising a wind field monitoring device, a vortex-induced vibration monitoring device, a vortex-induced vibration folding baffle, and a back-end management terminal. The wind field monitoring system is used to monitor wind direction and speed changes around the tall structure in real time. The vortex-induced vibration monitoring device is used to monitor the occurrence of vortex-induced vibration in real time by detecting the building's vibration signals. The vortex-induced vibration folding baffle is installed on the outer surface of the tall structure. When or before vortex-induced vibration occurs, the back-end management terminal controls the deformation of the vortex-induced vibration folding baffle to change the geometric characteristics of the tall structure, thereby changing the natural frequency of the tall structure. After the vortex-induced vibration ends, the vortex-induced vibration folding baffle is restored to its initial state. This system can effectively protect against vortex-induced vibration.

Description

Technical Field

[0001] This invention relates to a vortex-induced vibration protection system for buildings with tall structures. Background Technology

[0002] On May 18, 2021, around noon, the SEG Plaza in Huaqiangbei, Shenzhen, experienced abnormal shaking. On May 19, 2021, the SEG Plaza shook again. Analysis revealed that specific wind conditions triggered vortex-induced resonance in the mast at the top of the building. Prolonged periods of stable wind conditions allowed the mast to continuously absorb energy from detached vortex excitation, which was then transmitted to the main building through the steel-concrete composite structure, leading to a high-order resonance response in the mast-building system. While this incident did not seriously threaten the lives of residents inside the building, it raised concerns about the building's safety. Following expert advice, the mast was removed. The building also lost the mast's original functions of lightning protection and navigational aids. Therefore, retaining the mast, while ensuring the building's safety, has significant practical implications. Summary of the Invention

[0003] Purpose of the invention: In view of the above-mentioned prior art, a building vortex-induced vibration protection system based on information monitoring is proposed, which can effectively protect against abnormal vibrations caused by vortex-induced vibration while preserving the tall structure.

[0004] Technical solution: A building vortex-induced vibration protection system based on information monitoring, wherein a tall structure is installed on the top of the building, including a wind field monitoring device, a vortex-induced vibration monitoring device, a turbulence folding baffle, and a back-end management terminal;

[0005] The wind field monitoring system is used to monitor the wind direction and speed around the tall structure at the top of the building in real time.

[0006] The vortex-induced vibration monitoring device is used to monitor the occurrence of vortex-induced vibration in real time by detecting the vibration signals of the building.

[0007] The turbulence-causing folding baffle is installed on the outer surface of the tall structure. When vortex-induced vibration occurs, the back-end management terminal controls the deformation of the turbulence-causing folding baffle to change the geometric characteristics of the tall structure, thereby changing the natural frequency of the tall structure. After the vortex-induced vibration ends, the turbulence-causing folding baffle is restored to its initial state.

[0008] Furthermore, the turbulence-causing folding baffle includes a mounting frame and several baffles arranged in sequence. The mounting frame and adjacent baffles, as well as each adjacent baffle, are connected by a rotating shaft. The turbulence-causing folding baffle is fixed to the outer surface of the towering structure by the mounting frame at the bottom. The length of each baffle in the height direction is halved from bottom to top, and the included angle between adjacent baffles varies between 0 degrees and 270 degrees. In the initial state, the turbulence-causing folding baffle is arranged vertically.

[0009] Furthermore, the turbulence-causing folding baffle is arc-shaped in the horizontal direction, with a central angle of 90 degrees for each individual turbulence-causing folding baffle. Four turbulence-causing folding baffles are arranged as a group and installed along the circumference of the tall structure.

[0010] Furthermore, the turbulence-causing folding baffle is made of a lightweight alloy.

[0011] Furthermore, multiple sets of the aforementioned turbulence-disrupting folding baffles are installed sequentially along the height direction of the towering structure.

[0012] Furthermore, the rotating shaft is driven by a lightweight motor located at the end of the shaft. The lightweight motor is either a stepper motor or a servo motor. The baffle maintains its posture after rotation by the damping of the rotating shaft and the combined action of the lightweight motor.

[0013] Furthermore, the turbulence-causing folding baffle includes a mounting frame and first to third baffles. The bottom mounting frame is connected to the lowest baffle and each adjacent baffle via first to third rotation shafts. When controlling the deformation of the turbulence-causing folding baffle to change the geometric characteristics of the tall structure and thus change the natural frequency of the tall structure, firstly, the first baffle is controlled to rotate 45° clockwise around the first rotation shaft, and the entire turbulence-causing folding baffle opens outward by 45°. If the vortex vibration monitoring device detects a decrease in vortex vibration, the first, second, and third baffles remain stationary. If the vortex vibration monitoring device detects no significant decrease in vortex vibration, the first to third baffles are controlled to rotate randomly around the rotation shaft until the vortex vibration monitoring device detects a decrease in vortex vibration, at which point the attitude of each baffle is maintained.

[0014] Furthermore, the system stores monitoring data from the wind field monitoring system for a period of time before and during the occurrence of vortex-induced vibration, as well as angle adjustment data of the turbulence folding baffle. When the data monitored in real time by the wind field monitoring system is similar to the stored historical data, the backend management terminal controls the turbulence folding baffle to automatically open according to the corresponding historical data.

