CN108560754B - Eddy current tuned mass damper with semi-active metamorphic variable damping - Google Patents
Eddy current tuned mass damper with semi-active metamorphic variable damping Download PDFInfo
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- CN108560754B CN108560754B CN201810390815.3A CN201810390815A CN108560754B CN 108560754 B CN108560754 B CN 108560754B CN 201810390815 A CN201810390815 A CN 201810390815A CN 108560754 B CN108560754 B CN 108560754B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/0215—Bearing, supporting or connecting constructions specially adapted for such buildings involving active or passive dynamic mass damping systems
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
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Abstract
The invention relates to a semi-active metamorphic variable damping eddy current tuned mass damper which consists of a semi-active variable mass tuned mass damping part, a semi-active variable eddy current damping part and a control center part. The device can convert the vibration energy of the structure into the vibration energy of the mechanical energy consumption structure of the mass block, and simultaneously convert the mechanical energy of the mass block into electric vortex, and the electric vortex generates heat to further consume the vibration energy of the structure. The control center part controls the tuning mass damping part of the semi-active variable mass to change the mass of the mass block in real time so as to adjust the frequency of the tuning mass damper to be consistent with the instantaneous frequency of the structure. Meanwhile, the control center part controls the semi-active eddy current damping part to change the distance between the conductor plate and the permanent magnet in real time so as to adjust the eddy current damping force. Compared with the prior art, the invention can realize the control of the response of the building structure under the action of wind vibration and earthquake, has better vibration control effect on the structure and improves the safety and reliability of the structure.
Description
Technical Field
The invention belongs to the technical field of civil engineering and structural vibration control, and particularly relates to an eddy current tuned mass damper with semi-active metamorphic variable damping.
Background
The tuned mass damper is composed of a mass unit, a stiffness unit and a damping unit. Tuned mass dampers are capable of imparting a reverse inertial force to the structure and dissipating vibration energy through their own damping units. The tuned mass damper can exert an optimal vibration damping effect when tuned to a frequency consistent with the structure.
The viscous damper adopts the hydraulic viscous damper to provide damping, and certain rigidity is provided while the damping is provided, so that the rigidity and the damping cannot be completely separated, and design analysis is influenced. Moreover, the hydraulic viscous damper also has the problems of oil leakage, difficult maintenance, difficult adjustment in the later period and the like, and increases the maintenance difficulty and cost. Eddy current damping is a great innovation of hydraulic viscous damping. The principle of the eddy current damper is that the conductive mass blocks cut magnetic induction lines when moving, induced electromotive force is generated in the conductors according to the Faraday electromagnetic induction principle, eddy current is formed, and vibration energy is converted into heat of the conductors, so that vibration control is achieved.
The eddy current damper has the advantages that: the magnet is not in direct contact with the conductor, so that friction damping and abrasion are avoided; is not affected by temperature and other environments; the oil leakage condition is avoided, the maintenance is easy, and the durability is good.
The traditional passive tuning mass damper can not adjust the parameters of the damper, and has the defects of narrow vibration reduction frequency band, sensitivity to frequency tuning and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior tuned mass damper by utilizing a semi-active control mode, and provides an eddy current tuned mass damper with semi-active metamorphic damping, wherein the semi-active control belongs to parameter control, and the internal parameters of a structure are actively regulated by utilizing a control mechanism, so that the structure is always in an optimal state. Compared with active control, the semi-active control does not need a large amount of external input force, only needs a small amount of external input force to drive a driver for implementing acting force, and realizes optimal control by utilizing the relative deformation and speed in the structural vibration response process as actively as possible. Semi-active control has the advantages of simplicity, easiness and economy of passive control.
