CN109235688A - A kind of magnetorheological half active stiffness adjustable shock absorber - Google Patents
A kind of magnetorheological half active stiffness adjustable shock absorber Download PDFInfo
- Publication number
- CN109235688A CN109235688A CN201811318962.6A CN201811318962A CN109235688A CN 109235688 A CN109235688 A CN 109235688A CN 201811318962 A CN201811318962 A CN 201811318962A CN 109235688 A CN109235688 A CN 109235688A
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- outer annular
- cylinder
- bourdon tube
- shock absorber
- magnetorheological
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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
- E04H9/0215—Bearing, supporting or connecting constructions specially adapted for such buildings involving active or passive dynamic mass damping systems
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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
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- Architecture (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a kind of magnetorheological half active stiffness adjustable shock absorbers, including the outer annular cylinder being fixed on container inner wall and inner cylinder；Rotatable ball is housed between device bottom plate below inner cylinder, is respectively arranged with magnetorheological fluid in inner cylinder and outer annular cylinder.Hollow bourdon tube is connected between inner cylinder and outer annular cylinder barrel, inside and outside two are connected to by hollow bourdon tube, magnetorheological fluid can be by flowing between hollow bourdon tube inside outer two, magnet exciting coil is installed outside bourdon tube, magnet exciting coil connects with controller and the solar panel being mounted on the outside of upper vessel portion and to form closed circuit, controller receives the signal of acceleration transducer to control the size of electric current in magnet exciting coil, to adjust the rigidity of hollow bourdon tube, horizontal vibration damping control is realized.It is equipped with limit plate between outer annular cylinder and inner cylinder, prevents inner cylinder displacement excessive.It is equipped with damping screen in outer annular cylinder, torsion damping control is realized by damping force.
Description
Technical field
The invention belongs to the vibration control fields of civil engineering, and in particular to the rigidity controllable damping based on magnetorheological fluid
Device is mainly used for controlling the level and torsion vibration response of skyscraper and tall and slender structure.
Technical background
With social progress and development, tall building and highrise structure becomes the construction style being becoming increasingly popular, knot
The direction of structure towards flexibility, toweringization is developed, and tall and slender structure is strong in earthquake and the dynamic response of wind action flowering structure
It is strong, seriously affect safety, applicability and the durability of building.So how to reduce the dynamic response of building, make its tool
There is good wind resistance anti-seismic performance, while meeting beautiful and comfortable requirement and having attracted more and more attention from people.
Adaptable damping mode has much in structural vibration control at present, and wherein tuned mass damper is application
One of widest damping mode.It is usually made of mass block, helical spring and damping system.However, due to by spiral
The constraint of spring self property can not accomplish to change itself damping and rigidity easily to lead to adapt to the damping requirements under varying strength
Cause the vibration frequency of the vibration frequency and structure of damper mutually detuning, the frequency range that can control is relatively narrow.Meanwhile in larger amplitude
In the case of the structural vibration of value, biggish deformation easily occurs for helical spring, is unable to reach the purpose of effective control structure vibration.
Based on disadvantages described above, damper overall construction is not being complicated to and is being guaranteed the condition with good effectiveness in vibration suppression
Under, to realize the optimizing application to conventional helical spring, and adjusts spring rate and wanted with adapting to the control under different oscillation intensities
It asks, it is necessary to traditional damper be improved, propose more superior design principle and more preferably damping mode.It examines simultaneously
Consider the complexity of structural vibration, it is necessary to so that improved damper realizes the vibration control purpose of multidimensional wide frequency domain.
Summary of the invention
It is an object of the present invention to provide a kind of magnetorheological half active stiffness adjustable shock absorbers, it is intended to reduce high-level structure in wind lotus
Load and level and torsion vibration response under geological process, achieve the purpose that passive energy dissipation.
