CN110409901A - Variation rigidity variable damping composite buffer based on magnetic rheology elastic body and current vortex - Google Patents
Variation rigidity variable damping composite buffer based on magnetic rheology elastic body and current vortex Download PDFInfo
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- CN110409901A CN110409901A CN201910753650.6A CN201910753650A CN110409901A CN 110409901 A CN110409901 A CN 110409901A CN 201910753650 A CN201910753650 A CN 201910753650A CN 110409901 A CN110409901 A CN 110409901A
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- China
- Prior art keywords
- combination beam
- elastic body
- magnetic
- rheology elastic
- conductive board
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Classifications
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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
-
- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
Abstract
The invention discloses the variation rigidity variable damping composite buffers based on magnetic rheology elastic body and current vortex, the damper is made of variable stiffness apparatus and variable damping device two parts, magnet exciting coil is equipped in the middle part of the cantilevered combination beam, the outboard end fixing assembling of the conductor magnetic conductive board has conductor plate, the present invention combines magnetic rheology elastic body variable rigidities and electric eddy-current damping device, the rigidity of combination beam can be adjusted by being passed through different size of current in magnet exciting coil, make being consistent for the vertical frequency of damper and main structure.The adjusting of damper damping can be realized by changing electromagnet magnetic field strength, when the present invention considers judder simultaneously, the amplitude that damper reversely resonates cannot infinitely increase, therefore add the adjustable electric eddy-current damping device of damping to promote energy dissipation capacity, thus in having, two kinds of operating modes of low amplitude vibrations and judder.
Description
Technical field
The present invention relates to a kind of variation rigidity variable damping composite buffers for vertical vibration damping, belong in civil engineering vibration damping
Semi- active control field.
Background technique
Civil engineering structure is also easy to produce under the action of the factors such as earthquake, charming appearance and behaviour to being detrimental to itself, and is even had and is damaged
The dynamic response of effect.In order to which the harm of structural vibration bring is effectively reduced, people take structure of vibration isolation, introduce passive energy dissipation dress
Various ways such as (dampers) are set to be attempted and applied.Wherein dissipative damping device because it is cheap, easily designed, convenient for peace
The advantages that dress and be widely applied, but traditional passive energy-consumption damper, only have preferable suppression to certain types of vibration
Effect processed, if viscoelastic damper only has apparent damping effect to local vibration, frcition damper is suitable for rarely occurred earthquake, and
Small shake, middle shake less effective, passive tuned mass damper parameter are fixed, can only be in its intrinsic frequency and main structure intrinsic frequency
There is obvious control effect when consistent.Therefore the limitation by making damperparameters that can transfer to improve vibration damping becomes new research side
To.
Parameter adjustable type damper only needs a small amount of energy that can reduce the power of main structure by adjusting inherent parameters
Response.Parameter adjustable type damper mainly has that rigidity is adjustable, the adjustable two major classes of damping at present.Common rigidity adjustable type damper
Belong to variation rigidity tuned mass damper, principle is to track the intrinsic frequency of main structure by changing the rigidity of damper itself
Rate can effectively increase the operational frequency bandwidth of damper, and damping adjustable type damper is then by hydraulic pressure, magnetorheological fluid
The modes such as shearing force that material provides the damping of damper is adjusted to it is optimal, to realize effective vibration damping.Traditional is oily, magnetorheological
Fluid damper there are leakproofness it is bad, service life is limited the problems such as weaken the output of damping force, because without regard to sealing
Leakage, damping material fatigue loss eddy current damper become new developing direction.
Individually tracking main structure intrinsic frequency and the regulative mode for individually regulating and controlling damping force still have centainly in practical projects
Limitation.When main structure is by low amplitude vibrations such as frequently occurred earthquakes, limited, the excessive resistance of the damping role of damper
The effectiveness in vibration suppression that Buddhist nun can inhibit tuned mass damper reversely to resonate instead, and when main structure is by judder, tune matter
The amplitude of amount damper reversal of vibrations unconfined cannot increase, and introducing big damping element in damper at this time but can effectively increase
Its strong oscillation damping and energy dissipating ability.Therefore a variation rigidity variable damping composite buffer for taking into account low amplitude vibrations and judder can be designed
It is very important.
