Intelligent Tuned Mass Damper with Three-Stage Variable Damping Control

Abstract

The present invention provides an intelligent tuned mass damper with three-stage variable damping control, which realizes bidirectional vibration control of the structure by smooth bidirectional sliding of the friction pendulum support in the plane; uses the relative movement between the electromagnet and the conductor plate to generate eddy current damping force to realize energy consumption in the small-amplitude vibration control stage, and adjusts the power supply of the electromagnet in real time through the control center to realize semi-active variable damping control; uses the sloshing of the liquid and the variable oil film system to realize energy consumption in the medium-amplitude vibration control stage, and adjusts the oil film thickness of the variable oil film system in real time through the control center to realize semi-active variable damping control; uses a magnetorheological damper to realize energy consumption in the large-amplitude vibration control stage, and adjusts the power supply of the magnetorheological damper in real time through the control center to realize semi-active variable damping control, and plays a limiting role of the mass block.

Description

Technical Field

[0001] The invention belongs to the technical fields of civil engineering and vibration control, and particularly relates to an intelligent tuned mass damper with three-stage variable damping control. Background Art

[0002] Structural vibration control involves applying a control system to a structure, effectively allowing it to work together with the structure to resist external dynamic loads, thereby tuning and reducing the structure's dynamic response. Depending on whether external energy input is required, structural vibration control can be categorized as passive or active (i.e., passive and active). After years of research and exploration, the degree of external energy utilization has been further refined, leading to the development of semi-active and hybrid control, which are now widely recognized in academia and engineering. With the rapid advancement of computer technology, intelligent control of structural vibration has become a cutting-edge field in vibration control research. Passive control structures have been widely used both domestically and internationally for energy-dissipating vibration reduction, seismic isolation, and vibration absorption. However, with the evolution of architectural styles and changes in people's living environments, the limitations of passive control have gradually become apparent. Two major issues are: First, passive control devices have a narrow vibration reduction frequency band and are generally only effective at controlling vibrations of a specific frequency. If the natural frequency of a structure changes over its lifecycle due to factors such as reduced stiffness, the passive control device can easily become out of tune. Second, the passive control device cannot detect and track seismic motion and make corresponding adjustments accordingly. The shock absorption control effect depends largely on the spectral characteristics of the seismic excitation and the dynamic characteristics of the structure itself.

[0003] Tuned mass dampers (TMDs) are a commonly used damper for structural vibration control. Conventional TMDs can only control unidirectional vibrations of a structure. Simultaneously controlling low-frequency vibrations in both directions within a plane using a TMD is challenging. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an intelligent tuned mass damper with three-stage variable damping control, which can simultaneously control the bidirectional movement of civil engineering structures in a plane, and has the advantages of saving the space occupied by the damper, saving the amount of mass blocks, reducing the gravity load of the damper and saving economic costs.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] An intelligent tuned mass damper with three-stage variable damping control, comprising: a floor, a mass block and a friction pendulum support, wherein the mass block is connected to the floor through the friction pendulum support; the friction pendulum support comprises: a support top plate, a slider, a conductor plate, a support bottom plate, a connecting plate and an electromagnet, the support top plate is connected to the lower surface of the mass block by welding or bolts, the lower surface of the support bottom plate is connected to the floor by welding or bolts, the conductor plate is fixed to the support bottom plate by bolts, the slider is placed between the support top plate and the conductor plate and can The invention relates to a structure in which the friction pendulum support at the bottom of the mass block is connected smoothly in both directions within the plane. The connecting plate connects the friction pendulum support at the bottom of the mass block into one piece by welding or bolting to ensure their coordinated movement. The electromagnet is adsorbed on the lower surface of the connecting plate. A damping groove is provided in the middle of the mass block, and a liquid is contained in the damping groove. The conductor plate is covered with a variable oil film system. The pier is connected to the floor by welding or concrete pouring and maintains a certain distance from the mass block. The magnetorheological damper is fixed to the pier by bolting so that the magnetorheological damper and the mass block maintain a distance of 3 m to 6 m in a static state. A plurality of acceleration sensors are also provided for measuring the in-plane X-direction acceleration and in-plane Y-direction acceleration of the support base plate and the in-plane X-direction acceleration and in-plane Y-direction acceleration of the mass block. The plurality of acceleration sensors are connected to the control center by wired or wireless transmission.

[0007] The floor, the mass block and the friction pendulum support constitute the small-amplitude vibration control part of the intelligent tuned mass damper. The mass block can slide smoothly in both directions in a plane through the friction pendulum support to achieve bidirectional vibration control of the structure. The electromagnet generates eddy current damping force through relative motion with the conductor plate to achieve energy consumption in the small-amplitude vibration control stage.

