CN110499836B - Self-resetting tuned mass damper based on eddy current and shape memory alloy technology - Google Patents
Self-resetting tuned mass damper based on eddy current and shape memory alloy technology Download PDFInfo
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- CN110499836B CN110499836B CN201910891597.6A CN201910891597A CN110499836B CN 110499836 B CN110499836 B CN 110499836B CN 201910891597 A CN201910891597 A CN 201910891597A CN 110499836 B CN110499836 B CN 110499836B
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 61
- 238000005516 engineering process Methods 0.000 title claims abstract description 27
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052802 copper Inorganic materials 0.000 claims abstract description 37
- 239000010949 copper Substances 0.000 claims abstract description 37
- 238000005192 partition Methods 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 239000004020 conductor Substances 0.000 claims description 11
- 230000006698 induction Effects 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 210000003781 tooth socket Anatomy 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 14
- 238000006073 displacement reaction Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 238000013016 damping Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a self-resetting tuned mass damper based on an eddy current and shape memory alloy technology, and belongs to the technical field of structural vibration control. The self-resetting tuning mass damper comprises a hollow cuboid, a cover plate, a bolt, a mass block, a gear a, a gear b, a gear c, a copper sheet, a permanent magnet group, a partition plate, balls, hinges, a lever, a shape memory alloy, a rotating shaft a, a rotating shaft b, a supporting steel plate and a rotating shaft c. The movement of the mass block causes the rotation of the copper sheet and generates electric vortex to consume energy, the copper sheet is rotated and amplified by adopting a mode of adjusting the size of the gear, and the smaller displacement of the mass block can cause the copper sheet with a larger angle to rotate, so that the energy consumption efficiency is greatly improved; the elongation of the shape memory alloy is amplified by adjusting the ratio of the length arm of the lever, and the small displacement of the mass block can cause the larger shape memory alloy to be elongated, so that the energy consumption efficiency is high; the invention has reasonable design, simple structure, convenient installation and wide application prospect.
Description
Technical Field
The invention belongs to the technical field of structural vibration control, and particularly relates to a self-resetting tuned mass damper based on an eddy current and shape memory alloy technology.
Background
With the development of the country, the number of high-rise buildings, high-rise structures and large-span structures is increasing. Under the action of dynamic loads such as strong wind and earthquake, the structures can generate larger vibration, and normal use and safety of the structures are affected. Structural vibration control is the dissipation or isolation of the effect of external stimuli on a structure by providing vibration damping or isolation devices in the structure. At present, research and development aiming at vibration control devices are focused on passive control devices, and the devices have the advantages of simple structure, no need of manual intervention and the like, wherein the tuned mass damper is a passive control device with wide application.
The tuning mass damper is a substructure added to the main structure, and the natural frequency of the substructure is close to the natural frequency of the main structure. When the main structure vibrates, the sub-structure generates an opposite inertial force, so that the vibration of the main structure is damped. The traditional tuned mass damper has the advantages that the preset vibration reduction performance is required to be achieved, the ratio of the self mass to the mass of the controlled structure is required to reach a certain range, but the traditional tuned mass damper is limited by factors such as installation space, the design mass is often smaller, and the expected vibration reduction effect cannot be achieved. There is a need for other techniques in combination with tuned mass dampers to improve vibration damping efficiency, while eddy current and shape memory alloy techniques have good energy-dissipating vibration damping capabilities.
The eddy current damping technology is based on the law of electromagnetic induction to convert the mechanical energy of the movement of an object into electric energy in a conductor plate, and then the electric energy is converted into heat energy through the thermal resistance effect of the conductor plate to dissipate the vibration energy of the system. After the conductor plate moves in the magnetic field to generate electric eddy, the electric eddy can interact with the original magnetic field to generate damping force for preventing the conductor plate from moving relative to the magnetic field, and meanwhile, the electric eddy generated in the conductor plate is continuously dissipated into the surrounding environment in a heat energy mode. The eddy current damping technology adopts a non-contact energy consumption mode, has the advantages of good durability, long service life, easy damping adjustment and the like, and is widely applied.