Summary of the invention
The purpose of the present invention is to provide a kind of variation rigidity variable damping composite buffers for vertical vibration damping, on solving
State the problem of proposing in background technique.
To achieve the above object, the invention provides the following technical scheme: the change based on magnetic rheology elastic body and current vortex is rigid
Variable damping composite buffer is spent, the damper is made of variable stiffness apparatus and variable damping device two parts, the variation rigidity dress
It sets including combination beam support, cantilevered combination beam, magnet exciting coil, mass block, conductor plate and conductor magnetic conductive board, the combination beam branch
The right side upper end of seat is equipped with cantilevered combination beam, and magnet exciting coil, the excitation are equipped in the middle part of the cantilevered combination beam
Coil inner wall is equipped with coil rack, and the outer wall of the cantilevered combination beam is equipped with mass block, the cantilevered combination beam
Front and rear sides are each equipped with conductor magnetic conductive board, and the outboard end fixing assembling of the conductor magnetic conductive board has conductor plate；
The cantilevered combination beam specifically includes two thin-shell type pure iron, two combinations beam connections, magnetic rheology elastic body
The equal fixing assembling in the left and right sides of thin slice and combination beam cantilever end component, the magnetic rheology elastic body thin slice has combination beam connection
The outboard end fixing assembling of part, the combination beam connection has thin-shell type pure iron, the left side thin-shell type pure iron and combination beam branch
Seat fixing assembling, the right side of the right side thin-shell type pure iron and combination beam cantilever end component fixing assembling；
The variable damping device is made of electromagnet magnetic conductive board, electromagnet, conductor plate and conductor magnetic conductive board, the magnetic conductive board
Inner end fixing assembling have an electromagnet, the inner end of the electromagnet and conductor magnetic conductive board assemble.
Preferably, it is thick to be greater than beam for the deck-siding of the cantilevered combination beam.
Preferably, the combination beam support lower end is equipped with main structure panel, and combines beam support and combine with cantilevered
Beam fixing assembling.
Preferably, parallel with beam length direction at chain direction when the magnetic rheology elastic body lamellar magnetization, and with vibration side
To vertical, the modulus of shearing of magnetic rheology elastic body can be changed, and then realize and become rigid by changing the size of current in magnet exciting coil
Degree.
Preferably, the conductor magnetic conductive board is first connected without shallow slot side and conductor plate by bolt in conductor magnetic conductive board, separately
Side and combination beam cantilever end Member Welding, mass block are fixed on the upper of combination beam cantilever end component by welding or being bolted
Side.
Preferably, the electromagnet magnetic conductive board and main structure panel fixing assembling, iron core and the electromagnet of electromagnet are led
Magnetic sheet welding, and wound around coil skeleton and magnet exciting coil on iron core, electromagnet can change itself by adjusting size of current
Magnetic field strength realizes that damping is adjustable.
Compared with prior art, the beneficial effects of the present invention are: being become based on the variation rigidity of magnetic rheology elastic body and current vortex
Damp composite buffer, the present invention combines magnetic rheology elastic body variable rigidities and electric eddy-current damping device, combination beam it is rigid
Degree can be adjusted by being passed through different size of current in magnet exciting coil, make the holding one of the vertical frequency of damper and main structure
It causes.The adjusting of damper damping can be realized by changing electromagnet magnetic field strength, while when present invention consideration judder, be hindered
The amplitude that Buddhist nun's device reversely resonates cannot infinitely increase, therefore add the adjustable electric eddy-current damping device of damping to promote energy dissipation capacity,
To in having, two kinds of operating modes of low amplitude vibrations and judder.
Detailed description of the invention
Fig. 1 is that the present invention is based on the embodiments of magnetic rheology elastic body and the variation rigidity variable damping composite buffer of current vortex
Structure front view；
Fig. 2 is the structural side view of the embodiment of the present invention；
Fig. 3 is the structure axonometric drawing of the embodiment of the present invention；
Fig. 4 is thin-shell type pure iron and the connection figure that combines beam connection in the present invention；
Fig. 5 is the magnetic loop schematic diagram of cantilevered combination beam in the present invention.