The invention is realized by the following technical scheme:
the utility model provides a semi-initiative metamorphic volume damping's current vortex tuned mass damper which characterized in that: the semi-active variable mass variable eddy current damping device comprises a semi-active variable mass tuning mass damping part, a semi-active variable eddy current damping part and a control center part, wherein:
the semi-active variable-mass tuning mass damping part comprises a bottom plate (2), side plates (3), a mass block (4), a spring (5), rollers (7), a channel (8), a cavity II (13), a cavity I (12), a channel I (14), a channel II (15), a pump I (16), a pump II (17), a pipeline I (18) and a pipeline II (19); the bottom plate (2) is horizontally fixed on a top floor of the building structure, and a channel (8) is arranged on the upper side surface of the bottom plate (2); the two side plates (3) are respectively and vertically fixed on the left side and the right side of the bottom plate (2) and are vertical to the channel (8); the mass block 4 is arranged on the bottom plate 2, and the mass block 4 is arranged between the two side plates 3; the roller (7) is arranged at the lower side of the mass block (4), and the roller (7) is matched with the channel (8) to realize the horizontal movement of the mass block (4) on the bottom plate (2); the two springs (5) are respectively arranged in two gaps between the side plate and the mass block 4, one end of each spring is fixed with the mass block, and the other end of each spring is fixed on the side plate (3);
the cavity I (12) is arranged in the mass block 4, and the cavity II (13) is arranged at a position outside the mass block;
the pore canal I (14) is used for communicating the cavity I (12) and the cavity II (13), the pipeline I (18) is arranged in the pore canal I (14), and the pump I (16) is arranged on the pipeline I (18) and used for enabling a variable mass body in the cavity II (13) to enter the cavity I (12) so as to increase the weight of the mass block (4);
the pore canal II (15) is used for communicating the cavity I (12) and the cavity II (13), the pipeline II (19) is arranged in the pore canal II (15), and the pump II (17) is arranged on the pipeline II (19) and used for enabling a variable mass body in the cavity I (12) to enter the cavity II (13) so as to reduce the weight of the mass block (4).
The semi-active eddy current damping part is symmetrically arranged at the front side and the rear side of the mass block 4 and comprises a permanent magnet (6), a conductor plate (9), a magnetic conduction steel plate (10) and an actuator (11); the permanent magnets (6) are symmetrically adsorbed on the front side surface and the rear side surface of the mass block (4) to form a magnetic field; the conductor plate (9) is fixedly attached to the magnetic conduction steel plate (10), is positioned on the periphery of the bottom plate (2), and is spaced from the permanent magnet (6) to generate an induced eddy current; the actuator (11) is fixed with the conductor plate (9) and the magnetic conductive steel plate (10) for adjusting the distance between the actuator and the permanent magnet (6).
The control center part comprises an acceleration sensor I (20), an acceleration sensor II (21) and a controller (22), wherein the acceleration sensor I (20) is arranged on the side plate (3) and used for monitoring the acceleration of the mass block 4, and the acceleration sensor II (21) is arranged on the top floor (1) and used for monitoring the acceleration of the structure; the acceleration sensor I (20) and the acceleration sensor II (21) are connected to the controller 22 and used for providing the collected acceleration data to the controller 22; the controller 22 processes the collected data and outputs the processed data to control the operation of the pump I (16), the pump II (17) and the actuator (11) in real time.
The mass block (4) drives the permanent magnets (6) adsorbed on the front side and the rear side of the mass block, so that horizontal relative motion is generated between the permanent magnets (6) and the conductor plates (9) to realize conversion consumption of input vibration energy into kinetic energy, and eddy current is induced by the permanent magnets (6) and the conductor plates (9) to further consume the vibration energy through heat generation of the conductor plates (9);
the control center part realizes the adjustment of the actual effective mass of the mass block (4) in the semi-active variable-mass tuned mass damping part by controlling the pump I (16) and the pump II (17) in real time, and simultaneously realizes the adjustment of the distance between the conductor plate (9) and the permanent magnet (6) by controlling the actuator (11).
According to the technical scheme, the semi-active variable mass part can change the mass of the mass block (4) in real time so as to adjust the frequency of the tuned mass damper to be consistent with the instantaneous frequency of the structure.
According to the technical scheme, the semi-active eddy current damping part can change the distance between the conductor plate (9) and the permanent magnet (6) in real time so as to adjust the eddy current damping force.
The beneficial effects of the invention are as follows:
1. the eddy current tuned mass damper with semi-active metamorphic damping can control the vibration response of a building structure under the action of wind vibration and earthquake, the damping unit of the mass block consumes structural energy, the mass block moves to drive the permanent magnet (6) adsorbed on the side wall of the mass block to generate horizontal relative motion with the conductor plate (9), the permanent magnet (6) and the conductor plate (9) induce eddy current, and the vibration energy is consumed through the heating of the conductor plate (9), so that the analysis and design of the structure and the damper are simplified.