To achieve the above object, the present invention adopts the following technical solutions:
A kind of magnetorheological half active stiffness adjustable shock absorber, including an outer case, are fixed in the outer case
Outer annular cylinder is equipped with internal movable cylinders in the outer annular cylinder inner ring；The inside movable cylinders bottom and outer
Rotatable ball is housed between the bottom plate of cabinet, is used to contain in the inside movable cylinders and outer annular cylinder magnetorheological
Liquid, and along the circumferencial direction of outer annular cylinder, vertical is provided with multiple damping screens；The outer annular cylinder and inside
It is connected between movable cylinders by hollow bourdon tube, so that magnetorheological fluid can be by flowing between hollow bourdon tube inside outer two；
The sun for being equipped with magnet exciting coil, magnet exciting coil and controller outside the bourdon tube and being mounted in device outer surface of upper
Energy solar panel connects to form closed circuit, and controller and acceleration transducer are connected with conducting wire.
Further, it is circumferentially equipped with limit plate between the outer annular cylinder and internal movable cylinders, prevented
Only inner cylinder displacement is excessive.
Further, the inside movable cylinders are sealed with outer annular cylinder, and there are liquid injection holes to be used at top
Liquid is injected, liquid injection hole is plugged with rubber stopper, prevents liquid from splashing out.
Further, the inside movable cylinders are made of stainless steel material, and visual concrete condition increases in cylinder body bottom
It is fixed mass block.
Further, it is coated with lubricating oil between the ball and ball grooves below the inside movable cylinders, is rubbed with reducing
It wipes, bottom of cylinder edge is equipped with limit plate, prevents ball from falling off.
Further, the hollow bourdon tube is made of non-magnetic macromolecular material, hollow bourdon tube and outside
The interface rubber seal of cyclic annular cylinder and inner cylinder, to prevent fluid seepage.
Further, the hollow bourdon tube is respectively set two with Y-direction in X direction.
Further, the outer diameter of the hollow bourdon tube is less than the internal diameter of magnet exciting coil, and there are certain gaps.
Further, the limit plate surface is coated with viscoelastic material, increases the ability of energy by collision.
Further, damping screen is vertically arranged along ring week in the outer annular cylinder, and damping screen is round by outer annular
Cylinder has been separated into multiple chambers.
When specifically used, the magnetorheological fluid liquid height in the inside movable cylinders and outer annular cylinder must reach
Certain limit value, with guarantee its can by being flowed between portion's movable cylinders and outer annular cylinder including hollow bourdon tube, and
The moment possesses magnetorheological fluid in internal movable cylinders and outer annular cylinder.
Working principle of the present invention is as follows:
The damper is mounted on to the top of skyscraper and tall and slender structure, under wind load or geological process, cylinder and
Its internal magnetorheological fluid since inertia moves horizontally, drive hollow bourdon tube occur to stretch and compressive deformation providing and
The opposite damping force of the cylinder direction of motion.When X occurs for structure to when vibration, acceleration induction device receives signal and transmits signal
To controller, controller control solar panel discharges and adjusts the electricity in magnet exciting coil in real time according to the vibration strong or weak of structure
Flow size.After magnet exciting coil is powered, the magnetic field strength in hollow bourdon tube is changed, the mobility and viscosity of magnetorheological fluid occur
Variation so that the rigidity for changing hollow bourdon tube in real time tunes the vibration frequency of itself and structure mutually, and improves output resistance
Buddhist nun's power achievees the purpose that intelligent control structure level vibrates.Simultaneously as the damping force provided is applied to circle by hollow bourdon tube
Cylinder, so that delayed response occurs for cylinder and its internal magnetorheological fluid, so that magnetorheological fluid shakes and collides cylinder inner wall to produce
Raw additional damping power further suppresses the horizontal vibration response of structure.When Y-direction horizontal vibration occurs for structure, damper
Working principle is identical as X-direction horizontal vibration.
When structure generation is reversed along the vertical direction, the magnetorheological fluid in outer annular cylinder flows in cyclic annular cylinder,
Since the limitation of damping screen has adjusted the flow velocity of magnetorheological fluid, so that magnetorheological fluid generates pressure difference in damping screen two sides, thus
The torsion damping force for improving damper offer achievees the purpose that control structure torsional direction vibrates.