The shape memory alloy is a novel functional material with various special mechanical properties, and has obvious shape memory effect, phase change super elasticity and high damping characteristic. Compared with other materials, the shape memory alloy has good fatigue resistance and large recoverable strain (6% -8%). Therefore, compared with other types of dampers, the damper based on the shape memory alloy has the characteristic of automatic recovery of deformation, has higher damping energy consumption capability, can effectively reduce the damage of the structure under the action of earthquake and wind vibration, and reduces the post-disaster repair cost.
Aiming at the defects of the existing products, the invention combines the tuned mass damper with the eddy current and shape memory alloy technology, and provides the self-resetting tuned mass damper based on the eddy current and shape memory alloy technology.
Disclosure of Invention
Aiming at the problems of low damping energy consumption, complicated maintenance process and the like in the prior art, the invention provides the self-resetting tuned mass damper which has high damping energy consumption, low maintenance cost and an automatic resetting function and is based on the eddy current and shape memory alloy technology.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the self-resetting tuning mass damper based on the eddy current and shape memory alloy technology comprises a hollow cuboid 1, a cover plate 2, a bolt 3, a mass block 4, a gear a5, a gear b6, a gear c7, a copper sheet 8, a permanent magnet group 9, a baffle 10, balls 11, a hinge 12, a lever 13, a shape memory alloy 14, a rotating shaft a15, a rotating shaft b16, a supporting steel plate 17 and a rotating shaft c18.
The hollow cuboid 1 and the cover plate 2 are fixedly connected through bolts 3 to form a main body frame of the self-resetting tuning mass damper; the hollow cuboid 1 and the cover plate 2 are fixedly arranged between the main body structures; the number of the partition boards 10 is four, the partition boards 10 and the inner wall surface of the main body frame form square spaces, and the inside of the partition boards 10 is used for installing the permanent magnet groups 9; the mass block 4 is placed in the main body frame and is positioned between four groups of partition boards, the upper surface and the lower surface of the mass block 4 are provided with a plurality of balls 11 for supporting the sliding between the mass block 4 and the hollow cuboid 1 and the cover plate 2, and the sliding direction of the mass block 4 is parallel to the vertical connecting line between the two mounting surfaces of the damper; tooth grooves are formed in two vertical side faces of the mass block 4; two rectangular grooves are formed in the mass block 4 and are used for installing a lever 13; the two gears a5 and b6 are respectively and fixedly arranged on two rotating shafts a15, so that the synchronous rotation of the gears a5 and b6 is realized; the gear a5 is meshed with the tooth slot of the mass block 4; the two ends of the rotating shaft a15 are fixedly arranged on the outer surface of the partition board 10 through supporting steel plates 17; the number of the gears c7 is two, the gears c7 are respectively and fixedly arranged on two rotating shafts b16, and the gears c7 are meshed with the gears b 6; the rotating shaft b16 passes through the partition plate 10, two ends of the rotating shaft b16 are arranged on the inner wall surface of the main body frame through bearings, and the rotating shaft b16 rotates along with the gear c 7; the permanent magnet groups 9 are four groups, are correspondingly arranged in square space, and each group has two permanent magnets; the copper sheets 8 are four in number, each two copper sheets 8 are symmetrically arranged on the rotating shaft b16 in a group, and each copper sheet 8 is positioned between the corresponding permanent magnet groups 9; the magnetic induction lines of the permanent magnet groups 9 are perpendicular to the copper sheets 8; the four levers 13 are provided, the end parts of the levers 13 are provided with through holes a131, the middle parts of the levers are provided with through holes b132, one group of every two levers 13 is hinged on the rectangular groove of the hollow cuboid 1 through the through holes a131 by the hinge 12, and the hinged part can rotate left and right under the external force; the four rotating shafts c18 respectively penetrate through the through holes a131 and are fixed on the inner wall of the hollow cuboid 1; the axis of the lever 13 is kept horizontal; the number of the shape memory alloys 14 is four, and two ends of the shape memory alloys are respectively connected with the tail end of the lever 13 and the inner wall of the hollow cuboid 1.
Further, the radius of the gear b is larger than that of the gear c.
