Chain ring type pneumatic control device and control method for steel tube tower rod piece

Abstract

The invention discloses a chain ring type pneumatic control device and a control method for a steel tube tower rod piece, and belongs to the technical field of power equipment.The chain ring type pneumatic control device for the steel tube tower rod piece comprises a chain ring and an identification system, the rod piece is sleeved with the chain ring, and the identification system is arranged in the chain ring; the recognition system comprises an acceleration sensor, an anemometer and a background computer, the acceleration sensor is attached to the rod piece, the vibration peak frequency fv0 of the rod piece is confirmed through the acceleration sensor, the anemometer is arranged on the peripheral face of the chain ring, the environment wind speed U is detected through the anemometer, and the vortex shedding frequency f is obtained through calculation; both the acceleration sensor and the anemometer can send signals to the background computer, the background computer compares the peak frequency fv0 with the vortex shedding frequency f to confirm a dominant frequency component fv, and the background computer presets the structural natural vibration frequency fn and an adaptive threshold value belonging to adapt, when fv-fnlt; when the number belongs to adapt, it is judged that a resonance risk exists, and the background computer gives an alarm; vibration is suppressed through the chain ring and is monitored through the recognition system.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment, and in particular to a chain-ring type pneumatic control device and a control method for a steel pipe tower member. Background Art

[0002] With the rapid development of my country's economy, electricity demand has increased dramatically, leading to a growing demand for large-capacity, long-distance power transmission. Therefore, ultra-high voltage transmission towers, which have the advantages of large capacity and long-distance transmission, are increasingly being used. As power facilities for important lifeline projects, ultra-high voltage steel tube towers are usually characterized by high poles, large spans, and strong elasticity. However, these characteristics also make ultra-high voltage steel tube towers typical tall and wind-sensitive structures, which makes them extremely prone to breeze vibration, especially for key flexible components. Long-term breeze vibration can frequently cause problems such as fatigue damage to pole components, cracking of node plates, or loosening of bolts, seriously endangering the operational safety of transmission lines.

[0003] At present, existing vibration control devices have poor vibration reduction effects and low safety. At the same time, they are unable to monitor the vibration suppression effect and the risk of rod resonance. When extreme weather and conditions make it difficult for the vibration control device to suppress vibration, they are unable to remind staff, resulting in low operation and maintenance efficiency, causing large-scale damage to rods. At the same time, the thresholds of some resonance monitoring devices cannot be adaptively adjusted according to the environment and rod status, which has limitations, and the resonance risk detection accuracy is low and the safety is low. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a chain-link pneumatic control device for UHV steel tubular tower members, based on modifying the flow field characteristics of airflow through the flexible, slender members of the steel tubular tower. By adding an aerodynamic turbulence device and a vibration monitoring module, this device achieves vibration suppression and resonance warning for the flexible, slender members. This device utilizes lightweight materials and does not increase the load on the flexible members. It not only addresses the vibration problem of the UHV steel tubular tower members in light breezes, but also automatically identifies vortex-induced vibrations through an adaptive algorithm, improving operational stability.

[0005] The present invention adopts the following technical solutions.

[0006] The present invention discloses a chain-type pneumatic control device for a steel pipe tower rod, comprising: ... v0 The anemometer is set on the outer surface of the chain link. The vortex shedding frequency f is calculated by detecting the ambient wind speed U. The acceleration sensor and the anemometer can send signals to the background computer, and the background computer compares the peak frequency f v0The vortex shedding frequency f confirms the main frequency component f v , the background computer presets the structure natural frequency f n and adaptive threshold ∈ adapt , when |f v -f n |<∈ adapt When it is determined that there is a risk of resonance, the background computer will issue an alarm to alert the surrounding

[0007] Preferably, the acceleration sensor is set to a sampling rate f s The vibration acceleration of the rod at the position is collected using a time length T, and the vibration acceleration data is transmitted to the background computer. The background computer pre-processes the collected acceleration signal, converts the pre-processed acceleration signal into a spectrum through Fourier transform, and extracts the peak frequency f in the spectrum. v0 .