The beneficial effects of the present invention are:
(1) semi- active control technical know-how is applied in the design of the damper by the present invention, and using in variation magnetic field
The lower magnetorheological fluid with instantaneous rheological behavior of effect, realizes that the damper realizes intelligence control in wider vibration frequency range
The purpose of system.
(2) present invention abandoned it is traditional determine stiffness helix spring, using hollow bourdon tube and cylinder and its liquid of inside
Body composition damps adjustable tuned mass damper, can change hollow projectile cartridge according to excitation load form and structural response state
The flow behavior of magnetorheological fluid in reed pipe, so that the vibration frequency of tuned mass damper is mutually tuned with structure, to realize
Good effectiveness in vibration suppression.
(3) present invention considers harm of the twisting vibration to safety of structure, is realized using ring-shaped liquid damper to structure
The control of twisting vibration, and output damping force is improved by the way that multiple tracks damping screen is arranged.Meanwhile it can be according to structural vibration control
It is required that selectivity winds hot-wire coil in outer annular drum outer wall, by changing the viscosity of magnetorheological fluid inside cyclic annular cylinder, from
And greatly improve the control effect of the damper.
(4) outer annular cylinder is connected to by the present invention by hollow bourdon tube with cylinder, avoids the damper in prolonged application
There is pressure uneven phenomenon in inside, at the same eliminate be likely to occur in traditional MR damper liquid lock deposition and
" idle stroke " phenomenon, ensure that the reliability of the damper.
(5) while the present invention has good vibration control effect, there is simple structure, flexibility is high and easy to maintain
The advantages that, the seismic wind resistance of structure can be effectively improved, skyscraper and tall and slender structure are suitable for.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.
Fig. 1 is a kind of magnetorheological half active stiffness adjustable shock absorber；
Fig. 2 is A-A sectional view；
Fig. 3 is the detail structure figure of hollow bourdon tube；
In figure: 1 outer container, 2 magnetorheological fluids, 3 hollow bourdon tubes, 4 magnet exciting coils, 5 controllers, 6 acceleration transducers, 7 too
Positive energy solar panel, 8 limit plates, 9 inner cylinders, 10 damping screens, 11 outer annular cylinders, 12 balls, 13 bourdon tube holes, 14 rubber
Plug, 15 ball grooves, 16 ball limit plates, 17 bottom bases, 18 conducting wires.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination；
In order to facilitate narration, if there is "upper", "lower", " left side " " right side " printed words in the present invention, only expression and attached drawing itself
Upper and lower, left and right direction it is consistent, not to structure rise restriction effect, it is only for convenient for description the present invention and simplification retouch
It states, rather than the equipment of indication or suggestion meaning or element must have a particular orientation, and be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.
" inner cylinder " described in the present embodiment and mentioned-above " internal movable cylinders " refers to the same component.
The used matter damper of tuning exists in the prior art in practical engineering applications, the superiority and inferiority degree of effectiveness in vibration suppression relies on it
Whether the natural frequency of vibration mutually tunes with main structure, and cannot be adjusted in real time according to specific external drive situation and structural response certainly
The characteristic of body, thus cannot be guaranteed optimal effectiveness in vibration suppression, in order to solve technical problem as above, present applicant proposes a kind of bases
In half actively controllable rate damper of magnetorheological fluid.
In a kind of typical embodiment of the application, as shown in Figure 1 and Figure 2, one kind proposed by the present invention magnetorheological half is main
Dynamic stiffness adjustable shock absorber is as shown in the figure.The device consists of two parts, and is inner cylinder 9 and to be fixed on 1 bottom of outer case respectively
Outer annular cylinder 11 on portion's pedestal 17.
Inner cylinder 9 is hollow cylinder, and magnetorheological fluid 2 is housed, has ball 12,9 bottom plate of inner cylinder below inner cylinder 9
Under have the ball grooves 15 rolled for ball 12, ball limit plate 16 is housed on the outside of inner cylinder lower circumference.9 outside of inner cylinder
Equipped with four pieces of limit plates 8, limit plate 8 is fixed on bottom of device.