[0015] Beneficial effects: 1. The turbulence folding plate can effectively change the geometric characteristics of tall structures (such as masts) to change their natural frequency and change the micro-wind field around the tall structure, thereby weakening or eliminating vortex-induced vibration. It can effectively avoid loss of life and property caused by vortex-induced vibration. The structure is simple, reliable and economical.

[0016] 2. By storing historical wind field conditions at and before the occurrence of vortex-induced vibration, when the data monitored in real time by the wind field monitoring system is similar to the stored historical data, the turbulence folding baffle can be opened automatically in a timely manner, which has good timeliness and practicality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall working procedure of the vortex vibration protection system of the present invention;

[0018] Figure 2 This is a schematic diagram of the wind farm monitoring system.

[0019] Figure 3 A schematic diagram of the initial state of a set of turbulence-inducing folding baffles;

[0020] Figure 4 A schematic diagram of the initial state of a single turbulence-causing folding baffle;

[0021] Figure 5 A schematic diagram of the working state of a single turbulence-disrupting folding baffle;

[0022] In the diagram: 1-Wind speed monitor, 2-Wind direction monitor, 3-Information transmission module, 4-Support frame, 5-Alarm, 6-Base, 7-First baffle, 8-Second baffle, 9-Third baffle, 10-First rotating shaft, 11-Second rotating shaft, 12-Third rotating shaft, 13-Mounting bracket, 14-Mounting hole, 15-Information transmission module. Detailed Implementation

[0023] The invention will now be further explained with reference to the accompanying drawings.

[0024] like Figure 1 As shown, a building vortex-induced vibration protection system based on information monitoring is applicable to situations where tall structures are installed on the top of a building. The system includes a wind field monitoring device, a vortex-induced vibration monitoring device, a turbulence folding baffle, and a back-end management terminal.

[0025] like Figure 2 As shown, the wind field monitoring system includes a wind speed monitor 1, a wind direction monitor 2, an information transmission module 3, a support frame 4, an alarm 5, and a base 6. The wind speed monitor 1, wind direction monitor 2, and alarm 5 are all mounted on the support frame 4, which in turn is mounted on the base 6. Several wind field monitoring systems are installed around the tall structure atop the building. Under normal operating conditions, the wind field monitoring system is operational 24 hours a day. The wind speed monitor 1 and wind direction monitor 2 monitor the wind direction and speed around the tall structure atop the building in real time. The monitoring data is transmitted to the information relay module via the information transmission module 3. The information relay module then transmits the wind field information to the data terminal and temporarily stores it.

[0026] The eddy vibration monitoring device includes several horizontal and tilt sensors mounted on the top of the building. These sensors are connected to an information relay module to transmit the building's vibration information to a data terminal.

[0027] like Figure 4As shown, the folding baffle is made of lightweight alloy and includes a mounting bracket 13, a first baffle 7, a second baffle 8, and a third baffle 9 arranged sequentially along the height of the towering structure. The bottom mounting bracket 13 is connected to the bottommost first baffle 7 via a first rotating shaft 10, the first baffle 7 and the second baffle 8 are connected via a second rotating shaft 11, and the second baffle 8 and the third baffle 9 are connected via a third rotating shaft 12. The included angle between adjacent baffles varies between 0 degrees and 270 degrees. The rotating shaft is driven by a lightweight motor located at the end of the shaft. This lightweight motor can be a stepper motor or a servo motor. The baffle maintains its posture after rotation through the damping of the rotating shaft and the combined action of the lightweight motor.

[0028] The length of each baffle in the height direction is halved from bottom to top; that is, the length of the second baffle 8 is half that of the first baffle 7, and the length of the third baffle 9 is half that of the second baffle 8. The turbulence-inducing folding baffles are arc-shaped in the horizontal direction, with a central angle of 90 degrees for each individual baffle. Four turbulence-inducing folding baffles form a group, and are anchored circumferentially along the outer side of the tall structure through the mounting holes 14 on the mounting bracket 13 at the bottom. Figure 3 As shown. Multiple sets of these turbulence-disrupting folding baffles can be sequentially installed along the height of the towering structure. In the initial state, the turbulence-disrupting folding baffles are arranged vertically.

[0029] When vortex-induced vibration occurs, the backend management terminal controls the deformation of the turbulence-induced folding baffle to change the geometric characteristics of the tall structure and thus change its natural frequency, and restores the turbulence-induced folding baffle to its initial state after the vortex-induced vibration ends.