[0008] The liquid and the variable oil film system constitute the medium-amplitude vibration control part of the intelligent tuned mass damper. The liquid controls the medium-amplitude vibration of the structure by sloshing in the damping groove. The variable oil film system covers the conductor plate to provide damping force for the sliding of the slider. The sloshing of the liquid and the variable oil film system can realize energy consumption in the medium-amplitude vibration control stage.

[0009] The magnetorheological damper and the buttress constitute a large-scale vibration control part of the intelligent tuned mass damper, and the magnetorheological damper can realize the energy consumption of the mass block in the large-scale vibration control stage.

[0010] The multiple acceleration sensors and the control center constitute the servo sensing center part of the intelligent tuned mass damper. The servo sensing center part uniformly controls the small-amplitude vibration control part, the medium-amplitude vibration control part and the large-amplitude vibration control part. The control center analyzes and processes the acceleration signals of the multiple acceleration sensors to obtain the bidirectional optimal damping ratio in each stage plane of the tuned mass damper, and then adjusts the electromagnet, variable oil film system and magnetorheological damper in real time.

[0011] Specifically, the real-time adjustment includes: achieving semi-active variable damping control of small-amplitude vibrations by real-time adjustment of the current flow of the electromagnet; achieving semi-active variable damping control of medium-amplitude vibrations by real-time adjustment of the oil film thickness of the variable oil film system; achieving semi-active variable damping control of large-amplitude vibrations and limiting the mass block by real-time adjustment of the current flow of the magnetorheological damper.

[0012] Wherein, the damping groove is rectangular or circular.

[0013] Among them, the multiple acceleration sensors include at least: acceleration sensor I, adsorbed on the X direction of the side plane of the support base plate, used to measure the X-direction acceleration in the plane of the support base plate; acceleration sensor II, adsorbed on the X direction of the side plane of the mass block, used to measure the X-direction acceleration in the plane of the mass block; acceleration sensor III, adsorbed on the Y direction of the side plane of the support base plate, used to measure the Y-direction acceleration in the plane of the support base plate; acceleration sensor IV, adsorbed on the Y direction of the side plane of the mass block, used to measure the Y-direction acceleration in the plane of the mass block.

[0014] The real-time vibration signals of the intelligent tuned mass damper and the high-rise building are stored, transmitted and analyzed in real time by the servo sensor center to ensure the normal operation and safety of the high-rise building and the intelligent tuned mass damper.

[0015] The number of the friction pendulum supports may be 1 to 8.

[0016] The magnetorheological damper and the buttress each comprise one set of kits, and the intelligent tuned mass damper is provided with 4 to 8 sets of the kits.

[0017] The intelligent tuned mass damper with three-stage variable damping control provided by the present invention includes: a small-amplitude vibration control part, a medium-amplitude vibration control part, a large-amplitude vibration control part and a servo sensor central part. The servo sensor central part uniformly controls the small-amplitude vibration control part, the medium-amplitude vibration control part and the large-amplitude vibration control part; the friction pendulum support slides smoothly in both directions in the plane to achieve bidirectional vibration control of the structure; the relative motion between the electromagnet and the conductor plate generates eddy current damping force to achieve energy consumption in the small-amplitude vibration control stage, and the control central part adjusts the amount of current flowing into the electromagnet in real time to achieve semi-active variable damping control control; the energy consumption in the medium-amplitude vibration control stage is realized by using the sloshing of the liquid and the variable oil film system, and the oil film thickness of the variable oil film system is adjusted in real time by the control center to realize semi-active variable damping control; the energy consumption in the large-amplitude vibration control stage is realized by using the magnetorheological damper, and the current amount of the magnetorheological damper is adjusted in real time by the control center to realize semi-active variable damping control, and play the role of limiting the mass block; the transient response signals of the tuned mass damper and the high-rise building of the present invention are stored, transmitted and analyzed in real time by the servo sensor center part to ensure the normal operation and safety of the high-rise building and the tuned mass damper.

[0018] The intelligent tuned mass damper with three-stage variable damping control provided by the present invention adopts the above-mentioned solution, and has the following beneficial effects:

[0019] First, the intelligent tuned mass damper of the present invention can simultaneously control the bidirectional motion of the civil engineering structure in a plane, and has the advantages of saving the space occupied by the damper, saving the amount of mass blocks, reducing the gravity load of the damper and saving economic costs.