[0008] Preferably, the anemometer is preset with the same sampling rate f as the acceleration sensor s The time length T is used to ensure alignment with the time domain signal of the spectrum and transmit the ambient wind speed U to the background computer. The background computer preprocesses the ambient wind speed U data and calculates the vortex shedding frequency f through the preprocessed wind speed data. The vortex shedding frequency f conforms to the formula:

[0009]

[0010] Where D is the rod diameter, St is the Strouhal number determined by experimental analysis;

[0011] When the peak frequency f v0 is equal to the vortex shedding frequency f, then verify the peak frequency f v0 The main frequency component f v , judge that the recognition system is operating normally; when the peak frequency f v0 is not equal to the vortex shedding frequency f, then the peak frequency f v0 Not the main frequency component f v , it is judged that there is interference in the recognition system and correction is required.

[0012] Preferably, the structural natural frequency f n According to the formula:

[0013]

[0014] Where k is the equivalent mass coefficient, obtained by mode integration; m1 is the distributed mass of the member, m1 = ρAL, ρ is the member density, A is the cross-sectional area of ​​the member; L is the effective length of the cantilever section of the member; m2 is the additional concentrated mass at the upper end of the member;

[0015] E is the elastic modulus of the material, which is determined by the material of the rod;

[0016] I is the cross-sectional moment of inertia of the member, determined by the geometric parameters of the member.

[0017] Preferably, the adaptive threshold ∈ adapt According to the formula:

[0018] ∈ adapt =ασ f +βζf n

[0019] where α f is the spectrum standard deviation, ζ is the member damping ratio, which is determined by specifications and experimental analysis; α is the frequency discrete weight coefficient, and β is the damping weight coefficient, which is determined by experimental testing and historical data fitting.

[0020] Preferably, the σ f According to the formula:

[0021]

[0022] Among them, f i is the frequency value of the i-th frequency component in the spectrum; is the frequency mean, that is By σ f Reflects the discreteness of the spectrum, and then dynamically adjusts the adaptive threshold ∈ adapt .

[0023] Preferably, the chain link includes: a fixing module and a connecting piece, the fixing module is chamfered at four corners and an elliptical hollow air inlet hole is set in the middle, and the four corners of the connecting piece are connected end to end with the elliptical hollow air inlet hole on the fixing module through buckles.

[0024] Preferably, a plurality of hollow circular holes are provided in the connecting member, and the two ends of the hollow circular holes are connected and communicated with the elliptical hollow air inlet hole. When the airflow flows into the elliptical hollow air inlet hole, it will be blocked by the rod and flow into the hollow circular hole from both sides of the elliptical hollow air inlet hole. The airflow is ejected from the other end of the hollow circular hole into another elliptical hollow air inlet hole, blocking the external airflow.

[0025] The present invention also discloses a control method for a chain-link type pneumatic control device for a steel tube tower member, based on the chain-link type pneumatic control device for a steel tube tower member, comprising the following steps:

[0026] The chain link is placed on the rod to suppress vibration, and the identification system is used to monitor vortex-induced vibration; the background computer presets the structural natural frequency f n and adaptive threshold ∈ adapt ,

[0027] The acceleration sensor confirms the peak frequency f of the rod vibration v0 , the anemometer detects the ambient wind speed U and calculates the vortex shedding frequency f;

[0028] Compare the peak frequency f v0 The vortex shedding frequency f confirms the main frequency component f v , when |f v -f n |<∈ adapt When it is determined that there is a risk of resonance, the background computer will issue an alarm to alert the surrounding

[0029] Preferably, the acceleration sensor confirms the peak frequency f of the rod vibration v0 , the anemometer detects the ambient wind speed U and calculates the vortex shedding frequency f; comprising the following steps:

[0030] The acceleration sensor is sampled at a preset rate f s and using a time length T to collect the vibration acceleration of the rod at the location, and transmitting the vibration acceleration data to the background computer;

[0031] The background computer pre-processes the collected acceleration signal, converts the pre-processed acceleration signal into a spectrum through Fourier transform, and extracts the peak frequency f of the vibration in the spectrum. v0 ;

[0032] The anemometer is preset to the same sampling rate f as the accelerometer s The time length T is adopted and the ambient wind speed U is transmitted to the background computer, which preprocesses the ambient wind speed U data and calculates the vortex shedding frequency f.

