CN110528717B - Inclined strut damper based on magnetorheological elastomer - Google Patents
Inclined strut damper based on magnetorheological elastomer Download PDFInfo
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- CN110528717B CN110528717B CN201910841370.0A CN201910841370A CN110528717B CN 110528717 B CN110528717 B CN 110528717B CN 201910841370 A CN201910841370 A CN 201910841370A CN 110528717 B CN110528717 B CN 110528717B
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- magnetorheological elastomer
- pulling plate
- magnetorheological
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- coil
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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
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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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- 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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
Abstract
A diagonal bracing damper based on a magnetorheological elastomer relates to the technical field of anti-seismic devices. The inclined strut damper based on the magnetorheological elastomer comprises at least two first pulling plates which are sequentially arranged from top to bottom, a second pulling plate which can move along the horizontal direction is arranged between every two adjacent first pulling plates, at least one magnetorheological elastomer component is arranged between the second pulling plate and the adjacent first pulling plate, and the magnetorheological elastomer components are symmetrically arranged on the upper side and the lower side of the corresponding second pulling plate; the magnetorheological elastomer component comprises a magnetorheological elastomer, a coil which is arranged along the horizontal direction and sleeved on the magnetorheological elastomer, and a sleeve which is arranged along the horizontal direction and sleeved on the coil, wherein two ends of the magnetorheological elastomer are respectively connected with the corresponding first pulling plate and the second pulling plate; the first pulling plate, the second pulling plate and the sleeve are all made of ferromagnetic materials. The inclined strut damper based on the magnetorheological elastomer can change the self-vibration frequency, and avoids the phenomenon that resonance is generated when an earthquake happens to reduce the damping effect.
Description
Technical Field
The application relates to the field of anti-seismic devices, in particular to a diagonal bracing damper based on a magnetorheological elastomer.
Background
The frame system with the support can provide larger rigidity for the structure, and the inclined strut damper applied to the support is an energy dissipation device based on viscoelastic rubber materials, can absorb and consume the energy of earthquake action on a building, thereby reducing the damage of the earthquake to the building, is an efficient damping device, and has the characteristics of strong practicability, simple structure, high economic benefit and the like.
The existing damper applied to the inclined strut is mostly made of traditional rubber materials, even if the damper is structurally optimized for many times, the defect of rigidity fixation cannot be changed, when the seismic frequency is close to the structural natural vibration frequency, resonance is easy to occur, and at the moment, the traditional inclined strut damper is difficult to play a damping effect and even can cause more serious damage.
Disclosure of Invention
The application aims to provide a bracing damper based on a magnetorheological elastomer, which can change the self-vibration frequency of the structure of the bracing damper, and avoid the reduction of the vibration absorption effect due to the resonance generated when an earthquake occurs.
The embodiment of the application is realized as follows:
the embodiment of the application provides a diagonal bracing damper based on a magnetorheological elastomer, which comprises at least two first pulling plates which are sequentially arranged from top to bottom, wherein a second pulling plate capable of moving along the horizontal direction is arranged between every two adjacent first pulling plates, at least one magnetorheological elastomer assembly is arranged between the second pulling plate and the adjacent first pulling plate, and the magnetorheological elastomer assemblies are symmetrically arranged on the upper side and the lower side of the corresponding second pulling plate; the magnetorheological elastomer component comprises a magnetorheological elastomer, a coil which is arranged along the horizontal direction and sleeved on the magnetorheological elastomer, and a sleeve which is arranged along the horizontal direction and sleeved on the coil, wherein two ends of the magnetorheological elastomer are respectively connected with the corresponding first pulling plate and the second pulling plate; the first pulling plate, the second pulling plate and the sleeve are all made of ferromagnetic materials.
In some alternative embodiments, the first pulling plate is provided with a first fixture block connected with the corresponding magnetorheological elastomer.
In some alternative embodiments, the second pulling plate is provided with a second fixture block connected with the corresponding magnetorheological elastomer.
In some alternative embodiments, the magnetorheological elastomer and the corresponding coil have an annular gap therebetween.
In some alternative embodiments, the sleeves are connected with corresponding second pulling plates.
In some optional embodiments, the sleeve is provided with a through hole for wiring the coil.
In some optional embodiments, the sleeve is provided with a through hole for wiring the coil.
