CN107013073A - Composite-structure magnetorheological elastomer isolator - Google Patents
Composite-structure magnetorheological elastomer isolator Download PDFInfo
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- CN107013073A CN107013073A CN201710182094.2A CN201710182094A CN107013073A CN 107013073 A CN107013073 A CN 107013073A CN 201710182094 A CN201710182094 A CN 201710182094A CN 107013073 A CN107013073 A CN 107013073A
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- magnetic
- magnetic core
- isolator
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- composite
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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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
- E04B1/36—Bearings or like supports allowing movement
-
- 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
- E04H9/022—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising laminated structures of alternating elastomeric and rigid layers
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- Architecture (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a kind of composite-structure magnetorheological elastomer isolator, including base, shock insulation platform, laminated construction, magnetic rheology elastic body, magnetic conductor, magnetic core, sleeve, coil and the connector of magnetic rheology elastic body piece and pure iron piece alternately bonded；Base is located at the lowermost end of whole isolator, and laminated construction is arranged on the boss structure of base, and magnetic core is arranged on laminated construction upper end；The boss structure of base upper end, laminated construction and magnetic core lower end cylindrical structure three are nested together by sleeve；Coil is wrapped in excircle of sleeve；Magnetic conductor is arranged on the cylindrical structure of base lower end, and positioned at the outermost end of whole isolator radial direction；Annular gap is provided between magnetic conductor and magnetic core upper end cylindrical structure, magnetic rheology elastic body is loop configuration, is embedded into the annular gap between magnetic conductor and magnetic core upper end cylindrical structure；Shock insulation platform is located at the top of whole isolator, is connected by connector with magnetic core；Isolator of the present invention is simple in construction, and shock insulation controllability is good, strong adaptability.
Description
Technical field
The invention belongs to base isolation equipment, particularly a kind of composite-structure magnetorheological elastomer isolator.
Background technology
The generation of earthquake has uncertain and unpredictability, just because of so, can just bring big prestige
The side of body.The main cause that earthquake is damaged is that the huge energy of Seismic input is discharged in the form of ripple, causes building acute
Strong rock is destroyed component.Research shows that the key of earthquake shock insulation is to isolate the seismic origin, and does not lie in dissipation seismic energy
Amount.Optimal isolating affection is that the building that deformation is only occurred in shock isolation system or above shock isolation system is moved integrally, from
And farthest reduce the relative storey displacement of building.
Optimal shock isolation system should have enough vertical bearing capacities, suitable rigidity and with good reset work(
Can, realize that the mode of optimal shock insulation is just so that the intrinsic frequency of building itself can avoid the main unwanted frequencies of earthquake in real time
Scope, so as to avoid resonance, reaches the purpose of shock insulation antidetonation.However, traditional passive shock isolation system and variable resistance damping system
This purpose can not be all realized well.
Magnetic rheology elastic body is a new branch of magnetorheological materials, and it is by soft ferromagnetic particle and polymeric matrix
Composition, can be by adjusting magnetic due to its response fast (ms magnitudes), good reversibility (removing behind magnetic field, restPose) again
The performance consecutive variations such as mechanics, electricity, magnetics of the field size to control material, have the advantage of magnetorheological materials and elastomer concurrently,
The shortcomings of magnetic flow liquid free settling, stability are poor, thus the preparation of magnetic rheology elastic body, mechanism and application in recent years are overcome again
More and more paid attention to, the focus studied as magnetorheological materials.Magnetic rheology elastic body
The features such as (Magnetorheological Elastomer, MRE) possesses real-time variable rigidity and small required energy, can change in real time
The rigidity of change system, so as to change the intrinsic frequency of system in real time, cut-out extraneous vibration is delivered to the approach of internal system, from root
The purpose of Civil Structrual Isolation is reached in sheet.Therefore, magnetic rheology elastic body shock insulation is set under the conditions of designing high-mechanic and complex conditions
It is standby, to that can realize that intelligent shock-isolation plays an important role.
At present, the problem of traditional laminated rubber damping bearing can only play function of shock insulation to the earthquake of specific frequency frequency range；It is existing
There is the magnetic rheology elastic body isolator designed by technology to be mainly used in thin tail sheep, small acceleration, the occasion of small load, substantially
Do not possess the ability for bearing large-scale load；Also, overwhelming majority isolator is variable merely with magnetorheological modulus of shearing at present
Or the variable characteristic of modulus of compressibility, without two kinds of characteristics are combined, more make full use of the rigidity of magnetic rheology elastic body
Controllability.Therefore, the strong composite construction isolator of a suitable bearing capacity is designed to be significant.