[0033] The beneficial effect of the present invention is that, compared with the prior art,

[0034] The present invention uses the coordination of an elliptical hollow air inlet and a hollow circular hole to redirect airflow and generate a jet, effectively discretizing the shedding frequency of the Karman vortex street and preventing resonant locking. The nonlinear interference between the micro-jets and the main vortex ring reduces the peak turbulent kinetic energy in the wake region, delaying flow separation. Simultaneously, airflow exits the hollow circular hole to form a virtual aerodynamic shield, directional-correcting the flow path in the main wind direction and weakening the unsteady component of fluctuating lift in the crosswind direction. This synergistic effect reduces the Strouhal number at this location on the member, improving the vibration suppression capability of the steel tube tower member.

[0035] The present invention monitors the vortex-induced vibration frequency in real time through the recognition system and confirms the peak frequency f of the rod vibration through the acceleration sensor. v0 At the same time, the wind speed U measured by the anemometer is used to calculate the vortex shedding frequency f, and the peak frequency f is compared v0 The vortex shedding frequency f determines the main frequency component f v , and judge whether the recognition system is operating normally; improve the reliability and security of the recognition system operation, avoid data errors; at the same time, the adaptive threshold ∈ adaptBy jointly confirming the spectral standard deviation and damping ratio, the resonance risk threshold can be adaptively and dynamically adjusted according to the vibration status of multiple rods, which is more adaptable to complex environments and improves operation and maintenance efficiency; avoids the limitations of fixed thresholds and significantly improves the accuracy and reliability of resonance detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a first structural diagram of the present invention;

[0037] Figure 2 is a second structural diagram of the present invention;

[0038] In the figure: 1. Fixing module; 2. Hollow circular hole; 3. Oval hollow air inlet hole; 4. Chamfer; 5. Buckle; 6. Connector; 7. Chain link. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without making creative efforts are all within the scope of protection of the present invention.

[0040] like Figure 1 As shown, the present invention provides a chain-link pneumatic control device for a steel pipe tower member, which includes: a fixing module 1 and a connecting member 6. The fixing module 1 is a rectangular parallelepiped structure, and symmetrical chamfers 4 are set at the four corners of the fixing module 1. The chamfers 4 are forty-five degrees and are in the shape of a circular arc. At the same time, an elliptical hollow air inlet hole 3 is set in the middle of the fixing module 1; multiple fixing modules 1 are connected to the connecting member 6 through buckles 5, and buckles 5 are set at the four corners of the connecting member 6. The four corners of the connecting member 6 are connected to the elliptical hollow air inlet holes 3 on the multiple fixing modules 1 through the buckles 5. A plurality of horizontal hollow circular holes 2 are set inside the connecting member 6, and the two ends of the hollow circular holes 2 are connected and communicated with the elliptical hollow air inlet holes 3.

[0041] Multiple fixing modules 1 and connectors 6 are connected end to end through buckles 5 to form a chain link 7. The chain link 7 is sleeved on the rod body. At the same time, the buckle 5 is a silicone cushion to prevent the rigid connection from causing damage to the equipment under wind vibration.

[0042] Preferably, the present invention is installed on a key flexible rod of a tower with a slenderness ratio greater than one hundred and twenty.