2. The damping device adopting the permanent magnet-conductor plate provides damping force, thereby improving the defects of the traditional viscous damper. The semi-active control is adopted, the vibration control effect of the structure is good, and the safety and reliability of the structure can be improved.
Drawings
FIG. 1 is a top view of a semi-active metamorphic damping eddy current tuned mass damper;
FIG. 2 is a front view of an eddy current tuned mass damper with semi-active metamorphic damping;
FIG. 3 is a control flow diagram of an eddy current tuned mass damper with semi-active metamorphic damping.
Reference numerals in the drawings: the system comprises a 1-top floor slab, a 2-bottom plate, a 3-side plate, a 4-mass block, a 5-spring, a 6-permanent magnet, a 7-roller, an 8-channel, a 9-conductor plate, a 10-magnetic steel plate, an 11-actuator, a 12-cavity I, a 13-cavity II, a 14-channel I, a 15-channel II, a 16-pump I, a 17-pump II, a 18-channel I, a 19-channel II, a 20-acceleration sensor I, a 21-acceleration sensor II and a 22-controller.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in figures 1 and 2, the eddy current tuned mass damper with semi-active metamorphic variable damping comprises a tuned mass damping part with semi-active metamorphic variable damping, a semi-active eddy current variable damping part and a control center part.
The semi-active variable-mass tuned mass damping part comprises a bottom plate 2, a side plate 3, a mass block 4, a spring 5, a roller 7, a channel 8, a cavity II 13, a cavity I12, a channel I14, a channel II 15, a pump I16, a pump II 17, a pipeline I18 and a pipeline II 19. The bottom plate 2 is welded on the top floor 1 of the building structure horizontally, and the side plates 3 are welded on the left side and the right side of the bottom plate 2 vertically. The channel 8 is arranged on the upper side of the bottom plate 2, and the channel 8 is perpendicular to the side plate 3. The mass block 4 is arranged on the bottom plate 2 between the two side plates 3, and a space is reserved between the mass block 4 and the two side plates 3; the roller 7 is arranged at the lower side of the mass block 4, and the roller 7 is matched with the channel 8 to realize the left-right movement of the mass block 4 on the bottom plate 2; the two springs 5 are respectively arranged in the interval formed by the mass block 4 and the side plate 3, and two ends of the springs 5 are respectively fixed with the mass block 4 and the side plate 3.
The cavity II 13 is arranged on the top floor 1, the cavity II 13 is arranged under the bottom plate 2, the cavity I12 is arranged in the mass block 4, the cavity II 13 and the cavity I12 are filled with variable mass bodies, the variable mass bodies can be water, sand, gravel and the like, and in the embodiment, water is used as the variable mass bodies. The pore canal I14 is arranged at the bottom of the mass block 4 and is used for communicating the cavity I12 and the cavity II 13, the pipeline I18 is arranged in the pore canal I14, and two ends of the pipeline I18 are respectively arranged in the cavity I12 and the cavity II 13. The pump I16 is disposed within the cavity I12 and is in mounted connection with the conduit I18 for pumping water in the cavity II 13 into the cavity I12 to increase the weight of the mass 4.
The pore canal II 15 is arranged at the bottom of the mass block 4 and is used for communicating the cavity I12 and the cavity II 13, the pipeline II 19 is arranged in the pore canal II 15, and two ends of the pipeline II 19 are respectively arranged in the cavity I12 and the cavity II 13. The pump II 17 is arranged in the cavity II 13 and is connected with the pipeline II 19 in a mounting way so as to enable water in the cavity I12 to enter the cavity II 13 to reduce the weight of the mass block 4. The specific configuration and dimensions of the semi-active variable mass tuned mass damper portion may be dependent upon engineering practices.