The beneficial effect of this application is: the inclined strut damper based on the magnetorheological elastomer comprises at least two first pulling plates which are arranged from top to bottom, wherein a second pulling plate capable of moving along the horizontal direction is arranged between every two adjacent first pulling plates, at least one magnetorheological elastomer assembly is arranged between the second pulling plate and the adjacent first pulling plate, and the magnetorheological elastomer assemblies are symmetrically arranged on the upper side and the lower side of the corresponding second pulling plate; the magnetorheological elastomer component comprises a magnetorheological elastomer, a coil which is arranged along the horizontal direction and sleeved on the magnetorheological elastomer, and a sleeve which is arranged along the horizontal direction and sleeved on the coil, wherein two ends of the magnetorheological elastomer are respectively connected with the corresponding first pulling plate and the second pulling plate; the first pulling plate, the second pulling plate and the sleeve are all made of ferromagnetic materials. The application provides a bracing attenuator based on magnetic current becomes elastomer can change the natural frequency of vibrating of self structure, avoids producing resonance reduction shock attenuation effect when the earthquake takes place.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a cross-sectional view of a magnetorheological elastomer based sprag damper provided in accordance with a first embodiment of the present application;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic cross-sectional magnetic circuit diagram of a magnetorheological elastomer based sprag damper according to a first embodiment of the present application;
FIG. 4 is a cross-sectional view of a magnetorheological elastomer based sprag damper according to a second embodiment of the present application.
In the figure: 100. a first pulling plate; 101. a first clamping block; 120. a second pulling plate; 121. a second fixture block; 130. a magnetorheological elastomer; 140. a coil; 150. a frame; 151. a partition plate; 152. a sleeve; 153. a through hole; 160. a gap.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The characteristics and performance of the magnetorheological elastomer-based sprag damper of the present application are described in further detail below with reference to the examples.
As shown in fig. 1 and fig. 2, an embodiment of the present application provides a sprag damper based on a magnetorheological elastomer, which includes a first pulling plate 100, a second pulling plate 120, and a first pulling plate 100, which are sequentially arranged from top to bottom, wherein the two first pulling plates 100 and the second pulling plate 120 are parallel to each other and are both arranged along a horizontal direction, the second pulling plate 120 is movable along the horizontal direction relative to the two first pulling plates 100, three magnetorheological elastomer assemblies are provided between the second pulling plate 120 and each first pulling plate 100, and the six magnetorheological elastomer assemblies are symmetrically arranged on upper and lower sides of the second pulling plate 120.
Each magnetorheological elastomer component comprises a magnetorheological elastomer 130, a coil 140 which is arranged along the horizontal direction and sleeved on the magnetorheological elastomer 130, and sleeves 152 which are arranged along the horizontal direction and sleeved on the coil 140, frames 150 which are arranged along the horizontal direction are respectively arranged between the second pulling plate 120 and the two first pulling plates 100, two partition plates 151 are arranged in each frame 150, and each frame 150 and the two corresponding partition plates 151 are respectively enclosed to form three sleeves 152; two sides of the second pulling plate 120 respectively protrude to form three second fixture blocks 121, the six second fixture blocks 121 are respectively connected with one ends of the six magnetorheological elastomers 130, one sides of the two first pulling plates 100 facing the magnetorheological elastomers 130 respectively protrude to form three first fixture blocks 101, and the six first fixture blocks 101 are respectively connected with the other ends of the six magnetorheological elastomers 130; an annular gap 160 is formed between the magnetorheological elastomer 130 and the corresponding coil 140, four through holes 153 for wiring the coil 140 are formed in each sleeve 152, and an electric wire (not shown in the figure) extending out of the through hole 153 is connected to the coil 140; the two first pulling plates 100, the second pulling plate 120, the first fixture block 101, the second fixture block 121 and the sleeve 152 are all made of steel, and the magnetorheological elastomer 130 is prepared from silicon rubber and carbonyl iron powder.
The bracing damper based on the magnetorheological elastomer is installed on a bracing of a building frame structure, and one ends of two first pull plates 100 and one end of two second pull plates 120 are respectively connected with the building frame structure. When the inclined strut damper based on the magnetorheological elastomers is stressed, the two first pull plates 100 and the second pull plate 120 can generate relative displacement in the horizontal direction, and the two first pull plates 100 and the second pull plate 120 are connected together through the first fixture blocks 101, the magnetorheological elastomers 130 corresponding to the first fixture blocks 101 and the second fixture blocks 121 corresponding to the magnetorheological elastomers 130 which are sequentially connected, so that the second pull plate 120 drives the magnetorheological elastomers 130 to move in the horizontal direction to generate shearing deformation to generate shearing force. When the frame structure of the building is subjected to the action of an earthquake, the horizontal force acts on the building structure to enable the upper floor slab and the lower floor slab to generate relative horizontal displacement, and the inclined strut connected with the upper floor slab and the lower floor slab under the action of the interlayer displacement also generates axial tension and compression, so that the inclined strut damper based on the magnetorheological elastomers and arranged on the inclined strut is subjected to the horizontal force, the relative displacement is generated between the second pull plate 120 and the two first pull plates 100, each magnetorheological elastomer 130 is subjected to horizontal shearing force, the shearing force of the magnetorheological elastomers 130 is transmitted to the building structure through the inclined strut, damping force is provided for the building structure, the damage effect generated by the earthquake is reduced, and the elastic damping effect is realized.
