A high-rise building stability evaluation device based on Karmen vortex street effect design

Abstract

The invention discloses a high-rise building stability evaluation device based on the Karmen vortex effect design, comprising a wind collecting tube, a wind blade for adjusting the wind direction of the device is arranged at the upper end of the tail of the wind collecting tube, the outer wall of the wind collecting tube is wrapped by a permanent magnet, the permanent magnet is attached to the outer wall of the wind collecting tube and is located in the middle of the outer wall of the wind collecting tube, a flow divider is arranged at one end of the wind collecting tube away from the wind blade, a wind energy collection device is arranged at a position corresponding to the permanent magnet in the wind collecting tube, and the wind energy collection device comprises a protective shell, a rotating shaft and a rotating sheet. The invention belongs to the technical field of high-rise building stability evaluation, specifically a high-rise building stability evaluation device based on the Karmen vortex effect design that replaces an acceleration sensor and a wind load sensor of a super high-rise building, and solves the problems of sensors being easily damaged in harsh environments, high energy consumption, short life, and complex structure.

Description

Technical Field

[0001] The invention belongs to the technical field of high-rise building stability evaluation, and in particular relates to a high-rise building stability evaluation device designed based on the Karmen vortex street effect. Background Art

[0002] Modern high-rise buildings, especially those with a height of more than 300 meters, will sway slightly under strong winds. However, when the wind load exceeds the threshold, the following situations may occur:

[0003] Under the action of strong wind loads, the building sways to a certain extent, causing micro cracks in the partition walls, which has a certain impact on the stability of the main structure; due to long-term vibration, the structure changes its mechanical properties due to material fatigue and instability; decorations and glass curtain walls are strained due to the large local wind pressure; high-rise buildings are in a continuous swaying state, making residents feel uncomfortable and uneasy.

[0004] An effective way to solve this kind of problem is to quickly optimize the absorption and dissipation of vibration energy by TMD by measuring the wind speed. Under the existing technical conditions, the more mature and commonly used method is to use sensors to monitor the wind force outside the building in real time, and then the system transmits the information monitored by the sensor to the computer. The computer calculates the monitored information according to the pre-set calculation method to obtain the size of the control force, and finally generates the required control force through the external energy drive actuator and applies it to the building structure to stabilize the building.

[0005] Among them, acceleration sensors are currently the most commonly used sensors for dynamically monitoring the dynamics of super-high-rise structures. Anemometers and wind pressure gauges are sensors for monitoring wind loads. However, sensors are easily affected by temperature, and sensors are generally installed on the top of buildings. The temperature on the top of buildings may be high or low, and their sensitivity and accuracy will be affected by temperature changes and reduced. Although acceleration sensors have high precision, there are cumulative errors. As the working hours increase, the overall accuracy decreases significantly. The monitoring equipment is directly exposed to the outside world, and the relevant components of the wind monitoring equipment cannot be protected. It is easy to be damaged when encountering severe weather conditions. In addition, the sensors are comprehensively arranged, the overall cost is large, and there is a certain degree of maintenance difficulty.

[0006] In particular, the original monitoring structure dynamics and wind load sensors have a short lifespan, high cost, high energy consumption, and the wind detection device is directly exposed to the outside world, which cannot protect the key parts. When strong winds hit, the aging sensors will have large errors, resulting in a lag in TMD control; they are easy to damage and difficult to repair. Summary of the invention

[0007] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a high-rise building stability evaluation device designed based on the Karmen vortex street effect, which replaces the acceleration sensor and wind load sensor of the super high-rise building, solves the problems of the sensor being easily damaged in harsh environment, high energy consumption, short life, and complex structure, and is driven by external wind force to establish the magnitude of the current emitted by it as a criterion for evaluating the risk coefficient, and by constructing the relationship between the current and the wind speed, the wind speed under the corresponding current is obtained, and then the corresponding wind vibration acceleration is obtained. Combined with the relationship between the current and the change of the TMD structure and the preset program of the TMD system itself, the TMD mass block is adjusted to optimize the vibration reduction effect of the TMD, thereby achieving the purpose of improving the overall building strength. At the same time, the windward direction of the device can be automatically adjusted according to the wind direction to keep the front facing the wind.

[0008] The technical solution adopted by the present invention is as follows: a high-rise building stability evaluation device designed based on the Karmen vortex street effect, including a wind collection tube, a wind blade for adjusting the wind direction of the device is arranged at the upper end of the tail of the wind collection tube, the outer wall of the wind collection tube is wrapped by a permanent magnet, the permanent magnet is attached to the outer wall of the wind collection tube and is located in the middle of the outer wall of the wind collection tube, a flow divider is arranged at one end of the wind collection tube away from the wind blade, a wind energy collection device is arranged at a position corresponding to the permanent magnet in the wind collection tube, the wind energy collection device includes a protective shell, a rotating shaft and a rotating sheet, the rotating shaft rotates between the inner upper and lower walls of the wind collection tube corresponding to the permanent magnet position, the protective shell is fixed on the rotating shaft, the rotating sheet is fixed on the side wall of the protective shell, and the rotating sheet has a built-in wire.