As shown in fig. 1, the semi-active eddy current damping part consists of a permanent magnet 6, a conductor plate 9, a magnetic conductive steel plate 10, an actuator 11 and the like. The permanent magnet 6 can be made of rare earth permanent magnet material, ferrite permanent magnet material, copper-nickel-iron and the like, and is symmetrically and uniformly adsorbed on the front side surface and the rear side surface of the mass block 4 to form a magnetic field. The conductor plate 9 is fixedly attached to the magnetic conductive steel plate 10, is symmetrically arranged on the periphery of the bottom plate 2, and is spaced from the permanent magnet 6 and the side plates for generating induced eddy current. The actuator 11 fixes the conductor plate 9 and the magnetically conductive steel plate 10, and adjusts the distance between the conductor plate 9 and the magnetically conductive steel plate 10 and the permanent magnet 6. The conductor plate 9 is made of copper, aluminum or the like.
The control center part comprises an acceleration sensor I20, an acceleration sensor II 21 and a controller 22. The acceleration sensor I20 is arranged on the side plate 3 and used for monitoring the acceleration of the structure, and the acceleration sensor II 21 is arranged on the top floor 1 and used for monitoring the acceleration of the structure; the controller is respectively connected with the acceleration sensor I20 and the acceleration sensor II 21 and used for receiving and processing data of the acceleration sensor, and the controller 22 is connected with the pump I16, the pump II 17 and the actuator 11 and used for controlling the pump and the actuator 11 to work in real time.
When the device encounters vibration:
the semi-active variable-mass tuned mass damping part converts the vibration energy of the structure into the mechanical energy of the mass block 4 to consume the energy of the structure, and meanwhile, the mass block 4 moving left and right drives the permanent magnet 6 adsorbed on the side wall of the mass block to move left and right, so that horizontal relative movement is generated between the permanent magnet 6 and the conductor plate 9, the permanent magnet 6 and the conductor plate 9 induce eddy current to generate on the conductor plate, and the vibration energy is consumed through the heating of the conductor plate 9.
The acceleration sensor I detects the acceleration of the collecting mass block and feeds back to the controller 22, the acceleration sensor II 21 detects the acceleration of the collecting structure and feeds back to the controller 22, and the controller receives signals of the two acceleration sensors and controls the pump I16, the pump II 17 and the actuator 11 according to a built-in algorithm. The controller controls the pumps I16 and II 17 in real time to change the mass of the mass 4 to adjust the frequency of the tuned mass damper to coincide with the instantaneous frequency of the structure. The controller controls the actuator 11 in real time to adjust the distance between the conductor plate 9 and the permanent magnet 6 to change the distance between the conductor plate 9 and the permanent magnet 6 in real time to adjust the eddy current damping force.
The description and applications of the present invention herein are illustrative and are not intended to limit the scope of the invention to the embodiments described above. Variations and modifications of the embodiments disclosed herein are possible, and alternatives to and equivalents of the various components of the embodiments are known to those of ordinary skill in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other assemblies, materials, and components, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the invention.
Claims (1)
1. The utility model provides a semi-initiative metamorphic volume damping's current vortex tuned mass damper which characterized in that: the semi-active variable mass variable eddy current damping device comprises a semi-active variable mass tuning mass damping part, a semi-active variable eddy current damping part and a control center part, wherein:
the semi-active variable-mass tuning mass damping part comprises a bottom plate (2), side plates (3), a mass block (4), a spring (5), rollers (7), a channel (8), a cavity II (13), a cavity I (12), a channel I (14), a channel II (15), a pump I (16), a pump II (17), a pipeline I (18) and a pipeline II (19); the bottom plate (2) is horizontally fixed on a top floor of the building structure, and a channel (8) is arranged on the upper side surface of the bottom plate (2); the two side plates (3) are respectively and vertically fixed on the left side and the right side of the bottom plate (2) and are vertical to the channel (8); the mass blocks (4) are arranged on the bottom plate (2), and the mass blocks (4) are arranged between the two side plates (3); the roller (7) is arranged at the lower side of the mass block (4), and the roller (7) is matched with the channel (8) to