In addition, as shown in fig. 3, when the external wires are used to energize the coil 140 in each of the magnetorheological elastomer assemblies, the generated magnetic induction lines sequentially pass through the magnetorheological elastomer 130, the first fixture block 101, the first pulling plate 100, the sleeve 152, the second pulling plate 120, the sleeve 152, the first pulling plate 100, the first fixture block 101, the magnetorheological elastomer 130, the second fixture block 121, the second pulling plate 120, the second fixture block 121 and the magnetorheological elastomer 130 to form a loop, and when a user changes the input current to the coil 140, the mechanical properties of the corresponding magnetorheological elastomer 130 can be changed to change the self-vibration frequency of the sprag damper based on the magnetorheological elastomer, so as to avoid the occurrence of resonance with an earthquake to reduce the structural strength of the sprag damper, thereby better adapting to the amplitude and deformation changes generated during the earthquake and achieving a damping effect.
In some alternative embodiments, the number of magnetorheological elastomer components disposed between the first and second pulling plates 100, 120 may also be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more than 10. Optionally, when the magnetorheological elastomer components arranged between the first pulling plate 100 and the second pulling plate 120 are arranged, the magnetorheological elastomer components may be arranged in a straight line, or may be arranged in a matrix of at least 2 rows and at least 2 columns; optionally, each magnetorheological elastomer assembly uses 1 independent steel frame 150 as a sleeve 152 sleeved on the coil 140, and of course, the steel frame 150 and at least 1 steel partition plate 151 disposed in the frame 150 may be used to cooperate to form at least 2 sleeves 152 sleeved on the coil 140. In some alternative embodiments, the sleeve 152 may also not be connected to the second pulling plate 120, but a movable sleeve 152 may be provided between the first pulling plate 100 and the second pulling plate 120. Optionally, the magnetorheological elastomer 130 may further adopt rubber such as natural rubber, butadiene rubber and the like to replace silicone rubber, adopt cobalt powder and nickel powder to replace iron powder, and simultaneously may further add a part of additives such as a dispersant and the like when preparing the magnetorheological elastomer 130; optionally, the ferromagnetic material may also be an alloy of Fe.
In some optional embodiments, the magnetorheological elastomer based sprag damper may further include three, four, five or more than five first pulling plates 100 arranged in sequence from top to bottom, a second pulling plate 120 movable relative to the first pulling plates 100 is disposed between every two adjacent first pulling plates 100, at least one magnetorheological elastomer assembly is disposed between each second pulling plate 120 and two adjacent first pulling plates 100, and the magnetorheological elastomer assemblies on both sides of the second pulling plate 120 are symmetrically arranged relative to the second pulling plate 120.
Taking the magnetorheological elastomer-based sprag damper shown in fig. 4 as an example, the sprag damper includes three first pulling plates 100 sequentially arranged from top to bottom, a second pulling plate 120 capable of moving relative to the first pulling plates 100 is disposed between every two adjacent first pulling plates 100, three magnetorheological elastomer components are respectively disposed between each second pulling plate 120 and two adjacent first pulling plates 100, and six magnetorheological elastomer components symmetrically disposed are disposed on the upper and lower sides of each second pulling plate 120; each magnetorheological elastomer component comprises a magnetorheological elastomer 130, a coil 140 which is arranged along the horizontal direction and sleeved on the magnetorheological elastomer 130, and sleeves 152 which are arranged along the horizontal direction and sleeved on the coil 140, frames 150 which are arranged along the horizontal direction are respectively arranged between the second pulling plate 120 and the two first pulling plates 100, two partition plates 151 are arranged in each frame 150, and each frame 150 and the two corresponding partition plates 151 are respectively enclosed to form three sleeves 152; two sides of each second pulling plate 120 respectively protrude to form three second fixture blocks 121, the six second fixture blocks 121 are respectively connected with one ends of the six magnetorheological elastomers 130 on two sides of the second pulling plate 120, and one side of each first pulling plate 100 facing the magnetorheological elastomers 130 respectively protrudes to form a first fixture block 101 connected with the corresponding magnetorheological elastomer 130; an annular gap 160 is formed between the magnetorheological elastomer 130 and the corresponding coil 140, four through holes 153 for wiring the coil 140 are formed in each sleeve 152, and an electric wire (not shown in the figure) extending out of the through hole 153 is connected to the coil 140; the first pulling plate 100, the second pulling plate 120, the first fixture block 101, the second fixture block 121 and the sleeve 152 are all made of steel, and the magnetorheological elastomer 130 is prepared from silicon rubber and carbonyl iron powder. The inclined strut damper based on the magnetorheological elastomers comprises three first pull plates 100 and two second pull plates 120 capable of moving relative to the first pull plates 100, and when the second pull plates 120 generate relative displacement relative to the first pull plates 100, each magnetorheological elastomer 130 can be subjected to horizontal shearing force, so that the shearing force of the magnetorheological elastomers 130 is transmitted to a building structure through an inclined strut to provide large damping force, and the damage effect generated by an earthquake is effectively reduced.
