CN-121993542-A - Bidirectional vibration reduction tuned mass damper for tower and vibration control method

CN121993542ACN 121993542 ACN121993542 ACN 121993542ACN-121993542-A

Abstract

The invention provides a bidirectional vibration reduction tuned mass damper for a tower and a vibration control method. The damper comprises a damper mounting frame, a moving mass block, a magnetic suspension damping assembly, an eddy current damping assembly, two groups of elastic restoring assemblies and two groups of horizontal guide assemblies which are arranged in a crossed and layered mode, wherein the damper mounting frame is mounted at the top end of a tower, the moving mass block can be mounted in the damper mounting frame in a multidirectional horizontal moving mode through the horizontal guide assemblies and is mounted in a suspended mode through the magnetic suspension damping assembly arranged in the horizontal guide assemblies, the eddy current damping assembly is integrally mounted in the magnetic suspension damping assembly, and the two groups of elastic restoring assemblies are respectively connected between the moving direction of the moving mass block and the damper mounting frame. The control method is to control and adjust the current output to the driver of the damper according to the intensity parameter measured in real time by establishing a tower-damper coupling model. The invention has the advantages of good vibration reduction and inhibition effects, compact structure and the like.

Inventors

NIU HUAWEI
XU JIXIANG
ZHANG HONGYI
DAI XIAOYAN

Assignees

湖南大学

Dates

Publication Date: 20260508
Application Date: 20260410

Claims (10)

1. A bidirectional vibration damping tuned mass damper for a tower is characterized by comprising a damper mounting frame, a moving mass block, a magnetic suspension damping assembly, an eddy current damping assembly, two groups of elastic restoring assemblies and two groups of horizontal guide assemblies which are arranged in a crossed and layered mode, wherein the damper mounting frame is mounted at the top end of the tower, the moving mass block can be mounted in the damper mounting frame in a multidirectional horizontal moving mode through the horizontal guide assemblies and is mounted in a suspended mode through the magnetic suspension damping assembly arranged on the horizontal guide assemblies, the eddy current damping assembly is integrally mounted on the magnetic suspension damping assembly, and the two groups of elastic restoring assemblies are respectively connected between the moving direction of the moving mass block and the damper mounting frame.
2. The bidirectional vibration damping tuned mass damper for the tower according to claim 1, wherein the two groups of the magnetic suspension damping components and the eddy current damping components are arranged in a vertically overlapped mode, the two groups of the magnetic suspension damping components are correspondingly arranged in one group of the horizontal guiding components, and the two groups of the eddy current damping components are respectively arranged between the corresponding magnetic suspension damping components and the horizontal guiding components.
3. The bi-directional vibration damping tuned mass damper for a tower according to claim 2, wherein the horizontal guide assembly comprises a T-shaped guide beam and two L-shaped mating guide beams oppositely disposed on both sides of the T-shaped guide beam to form a guide track for the moving mass, the magnetic levitation damping assembly being disposed within the guide track.
4. The bidirectional vibration damping tuned mass damper for a tower of claim 3, wherein the L-shaped matched guide beam of the horizontal guide assembly positioned at the upper layer is fixedly connected with the moving mass block, the corresponding T-shaped guide beam positioned at the upper layer is in unidirectional sliding connection with the damper mounting frame through a sliding rail, the L-shaped matched guide beam of the horizontal guide assembly positioned at the lower layer is fixedly connected with the T-shaped guide beam positioned at the upper layer, and the corresponding T-shaped guide beam is fixedly connected with the bottom of the damper mounting frame.
5. A bidirectional vibration damping tuned mass damper for a tower according to any one of claims 1-4, wherein the magnetic levitation damping assembly comprises an upper electromagnet group and a lower electromagnet group which are arranged on the horizontal guiding assembly in an up-down opposite manner, and the eddy current damping assembly comprises a conductor block which is arranged at the bottom end of the upper electromagnet group and is arranged opposite to the lower electromagnet group to form eddy current damping.
6. A vibration control method for the bidirectional vibration damping tuned mass damper for a tower according to any one of claims 1 to 5, comprising the steps of: s01, performing bidirectional coupling modeling on inertia force, damping force and elastic force and a tower, and establishing a tower-damper coupling model; S02, measuring intensity parameters of tower structure response in real time; S03, controlling and adjusting the current output to the damper electromagnet group according to the intensity parameter measured in real time 。
7. The method for controlling vibration of a bidirectional vibration damping tuned mass damper for a tower according to claim 6, wherein in step S01, a tower-damper coupling model is created as follows: , , , , Wherein m, c, k represent the equivalent mass, damping coefficient and stiffness coefficient of the tower structure, respectively, The force of inertia is indicated as such, The damping force is indicated as such, Indicating the elastic restoring force of the elastic member, Indicating the load of the external wind, Indicating the reaction of the damper to the tower, Representing the mass of the mass inside the damper, , , Respectively the acceleration, velocity and displacement of the damper mass relative to the tower, , , Representing the acceleration, velocity and displacement of the tower structure respectively, Representing the natural frequency of the damper, Indicating the damping ratio of the damper, Representing the damping coefficient of the damper, Indicating the equivalent stiffness of the damper, Expressed in terms of modulus of elasticity of the material Moment of inertia of cross section Geometric ruler Is a function of (2).
8. The method of vibration control of a bi-directional vibration damping tuned mass damper for a tower according to claim 7, wherein establishing a tower-damper coupling model in step S01 further comprises establishing optimization criteria with the objective of maximizing suppression of maximum resonance peaks for the tower structure and minimizing control cost/energy consumption as follows: , Wherein, the Is the frequency domain amplitude of the tower response after the control system is added, Is the magnitude of the response in the absence of control, Is the actual damping ratio and the optimal reference damping ratio Is used for the deviation of (a), Is a wind vibration control weight factor, Is the reference damping ratio.
9. The vibration control method of a bidirectional vibration damping tuned mass damper for a tower according to claim 6, 7 or 8, wherein in step S02, the severity parameter of the structural response is an absolute value of vibration acceleration |a| of the tower, and step S03 includes: judging the absolute value |a| of the vibration acceleration of the tower; if the absolute value |a| of the acceleration is smaller than a first preset threshold value, adopting a basic suspension mode to control and output constant current Wherein For the pre-compression coefficient, the temperature coefficient is the pre-compression coefficient, For the mass of the tower frame, Gravitational acceleration; An adaptive damping mode is employed if the absolute value of acceleration |a| is between a first preset threshold value and a second preset threshold value, in accordance with the following by executing a PID control algorithm Regulating current Wherein As a basis of the current of the electric motor, In order to integrate the gain, Is a differential gain; if the absolute value |a| of the acceleration is larger than a second preset threshold value, adopting a harmonic targeted suppression mode according to the following steps of Regulating current Wherein In order to control the magnitude of the force, For the tower to dominate the frequency, Time is; The first preset threshold is smaller than the second preset threshold.
10. The vibration control method of a bidirectional vibration damping tuned mass damper for a tower according to claim 9, wherein in the harmonic targeting suppression mode, the force amplitude is controlled In direct proportion to the rate of change of acceleration of tower vibrations, i.e , In order to achieve a jerk gain, The degree of jerk is indicated by the degree of jerk, A preset coefficient of less than 1.