[0043] In a specific embodiment: the fixing module 1 and the connecting member 6 are connected end to end by the buckle 5 and fixed to the wind-vibration-sensitive part of the steel pipe tower rod, that is, the part with the largest vortex-induced vibration amplitude. When one side of the rod is subjected to external wind load, the airflow in the main wind direction flows into the elliptical hollow air inlet 3 and is blocked by the rod. The airflow flows into the hollow circular hole 2 from both sides of the elliptical hollow air inlet 3, and then is ejected from the other end of the hollow circular hole 2 to the other elliptical hollow air inlet 3. The airflow on both sides of the main wind direction is blocked by the impact, which reduces the intensity of the vortex shedding frequency of the rod and breaks the original vortex structure. In the initial formation stage of Karman vortex excitation, the jet directly interferes with the unstable fluctuation of the shear layer, suppresses the aggregation of large-scale vortices and delays the critical wind speed for the vortex core to fall off in pairs, reduces the resonant wind direction and the vortex-induced vibration amplitude, and improves the structural stability.

[0044] The present invention proposes a chain-link pneumatic control device for steel tubular tower members. Through the coordination of elliptical hollow air inlets (3) and hollow circular holes (2), the device alters airflow direction, disrupts the symmetry of established periodic vortices, and discretizes the vortex shedding frequency. The airflow ejected from the elliptical hollow air inlets (3) on either side of the main wind direction through multiple hollow circular holes (2) accelerates the boundary layer flow of the member, delays flow separation, and reduces the intensity of the tail vorticity, thereby lowering pressure differential drag. Simultaneously, the airflow ejected from the hollow circular holes (2) forms a virtual aerodynamic shield, directional-correcting the main wind direction flow path and weakening the unsteady component of the fluctuating lift in the crosswind direction. This synergistic effect reduces the Strouhal number at this location on the member, enhancing the vibration suppression capability of the steel tubular tower member.

[0045] The chain link 7 of the vortex-induced vibration control device for the steel tube tower rod has a built-in identification system, which includes: an acceleration sensor, an anemometer and a background computer. The acceleration sensor is attached to the steel tube tower rod and is used to monitor the vibration acceleration generated by the rod. The anemometer is set on the outer peripheral surface of the chain link 7, and the anemometer is used to detect the ambient wind speed to which the chain link 7 is subjected. Both the acceleration sensor and the anemometer can send signals to the background computer. The staff monitors the vortex-induced vibration conditions of the steel tube tower rod and the vibration suppression effect of the control device in real time through the background computer. When it is identified that the vortex-induced vibration frequency data of the rod is abnormal and there is a risk of resonance, the background computer will send a warning signal to remind the staff to intervene.

[0046] The acceleration sensor is set to a sampling rate f s The acceleration sensor collects the vibration acceleration of the steel pipe tower member at the location and transmits the vibration acceleration data to the background computer. The background computer pre-processes the collected acceleration signal and converts the pre-processed acceleration signal into a spectrum through Fourier transform (FFT). The peak frequency f of the vibration in the spectrum is extracted. v0 ;

[0047] Preferably, the sampling rate f of the acceleration sensor sThe adoption time T can be adaptively adjusted according to actual usage needs.

[0048] The present invention verifies the peak frequency f by anemometer v0 Is it the main frequency component f v , ensure the reliability of data and avoid misjudgment of frequency,

[0049] The anemometer is preset with the same sampling rate f as the acceleration sensor. s The time length T is used to ensure alignment with the time domain signal of the spectrum. The anemometer collects the ambient wind speed U of the pole at the location and transmits the data of the ambient wind speed U to the background computer. The background computer pre-processes the wind speed data and calculates the vortex shedding frequency f. The vortex shedding frequency f conforms to the formula:

[0050]

[0051] Where D is the rod diameter, is a constant, and St is the Strouhal number determined by experimental analysis;

[0052] When the peak frequency f v0 is approximately equal to the vortex shedding frequency f, then verify the peak frequency f v0 The main frequency component f v , judge that the recognition system is operating normally; when the peak frequency f v0 The peak frequency f is significantly different from the vortex shedding frequency f. v0 Not the main frequency component f v , it is determined that there is interference in the recognition system and correction is required.