In figure: 1- combines beam support, 2- thin-shell type pure iron, 3- and combines beam connection, 4- magnetic rheology elastic body thin slice, 5- line
Ring framework its magnet exciting coil, 6- combination beam cantilever end component, 7- electromagnet magnetic conductive board, 8- electromagnet, 9- conductor plate, 10- conductor
Magnetic conductive board, 11- mass block.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-5 is please referred to, the present invention provides a kind of technical solution: being become based on the variation rigidity of magnetic rheology elastic body and current vortex
Composite buffer is damped, damper is made of variable stiffness apparatus and variable damping device two parts, and variable stiffness apparatus includes combination beam
Support 1, cantilevered combination beam, magnet exciting coil 5, mass block 11, conductor plate 9 and conductor magnetic conductive board 10 combine the right side of beam support 1
Upper end is equipped with cantilevered combination beam, and magnet exciting coil 5 is equipped in the middle part of cantilevered combination beam, and 5 inner wall of magnet exciting coil is equipped with
Coil rack, the outer wall of cantilevered combination beam are equipped with mass block 11, and the front and rear sides of cantilevered combination beam are each equipped with conductor
The outboard end fixing assembling of magnetic conductive board 10, conductor magnetic conductive board 10 has conductor plate 9；
It is thin that cantilevered combination beam specifically includes two thin-shell type pure iron 2, two combination beam connections 3, magnetic rheology elastic bodies
Piece 4 and combination beam cantilever end component 6, the equal fixing assembling in the left and right sides of magnetic rheology elastic body thin slice 4 have combination beam connection 3,
The outboard end fixing assembling of combination beam connection 3 has thin-shell type pure iron 2, and left side thin-shell type pure iron 2 fixes dress with beam support 1 is combined
Match, the right side of right side thin-shell type pure iron 2 and 6 fixing assembling of combination beam cantilever end component；
Variable damping device is made of electromagnet magnetic conductive board 7, electromagnet 8, conductor plate 9 and conductor magnetic conductive board 10, magnetic conductive board 7
Inner end fixing assembling has electromagnet 8, and the inner end of electromagnet 8 and conductor magnetic conductive board 10 assemble.
The invention discloses the variation rigidity variable damping composite buffers based on magnetic rheology elastic body and current vortex, mainly include
Combination beam, combination beam support 1, combination beam coil rack its magnet exciting coil 5, mass block 11, electromagnet 8, magnetic conductive board, conductor plate 9
Deng.Variable stiffness apparatus is the interior combination beam for setting magnetic rheology elastic body, it is a kind of shell cantilever filled with magnetic rheology elastic body
Beam can adjust the rigidity of damper by the electric current changed in padding girder magnet exciting coil, and variable damping mechanism uses current vortex component,
Wherein electromagnet 8 and its magnetic conductive board are fixedly arranged in main structure, and conductor plate 9 and its magnetic conductive board are fixed on sandwich beam cantilever end, can be led to
The magnetic field strength for changing electric current adjustment electromagnet 8 is crossed, and then regulates and controls damped coefficient.The present invention can adjust tuning quality resistance simultaneously
The operational frequency bandwidth of damper had not only can be improved in the intrinsic frequency and damping of Buddhist nun's device, but also can promote its energy consumption under large amplitude
Ability has a good application prospect in the semi- active control field of civil engineering vibration damping, in order to make damper have slightly vibration
Dynamic and two kinds of operating modes of high vibration develop the variation rigidity variable damping composite damping based on magnetic rheology elastic body and current vortex
Device.When low amplitude vibrations, the shearing of magnetic rheology elastic body can be adjusted by changing the size of current of magnet exciting coil in combination beam
Modulus, to realize the change of damper stiffness, when judder, for damper while variation rigidity, conductor plate 9 can be with phase
Connect the movement of mass block 11 and vertically cut the magnetic induction line that electromagnet 8 generates, forms current vortex, regulating magnet can be passed through at this time
