CN110528719B - Beam-connected shearing displacement amplifying type eddy current damper - Google Patents
Beam-connected shearing displacement amplifying type eddy current damper Download PDFInfo
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- CN110528719B CN110528719B CN201910892136.0A CN201910892136A CN110528719B CN 110528719 B CN110528719 B CN 110528719B CN 201910892136 A CN201910892136 A CN 201910892136A CN 110528719 B CN110528719 B CN 110528719B
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- copper sheet
- eddy current
- structure assembly
- shell
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 49
- 238000010008 shearing Methods 0.000 title description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 62
- 239000010959 steel Substances 0.000 claims abstract description 62
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052802 copper Inorganic materials 0.000 claims abstract description 52
- 239000010949 copper Substances 0.000 claims abstract description 52
- 230000003321 amplification Effects 0.000 claims abstract description 28
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 28
- 230000000712 assembly Effects 0.000 claims description 9
- 238000000429 assembly Methods 0.000 claims description 9
- 230000006698 induction Effects 0.000 claims description 3
- 238000013016 damping Methods 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 17
- 238000009434 installation Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 description 9
- 230000000903 blocking effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- 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
- E04H9/023—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising rolling elements, e.g. balls, pins
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses a beam-connected shear displacement amplification type eddy current damper, and belongs to the technical field of structural vibration control. The beam-connecting shear displacement amplification type eddy current damper comprises a rigid rod, a rotating shaft, a pin column, a pin, a lever, a screw, a threaded sleeve, a copper sheet, a permanent magnet assembly, a steel structure assembly, balls, a ball support and a shell. When vibration occurs, the connecting beams at the two sides of the damper are displaced vertically relatively, at the moment, the two levers move up and down relatively to the rigid rod, and the movement can lead to rotation of the screw rod and the copper sheet; the copper sheet rotates in the magnetic field, and induced electromotive force is generated inside the copper sheet, so that eddy current is generated in the copper sheet. The eddy current effect generates a damping force that resists rotation of the copper sheet. Meanwhile, the thermal effect of the electric vortex flow can be known that the vibration energy is converted into heat energy, so that the structural vibration is reduced. The invention has reasonable design, simple structure, convenient installation, no influence on external modeling and wide application prospect.
Description
Technical Field
The invention belongs to the technical field of structural vibration control, and particularly relates to a beam-connecting shear displacement amplification type eddy current damper.
Background
A beam-connected damper is a device for reducing damage to a building by absorbing vibration energy of an earthquake, and is widely used in a shear wall building. When the building is subjected to earthquake action, the connecting beam part is required to consume the impact energy of external force on the building, and the vibration response of the connecting beam is reduced by using the damper, so that the shearing damage degree of the connecting beam under the earthquake action is greatly reduced. However, the existing beam-connected damper still has a plurality of defects, such as low energy consumption efficiency when the amplitude is small and poor capability of consuming vibration impact energy, and the defects greatly affect the safety of a building and the life and property safety of people. Aiming at the defects of the existing products, the invention provides a beam-connected shear displacement amplifying type eddy current damper based on eddy current effect energy consumption.