The content of the invention
Technical problem solved by the invention is to provide a kind of composite-structure magnetorheological elastomer isolator, overcome at present
Magnetic rheology elastic body isolator does not possess the ability for bearing large-scale load and most isolators will not be magnetorheological at present
The characteristic that modulus of shearing is variable or modulus of compressibility is variable combines the problem of making full use of.
The technical solution for realizing the object of the invention is：
A kind of composite-structure magnetorheological elastomer isolator, including base, shock insulation platform, magnetic rheology elastic body piece and pure iron
Laminated construction, magnetic rheology elastic body, magnetic conductor, magnetic core, sleeve, coil and the connector of piece alternately bonded；
The base is located at the lowermost end of whole isolator, includes the cylindrical structure and the cylindrical boss knot of upper end of lower end
Structure；The laminated construction is arranged on the boss structure of base, and magnetic core is arranged on laminated construction upper end, and the magnetic core is that upper end is big
The small step cylindrical structure in lower end；The sleeve is by the boss structure of base upper end, laminated construction and magnetic core lower end cylinder knot
Structure three is nested together；The coil is wrapped in excircle of sleeve；The magnetic conductor is circular cylindrical cavity structure, installed in base
On the cylindrical structure of lower end, and positioned at the outermost end of whole isolator radial direction；The magnetic conductor and magnetic core upper end cylindrical structure it
Between be provided with annular gap, the magnetic rheology elastic body be loop configuration, be embedded between magnetic conductor and magnetic core upper end cylindrical structure
Annular gap in；The shock insulation platform is located at the top of whole isolator, is connected by connector with magnetic core.
The present invention compared with prior art, its remarkable advantage：
(1) magnetic rheology elastic body selects the magnetic-particle with big magnetostriction coefficient and low magnetocrystalline anisotropy to be used as magnetic
Property filler particles, considerably increase its relative permeability so that shock insulation control effect becomes apparent from.
(2) controlled member is used as using laminated construction and magnetic rheology elastic body so that horizontal and vertical to carry and two
The modulus of elasticity in individual direction can control, and bearing capacity is strong, adds the adaptability of shock insulation.
(3) magnetic structure is simple, and magnetic energy utilization rate is high, and each design of part is simple, convenient processing, cost-effective, part it
Between it is many using threaded connection, reliability is high, easily assembling.
The present invention is described in further detail below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the composite-structure magnetorheological elastomer isolator of the present invention.
Fig. 2 is base vertical view of the invention.
Fig. 3 is annular magnetic rheology elastic body schematic diagram of the invention.
Fig. 4 is laminated construction schematic diagram of the invention.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings：
With reference to Fig. 1-Fig. 4, a kind of composite-structure magnetorheological elastomer isolator of the invention, including base 1, shock insulation platform
7th, the laminated construction 11 of magnetic rheology elastic body piece 12 and the alternately bonded of pure iron piece 13, magnetic rheology elastic body 5, magnetic conductor 2, magnetic
Core 6, sleeve 4, coil 3 and connector.
The base 1 is located at the lowermost end of whole isolator, includes the cylindrical structure and the cylindrical boss of upper end of lower end
Structure；The laminated construction 11 is arranged on the boss structure of base 1, and magnetic core 6 is arranged on the upper end of laminated construction 11, the magnetic core
6 be small top and big bottom step cylindrical structure；The sleeve 4 is by the boss structure of the upper end of base 1, laminated construction 11 and magnetic
The lower end cylindrical structure three of core 6 is nested together；The coil 3 be wrapped in sleeve 4 it is cylindrical on；The magnetic conductor 2 is cylindrical cavity
Body structure, on the cylindrical structure of the lower end of base 1, and positioned at the outermost end of whole isolator radial direction；The magnetic conductor 2 with
Annular gap is provided between the upper end cylindrical structure of magnetic core 6, the magnetic rheology elastic body 5 is loop configuration, is embedded into the He of magnetic conductor 2
In annular gap between the upper end cylindrical structure of magnetic core 6；The shock insulation platform 7 is located at the top of whole isolator, by even
Fitting is connected with magnetic core 6.
For ease of installing, as preferred, the upper end of magnetic core 6 is provided with the middle of screwed hole, the lower end of shock insulation platform 7 provided with heavy
Head bore, the connector includes screw 8, the first nut 9, the second nut 10；The upper end of screw 8 is arranged on the countersunk head of shock insulation platform 7
In hole, the lower end of screw 8 is arranged in the screwed hole of magnetic core 6；First nut 9 is arranged on the upper end of screw 8, and positioned at shock insulation
The lower end of platform 7；Second nut 10 is arranged on the lower end of screw 8, and positioned at the upper end of magnetic core 6；The He of first nut 9
Second nut 10 is used for the relative position for limiting shock insulation platform 7 and magnetic core 6.
Further, the quantity of the pure iron piece 13 is N (N >=1), and the quantity of the magnetic rheology elastic body piece 12 is M (M
=N+1).