Electric current in 8 coils adjusts the damping of damper, provides necessary damping for vibration insulating system to enhance energy dissipation capacity, magnetorheological
It is parallel with beam length direction and the magnetization direction being applied on thin-shell type pure iron 2 at chain direction when elastomer sheet 4 magnetizes,
And it is vertical with direction of vibration, so that magnetic rheology elastic body thin slice 4 be made to be in shearing work state, thin-shell type pure iron 2 is can be formed
The magnetic conductive device of magnetic loop can make magnetic field pass through magnetic rheology elastic body thin slice 4, the magnetic conductivity of thin-shell type pure iron 2 be much larger than with it is thin
The adjacent combination beam connection 3 of shell mould pure iron 2, combination beam cantilever end component 6, can make most magnetic flux be retained in thin-shell type
In pure iron 2, the loss of magnetic flux is effectively reduced, the materials such as iron, cadmium, cobalt can be used in 8 magnetic conductive board 7 of electromagnet, conductor magnetic conductive board 10,
The material of conductor plate 9 can adopt aluminium or copper, and the present invention is based on the variation rigidity variable damping composite dampings of magnetic rheology elastic body and current vortex
Device includes variable stiffness apparatus and variable damping device.Variable stiffness apparatus is made of the interior combination beam for setting magnetic rheology elastic body, magnetorheological
Elastomer is in shearing work mode, and is bonded in magnetic loop device, by changing the magnet exciting coil electricity on magnetic loop device
Size is flowed to adjust the magnetic-Induced shear modulus of magnetic rheology elastic body, because damper stiffness can become with the change of modulus of shearing
Change, therefore can realize the variation rigidity of damper, variable damping device uses current vortex form, by the magnetic field strength for changing electromagnet 8
To realize the adjustment of damped coefficient.
Specifically, the deck-siding of cantilevered combination beam is greater than beam thickness.
Specifically, combination 1 lower end of beam support is equipped with main structure panel, and combines beam support 1 and combined with cantilevered
Beam fixing assembling.
Specifically, it is parallel with beam length direction at chain direction when magnetic rheology elastic body thin slice 4 magnetizes, and and direction of vibration
Vertically, the modulus of shearing of magnetic rheology elastic body can be changed, and then realize and become rigid by changing the size of current in magnet exciting coil
Degree.
Specifically, conductor magnetic conductive board 10 is first connected without shallow slot side and conductor plate 9 by bolt in conductor magnetic conductive board 10,
The other side and combination beam cantilever end component 6 weld, and mass block 11 is fixed on combination beam cantilever end structure by welding or being bolted
The top of part 6.
Specifically, electromagnet magnetic conductive board 7 and main structure panel fixing assembling, iron core and the electromagnet of electromagnet 8 are led
Magnetic sheet 7 welds, and wound around coil skeleton and magnet exciting coil 5 on iron core, and electromagnet 8 can be changed certainly by adjusting size of current
The magnetic field strength of body realizes that damping is adjustable.
Working principle: the present invention is anti-according to sensor under conditions of known quality ratio, main structure quality and intrinsic frequency
Control signal can be calculated in the main structure Vibration Condition reflected, controller, by adjust combination beam in magnet exciting coil electric current and
The magnetic field strength of electromagnet in current vortex device, to realize good effectiveness in vibration suppression.
In the description of the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ",
" fixation " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral, can be machinery
Connection, is also possible to be electrically connected, can be directly connected, can also can be two elements indirectly connected through an intermediary
The interaction relationship of internal connection or two elements.It for the ordinary skill in the art, can be with concrete condition
Understand the concrete meaning of above-mentioned term in the present invention.
The standardized element that the present invention uses can commercially, and shaped piece is according to specification and attached drawing note
Load can carry out customized, and the specific connection type of each part is all made of in the prior art mature bolt, rivet, welding etc.