[0030] Specifically, when vortex-induced vibration occurs, the horizontal and tilt sensors first detect the building's periodic swaying. Based on existing research on vortex-induced vibration, if the building's angular and horizontal displacement accelerations are relatively constant, but the swaying amplitude gradually increases without any attenuation, it can be determined that the building has experienced vortex-induced vibration. At this time, the data terminal transmits real-time wind field information to the back-end management terminal, which then sends a signal to the information transmission module 15 installed on the tall structure. After receiving the information, the information transmission module 15 first controls the first baffle 7 to rotate 45° clockwise around the first rotation axis 10, causing the entire turbulence-induced folding baffle to open outward by 45°. If the vortex-induced vibration monitoring device detects a decrease in vortex-induced vibration, the first baffle 7, the second baffle 8, and the third baffle 9 remain stationary. If the vortex-induced vibration monitoring device detects no significant decrease in vortex-induced vibration, it controls the first to third baffles 7-9 to rotate randomly around the rotation axis until the vortex-induced vibration monitoring device detects a decrease in vortex-induced vibration and maintains the attitude of each baffle. If, during the process, the sustained wind conditions change, causing the maintained attitude to no longer be able to reduce the building's abnormal vibrations, the rotation angles of each baffle are readjusted until the abnormal vibrations completely cease. After a period of time following the complete elimination of vortex-induced vibrations, the turbulence-folding baffles return to their initial state. This process alters the natural frequency of the tall structure by changing the baffle angles, thereby changing its geometric characteristics and causing it to deviate from its natural frequency. Simultaneously, the turbulence-folding baffles also alter the micro-wind field conditions around the tall structure.

[0031] During the duration of vortex-induced vibration, the angles between different baffles in each of the vortex-induced vibration folding baffles are transmitted to the data terminal for storage via signal transmission module 15. For historical vortex-induced vibration data, the monitoring data from the wind farm monitoring system for a period of time before the occurrence of vortex-induced vibration and the angle adjustment data of the vortex-induced vibration folding baffles are permanently stored on the data terminal. When the data monitored in real time by the wind farm monitoring system is similar to the stored historical data, the back-end management terminal controls the vortex-induced vibration folding baffles to automatically open according to the corresponding historical data, and at the same time controls the alarm 5 to sound a buzzer alarm. This means that vortex-induced vibration can be avoided as much as possible by changing the geometric characteristics of the tall structure before it occurs.

[0032] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A building vortex-induced vibration protection system based on information monitoring, wherein a tall structure is installed on the top of the building, characterized in that, Includes wind field monitoring devices, vortex vibration monitoring devices, turbulence folding baffles, and a back-end management terminal; The wind field monitoring device is used to monitor the wind direction and speed around the tall structure on the top of the building in real time. The vortex-induced vibration monitoring device is used to monitor the occurrence of vortex-induced vibration in real time by detecting the vibration signals of the building. The turbulence-reducing folding baffle is installed on the outer surface of the tall structure. When vortex-induced vibration occurs, the back-end management terminal controls the deformation of the turbulence-reducing folding baffle to change the geometric characteristics of the tall structure and thus change the natural frequency of the tall structure. After the vortex-induced vibration ends, the turbulence-reducing folding baffle is restored to its initial state. The turbulence-disrupting folding baffle includes a mounting frame and a first baffle, a second baffle, and a third baffle arranged in sequence. The mounting frame is connected to adjacent baffles and each adjacent baffle is connected by a rotating shaft. The turbulence-disrupting folding baffle is fixed to the outer surface of the tall structure by the mounting frame at the bottom. The length of each baffle in the height direction is halved from bottom to top, and the included angle between adjacent baffles varies between 0 degrees and 270 degrees. In the initial state, the turbulence-disrupting folding baffle is arranged vertically. The turbulence-disrupting folding baffle is arc-shaped in the horizontal direction, with a central angle of 90 degrees for each baffle. Four baffles are installed as a group along the circumference of the tall structure. The rotating shaft is driven by a lightweight motor located at the end of the shaft. The lightweight motor is either a stepper motor or a servo motor. The baffle maintains its posture after rotation by the damping of the rotating shaft and the combined action of the lightweight motor. When controlling the deformation of the turbulence-causing folding baffle, firstly, the first baffle is controlled to rotate 45° clockwise around the first rotation axis, and the entire turbulence-causing folding baffle opens outward by 45°. If the vortex vibration monitoring device detects a decrease in vortex vibration, the first, second, and third baffles remain stationary. If the vortex vibration monitoring device detects that the vortex vibration has not significantly decreased, the first to third baffles are controlled to rotate randomly around the rotation axis until the vortex vibration monitoring device detects a decrease in vortex vibration and maintains the posture of each baffle.

2. The building vortex-induced vibration protection system based on information monitoring according to claim 1, characterized in that, The turbulence-causing folding baffle is made of a lightweight alloy.

3. The building vortex-induced vibration protection system based on information monitoring according to claim 1, characterized in that, Multiple sets of the aforementioned turbulence-disrupting folding baffles are installed sequentially along the height direction of the towering structure.

4. The building vortex-induced vibration protection system based on information monitoring according to any one of claims 1-3, characterized in that, The system stores monitoring data from the wind field monitoring device for a period of time before and during the occurrence of vortex-induced vibration, as well as angle adjustment data of the turbulence folding baffle. When the data monitored in real time by the wind field monitoring device is similar to the stored historical data, the back-end management terminal controls the turbulence folding baffle to open automatically according to the corresponding historical data.

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