As preferred, the magnetic rheology elastic body piece 12 and pure iron piece 13 are circular configuration, and diameter is identical；One
In a little embodiments, the magnetic rheology elastic body 12 and pure iron piece 13 can also be rectangles.By elastomeric sheets 12 and pure iron piece
Variation rigidity shift frequency control when the laminated construction 11 of 13 alternately bondeds can provide high-mechanic and earthquake, and ensure earthquake after
Shake pedestal can realize effective lateral shifting movements and superstructure is remained stationary as or fine motion.The magnetic rheology elastic body piece 12
It is made up of the magnetic rheology elastic body of laminated structure.
As preferred, the safe carrying capacity of the coil 3 is 5~10A, and diameter selection is 0.8~1.5mm, and the number of turn is
1000~1500；In some other embodiment, can the relevant parameter of coil 3 can reach magnetic current according to the size of magnetic field intensity
The magnetic saturation intensity for becoming elastomer 5 is adjusted.The electric current for being passed through coil 3 is provided by outside controllable direct current power supply, dc source
Output voltage amplitude, frequency and phase can adjust, so as to control magnetic field intensity.
Further, the magnetic rheology elastic body 5 is from the magnetic with big magnetostriction coefficient and low magnetocrystalline anisotropy
Property particle is used as magnetic filler particles；Such as Tb1-xDyxFe2 alloys are as magnetic filler particles, using 704 silicon rubber as matrix, with
Dimethicone is additive, is remarkably improved relative permeability.
Further, the base 1, magnetic conductor 2, magnetic core 6 and pure iron piece 13 use electrical pure iron DT4A, with preferable
Demagnetization characteristic and permeance, base 1, magnetic conductor 2, magnetic core 6 and pure iron piece 13 and magnetic rheology elastic body piece 12, magnetorheological bullet
Property body 5 collectively form toroid, magnetic structure is simple, and magnetic energy utilization rate is high.
As the further improvement to above-mentioned embodiment, the upper end boss structure of base 1 and the lower end cylinder knot of base 1
By round-corner transition between structure, to reduce leakage field phenomenon and structural stress.
Further, it is uniform provided with 3~6 through holes on the lower end cylindrical structure of base 1, for by whole isolator
Fixed with ground.
During work, the base 1 is connected in the structure foundation bottom, and shock insulation platform 7 and shock insulation object are connected and with it
Vibration, above and below magnetic core 6 and the generation of magnetic conductor 2 during relative displacement, magnetic rheology elastic body 5 is in by shearing condition, and when magnetic core 6
During generation lateral inclination, annular magnetic rheology elastic body 5 is again in lateral loading state；Annular magnetic rheology elastic body during vibrations
5 lateral bearings, longitudinal direction is sheared, the longitudinal load-bearing of laminated construction 11, is laterally sheared；The laminated construction 11 of the present invention has used for reference biography
The stratified energy mechanism of the laminated rubber bases of system, advantage is that the load of larger vertical direction can be born, and passes through friendship
The intensity of magnetic flux can be improved for bonding pure iron material.
After a certain size direct current signal is provided to coil 3, the change of the electric current of hot-wire coil 3 is along with magnetic field intensity
Change；The rigidity and damping of magnetic rheology elastic body 5 and laminated construction 11 all change, and change the intrinsic frequency of system
Become, that is, the phenomenon of shift frequency occur, so as to avoid exciting signal frequency resonance region, play a part of building shock insulation.
From the foregoing, it will be observed that the magnetic rheology elastic body isolator of the present invention is simple in construction, shock insulation controllability is good, strong adaptability, horizontal
To with longitudinal direction can carry and both direction modulus of elasticity can control, can be applied to building shock insulation occasion.
Although the present invention is disclosed above with preferred embodiment, so it is not limited to the present invention.Skill belonging to of the invention
Has usually intellectual in art field, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations.Cause
This, the scope of protection of the present invention is defined by those of the claims.
Claims (8)
1. a kind of composite-structure magnetorheological elastomer isolator, it is characterised in that including base (1), shock insulation platform (7), magnetic current
Become the laminated construction (11), magnetic rheology elastic body (5), magnetic conductor of elastomeric sheets (12) and pure iron piece (13) alternately bonded
(2), magnetic core (6), sleeve (4), coil (3) and connector；
The base (1) is located at the lowermost end of whole isolator, includes the cylindrical structure and the cylindrical boss knot of upper end of lower end
Structure；The laminated construction (11) is arranged on the boss structure of base (1), and magnetic core (6) is arranged on laminated construction (11) upper end, institute
Magnetic core (6) is stated for small top and big bottom step cylindrical structure；The sleeve (4) is by the boss structure of base (1) upper end, folded
Rotating fields (11) and magnetic core (6) lower end cylindrical structure three are nested together；The coil (3) be wrapped in sleeve (4) it is cylindrical on；Institute
Magnetic conductor (2) is stated for circular cylindrical cavity structure, on the cylindrical structure of base (1) lower end, and positioned at whole isolator footpath
To outermost end；Annular gap, the magnetorheological elasticity are provided between the magnetic conductor (2) and magnetic core (6) upper end cylindrical structure
Body (5) is loop configuration, is embedded into the annular gap between magnetic conductor (2) and magnetic core (6) upper end cylindrical structure；The shock insulation
Platform (7) is located at the top of whole isolator, is connected by connector with magnetic core (6).