Further, the hollow cuboid 1, the cover plate 2, the bolt 3, the mass block 4, the gear a5, the gear b6, the gear c7, the partition plate 10, the ball 11, the hinge 12, the lever 13, the rotating shaft a15, the rotating shaft b16, the supporting steel plate 17 and the rotating shaft c18 are made of magnetic conductive materials.
Further, the distance between the center of the through hole a131 and the center of the through hole b132 is L 1 The distance between the center of the through hole b132 and the mounting point of the shape memory alloy 14 is L 2 ，L 2 And L is equal to 1 The ratio of (2) is greater than 1.
Further, the balls 11 are coated with lubricating oil to reduce friction resistance.
The working principle of the invention is as follows:
when the structure vibrates, the mass block and the damper shell fixed on the structure are subjected to relative displacement under the action of inertia, and the lever and the gear are driven to rotate. The rotation of the lever causes the deformation of the shape memory alloy, converts mechanical energy into strain energy of the shape memory alloy and dissipates the strain energy; 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.
Further, the sliding distance of the mass block is d, the radius of the gear a is Ra, the radius of the gear b is Rb, the radius of the gear c is Rc, rb > Rc, the rotation angle of the copper sheet can be amplified, the rotation angle is (d/R a )×(R b /R c ) The magnification is R b /R c I.e. the larger the radius ratio of gear b to gear c, the higher the energy consumption efficiency. In addition, if the ratio of the long and short force arms of the lever is set to be m/n, the elongation of the shape memory alloy is d multiplied by m/n, namely, the larger the ratio of the force arms of the lever is, the higher the energy consumption efficiency is.
The invention has the beneficial effects that:
(1) According to the self-resetting tuned mass damper based on the eddy current and shape memory alloy technology, the axial movement of the mass block causes the rotation of the copper sheet and generates the eddy current to consume energy, the copper sheet is rotated and amplified by adopting a mode of adjusting the size of the gear, and the displacement of the small mass block can cause the rotation of the copper sheet with a larger angle, so that the energy consumption efficiency is greatly improved;
(2) According to the self-resetting tuned mass damper based on the eddy current and shape memory alloy technology, the elongation of the shape memory alloy is amplified by adjusting the ratio of the length arm of the lever, and the smaller mass displacement can cause the larger elongation of the shape memory alloy, so that the energy consumption efficiency is high;
(3) The self-resetting tuned mass damper based on the eddy current and shape memory alloy technology can realize the adjustment of damping parameters by adjusting the gear radius ratio, the lever arm ratio, the number of the shape memory alloy, the mass block mass, the magnetic field intensity of the permanent magnet, the thickness of the copper sheet and the distance from the copper sheet to the permanent magnet;
(4) The self-resetting tuned mass damper based on the eddy current and shape memory alloy technology adopts the permanent magnet to provide continuous magnetic field source, does not need external energy, and can generate a long-term stable vibration reduction effect;
(5) The self-resetting tuned mass damper based on the eddy current and shape memory alloy technology 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;
(6) The self-resetting tuned mass damper based on the eddy current and shape memory alloy technology has the advantages of reasonable design, simple structure and convenient installation.
Drawings
FIG. 1 is a cross-sectional view of A-A of a self-resetting tuned mass damper based on eddy current and shape memory alloy technology of the present invention;
FIG. 2 is a B-B cross-sectional view of the self-resetting tuned mass damper based on the eddy current and shape memory alloy technique of the present invention;
FIG. 3 is a C-C cross-sectional view of a self-resetting tuned mass damper based on eddy current and shape memory alloy technology of the present invention;
fig. 4 is a schematic view of the lever structure of the present invention.
In the figure: 1 a hollow cuboid; 2, a cover plate; 3, a bolt; 4 mass blocks; 5 gear a;6 gear b;7 gear c;8 copper sheets; 9 permanent magnet groups; 10 partition boards; 11 balls; 12 hinging; 13 lever; a 14 shape memory alloy; a15 rotation shaft a; a 16 rotation shaft b;17 supporting a steel plate; 18 a rotation axis c;131 through hole a;132 through 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 self-resetting tuning mass damper based on the eddy current and shape memory alloy technology as shown in fig. 1, 2 and 3 comprises a hollow cuboid 1, a cover plate 2, a bolt 3, a mass 4, a gear a5, a gear b6, a gear c7, a copper sheet 8, a permanent magnet group 9, a partition board 10, balls 11, a hinge 12, a lever 13, a shape memory alloy 14, a rotating shaft a15, a rotating shaft b16, a supporting steel plate 17 and a rotating shaft c18.