[0020] Second, the intelligent tuned mass damper of the present invention adopts different semi-active variable damping control measures under different amplitudes to ensure good vibration reduction performance in each stage; under extreme disasters, the stroke of the intelligent tuned mass damper can also be limited to ensure safety.

[0021] Third, the intelligent tuned mass damper of the present invention has better multi-hazard bidirectional vibration reduction control effect than the traditional tuned mass damper because it can adjust its own damping ratio in real time.

[0022] Fourth, when the semi-active control part of the intelligent tuned mass damper of the present invention is not started, the intelligent tuned mass damper is a conventional passive tuned mass damper. Through optimized design, it can also meet the established comfort indicators and achieve a better comfort margin under semi-active control.

[0023] Fifth, the instantaneous response signals of the intelligent tuned mass damper and the high-rise building of the present invention are stored, transmitted and analyzed in real time by the control center to ensure the normal operation and safety of the high-rise building and the intelligent tuned mass damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure is a structural diagram of the intelligent tuned mass damper with three-stage variable damping control according to the present invention.

[0025] Figure 2 This is a schematic top view of the structure of a preferred embodiment of the intelligent tuned mass damper with three-stage variable damping control of the present invention.

[0026] Figure 3 This is a structural schematic diagram of the friction pendulum support portion of the intelligent tuned mass damper with three-stage variable damping control of the present invention.

[0027] Figure 4 This is a semi-active control flow chart of the intelligent tuned mass damper with three-stage variable damping control according to the present invention.

[0028] Figure 5 This is a schematic top view of another preferred embodiment of the intelligent tuned mass damper with three-stage variable damping control of the present invention.

[0029] Figure numerals: 1-floor, 2-mass block, 3-damping groove, 4-liquid, 5-support top plate, 6-slider, 7-support bottom plate, 8-variable oil film system, 9-conductor plate, 10-connecting plate, 11-electromagnet, 12-magnetorheological damper, 13-pier, 14-acceleration sensor I, 15-acceleration sensor II, 16-acceleration sensor III, 17-acceleration sensor IV and 18-control center. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments. However, the embodiments are not intended to limit the present invention. Any similar structure and similar variations of the present invention should be included in the protection scope of the present invention.

[0031] The intelligent tuned mass damper with three-stage variable damping control proposed in the present invention includes: a small-amplitude vibration control part, a medium-amplitude vibration control part, a large-amplitude vibration control part and a servo sensing center part. The servo sensing center part uniformly controls the small-amplitude vibration control part, the medium-amplitude vibration control part and the large-amplitude vibration control part.

[0032] Small vibration control part

[0033] The small-amplitude vibration control part includes: a floor 1, a mass block 2 and a friction pendulum support, the friction pendulum support includes a support top plate 5, a slider 6, a conductor plate 9, a support bottom plate 7, a connecting plate 10 and an electromagnet 11, a rectangular or circular damping groove 3 is opened in the middle of the mass block 2, and a liquid 4 is contained in the damping groove 3, the support top plate 5 is connected to the lower surface of the mass block 2 by welding or bolts, the lower surface of the support bottom plate 7 is connected to the floor 1 by welding or bolts, the conductor plate 9 is fixed to the support bottom plate 7 by bolts, and the slider 6 is placed on the support top plate 5 and The conductor plates 9 can slide smoothly in both directions in the plane. The connecting plate 10 connects the friction pendulum support located at the bottom of the mass block 2 into one by welding or bolting to ensure their coordinated movement. The electromagnet 11 is adsorbed on the lower surface of the connecting plate 10. The mass block 2 can slide smoothly in both directions in the plane through the friction pendulum support to achieve bidirectional vibration control of the structure. The electromagnet 11 generates eddy current damping force through relative movement with the conductor plate 9 to achieve energy consumption in the small-amplitude vibration control stage, and the control center 18 adjusts the amount of current flowing into the electromagnet 11 in real time to achieve semi-active variable damping control.

[0034] The number of friction pendulum supports can be 1 to 8.

[0035] Medium amplitude vibration control part

[0036] The medium-amplitude vibration control part includes: liquid 4 and a variable oil film system 8. The liquid 4 controls the medium-amplitude vibration of the structure by shaking in the damping groove 3. The variable oil film system 8 is covered on the conductor plate 9 to provide damping force for the sliding of the slider 6. The shaking of the liquid 4 and the variable oil film system 8 can realize the energy consumption of the medium-amplitude vibration control stage, and the oil film thickness of the variable oil film system 8 is adjusted in real time through the control center 18 to realize semi-active variable damping control.