Disclosure of Invention
Aiming at the problem of poor capability of consuming vibration impact energy in the prior art, the invention provides the continuous beam shear displacement amplification type eddy current damper with high energy consumption efficiency.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a beam-connecting shear displacement amplification type eddy current damper comprises a rigid rod 1, a rotating shaft 2, a pin 3, a pin 4, a lever 5, a screw rod 6, a threaded sleeve 7, a copper sheet 8, a permanent magnet assembly 9, a steel structure assembly 10, balls 11, a ball support 12 and a shell 13. The shell 13 is of a hollow cuboid structure with one end open; the steel structure assembly 10 is of a cuboid structure, a through hole is formed in the middle of the steel structure assembly 10, and four space structures for installing the permanent magnet assembly 9 are built in the steel structure assembly through a plurality of steel plates; the steel structure assembly 10 is inserted into the shell 13, and a gap is reserved between the steel structure assembly and the shell, so that relative movement is allowed; the steel structure assembly 10 and the shell 13 are respectively arranged on two connecting beams;
the section of the rigid rod 1 is rectangular, the rigid rod 1 passes through a through hole of the steel structure assembly 10 and is arranged on the inner wall surface of the shell 13, the rigid rod 1 is just connected with the shell 13, and the long side direction of the rigid rod 1 is the vertical direction; the two levers 5 are provided, one end part of each lever 5 is provided with a sliding hole A501, the other end part of each lever 5 is provided with a screw rod mounting hole 502, and the middle part of each lever 5 is provided with a sliding hole B503; the pin 3 passes through the sliding holes A501 of the levers 5 to mount the two levers 5 on two sides of the rigid rod 1, and the two rotating shafts 2 in the steel structure assembly 10 respectively pass through the sliding holes B503 of the levers 5;
the four ball holders 12 are respectively arranged on the outer surfaces of the inner steel plates of the steel structure assembly 10; the two screws 6 are vertically arranged in the screw mounting holes 502 through the pins 4, and the two ends of the screws 6 sequentially penetrate through the ball bearing support 12 and the inner steel plate of the steel structure assembly 10; the four threaded sleeves 7 pass through the inner steel plate of the steel structure assembly 10 at the closed end and are positioned on the outer shell of the steel structure assembly 10, the four threaded sleeves 7 are respectively arranged at the tail end of the screw rod 6 through thread pairs, a plurality of balls 11 are respectively arranged at the closed end and the open end of each threaded sleeve 7, the balls 11 at the closed end are in contact with the inner surface of the outer shell of the steel structure assembly 10, the balls 11 at the open end are limited around the screw rod 6 through ball supports 12, and the threaded sleeves 7 freely rotate between the steel structure assembly 10 and the ball supports 12; the copper sheets 8 are respectively arranged at the outer sides of the threaded sleeves 7, and the copper sheets 8 are perpendicular to the axis of the threaded sleeves 7; the permanent magnet assemblies 9 are respectively arranged in a space formed by steel plates in the steel structure assembly 10; each group of permanent magnet assemblies 9 comprises two permanent magnets, the permanent magnets are respectively positioned at two sides of the copper sheet 8, and magnetic induction lines between the permanent magnet assemblies 9 are perpendicular to the copper sheet 8.
Further, the center of the screw mounting hole 502 is spaced from the center of the slide hole B503 by a distance R 1 The center of slide hole A501 is spaced from the center of slide hole B503 by a distance R 2 ，R 1 ＞R 2 。
The working principle of the invention is as follows:
when vibration occurs, the connecting beams at the two sides of the damper are displaced vertically relatively, and at the moment, the two levers 5 move up and down relatively to the rigid rod 1, and the movement can lead to the rotation of the screw rod 6 and the copper sheet 8; the copper sheet rotates in the magnetic field, and induced electromotive force is generated inside the copper sheet, so that eddy current is generated in the copper sheet. The eddy current effect generates a damping force that resists rotation of the copper sheet. Meanwhile, the thermal effect of the electric vortex flow can be known that the vibration energy is converted into heat energy, so that the structural vibration is reduced.
In particular, the lever can amplify the relative vertical displacement of the two sides of the connecting beam, the amplification factor is R1/R2, the larger the ratio of R1 to R2 is, the more obvious the amplification effect is, and the higher the energy consumption efficiency is. In addition, the screw pitch is set to d, each time the screw rod vertically displaces d, the copper sheet can rotate a circle, the screw pitch is very small relative to the screw rod vertical displacement, the smaller screw rod vertical displacement can cause the copper sheet with a larger angle to rotate, the eddy current damping force formed by the rotation of the copper sheet forms a large torque to the rotating shaft, the torque is converted into a large damping force for blocking the screw rod vertical movement through the screw pair, and the larger the ratio of the screw rod displacement to the screw pitch is, the better the amplification effect is, and the damper can obtain a large damping coefficient.
The beneficial effects of the invention are as follows:
the invention relates to a connecting beam shearing displacement amplifying type eddy current damper, which converts the vertical relative shearing displacement of a connecting beam into the rotation of a circular copper sheet and generates eddy current to consume energy, the shearing displacement of the connecting beam is amplified by utilizing lever and screw transmission, and the copper sheet with larger amplitude can be caused to rotate by smaller shearing displacement, so that the energy consumption efficiency is greatly improved;
(2) According to the beam-connected shear displacement amplification type eddy current damper, damping parameters can be adjusted by adjusting the lever proportion, the magnetic field intensity of the permanent magnet, the thickness of the copper sheet, the radius of the copper sheet and the distance from the copper sheet to the permanent magnet;
(3) According to the beam-connected shear displacement amplification type eddy current damper, a permanent magnet is adopted to provide a continuous magnetic field source, external energy is not needed, and a long-term stable vibration reduction effect can be generated;
(4) The bridge shear displacement amplification type eddy current damper adopts the magnetic conductive material, so that magnetic leakage of a magnetic circuit can be effectively avoided, the efficiency of eddy current damping is improved, and the influence on various surrounding components is avoided;
(5) The beam-connected shear displacement amplification type eddy current damper is reasonable in design, simple in structure and convenient to install.