The hollow cuboid 1 and the cover plate 2 are fixedly connected through bolts 3 to form a main body frame of the self-resetting tuning mass damper; the hollow cuboid 1 and the cover plate 2 are fixedly arranged between the main body structures; the number of the partition boards 10 is four, the partition boards 10 and the inner wall surface of the main body frame form square spaces, and the inside of the partition boards 10 is used for installing the permanent magnet groups 9; the mass block 4 is placed in the main body frame and is positioned between four groups of partition boards, the upper surface and the lower surface of the mass block 4 are provided with a plurality of balls 11 for supporting the sliding between the mass block 4 and the hollow cuboid 1 and the cover plate 2, and the sliding direction of the mass block 4 is parallel to the vertical connecting line between the two mounting surfaces of the damper; tooth grooves are formed in two vertical side faces of the mass block 4; two rectangular grooves are formed in the mass block 4 and are used for installing a lever 13; the two gears a5 and b6 are respectively and fixedly arranged on two rotating shafts a15, so that the synchronous rotation of the gears a5 and b6 is realized; the gear a5 is meshed with the tooth slot of the mass block 4; the two ends of the rotating shaft a15 are fixedly arranged on the outer surface of the partition board 10 through supporting steel plates 17; the number of the gears c7 is two, the gears c7 are respectively and fixedly arranged on two rotating shafts b16, and the gears c7 are meshed with the gears b 6; the rotating shaft b16 passes through the partition plate 10, two ends of the rotating shaft b16 are arranged on the inner wall surface of the main body frame through bearings, and the rotating shaft b16 rotates along with the gear c 7; the permanent magnet groups 9 are four groups, are correspondingly arranged in square space, and each group has two permanent magnets; the copper sheets 8 are four in number, each two copper sheets 8 are symmetrically arranged on the rotating shaft b16 in a group, and each copper sheet 8 is positioned between the corresponding permanent magnet groups 9; the magnetic induction lines of the permanent magnet groups 9 are perpendicular to the copper sheets 8; as shown in fig. 4, four levers 13 are provided, the end parts of the levers 13 are provided with through holes a131, the middle parts of the levers are provided with through holes b132, one group of every two levers 13 is hinged on the rectangular groove of the hollow cuboid 1 through the through holes a131 by the hinge 12, and the hinged part can rotate left and right under the external force; the four rotating shafts c18 respectively penetrate through the through holes a131 and are fixed on the inner wall of the hollow cuboid 1; the axis of the lever 13 is kept horizontal; the number of the shape memory alloys 14 is four, and two ends of the shape memory alloys are respectively connected with the tail end of the lever 13 and the inner wall of the hollow cuboid 1.
Further, the radius of the gear b is larger than that of the gear c.
Further, the hollow cuboid 1, the cover plate 2, the bolt 3, the mass block 4, the gear a5, the gear b6, the gear c7, the partition plate 10, the ball 11, the hinge 12, the lever 13, the rotating shaft a15, the rotating shaft b16, the supporting steel plate 17 and the rotating shaft c18 are made of magnetic conductive materials.
Further, the distance between the center of the through hole a131 and the center of the through hole b132 is L 1 The distance between the center of the through hole b132 and the mounting point of the shape memory alloy 14 is L 2 ，L 2 And L is equal to 1 The ratio of (2) is greater than 1.
Further, the balls 11 are coated with lubricating oil to reduce friction resistance.
When the structure vibrates, the device shell just connected with the structure horizontally moves, the mass block 4 is displaced and delayed under the inertia effect, and a force opposite to the movement direction of the structure is applied to the structure, so that the amplitude of the structure can be reduced; at the same time, the shape memory alloy 14 can automatically reset the mass 4 after moving.