Conventional means, mechanical, part and equipment are all made of in the prior art, conventional model, in addition circuit connection uses the prior art
Middle conventional connection type, this will not be detailed here.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. the variation rigidity variable damping composite buffer based on magnetic rheology elastic body and current vortex, it is characterised in that: the damper
It is made of variable stiffness apparatus and variable damping device two parts, the variable stiffness apparatus includes combination beam support (1), cantilevered combination
Beam, magnet exciting coil (5), mass block (11), conductor plate (9) and conductor magnetic conductive board (10), it is described combination beam support (1) right side on
End is equipped with cantilevered combination beam, is equipped in the middle part of the cantilevered combination beam magnet exciting coil (5), the magnet exciting coil (5)
Inner wall is equipped with coil rack, and the outer wall of the cantilevered combination beam is equipped with mass block (11), the cantilevered combination beam
Front and rear sides are each equipped with conductor magnetic conductive board (10), and the outboard end fixing assembling of the conductor magnetic conductive board (10) has conductor plate (9)；
The cantilevered combination beam specifically includes two thin-shell type pure iron (2), two combination beam connections (3), magnetorheological elasticity
The equal fixing assembling in the left and right sides of body thin slice (4) and combination beam cantilever end component (6), the magnetic rheology elastic body thin slice (4) has
It combines beam connection (3), the outboard end fixing assembling of combination beam connection (3) has thin-shell type pure iron (2), and left side is described thin
Shell mould pure iron (2) with combine beam support (1) fixing assembling, the right side of the right side thin-shell type pure iron (2) and combination beam cantilever end
Component (6) fixing assembling；
The variable damping device is made of electromagnet magnetic conductive board (7), electromagnet (8), conductor plate (9) and conductor magnetic conductive board (10),
The inner end fixing assembling of the magnetic conductive board (7) has electromagnet (8), the inner end of the electromagnet (8) and conductor magnetic conductive board
(10) it assembles.
2. the variation rigidity variable damping composite buffer according to claim 1 based on magnetic rheology elastic body and current vortex,
Be characterized in that: it is thick that the deck-siding of the cantilevered combination beam is greater than beam.
3. the variation rigidity variable damping composite buffer according to claim 1 based on magnetic rheology elastic body and current vortex,
Be characterized in that: combination beam support (1) lower end is equipped with main structure panel, and combines beam support (1) and combine with cantilevered
Beam fixing assembling.
4. the variation rigidity variable damping composite buffer according to claim 1 based on magnetic rheology elastic body and current vortex,
It is characterized in that: it is parallel with beam length direction at chain direction when the magnetic rheology elastic body thin slice (4) magnetizes, and hang down with direction of vibration
Directly, the modulus of shearing of magnetic rheology elastic body can be changed, and then realize variation rigidity by changing the size of current in magnet exciting coil.
5. the variation rigidity variable damping composite buffer according to claim 1 based on magnetic rheology elastic body and current vortex,
Be characterized in that: the conductor magnetic conductive board (10) is first solid by bolt without shallow slot side and conductor plate (9) in conductor magnetic conductive board (10)
Even, the other side and combination beam cantilever end component (6) weld, and mass block (11) is by welding or is bolted that be fixed on combination beam outstanding
The top of arm end component (6).
6. the variation rigidity variable damping composite buffer according to claim 1 based on magnetic rheology elastic body and current vortex,
Be characterized in that: the electromagnet magnetic conductive board (7) and main structure panel fixing assembling, the iron core of electromagnet (8) are led with electromagnet
Magnetic sheet (7) welding, and wound around coil skeleton and magnet exciting coil (5) on iron core, electromagnet (8) can by adjusting size of current,
Change the magnetic field strength of itself, realizes that damping is adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910753650.6A CN110409901B (en) | 2019-08-15 | 2019-08-15 | Variable-rigidity variable-damping composite damper based on magnetorheological elastomer and eddy current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910753650.6A CN110409901B (en) | 2019-08-15 | 2019-08-15 | Variable-rigidity variable-damping composite damper based on magnetorheological elastomer and eddy current |
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| Publication Number | Publication Date |
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| CN110409901A true CN110409901A (en) | 2019-11-05 |
| CN110409901B CN110409901B (en) | 2020-10-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114623198A (en) * | 2022-03-21 | 2022-06-14 | 苏州东菱智能减振降噪技术有限公司 | Vibration-damping and impact-resisting device |
| CN114718361A (en) * | 2022-04-28 | 2022-07-08 | 西安建筑科技大学 | Semi-active magneto-rheological elastomer damper |
| CN114718361B (en) * | 2022-04-28 | 2024-05-14 | 西安建筑科技大学 | Semi-active magnetorheological elastomer damper |
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| CN110409901B (en) | 2020-10-02 |
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