The outer annular cylinder 11 be it is hollow, inside be equipped with magnetorheological fluid 2, inside along ring week be arranged damping screen 10.
The outer annular cylinder 11 is connect with inner cylinder 9 by hollow bourdon tube 3, and bourdon tube 3 passes through inner cylinder 9 and external rings
Bourdon tube hole 13 and two reservoirs on 11 chamber wall of shape cylinder can make magnetorheological fluid 2 by hollow bourdon tube 3 at two
It is flowed between container.Magnet exciting coil 4 is housed, magnet exciting coil 4 is fixed on the pedestal of bottom of device, excitation outside hollow bourdon tube 3
Coil 4 and controller 5 and the solar panel 7 for being mounted on device top outer connect to form closed circuit, controller 5 with plus
Velocity sensor 6 is connected by conducting wire 18, receives the signal that acceleration transducer 6 transmits.
Further, in the present embodiment, the inner cylinder 9 is made of stainless steel material, and visual concrete condition exists
Its bottom installation quality block；It is coated with lubricant between ball 12 and ball grooves 15, to reduce friction.
Further, in the present embodiment, the inner cylinder 9 and outer annular cylinder 11 be sealing, top there are
The circular hole of rubber stopper 14 is plugged with to facilitate injection magnetorheological fluid 2.
Further, in the present embodiment, the hollow bourdon tube 3 is made of non-magnetic macromolecular material, bullet
The 13 junction rubber seal of hole at reed pipe both ends and outer annular cylinder 11 and inner cylinder 9, prevents fluid seepage；Specifically
Structure is as shown in Figure 3；
Further, in the present embodiment, the hollow bourdon tube 3 is respectively arranged two with Y-direction in X direction, tool
In other embodiments, the setting number of hollow bourdon tube 3 can be configured body according to actual needs, be not limited to this Shen reality
Apply the number in example.
Further, in the present embodiment, 3 outer diameter of hollow bourdon tube need to be less than the internal diameter of magnet exciting coil 4, the two
Between there are certain gaps.
Further, in the present embodiment, 8 inner surface of limit plate is coated with viscoelastic material, increases collision
Frictional force, to reach better energy consumption effect.
Further, in the present embodiment, the damping screen in the outer annular cylinder 11 is vertically arranged along ring week, damping
Outer annular cylinder has been separated into multiple chambers by net.Further, which can be arranged at outer annular cylinder damping screen and encourage
Magnetic coil connection is connected into closed circuit with solar panel 7 and controller 5, simple MR damper is formed, to reach
To better anti-torsion effect.
In this embodiment scheme, controller 5 is preferably controlled using existing single-chip microcontroller.
When specifically used, the magnetorheological fluid liquid height in internal movable cylinders and outer annular cylinder must reach certain
Limit value, to guarantee that it can be by flowing between portion's movable cylinders and outer annular cylinder including hollow bourdon tube, and inside can
The moment possesses magnetorheological fluid in dynamic cylinder and outer annular cylinder.In the present embodiment, the internally positioned movable cylinders of hollow bourdon tube 3
With outer annular cylinder lean on bottom position, as long as therefore magnetorheological fluid liquid be higher than this position.
In the present embodiment, it should determine that the half actively controllable rigidity based on magnetorheological fluid is hindered according to the concrete condition of structure
The installation site and quantity of Buddhist nun's device, to reach optimal effectiveness in vibration suppression.
The present invention is on the basis of tuned mass damper, according to the principle for tuning used matter damper, by adjusting input
To the size of current of magnet exciting coil 4, the viscosity of magnetorheological fluid 2 is adjusted to make spring rate be adjusted at any time.X occurs for structure
To or Y-direction vibrate when, acceleration transducer 6 receives signal, signal is passed to the controller 5 in circuit, controller controls too
Positive energy solar panel 7 electric discharge is to adjust the size of current in magnet exciting coil 4 to control the rigidity of spring, spring limits inner cylinder
Movement of 9 (mass blocks) along X or Y-direction.The device according to the size of structure acceleration come adjustment spring rigidity, to control matter
The vibration of gauge block achievees the purpose that horizontal direction vibration damping controls；The lasting energy supply of solar panel realization device, nothing are utilized simultaneously
Need to change battery.