The mass block 4 and the shell are relatively displaced, the gear a5 and the gear b6 are driven by the teeth on the side edge of the mass block, the gear c7 is driven by the gear b6, the copper sheet 8 is driven by the gear c7 to cut the magnetic induction line to generate eddy current and consume energy, and the rotation angle of the copper sheet 8 is amplified by a method of adjusting the radius ratio of the gear, so that the energy consumption efficiency is greatly improved;
the lever 13 moves under the drive of the mass block 4, the shape memory alloy 14 stretches further, and the vibration mechanical energy is converted into elastic potential energy of the shape memory alloy 14, so that the structure amplitude is reduced; the method of adjusting the arm ratio of the lever 13 is adopted to increase the elongation of the shape memory alloy 14, so that the energy consumption efficiency is improved;
the axial movement of the mass block 4 causes the rotation of the copper sheet 8 and generates electric vortex to consume energy, the copper sheet 8 is rotated and amplified by adopting a mode of adjusting the size of a gear, and the smaller displacement of the mass block 4 can cause the copper sheet 8 with a larger angle to rotate, so that the energy consumption efficiency is greatly improved; the elongation of the shape memory alloy 14 is amplified by adjusting the ratio of the long arm to the short arm of the lever 13, and the smaller displacement of the mass block 4 can cause the larger elongation of the shape memory alloy 14, so that the energy consumption efficiency is high; the damping parameters are adjusted by adjusting the radius ratio of the gears, the arm ratio of the levers 13, the quantity of the shape memory alloy 14, the mass of the mass block 4, the magnetic field intensity of the permanent magnet 9, the thickness of the copper sheet 8 and the distance from the copper sheet 8 to the permanent magnet 9; the permanent magnet 9 is adopted to provide a continuous magnetic field source, so that external energy is not needed, and a long-term stable vibration reduction effect can be generated; the magnetic flux leakage of the magnetic circuit can be effectively avoided by adopting the magnetic conductive material, so that the efficiency of eddy current damping is improved, and the influence on various surrounding components is avoided; reasonable design, simple structure and convenient installation.
The invention is designed with care: first, the radius of gear b6 is greater than the radius of gear c 7; secondly, the ratio of the long moment arm and the short moment arm of the lever 13 is larger than 3, wherein the moment arm close to the shape memory alloy 14 is a long moment arm, and the moment arm close to the mass block 4 is a short moment arm; thirdly, the hollow cuboid 1, the cover plate 2, the bolts, the mass blocks 4, the gears, the partition plates 10, the balls, the hinges 12, the levers 3, the rotating shafts and the supporting steel plates 17 are made of magnetic conductive materials, the balls 11 are spherical steel balls, and all the balls 11 are coated with lubricating oil to reduce friction.
The above-mentioned embodiments of the present invention are not intended to limit the scope of the present invention, and the embodiments of the present invention are not limited thereto, and all kinds of modifications, substitutions or alterations made to the above-mentioned structures of the present invention according to the above-mentioned general knowledge and conventional means of the art without departing from the basic technical ideas of the present invention shall fall within the scope of the present invention.