Description

Bidirectional vibration reduction tuned mass damper for tower and vibration control method Technical Field The invention relates to the field of tower vibration reduction, in particular to a bidirectional vibration reduction tuned mass damper for a tower and a vibration control method. Background The transmission tower line system is an infrastructure of a transmission line and mainly comprises a transmission tower, a basic part, a ground wire, an insulator, line hardware fittings and the like. The power transmission tower is a main bearing structure in a tower line system, is usually a towering truss structure, has the characteristics of towering structure, light tower body, heavy self weight and the like, and is easy to generate obvious vibration under the action of external load. Wind is a main excitation factor for causing vibration of the power transmission tower, and wind load is an important reason for causing collapse accidents of the power transmission tower and power failure of a line especially in coastal strong typhoons, so that vibration reduction control on the power transmission tower structure is important for power transmission safety. Disclosure of Invention The invention aims to solve the technical problem of overcoming the defects of the prior art and providing the bidirectional vibration damping tuned mass damper for the frame and the vibration control method, which have good vibration damping and inhibiting effects and compact structures. In order to solve the technical problems, the technical scheme provided by the invention is as follows: The bidirectional vibration damping tuned mass damper for the tower comprises a damper mounting frame, a moving mass block, a magnetic suspension damping assembly, an eddy current damping assembly, two groups of elastic restoring assemblies and two groups of horizontal guide assemblies which are arranged in a crossed and layered mode, wherein the damper mounting frame is mounted at the top end of the tower, the moving mass block can be mounted in the damper mounting frame in a multidirectional horizontal moving mode through the horizontal guide assemblies and is mounted in a suspended mode through the magnetic suspension damping assembly arranged on the horizontal guide assemblies, the eddy current damping assembly is integrally mounted on the magnetic suspension damping assembly, and the two groups of elastic restoring assemblies are respectively connected between the moving direction of the moving mass block and the damper mounting frame. As a further improvement of the application, the two groups of the magnetic suspension damping components and the eddy current damping components are arranged in an up-down overlapped mode, the two groups of the magnetic suspension damping components are correspondingly arranged in one group of the horizontal guiding components, and the two groups of the eddy current damping components are respectively positioned between the corresponding magnetic suspension damping components and the horizontal guiding components. As a further improvement of the application, the horizontal guide assembly comprises a T-shaped guide beam and two L-shaped matched guide beams, wherein the two L-shaped matched guide beams are oppositely arranged at two sides of the T-shaped guide beam to form a guide track of the moving mass block, and the magnetic suspension damping assembly is arranged in the guide track. The upper T-shaped guide beam is fixedly connected with the moving mass block in a guiding mode on the lower layer by utilizing a bullnose bearing between the upper T-shaped guide beam and the L-shaped guide beam, and the corresponding T-shaped guide beam is fixedly connected with the bottom of the damper mounting frame. As a further improvement of the application, the magnetic suspension damping assembly comprises an upper electromagnet group, a lower electromagnet group, a controller, a stabilized voltage supply and a motion sensor which are arranged on the horizontal guide assembly in an up-down opposite mode, and the electric vortex damping assembly comprises a conductor block which is arranged at the bottom end of the upper electromagnet group and is arranged opposite to the lower electromagnet group to form electric vortex damping. The vibration control method of the bidirectional vibration reduction tuned mass damper for the tower comprises the following steps of: s01, performing bidirectional coupling modeling on inertia force, damping force and elastic force and a tower, and establishing a tower-damper coupling model; S02, measuring intensity parameters of tower structure response in real time; s03, controlling and adjusting the current output to the driver of the damper according to the intensity parameter measured in real time 。 As a further improvement of the present application, in step S01, a tower-damper coupling model is established as follows: , , ,, Wherein m, c, k represent the equivalent mass, damping coefficie