The embodiments described above are some, but not all embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Claims (6)
1. The inclined strut damper based on the magnetorheological elastomers is characterized by comprising at least two first pull plates which are sequentially arranged from top to bottom, wherein a second pull plate capable of moving along the horizontal direction is arranged between every two adjacent first pull plates, at least one magnetorheological elastomer assembly is arranged between the second pull plate and the adjacent first pull plate, and the magnetorheological elastomer assemblies are symmetrically arranged on the upper side and the lower side of the corresponding second pull plate; the magnetorheological elastomer component comprises a magnetorheological elastomer, a coil which is arranged along the horizontal direction and sleeved on the magnetorheological elastomer, and a sleeve which is arranged along the horizontal direction and sleeved on the coil, wherein two ends of the magnetorheological elastomer are respectively connected with the corresponding first pulling plate and the second pulling plate; the first pulling plate, the second pulling plate and the sleeve are all made of ferromagnetic materials.
2. The strut damper based on the magnetorheological elastomer according to claim 1, wherein the first pulling plate is provided with a first fixture block connected with the corresponding magnetorheological elastomer.
3. The strut damper based on the magnetorheological elastomer according to claim 1, wherein the second pulling plate is provided with a second fixture block connected with the corresponding magnetorheological elastomer.
4. The magnetorheological elastomer-based sprag damper of claim 1, wherein an annular gap is provided between the magnetorheological elastomer and the corresponding coil.
5. The magnetorheological elastomer-based sprag damper according to claim 1, wherein the sleeve is connected to the corresponding second pulling plate.
6. The magnetorheological elastomer-based sprag damper according to claim 1, wherein the sleeve is provided with a through hole for wiring the coil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910841370.0A CN110528717B (en) | 2019-09-06 | 2019-09-06 | Inclined strut damper based on magnetorheological elastomer |
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| CN201910841370.0A CN110528717B (en) | 2019-09-06 | 2019-09-06 | Inclined strut damper based on magnetorheological elastomer |
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| CN110528717B true CN110528717B (en) | 2021-03-23 |
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| CN112196939A (en) * | 2020-10-09 | 2021-01-08 | 武汉理工大学 | Cultural relic intelligent shock insulation support based on magnetorheological elastomer |
| CN112943838A (en) * | 2021-01-30 | 2021-06-11 | 上海工程技术大学 | Rigidity and strength adjustable magnetorheological elastomer shock absorber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2002090105A1 (en) * | 2001-05-10 | 2002-11-14 | University Of Toledo | Actively controlled impact elements |
| CN100417773C (en) * | 2006-06-07 | 2008-09-10 | 东南大学 | High lossing energy composite magnetorheopectic damping device |
| CN100363643C (en) * | 2006-06-21 | 2008-01-23 | 天津大学 | Multistep assemblied anti-settle magnetic rheological damper |
| CN102287475B (en) * | 2011-06-10 | 2013-02-27 | 涂建维 | Viscoelastic damper capable of intelligently controlling damping force |
| JP2014052044A (en) * | 2012-09-07 | 2014-03-20 | Tohoku Univ | Mr damper |
| WO2014053025A1 (en) * | 2012-10-04 | 2014-04-10 | University Of Technology, Sydney | Adaptive mre vibration isolation assembly and system |
| CN207687250U (en) * | 2017-11-21 | 2018-08-03 | 山东科技大学 | A kind of MR elastomer vibration isolator based on shearing-tension and compression pattern |
| CN108361311A (en) * | 2018-01-23 | 2018-08-03 | 长安大学 | A kind of mode MR elastomer damper |
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