[0037] Large vibration control part

[0038] The large-scale vibration control part includes: a magnetorheological damper 12 and a pier 13. The pier 13 is connected to the floor 1 by welding or concrete pouring. The magnetorheological damper 12 is fixed to the pier 13 by bolts. The magnetorheological damper 12 and the mass block 2 maintain a distance of 3 m to 6 m in a static state. The magnetorheological damper 12 can realize the energy consumption of the mass block 2 in the large-scale vibration control stage, and adjust the current flow of the magnetorheological damper 12 in real time through the control center 18 to realize semi-active variable damping control, and play a role in limiting the mass block 2.

[0039] The magnetorheological dampers 12 and buttresses 13 appear in groups, which can be 4 to 8 groups. Figure 2In a preferred embodiment of the present invention shown in FIG, four sets of magnetorheological dampers 12 and buttresses 13 are designed, which are arranged in the positive directions of the four faces of the mass block 2. Figure 5 In another preferred embodiment of the present invention shown, eight groups of magnetorheological dampers 12 and buttresses 13 are designed and arranged in the directions of the four faces and four corners of the mass block 2 respectively.

[0040] Servo sensor hub

[0041] The servo sensing center includes: acceleration sensor I 14, acceleration sensor II 15, acceleration sensor III 16, acceleration sensor IV 17 and control center 18, wherein the acceleration sensor I 14 is adsorbed on the X direction of the side plane of the support base plate 7, and is used to measure the X-direction acceleration of the support base plate 7 in the plane, the acceleration sensor II 15 is adsorbed on the X direction of the side plane of the mass block 2, and is used to measure the X-direction acceleration of the mass block 2 in the plane, the acceleration sensor III 16 is adsorbed on the Y direction of the side plane of the support base plate 7, and is used to measure the Y-direction acceleration of the support base plate 7 in the plane, the acceleration sensor IV 17 is adsorbed on the Y direction of the side plane of the mass block 2, and is used to measure the Y-direction acceleration of the mass block 2 in the plane, the acceleration sensor I 14, acceleration sensor II 15, acceleration sensor III 16 and acceleration sensor IV 17 are connected to the control center 18 through wired or wireless transmission respectively. The control center 18 changes the amount of current supplied to the electromagnet 11 to achieve semi-active variable damping control of small-amplitude vibrations, changes the oil film thickness of the variable oil film system 8 to achieve semi-active variable damping control of medium-amplitude vibrations, and changes the amount of current supplied to the magnetorheological damper 12 to achieve semi-active variable damping control of large-amplitude vibrations. The three-stage variable damping control improves the two-way vibration intelligent control effect of high-rise buildings.

[0042] The control center 18 analyzes and processes the acceleration signals of the acceleration sensor I 14, the acceleration sensor II 15, the acceleration sensor III 16 and the acceleration sensor IV 17 to obtain the bidirectional optimal damping ratio in each stage plane of the tuned mass damper, and performs real-time adjustment of the electromagnet 11, the variable oil film system 8 and the magnetorheological damper 12 in turn.

[0043] The real-time vibration signals of the tuned mass damper and the high-rise building are stored, transmitted and analyzed in real time by the servo sensing center to ensure the normal operation and safety of the high-rise building and the tuned mass damper.

[0044] The above description is only a description of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention. Any changes or modifications made by any person skilled in the art based on the above disclosed technical content should be regarded as equivalent valid embodiments and fall within the scope of protection of the technical solution of the present invention.