(6) The invention can amplify the relative vertical displacement of the two sides of the connecting beam, the larger the amplification factor is R1/R2, the more obvious the amplification effect is, and the higher the energy consumption efficiency is.
(7) According to the invention, the screw pitch of the screw is set to be d, the screw can rotate for one circle every time of vertical displacement d of the screw, the screw pitch is very small relative to the vertical displacement of the screw, the smaller vertical displacement of the screw can cause the copper sheet with a larger angle to rotate, the eddy current damping force formed by the rotation of the copper sheet forms a large torque on the rotating shaft, the torque is converted into a large damping force for blocking the vertical movement of the screw through the screw pair, and the larger the ratio of the screw displacement to the screw pitch is, the better the amplification effect is, so that the damper obtains a large damping coefficient.
Drawings
FIG. 1 is a cross-sectional view of A-A of a beam shear displacement amplifying type eddy current damper according to the present invention;
FIG. 2 is a cross-sectional view of a B-B section of an enlarged current vortex damper of the present invention for shear displacement of a connecting beam;
FIG. 3 is a C-C cross-sectional view of a beam shear displacement amplifying type eddy current damper according to the invention;
FIG. 4 is a schematic diagram of an installation of a beam shear displacement amplifying type eddy current damper according to the present invention;
FIG. 5 is a schematic view of the lever structure of the present invention;
fig. 6 is a schematic structural view of the lever of the present invention.
In the figure: 1 a rigid rod; 2, rotating a shaft; 3, pin columns; 4, pin; 5 lever; 6, a screw rod; 7, a threaded sleeve; 8 copper sheets; 9 permanent magnet assembly; 10 a steel structural component; 11 balls; 12 ball holders; 13 a housing; 501 slide hole A;502 mounting holes; 503 slide hole B.
Detailed Description
The present invention will be further described with reference to the drawings and in conjunction with the detailed description below in order to enable one skilled in the art to practice the invention, and the scope of the present invention is not limited to the detailed description. It will be apparent that the embodiments described below are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The girder-connected shear displacement amplification type eddy current damper as shown in fig. 1, 2 and 3 comprises a rigid rod 1, a rotating shaft 2, a pin 3, a pin 4, a lever 5, a screw 6, a threaded sleeve 7, a copper sheet 8, a permanent magnet assembly 9, a steel structure assembly 10, balls 11, a ball support 12 and a shell 13. The shell 13 is of a hollow cuboid structure with one end open; the steel structure assembly 10 is of a cuboid structure, a through hole is formed in the middle of the steel structure assembly 10, and four space structures for installing the permanent magnet assembly 9 are built in the steel structure assembly through a plurality of steel plates; the steel structure assembly 10 is inserted into the shell 13, and a gap is reserved between the steel structure assembly and the shell, so that relative movement is allowed; the steel structure assembly 10 and the shell 13 are respectively arranged on two connecting beams;
the section of the rigid rod 1 is rectangular, the rigid rod 1 passes through a through hole of the steel structure assembly 10 and is arranged on the inner wall surface of the shell 13, the rigid rod 1 is just connected with the shell 13, and the long side direction of the rigid rod 1 is the vertical direction;
as shown in fig. 5 and 6, the levers 5 are two in total, one end of each lever 5 is provided with a sliding hole a501, the other end of each lever 5 is provided with a screw mounting hole 502, and the middle of each lever 5 is provided with a sliding hole B503; the pin 3 passes through the sliding holes A501 of the levers 5 to mount the two levers 5 on two sides of the rigid rod 1, and the two rotating shafts 2 in the steel structure assembly 10 respectively pass through the sliding holes B503 of the levers 5;
the four ball holders 12 are respectively arranged on the outer surfaces of the inner steel plates of the steel structure assembly 10; the two screws 6 are vertically arranged in the screw mounting holes 502 through the pins 4, and the two ends of the screws 6 sequentially penetrate through the ball bearing support 12 and the inner steel plate of the steel structure assembly 10; the four threaded sleeves 7 pass through the inner steel plate of the steel structure assembly 10 at the closed end and are positioned on the outer shell of the steel structure assembly 10, the four threaded sleeves 7 are respectively arranged at the tail end of the screw rod 6 through thread pairs, a plurality of balls 11 are respectively arranged at the closed end and the open end of each threaded sleeve 7, the balls 11 at the closed end are in contact with the inner surface of the outer shell of the steel structure assembly 10, the balls 11 at the open end are limited around the screw rod 6 through ball supports 12, and the threaded sleeves 7 freely rotate between the steel structure assembly 10 and the ball supports 12; the copper sheets 8 are respectively arranged at the outer sides of the threaded sleeves 7, and the copper sheets 8 are perpendicular to the axis of the threaded sleeves 7; the permanent magnet assemblies 9 are respectively arranged in a space formed by steel plates in the steel structure assembly 10; each group of permanent magnet assemblies 9 comprises two permanent magnets, the permanent magnets are respectively positioned at two sides of the copper sheet 8, and magnetic induction lines between the permanent magnet assemblies 9 are perpendicular to the copper sheet 8.