Liquid when structure twists in outer annular cylinder 11 flows through damping screen 10, generates to act on damping screen and be used to
Property power, liquid damping screen two sides phase difference provide liquid motion restoring force.Inertia force is acted on by cabinet transmitting
Control force in structure, offsets with external force, can weaken the influence reversed to building.
If better torsion damping effect need to be realized, it can be equipped on the outside of outer annular cylinder 11 at damping screen and add excitation
Coil, magnet exciting coil connect to form closed circuit with controller 5 and solar panel 7, controller 5 and acceleration induction device phase
Connection collects mail number control electric discharge of solar panel 7 to adjust size of current in magnet exciting coil, so as to adjust damping screen 10 is flowed through
Magnetorheological fluid 2 viscosity, form simple magnetic rheological liquid damper, and increase the effect of torsion control.
The embodiment above of the invention is not limiting the scope of the present invention, and embodiments of the present invention are unlimited
In this, all such above contents according to the present invention are not departing from this according to the ordinary technical knowledge and customary means of this field
Modification, replacement or change under the premise of inventing above-mentioned basic fundamental thought, to other diversified forms that above structure of the present invention is made
More, it should all fall within the scope and spirit of the invention.
Claims (10)
1. a kind of magnetorheological half active stiffness adjustable shock absorber, which is characterized in that including an outer case, in the outer case
It is inside fixed with outer annular cylinder, is equipped with internal movable cylinders in the outer annular cylinder inner ring；The inside movable cylinders
Rotatable ball is housed between bottom and the bottom plate of outer case, is used to contain in the inside movable cylinders and outer annular cylinder
Magnetorheological fluid is filled, and along the circumferencial direction of outer annular cylinder, vertical is provided with multiple damping screens；The outer annular cylinder
And be connected between internal movable cylinders by hollow bourdon tube, so that magnetorheological fluid can be two outer inside by hollow bourdon tube
Between flow；Magnet exciting coil, magnet exciting coil and controller are installed outside the bourdon tube and are mounted on device outer surface of upper
On solar panel connect to form closed circuit, controller and acceleration transducer are connected with conducting wire.
2. magnetorheological half active stiffness adjustable shock absorber as described in claim 1, which is characterized in that the outer annular cylinder
Limit plate is circumferentially equipped between inner cylinder.
3. magnetorheological half active stiffness adjustable shock absorber as claimed in claim 2, which is characterized in that the limit plate surface
It is coated with viscoelastic material, increases the ability of energy by collision.
4. magnetorheological half active stiffness adjustable shock absorber as described in claim 1, which is characterized in that the inner cylinder with
Outer annular cylinder seals, and there are liquid injection hole, the liquid injection holes to pass through a rubber stopper sealing at top.
5. magnetorheological half active stiffness adjustable shock absorber as described in claim 1, which is characterized in that movably justify the inside
Cylinder is made of stainless steel material, and visual concrete condition increases fixed mass block in cylinder body bottom.
6. magnetorheological half active stiffness adjustable shock absorber as described in claim 1, which is characterized in that under the inner cylinder
Lubricating oil is coated between the ball and ball grooves of side.
7. magnetorheological half active stiffness adjustable shock absorber as described in claim 1, which is characterized in that the inner cylinder bottom
Portion edge is equipped with limit plate.
8. magnetorheological half active stiffness adjustable shock absorber as described in claim 1, which is characterized in that the hollow bourdon tube
It is made of non-magnetic macromolecular material, hollow bourdon tube and the interface rubber of outer annular cylinder and inner cylinder are close
Envelope.
9. magnetorheological half active stiffness adjustable shock absorber as described in claim 1, which is characterized in that the hollow bourdon tube
Two are respectively set with Y-direction in X direction.