Claims (8)
1. The self-resetting tuning mass damper based on the eddy current and shape memory alloy technology is characterized by comprising a hollow cuboid (1), a cover plate (2), a bolt (3), a mass block (4), a gear a (5), a gear b (6), a gear c (7), a copper sheet (8), a permanent magnet group (9), a partition plate (10), a ball (11), a hinge (12), a lever (13), a shape memory alloy (14), a rotating shaft a (15), a rotating shaft b (16), a supporting steel plate (17) and a rotating shaft c (18);
the hollow cuboid (1) and the cover plate (2) are fixedly connected through bolts (3) to form a main body frame of the self-resetting tuning mass damper; the hollow cuboid (1) and the cover plate (2) are fixedly arranged between the main body structures; the four groups of the partition boards (10) are arranged, the partition boards (10) and the inner wall surface of the main body frame enclose a square space, and the inside of each partition board (10) is used for installing the permanent magnet group (9); the mass block (4) is placed in the main body frame and is positioned between four groups of partition boards, a plurality of balls (11) are arranged on the upper surface and the lower surface of the mass block (4) and are used for supporting sliding between the mass block (4) and the hollow cuboid (1) and the cover plate (2), and the sliding direction of the mass block (4) is parallel to a vertical connecting line between two mounting surfaces of the damper; two vertical side surfaces of the mass block (4) are provided with tooth grooves; two rectangular grooves are formed in the mass block (4) and are used for installing a lever (13); the two gears a (5) and the two gears b (6) are respectively and fixedly arranged on the two rotating shafts a (15), so that synchronous rotation of the gears a (5) and the gears b (6) is realized; the gear a (5) is meshed with a tooth socket of the mass block (4); the two ends of the rotating shaft a (15) are fixedly arranged on the outer surface of the partition board (10) through supporting steel plates (17); the two gears c (7) are respectively and fixedly arranged on two rotating shafts b (16), and the gears c (7) are meshed with the gears b (6); the rotating shaft b (16) passes through the partition plate (10), two ends of the rotating shaft b (16) are arranged on the inner wall surface of the main body frame through bearings, and the rotating shaft b (16) rotates along with the gear c (7); the permanent magnet groups (9) are four groups, are correspondingly arranged in square space, and each group is provided with two permanent magnets; the number of the copper sheets (8) is four, each two copper sheets are symmetrically arranged on the rotating shaft b (16), and each copper sheet (8) is positioned between the corresponding permanent magnet groups (9); the magnetic induction line of the permanent magnet group (9) is vertical to the copper sheet (8); the four levers (13) are provided, the end parts of the levers (13) are provided with through holes a (131), the middle part of each lever is provided with a through hole b (132), one group of each two levers (13) is hinged on the rectangular groove of the hollow cuboid (1) through the through holes a (131) by the hinge (12), and the hinged part can rotate left and right under the external force; the four rotating shafts c (18) respectively penetrate through the through holes a (131) and are fixed on the inner wall of the hollow cuboid (1); the axis of the lever (13) is kept horizontal; the number of the shape memory alloys (14) is four, and two ends of the shape memory alloys are respectively connected with the tail end of the lever (13) and the inner wall of the hollow cuboid (1).
2. The self-resetting tuned mass damper based on eddy current and shape memory alloy technology as recited in claim 1, wherein the radius of gear b is larger than the radius of gear c.
3. The self-resetting tuned mass damper based on the eddy current and shape memory alloy technology according to claim 1 or 2, wherein the hollow cuboid (1), the cover plate (2), the bolt (3), the mass block (4), the gear a (5), the gear b (6), the gear c (7), the partition plate (10), the ball (11), the hinge (12), the lever (13), the rotating shaft a (15), the rotating shaft b (16), the supporting steel plate (17) and the rotating shaft c (18) are all made of magnetic conductive materials.
4. Self-resetting tuned mass damper based on eddy current and shape memory alloy technology as claimed in claim 1 or 2, characterized in that the distance between the center of the through hole a (131) and the center of the through hole b (132) is L 1 The distance between the center of the through hole b (132) and the mounting point of the shape memory alloy (14) is L 2 ，L 2 And L is equal to 1 The ratio of (2) is greater than 1.
5. A self-resetting tuned mass damper based on eddy current and shape memory alloy technology as recited in claim 3, wherein the distance between the center of through hole a (131) and the center of through hole b (132) is L 1 The distance between the center of the through hole b (132) and the mounting point of the shape memory alloy (14) is L 2 ，L 2 And L is equal to 1 The ratio of (2) is greater than 1.
6. Self-resetting tuned mass damper based on eddy current and shape memory alloy technology according to claim 1, 2 or 5, characterized in that the balls (11) are lubricated to reduce friction resistance.
7. A self-resetting tuned mass damper based on eddy current and shape memory alloy technology according to claim 3, wherein the balls (11) are lubricated to reduce friction resistance.
8. Self-resetting tuned mass damper based on eddy current and shape memory alloy technology according to claim 4, wherein the balls (11) are lubricated to reduce friction resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910891597.6A CN110499836B (en) | 2019-09-20 | 2019-09-20 | Self-resetting tuned mass damper based on eddy current and shape memory alloy technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910891597.6A CN110499836B (en) | 2019-09-20 | 2019-09-20 | Self-resetting tuned mass damper based on eddy current and shape memory alloy technology |
Publications (2)
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