[0053] At the same time, the background computer sets the structural natural vibration frequency f of the steel pipe tower member in advance. n , the natural frequency of the structure f n According to the formula:

[0054]

[0055] Among them, k is the equivalent stiffness, and the rod is a cantilever beam structure with free end load. E is the elastic modulus of the material, which is a constant determined by the material of the rod; I is the cross-sectional inertia moment of the rod, which is a constant determined by the geometric parameters of the rod; L is the effective length of the cantilever section of the rod;

[0056] At the same time, M is the equivalent mass, M=km1+m2, km1 is the equivalent distribution mass of the rod, k is the equivalent mass coefficient, obtained by the vibration mode integration of the cantilever beam; m1=ρAL, ρ is the rod density, A is the cross-sectional area of ​​the rod, and m2 is the concentrated mass of the accessories at the free end of the rod, such as the mass of the tower structure or wire set at the upper end of the rod.

[0057] Therefore, the natural frequency of the structure f nAccording to the formula:

[0058]

[0059] In addition, the background computer sets the adaptive threshold ∈ adapt , when |f v -f n |<∈ adapt If a resonance risk is detected, the background computer will issue an alarm to remind the staff to intervene;

[0060] The adaptive threshold ∈ adapt According to the formula:

[0061] ∈ adapt =ασ f +βζf n

[0062] where σ f is the spectrum standard deviation and conforms to the formula, f i is the frequency value of the i-th frequency component in the spectrum; is the frequency mean, that is By σ f Reflects the discreteness of the spectrum, and then dynamically adjusts the adaptive threshold ∈ adapt .

[0063] ζ is the member damping ratio, which is determined by specifications and experimental analysis and can be adaptively adjusted;

[0064] α is the frequency discrete weight coefficient, and β is the damping weight coefficient, which are determined through experimental testing and historical data fitting and can be adaptively adjusted.

[0065] The recognition system of the present invention confirms the peak frequency f of the vibration of the rod through the acceleration sensor v0 At the same time, the wind speed U measured by the anemometer is used to calculate the vortex shedding frequency f, and the peak frequency f is compared v0 The vortex shedding frequency f determines the main frequency component f v , and judge whether the recognition system is operating normally; improve the reliability and security of the recognition system operation, avoid data errors; at the same time, the background computer sets the structural natural frequency f in advance n and adaptive threshold ∈ adapt , when |f v -f n |<∈ adapt When the resonance risk is detected, a warning is issued to the people around. adapt Adaptive dynamic adjustment of the resonance risk threshold based on the vibration state of the rod is achieved, making it more adaptable to complex environments and improving operation and maintenance efficiency;

[0066] The present invention also discloses a control method for a chain-ring type pneumatic control device for a steel pipe tower member, comprising the following steps:

[0067] Step 1: Put the chain link 7 on the rod to suppress vibration, and the identification system performs vortex-induced vibration monitoring; the background computer presets the structural natural frequency f n and adaptive threshold ∈ adapt ,

[0068] Step 2: Use the accelerometer to confirm the peak frequency f of the rod vibration v0 , the anemometer detects the ambient wind speed U and calculates the vortex shedding frequency f;

[0069] Step 2.1: The accelerometer is sampled at a preset rate f s and using a time length T to collect the vibration acceleration of the rod at the location, and transmitting the vibration acceleration data to the background computer;

[0070] Step 2.2: The background computer pre-processes the collected acceleration signal, converts the pre-processed acceleration signal into a spectrum through Fourier transform, and extracts the peak frequency f of the vibration in the spectrum. v0 ;

[0071] Step 2.3: Set the anemometer to the same sampling rate f as the accelerometer s The time length T is adopted and the ambient wind speed U is transmitted to the background computer, which pre-processes the ambient wind speed U data and calculates the vortex shedding frequency f;