Further, the center of the screw mounting hole 502 is spaced from the center of the slide hole B503 by a distance R 1 The center of slide hole A501 is spaced from the center of slide hole B503 by a distance R 2 ，R 1 ＞R 2 。
The working principle of the invention is as follows:
when vibration occurs, the connecting beams at the two sides of the damper are displaced vertically relatively, and at the moment, the two levers 5 move up and down relatively to the rigid rod 1, and the movement can lead to the rotation of the screw rod 6 and the copper sheet 8; the copper sheet rotates in the magnetic field, and induced electromotive force is generated inside the copper sheet, so that eddy current is generated in the copper sheet. The eddy current effect generates a damping force that resists rotation of the copper sheet. Meanwhile, the thermal effect of the electric vortex flow can be known that the vibration energy is converted into heat energy, so that the structural vibration is reduced.
In particular, the lever can amplify the relative vertical displacement of the two sides of the connecting beam, the amplification factor is R1/R2, the larger the ratio of R1 to R2 is, the more obvious the amplification effect is, and the higher the energy consumption efficiency is. In addition, the screw pitch is set to d, each time the screw rod vertically displaces d, the copper sheet can rotate a circle, the screw pitch is very small relative to the screw rod vertical displacement, the smaller screw rod vertical displacement can cause the copper sheet with a larger angle to rotate, the eddy current damping force formed by the rotation of the copper sheet forms a large torque to the rotating shaft, the torque is converted into a large damping force for blocking the screw rod vertical movement through the screw pair, and the larger the ratio of the screw rod displacement to the screw pitch is, the better the amplification effect is, and the damper can obtain a large damping coefficient.
According to the connecting beam shearing displacement amplification type eddy current damper, vertical relative shearing displacement of the connecting beam is converted into rotation of the circular copper sheet, eddy current is generated to consume energy, the shearing displacement of the connecting beam is amplified by utilizing lever and thread transmission, and smaller shearing displacement can cause larger-amplitude rotation of the copper sheet, so that energy consumption efficiency is greatly improved;
according to the beam-connected shear displacement amplification type eddy current damper, damping parameters can be adjusted by adjusting the lever proportion, the magnetic field intensity of the permanent magnet, the thickness of the copper sheet, the radius of the copper sheet and the distance from the copper sheet to the permanent magnet;
according to the beam-connected shear displacement amplification type eddy current damper, a permanent magnet is adopted to provide a continuous magnetic field source, external energy is not needed, and a long-term stable vibration reduction effect can be generated;
the bridge shear displacement amplification type eddy current damper adopts the magnetic conductive material, so that magnetic leakage of a magnetic circuit can be effectively avoided, the efficiency of eddy current damping is improved, and the influence on various surrounding components is avoided;
the beam-connected shear displacement amplification type eddy current damper is reasonable in design, simple in structure and convenient to install.
The invention can amplify the relative vertical displacement of the two sides of the connecting beam, the larger the amplification factor is R1/R2, the more obvious the amplification effect is, and the higher the energy consumption efficiency is.