2. composite-structure magnetorheological elastomer isolator as claimed in claim 1, it is characterised in that magnetic core (6) upper end is set
Have and counter sink is provided with the middle of screwed hole, shock insulation platform (7) lower end, the connector includes screw (8), the first nut (9), second
Nut (10)；Screw (8) upper end is arranged in the counter sink of shock insulation platform (7), and screw (8) lower end is arranged on the spiral shell of magnetic core (6)
In pit；First nut (9) is arranged on the upper end of screw (8), and positioned at the lower end of shock insulation platform (7)；Second spiral shell
Female (10) are arranged on the lower end of screw (8), and positioned at the upper end of magnetic core (6).
3. composite-structure magnetorheological elastomer isolator as claimed in claim 1, it is characterised in that the number of the pure iron piece (13)
Measure as N, N >=1；The quantity of the magnetic rheology elastic body piece (12) is M, M=N+1.
4. composite-structure magnetorheological elastomer isolator as claimed in claim 1, it is characterised in that the safety of the coil (3)
Current-carrying capacity is 5~10A, and diameter selection is 0.8~1.5mm, and the number of turn is 1000~1500.
5. composite-structure magnetorheological elastomer isolator as claimed in claim 1, it is characterised in that the magnetic rheology elastic body
(5) magnetic filler particles are used as from the magnetic-particle with big magnetostriction coefficient and low magnetocrystalline anisotropy.
6. composite-structure magnetorheological elastomer isolator as claimed in claim 5, it is characterised in that the magnetic filler particles are
Tb1-xDyxFe2 alloys, using 704 silicon rubber as matrix, using dimethicone as additive.
7. composite-structure magnetorheological elastomer isolator as claimed in claim 1, it is characterised in that the base (1), magnetic conductor
(2), magnetic core (6) and pure iron piece (13) use electrical pure iron DT4A.
8. composite-structure magnetorheological elastomer isolator as claimed in claim 1, it is characterised in that base (1) upper end is convex
Pass through round-corner transition between platform structure and base (1) lower end cylindrical structure.
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| CN201710182094.2A CN107013073B (en) | 2017-03-24 | 2017-03-24 | Composite-structure magnetorheological elastomer isolator |
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| CN201710182094.2A CN107013073B (en) | 2017-03-24 | 2017-03-24 | Composite-structure magnetorheological elastomer isolator |
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| CN107013073B CN107013073B (en) | 2019-05-31 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108317207A (en) * | 2018-04-13 | 2018-07-24 | 西安科技大学 | The MR elastomer vibration isolator of the multi-direction vibration control of vertical-horizontal can be achieved |
| CN109972667A (en) * | 2019-03-20 | 2019-07-05 | 南京理工大学 | A kind of composite-structure magnetorheological elastomer negative stiffness isolator |
| CN110344435A (en) * | 2019-07-12 | 2019-10-18 | 沈阳建筑大学 | A kind of neritic area blower foundation using bladder-type magnetic rheology elastic body |
| CN110700020A (en) * | 2019-09-20 | 2020-01-17 | 南安市董山尾机械科技有限公司 | Rail vibration isolator with multi-dimensional power |
| CN111946127A (en) * | 2020-08-19 | 2020-11-17 | 天津城建大学 | Magnetorheological elastomer intelligent shock insulation support with high vertical bearing capacity |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109972667B (en) * | 2019-03-20 | 2020-09-25 | 南京理工大学 | Composite-structure magnetorheological elastomer negative-stiffness shock isolator |
| CN110344435A (en) * | 2019-07-12 | 2019-10-18 | 沈阳建筑大学 | A kind of neritic area blower foundation using bladder-type magnetic rheology elastic body |
| CN110700020A (en) * | 2019-09-20 | 2020-01-17 | 南安市董山尾机械科技有限公司 | Rail vibration isolator with multi-dimensional power |
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| CN111946127A (en) * | 2020-08-19 | 2020-11-17 | 天津城建大学 | Magnetorheological elastomer intelligent shock insulation support with high vertical bearing capacity |
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| CN107013073B (en) | 2019-05-31 |
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