[0072] Step 3: Compare the peak frequency f v0 The vortex shedding frequency f confirms the main frequency component f v , when |f v -f n |<∈ adapt When it is determined that there is a risk of resonance, the background computer will issue an alarm to alert the surrounding

[0073] The beneficial effect of the present invention is that, compared with the prior art,

[0074] The present invention uses the coordination of an elliptical hollow air inlet and a hollow circular hole to redirect airflow and generate a jet, effectively discretizing the shedding frequency of the Karman vortex street and preventing resonant locking. The nonlinear interference between the micro-jets and the main vortex ring reduces the peak turbulent kinetic energy in the wake region, delaying flow separation. Simultaneously, airflow exits the hollow circular hole to form a virtual aerodynamic shield, directional-correcting the flow path in the main wind direction and weakening the unsteady component of fluctuating lift in the crosswind direction. This synergistic effect reduces the Strouhal number at this location on the member, improving the vibration suppression capability of the steel tube tower member.

[0075] The present invention monitors the vortex-induced vibration frequency in real time through the recognition system and confirms the peak frequency f of the rod vibration through the acceleration sensor.v0 At the same time, the wind speed U measured by the anemometer is used to calculate the vortex shedding frequency f, and the peak frequency f is compared v0 The vortex shedding frequency f determines the main frequency component f v , and judge whether the recognition system is operating normally; improve the reliability and security of the recognition system operation, avoid data errors; at the same time, the adaptive threshold ∈ adapt By jointly confirming the spectral standard deviation and damping ratio, the resonance risk threshold can be adaptively and dynamically adjusted according to the vibration status of multiple rods, which is more adaptable to complex environments and improves operation and maintenance efficiency; avoids the limitations of fixed thresholds and significantly improves the accuracy and reliability of resonance detection.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A chain-link pneumatic control device for a steel pipe tower member, comprising: Chain link (7) and identification system, characterized in that: The chain link (7) is mounted on the rod and has a built-in identification system, which includes an acceleration sensor, an anemometer and a background computer. The acceleration sensor is attached to the rod and the peak frequency f of the vibration of the rod is confirmed by the acceleration sensor. v0 The anemometer is set on the outer surface of the chain link (7), and the vortex shedding frequency f is calculated by detecting the ambient wind speed U through the anemometer. The acceleration sensor and the anemometer can send signals to the background computer, and the background computer compares the peak frequency f v0 The vortex shedding frequency f confirms the main frequency component f v , the background computer presets the structure natural frequency f n and adaptive threshold ∈ adapt , when |f v -f n |<∈ adapt When it is determined that there is a risk of resonance, the background computer will issue an alarm to alert the surrounding 2. The chain-link pneumatic control device for a steel pipe tower member according to claim 1, characterized in that: The acceleration sensor is set to a sampling rate f s The vibration acceleration of the rod at the position is collected using a time length T, and the vibration acceleration data is transmitted to the background computer. The background computer pre-processes the collected acceleration signal, converts the pre-processed acceleration signal into a spectrum through Fourier transform, and extracts the peak frequency f in the spectrum. v0 .

3. The chain-link pneumatic control device for a steel pipe tower member according to claim 2, characterized in that: The anemometer is preset to have the same sampling rate f as the acceleration sensor. s The time length T is used to ensure alignment with the time domain signal of the spectrum and transmit the ambient wind speed U to the background computer. The background computer preprocesses the ambient wind speed U data and calculates the vortex shedding frequency f through the preprocessed wind speed data. The vortex shedding frequency f conforms to the formula: Where D is the rod diameter, St is the Strouhal number determined by experimental analysis; When the peak frequency f v0 is equal to the vortex shedding frequency f, then verify the peak frequency f v0 The main frequency component f v , judge that the recognition system is operating normally; when the peak frequency f v0 is not equal to the vortex shedding frequency f, then the peak frequency f v0 Not the main frequency component f v , it is judged that there is interference in the recognition system and correction is required.