According to the invention, the screw pitch of the screw is set to be d, the screw can rotate for one circle every time of vertical displacement d of the screw, the screw pitch is very small relative to the vertical displacement of the screw, the smaller vertical displacement of the screw can cause the copper sheet with a larger angle to rotate, the eddy current damping force formed by the rotation of the copper sheet forms a large torque on the rotating shaft, the torque is converted into a large damping force for blocking the vertical movement of the screw through the screw pair, and the larger the ratio of the screw displacement to the screw pitch is, the better the amplification effect is, so that the damper obtains a large damping coefficient.
Claims (2)
1. The beam-connecting shear displacement amplification type eddy current damper is characterized by comprising a rigid rod (1), a rotating shaft (2), a pin column (3), a pin (4), a lever (5), a screw (6), a threaded sleeve (7), a copper sheet (8), a permanent magnet assembly (9), a steel structure assembly (10), balls (11), a ball support (12) and a shell (13);
the shell (13) is of a hollow cuboid structure with one end open; the steel structure assembly (10) is of a cuboid structure, a through hole is formed in the middle of the steel structure assembly (10), and four space structures for installing the permanent magnet assembly (9) are built in the steel structure assembly through a plurality of steel plates; the steel structure component (10) is inserted into the shell (13), and a gap is reserved between the steel structure component and the shell, so that relative movement is allowed; the steel structure component (10) and the shell (13) are respectively arranged on the two connecting beams;
the section of the rigid rod (1) is rectangular, the rigid rod (1) passes through a through hole of the steel structure assembly (10) and is arranged on the inner wall surface of the shell (13), the rigid rod (1) is just connected with the shell (13), and the long side direction of the rigid rod (1) is the vertical direction; the two levers (5) are provided, one end part of the lever (5) is provided with a sliding hole A (501), the other end part of the lever (5) is provided with a screw mounting hole (502), and the middle part of the lever (5) is provided with a sliding hole B (503); the pin (3) passes through the sliding holes A (501) of the levers (5) to mount the two levers (5) on two sides of the rigid rod (1), and the two rotating shafts (2) in the steel structure assembly (10) respectively pass through the sliding holes B (503) of the levers (5);
the four ball supports (12) are respectively arranged on the outer surfaces of the inner steel plates of the steel structure assembly (10); the two screws (6) are vertically arranged in the screw mounting holes (502) through the pins (4), and the two ends of the screws (6) sequentially penetrate through the ball support (12) and the inner steel plate of the steel structure assembly (10); the four threaded sleeves (7) are arranged at the tail ends of the screw rods (6) through thread pairs respectively, the four threaded sleeves (7) are provided with a plurality of balls (11) at the closed ends and the open ends of the threaded sleeves (7), the balls (11) at the closed ends are in contact with the inner surface of the shell of the steel structure assembly (10), the balls (11) at the open ends are limited around the screw rods (6) through ball holders (12), and the threaded sleeves (7) freely rotate between the steel structure assembly (10) and the ball holders (12); the copper sheets (8) are respectively arranged at the outer sides of the threaded sleeves (7), and the copper sheets (8) are perpendicular to the axis of the threaded sleeves (7); the permanent magnet assemblies (9) are respectively arranged in a space formed by steel plates in the steel structure assembly (10); each group of permanent magnet assemblies (9) comprises two permanent magnets which are respectively positioned at two sides of the copper sheet (8), and magnetic induction lines between the permanent magnet assemblies (9) are perpendicular to the copper sheet (8).
2. The girder-connected shear displacement amplified type eddy current damper according to claim 1, wherein the distance between the center of the screw mounting hole (502) and the center of the slide hole B (503) is R 1 The distance between the center of the slide hole A (501) and the center of the slide hole B (503) is R 2 ，R 1 ＞R 2 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910892136.0A CN110528719B (en) | 2019-09-20 | 2019-09-20 | Beam-connected shearing displacement amplifying type eddy current damper |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910892136.0A CN110528719B (en) | 2019-09-20 | 2019-09-20 | Beam-connected shearing displacement amplifying type eddy current damper |
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| CN110528719A CN110528719A (en) | 2019-12-03 |
| CN110528719B true CN110528719B (en) | 2024-01-30 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11754140B2 (en) | 2019-09-20 | 2023-09-12 | Dalian University Of Technology | Coupling beam eddy current damper with shear displacement amplification |
| CN110965663B (en) * | 2019-12-09 | 2021-01-05 | 湖南大学 | Energy dissipation damping device and eddy current damper |
| CN110965662A (en) * | 2019-12-09 | 2020-04-07 | 同济大学 | Energy-consuming connecting beam |
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