Claims

1. An intelligent tuned mass damper with three-stage variable damping control, characterized in that: include: A floor (1), a mass block (2) and a friction pendulum support, wherein the mass block (2) is connected to the floor (1) via the friction pendulum support; the friction pendulum support comprises: a support top plate (5), a slider (6), a conductor plate (9), a support bottom plate (7), a connecting plate (10) and an electromagnet (11); the support top plate (5) is connected to the lower surface of the mass block (2) by welding or bolts, the lower surface of the support bottom plate (7) is connected to the floor (1) by welding or bolts, the conductor plate (9) is fixed to the support bottom plate (7) by bolts, the slider (6) is placed between the support top plate (5) and the conductor plate (9) and can slide smoothly in both directions in a plane, The connecting plate (10) connects the friction pendulum support at the bottom of the mass block (2) into one piece by welding or bolting to ensure their coordinated movement, and the electromagnet (11) is adsorbed on the lower surface of the connecting plate (10); a damping groove (3) is opened in the middle of the mass block (2), and the damping groove (3) contains a liquid (4); the conductor plate (9) is covered with a variable oil film system (8); the pier (13) is connected to the floor (1) by welding or concrete pouring and keeps a certain distance from the mass block (2), and the magnetorheological damper (12) is fixed to the pier (13) by bolting, so that the magnetorheological damper (12) and the mass block (2) maintain a 3-degree rotation in a static state. m~6 m spacing; a plurality of acceleration sensors and a control center (18) are also provided, the plurality of acceleration sensors are used to measure the in-plane X-direction acceleration and in-plane Y-direction acceleration of the support base plate (7) and the in-plane X-direction acceleration and in-plane Y-direction acceleration of the mass block (2), respectively, and the plurality of acceleration sensors are connected to the control center (18) via wired or wireless transmission; in: The floor (1), the mass block (2) and the friction pendulum support constitute a small-amplitude vibration control portion of the intelligent tuned mass damper; the mass block (2) can smoothly slide in both directions in a plane through the friction pendulum support to achieve bidirectional vibration control of the structure; the electromagnet (11) generates an eddy current damping force through relative motion with the conductor plate (9) to achieve energy consumption in the small-amplitude vibration control stage; The liquid (4) and the variable oil film system (8) constitute the medium amplitude vibration control part of the intelligent tuned mass damper. The liquid (4) controls the medium amplitude vibration of the structure by sloshing in the damping groove (3). The variable oil film system (8) covers the conductor plate (9) to provide a damping force for the sliding of the slider (6). The sloshing of the liquid (4) and the variable oil film system (8) can realize energy consumption in the medium amplitude vibration control stage. The magnetorheological damper (12) and the buttress (13) constitute a large-scale vibration control part of the intelligent tuned mass damper, and the magnetorheological damper (12) can realize the energy consumption of the mass block (2) in the large-scale vibration control stage; The multiple acceleration sensors and the control center (18) constitute the servo sensing center part of the intelligent tuned mass damper. The servo sensing center part uniformly controls the small-amplitude vibration control part, the medium-amplitude vibration control part and the large-amplitude vibration control part. The control center (18) analyzes and processes the acceleration signals of the multiple acceleration sensors to obtain the bidirectional optimal damping ratio in each stage plane of the tuned mass damper and then adjusts the electromagnet (11), the variable oil film system (8) and the magnetorheological damper (12) in real time.

2. The intelligent tuned mass damper with three-stage variable damping control according to claim 1, characterized in that: The real-time adjustment includes: Semi-active variable damping control of small-amplitude vibration is achieved by adjusting the amount of current flowing into the electromagnet (11) in real time; Realizing semi-active variable damping control of medium-amplitude vibration by adjusting the oil film thickness of the variable oil film system (8) in real time; Semi-active variable damping control of large-scale vibration and position limiting of the mass block (2) are achieved by adjusting the amount of current flowing into the magnetorheological damper (12) in real time.

3. The intelligent tuned mass damper with three-stage variable damping control according to claim 1, characterized in that: The damping groove (3) is rectangular or circular.

4. The intelligent tuned mass damper with three-stage variable damping control according to claim 1, characterized in that: The plurality of acceleration sensors include at least: An acceleration sensor I (14) is adsorbed on the X-direction of the side plane of the support base plate (7) and is used to measure the X-direction acceleration of the support base plate (7) in the plane; An acceleration sensor II (15) is adsorbed on the X-direction of the side plane of the mass block (2) and is used to measure the X-direction acceleration of the plane of the mass block (2); An acceleration sensor III (16) is adsorbed on the Y direction of the side plane of the support base plate (7) and is used to measure the Y-direction acceleration of the support base plate (7); The acceleration sensor IV (17) is adsorbed on the Y direction of the side plane of the mass block (2) and is used to measure the Y direction acceleration of the plane of the mass block (2).

5. The intelligent tuned mass damper with three-stage variable damping control according to claim 1, characterized in that: The real-time vibration signals of the intelligent tuned mass damper and the high-rise building are stored, transmitted and analyzed in real time by the servo sensing central part to ensure the normal operation and safety of the high-rise building and the intelligent tuned mass damper.

6. The intelligent tuned mass damper with three-stage variable damping control according to claim 1, characterized in that: The number of the friction pendulum supports may be 1 to 8.

7. The intelligent tuned mass damper with three-stage variable damping control according to claim 1, characterized in that: The magnetorheological damper (12) and the buttress (13) each constitute a set of kits, and the intelligent tuned mass damper is provided with 4 to 8 sets of the kits.

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