[0009] Furthermore, the upper and lower ends of the rotating shaft are rotatably mounted on the upper and lower walls of the wind collecting tube through bearings.

[0010] Furthermore, the fan blades are semicircular.

[0011] Furthermore, it also includes an algorithm analysis and acquisition module, which is connected to the wind energy collection device in communication, and the algorithm analysis and acquisition module is connected to the TMD system in communication. The algorithm analysis and acquisition module uses the wind energy collection device to collect current signals, and collects data by conducting related similar experiments to find the wind speed corresponding to the current, and then converts and predicts the incoming data based on a model trained with a variety of machine learning algorithms of decision trees and random forests combined with the original data set recorded by the TMD system.

[0012] Furthermore, the wind energy collection device converts the wind force into an electrical signal to form a wind speed collection module that replaces the acceleration sensor and the wind load sensor.

[0013] After adopting the above structure, the beneficial effects of the present invention are as follows: a high-rise building stability evaluation device designed based on the Karmen vortex street effect proposed by the present invention has a simple structure, low energy consumption, long life, and is green and environmentally friendly; the wind force is converted into an electrical signal, and data is collected by conducting related similar experiments to find the wind speed corresponding to the current, and then a variety of machine learning algorithms such as decision trees and random forests are used. With the help of a model trained with the data set recorded by the original TMD system, the incoming data is converted and predicted by the analysis method; the device has a simple structure, is not prone to failure, and has a relatively low maintenance cost, and can maintain normal working conditions in harsh environments. A semicircular fan blade is designed at the tail of the device. When the wind speed direction is inconsistent with the axial direction of the device, a wind pressure torque will be generated to automatically adjust the direction to keep facing the wind. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0015] Figure 1 This is a schematic diagram of the overall structure of a high-rise building stability evaluation device designed based on the Karmen vortex street effect proposed by the present invention;

[0016] Figure 2 A schematic diagram of the structure of a wind energy collection device for a high-rise building stability evaluation device designed based on the Karmen vortex street effect proposed by the present invention;

[0017] Figure 3 for Figure 2 A magnified view of part A.

[0018] In the attached drawings: 1. Wind collecting tube, 2. Fan blades, 3. Permanent magnet, 4. Diverter, 5. Wind energy collecting device, 6. Protective shell, 7. Rotating shaft, 8. Rotating sheet, 9. Bearing. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0021] like Figure 1-3 As shown, a high-rise building stability evaluation device designed based on the Karmen vortex street effect includes a wind tube 1, a fan blade 2 for adjusting the wind direction of the device is arranged at the upper end of the tail of the wind tube 1, the fan blade 2 is semicircular, the outer wall of the wind tube 1 is wrapped by a permanent magnet 3, the permanent magnet 3 is attached to the outer wall of the wind tube 1 and is located in the middle of the outer wall of the wind tube 1, a flow divider 4 is arranged at one end of the wind tube 1 away from the fan blade 2, a wind energy collection device 5 is arranged at a position corresponding to the permanent magnet 3 in the wind tube 1, the wind energy collection device 5 includes a protective shell 6, a rotating shaft 7 and a rotating sheet 8, the upper and lower ends of the rotating shaft 7 are rotatably installed on the upper and lower walls of the wind tube 1 through bearings 9, the protective shell is fixed on the rotating shaft 7, the rotating sheet 8 is fixed on the side wall of the protective shell, and the rotating sheet 8 has a built-in wire.

[0022] The device also includes an algorithm analysis and acquisition module, which is connected to the wind energy collection device in communication, and the algorithm analysis and acquisition module is connected to the TMD system in communication. The algorithm analysis and acquisition module uses the wind energy collection device to collect current signals, and collects data by conducting related similar experiments to find the wind speed corresponding to the current, and then converts and predicts the incoming data according to the model trained by the decision tree and random forest machine learning algorithms combined with the original TMD system data set. The device has a long service life, low energy consumption, and can generate electricity independently; the wind force is converted into an electrical signal, and the wind speed corresponding to the current can be found by conducting related similar experiments to collect data. Using decision trees, random forests and other machine learning algorithms, a model of the relationship between the ratio of wind vibration acceleration to TMD's own acceleration and the TMD vibration reduction effect is constructed, and the model is trained and adjusted by the data collected by the original TMD system to obtain the final model, and it is imported into the single-chip microcomputer circuit board in the TMD system. Then, the single-chip microcomputer circuit board obtains a preliminary adjustment plan based on the imported data and the imported model, starts the driving device to change the mass of the TMD mass block, and then makes further adjustments based on the actual effect with the help of the preset program of the TMD system itself, ultimately achieving the best vibration reduction effect; the device has a simple structure, is not prone to failure, has a relatively low maintenance cost, and can maintain normal working conditions in harsh environments. At the same time, it can automatically adjust the direction of the windward side of the device according to the wind direction to keep it facing the wind.