4. The chain-link pneumatic control device for a steel pipe tower member according to claim 1, characterized in that: The structural natural frequency f n According to the formula: Where k is the equivalent mass coefficient, obtained by mode integration; m1 is the distributed mass of the member, m1 = ρAL, ρ is the member density, A is the cross-sectional area of ​​the member; L is the effective length of the cantilever section of the member; m2 is the additional concentrated mass at the upper end of the member; E is the elastic modulus of the material, which is determined by the material of the rod; I is the cross-sectional moment of inertia of the member, determined by the geometric parameters of the member.

5. The chain-link pneumatic control device for a steel pipe tower member according to claim 1, characterized in that: The adaptive threshold ∈ adapt According to the formula: ∈ adapt =as f +bzf n where σ f is the spectrum standard deviation, ζ is the member damping ratio, which is determined by specifications and experimental analysis; α is the frequency discrete weight coefficient, and β is the damping weight coefficient, which is determined by experimental testing and historical data fitting.

6. The chain-link pneumatic control device for a steel pipe tower member according to claim 5, characterized in that: The σ f According to the formula: Among them, f i is the frequency value of the i-th frequency component in the spectrum; is the frequency mean, that is By σ f Reflects the discreteness of the spectrum, and then dynamically adjusts the adaptive threshold ∈ adapt .

7. The chain-link pneumatic control device for a steel pipe tower member according to claim 1, characterized in that: The chain link (7) comprises: a fixing module (1) and a connecting piece (6); the fixing module (1) is provided with chamfers (4) at four corners and an elliptical hollow air inlet hole (3) is provided in the middle; the four corners of the connecting piece (6) are connected end to end with the elliptical hollow air inlet hole (3) on the fixing module (1) via buckles (5).

8. The chain-link pneumatic control device for a steel pipe tower member according to claim 7, characterized in that: A plurality of hollow circular holes (2) are provided in the connecting member (6), and both ends of the hollow circular holes (2) are connected and communicated with the elliptical hollow air inlet hole (3). When airflow flows into the elliptical hollow air inlet hole (3), it will be blocked by the rod and flow into the hollow circular hole (2) from both sides of the elliptical hollow air inlet hole (3). The airflow is ejected from the other end of the hollow circular hole (2) into another elliptical hollow air inlet hole (3), thereby blocking the external airflow.

9. A control method for a chain-link type pneumatic control device for a steel tube tower member, based on the chain-link type pneumatic control device for a steel tube tower member according to any one of claims 1 to 8, characterized in that: The chain link (7) is placed on the rod to suppress vibration, and the identification system performs vortex-induced vibration monitoring; the background computer presets the structural natural frequency f n and adaptive threshold ∈ adapt ; The acceleration sensor confirms the peak frequency f of the rod vibration v0 , the anemometer detects the ambient wind speed U and calculates the vortex shedding frequency F; Compare the peak frequency f v0 The vortex shedding frequency f confirms the main frequency component f v , when |f v -f n |<∈ adapt When it is determined that there is a risk of resonance, the background computer will issue an alarm to alert the surrounding 10. The control method of the chain-link type pneumatic control device for a steel pipe tower member according to claim 9, characterized in that: The acceleration sensor determines the peak frequency f of the rod vibration v0 , the anemometer detects the ambient wind speed U and calculates the vortex shedding frequency f; The following steps are involved: The acceleration sensor is sampled at a preset rate f s and using a time length T to collect the vibration acceleration of the rod at the location, and transmitting the vibration acceleration data to the background computer; The background computer pre-processes the collected acceleration signal, converts the pre-processed acceleration signal into a spectrum through Fourier transform, and extracts the peak frequency f of the vibration in the spectrum. v0 ; The anemometer is preset to the same sampling rate f as the accelerometer s The time length T is adopted and the ambient wind speed U is transmitted to the background computer, which preprocesses the ambient wind speed U data and calculates the vortex shedding frequency f.

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