realize the horizontal movement of the mass block (4) on the bottom plate (2); the two springs (5) are respectively arranged in two gaps between the side plate (3) and the mass block (4), one end of each spring (5) is fixed with the mass block (4), and the other end of each spring is fixed on the side plate (3); the cavity I (12) is arranged in the mass block 4, and the cavity II (13) is arranged at a position outside the mass block; the pore canal I (14) is used for communicating the cavity I (12) and the cavity II (13), the pipeline I (18) is arranged in the pore canal I (14), and the pump I (16) is arranged on the pipeline I (18) and used for enabling a variable mass body in the cavity II (13) to enter the cavity I (12) so as to increase the weight of the mass block (4); the pore canal II (15) is used for communicating the cavity I (12) and the cavity II (13), the pipeline II (19) is arranged in the pore canal II (15), and the pump II (17) is arranged on the pipeline II (19) and used for enabling a variable mass body in the cavity I (12) to enter the cavity II (13) so as to reduce the weight of the mass block (4);
the semi-active eddy current damping part is symmetrically arranged at the front side and the rear side of the mass block (4) and comprises a permanent magnet (6), a conductor plate (9), a magnetic conduction steel plate (10) and an actuator (11); the permanent magnets (6) are symmetrically adsorbed on the front side surface and the rear side surface of the mass block (4) to form a magnetic field; the conductor plate (9) is fixedly attached to the magnetic conduction steel plate (10), is positioned on the periphery of the bottom plate (2), and is spaced from the permanent magnet (6) to generate an induced eddy current; the actuator (11) is fixed with the conductor plate (9) and the magnetic conduction steel plate (10) for adjusting the distance between the actuator and the permanent magnet (6);
the control center part comprises an acceleration sensor I (20), an acceleration sensor II (21) and a controller (22), wherein the acceleration sensor I (20) is arranged on the side plate (3) and used for monitoring the acceleration of the mass block 4, and the acceleration sensor II (21) is arranged on the top floor (1) and used for monitoring the acceleration of the structure; the acceleration sensor I (20) and the acceleration sensor II (21) are connected to the controller (22) and used for providing the collected acceleration data to the controller (22); the controller (22) processes and outputs the acquired data and controls the operation of the pump I (16), the pump II (17) and the actuator (11) in real time;
the mass block (4) drives the permanent magnets (6) adsorbed on the front side and the rear side of the mass block, so that horizontal relative motion is generated between the permanent magnets (6) and the conductor plates (9) to realize conversion consumption of input vibration energy into kinetic energy, and eddy current is induced by the permanent magnets (6) and the conductor plates (9) to further consume the vibration energy through heat generation of the conductor plates (9);
the control center part realizes the adjustment of the actual effective mass of the mass block (4) in the semi-active variable-mass tuned mass damping part by controlling the pump I (16) and the pump II (17) in real time, and simultaneously realizes the adjustment of the distance between the conductor plate (9) and the permanent magnet (6) by controlling the actuator (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810390815.3A CN108560754B (en) | 2018-04-27 | 2018-04-27 | Eddy current tuned mass damper with semi-active metamorphic variable damping |
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| CN201810390815.3A CN108560754B (en) | 2018-04-27 | 2018-04-27 | Eddy current tuned mass damper with semi-active metamorphic variable damping |
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| CN108560754B true CN108560754B (en) | 2023-07-04 |
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| CN110259239B (en) * | 2019-06-19 | 2021-03-30 | 同济大学 | System identification method and self-compensating tuned mass damper |
| CN110984664A (en) * | 2019-12-18 | 2020-04-10 | 东莞理工学院 | Multistage inductance tuning mass damper |
| CN112554359B (en) * | 2020-11-17 | 2021-11-16 | 同济大学 | Offshore wind power generation high tower controlled and protected by semi-active frequency modulation PTLCD |
| CN113063051A (en) * | 2021-03-16 | 2021-07-02 | 洛阳双瑞特种装备有限公司 | Vibration reduction and isolation method for pipeline and accessories |
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| JPH06212834A (en) * | 1993-01-13 | 1994-08-02 | Shimizu Corp | Spring pendulum type tuning mass damper |
| CN104372870A (en) * | 2014-11-13 | 2015-02-25 | 柳州东方工程橡胶制品有限公司 | Pendulous eddy current tuned mass damper vibration reduction control device |
| JP2018063015A (en) * | 2016-10-14 | 2018-04-19 | 株式会社免制震ディバイス | Mass damper |
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