[0023] Preferably, the wind energy collection device converts the wind force into an electrical signal to form a wind speed collection module that replaces the acceleration sensor and the wind load sensor. The wind force is converted into an electrical signal, and a decision tree, random forest, deep neural network and other machine learning algorithms are used to convert the incoming data and perform a predictive analysis method. The device has a simple structure, is not prone to failure, has a relatively low maintenance cost, and can maintain normal working conditions in harsh environments.

[0024] When in use, a semicircular fan blade 2 is designed at the tail of the device. When the wind speed direction is inconsistent with the axial direction of the device, a wind pressure moment will be generated to automatically adjust the direction to keep facing the wind.

[0025] When the outdoor wind flow meets the device, if the windward side is inconsistent with the wind flow direction, the wind blade 2 at the tail will generate a wind pressure torque due to the inconsistent wind pressure on both sides, driving the device to rotate with a fixed axis until the windward side is consistent with the wind flow direction. When the wind flow enters the wind collection barrel, it will first generate an alternating wind vortex behind the diverter 4 under the action of the diverter 4. When the vortex passes through the wind energy collection device 5, due to the wind pressure difference between the side with the vortex and the side without the vortex, the rotating piece 8 is driven to swing continuously at a certain frequency, and the built-in wire of the rotating piece 8 and the magnetic field generated by the permanent magnet 3 produce relative displacement, thereby generating current. The magnitude of the wind force is proportional to the magnitude of the current. By using a variety of machine learning algorithms such as decision trees and random forests, the incoming data is converted and predicted by using a model trained with data recorded by the original TMD system. Thus, a preliminary TMD adjustment plan is obtained, the drive device is started to change the mass of the TMD mass block, and then further adjustments are made based on the actual effect and the preset program of the TMD system itself, so as to finally achieve the best vibration reduction effect and maintain the stability of the building.

[0026] In addition, the device of the present invention has a simple structure, simple installation and disassembly, and is easy to maintain, which can greatly reduce the time and energy spent on maintenance; in response to the hysteresis and complexity of current wind load sensors, the present invention proposes a new solution and proposes a detection method for converting wind loads using electromagnetic effects; in response to the problem that existing complex devices are directly exposed to the outside world and are easily damaged, this patent designs a new device, which overcomes the existing problems through a simple structure and sufficient material strength; and the present invention is easier to implement than existing facilities and has a higher promotion value.

[0027] Although the embodiments of the present invention have been shown and described, it is understood 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 present invention, and the scope of the present invention is defined by the appended claims and their equivalents. In short, if those skilled in the art are inspired by them and design structural modes and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they shall all fall within the scope of protection of the present invention.

Claims

1. A high-rise building stability evaluation device based on Karmen vortex street effect design, Features: It includes a wind collection tube, wherein a wind blade for adjusting the wind direction of the device is arranged at the upper end of the tail of the wind collection tube, the outer wall of the wind collection tube is wrapped by a permanent magnet, the permanent magnet is attached to the outer wall of the wind collection tube and is located in the middle of the outer wall of the wind collection tube, a diverter is arranged at the end of the wind collection tube away from the wind blade, a wind energy collection device is arranged at a position corresponding to the permanent magnet in the wind collection tube, and the wind energy collection device includes a protective shell, a rotating shaft and a rotating sheet, the rotating shaft rotates between the inner upper and lower walls of the wind collection tube corresponding to the position of the permanent magnet, the protective shell is fixed on the rotating shaft, the rotating sheet is fixed on the side wall of the protective shell, and the rotating sheet has a built-in wire.

2. A high-rise building stability evaluation device based on Karmen vortex effect design according to claim 1, Features: The upper and lower ends of the rotating shaft are rotatably mounted on the upper and lower walls of the wind collecting tube through bearings.

3. A high-rise building stability evaluation device based on Karmen vortex effect design according to claim 1, Features: The fan blades are semicircular.

4. A high-rise building stability evaluation device based on Karmen vortex street effect design according to claim 1, Features: It also includes an algorithm analysis and acquisition module, which is communicatively connected to the wind energy collection device, and the algorithm analysis and acquisition module is communicatively connected to the TMD system. The algorithm analysis and acquisition module uses the wind energy collection device to collect current signals, and collects data by conducting related similar experiments to find the wind speed corresponding to the current, and then converts and predicts the incoming data based on a model trained with a variety of machine learning algorithms of decision trees and random forests combined with the original data set recorded by the TMD system.

5. The high-rise building stability evaluation device based on Karmen vortex street effect design according to claim 1, Features: The wind energy collection device converts the wind force into an electrical signal to form a wind speed collection module that replaces an acceleration sensor and a wind load sensor.

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