10. magnetorheological half active stiffness adjustable shock absorber as described in claim 1, which is characterized in that the hollow spring
The outer diameter of pipe is less than the internal diameter of magnet exciting coil, and there are certain gaps.
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| CN201811318962.6A CN109235688B (en) | 2018-11-07 | 2018-11-07 | A kind of magnetorheological half active stiffness adjustable shock absorber |
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| CN201811318962.6A CN109235688B (en) | 2018-11-07 | 2018-11-07 | A kind of magnetorheological half active stiffness adjustable shock absorber |
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| CN109235688B CN109235688B (en) | 2019-04-19 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319150A (en) * | 2019-06-28 | 2019-10-11 | 南京理工大学 | Magnetic rheology elastic body-magnetorheological fluid compound vibration-damper for whirling vibration |
| CN110499932A (en) * | 2019-07-08 | 2019-11-26 | 由中国 | A kind of steel structure supporting system applied to high-rise assembled architecture |
| CN110524057A (en) * | 2019-06-26 | 2019-12-03 | 马鞍山聚力科技有限公司 | It is a kind of to provide the NC cutting tool of damping using Micro Lub and Mass Distribution |
| CN110685370A (en) * | 2019-10-30 | 2020-01-14 | 株洲时代新材料科技股份有限公司 | Device for improving synchronism of viscous damper |
| CN110920336A (en) * | 2019-12-12 | 2020-03-27 | 丰宗贵 | Automobile shock-absorbing device |
| CN110960105A (en) * | 2019-11-25 | 2020-04-07 | 郑州三骏能源科技有限公司 | Energy-concerving and environment-protective type barbecue equipment |
| CN111042370A (en) * | 2019-12-27 | 2020-04-21 | 山东大学 | Semi-active negative stiffness multidimensional vibration damper |
| CN111236460A (en) * | 2020-01-17 | 2020-06-05 | 山东大学 | Multidimensional self-powered magnetorheological vibration damper |
| CN111236459A (en) * | 2020-01-15 | 2020-06-05 | 山东大学 | Semi-active porous self-energy-supply multi-dimensional shock absorber |
| CN111305408A (en) * | 2020-02-28 | 2020-06-19 | 山东大学 | Multidimensional integrated semi-active magneto-rheological vibration damper |
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| CN110524057A (en) * | 2019-06-26 | 2019-12-03 | 马鞍山聚力科技有限公司 | It is a kind of to provide the NC cutting tool of damping using Micro Lub and Mass Distribution |
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| CN110499932A (en) * | 2019-07-08 | 2019-11-26 | 由中国 | A kind of steel structure supporting system applied to high-rise assembled architecture |
| CN110685370A (en) * | 2019-10-30 | 2020-01-14 | 株洲时代新材料科技股份有限公司 | Device for improving synchronism of viscous damper |
| CN110960105A (en) * | 2019-11-25 | 2020-04-07 | 郑州三骏能源科技有限公司 | Energy-concerving and environment-protective type barbecue equipment |
| CN110920336A (en) * | 2019-12-12 | 2020-03-27 | 丰宗贵 | Automobile shock-absorbing device |
| CN110920336B (en) * | 2019-12-12 | 2024-03-22 | 丰宗贵 | Automobile damping device |
| CN111042370B (en) * | 2019-12-27 | 2021-03-12 | 山东大学 | Semi-active negative stiffness multidimensional vibration damper |
| CN111042370A (en) * | 2019-12-27 | 2020-04-21 | 山东大学 | Semi-active negative stiffness multidimensional vibration damper |
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| CN111305408A (en) * | 2020-02-28 | 2020-06-19 | 山东大学 | Multidimensional integrated semi-active magneto-rheological vibration damper |
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| CN115163723B (en) * | 2022-08-11 | 2023-06-09 | 甘肃盛宏建筑工程有限责任公司 | Magneto-rheological variable damping vibration attenuation energy consumption device |
| CN115370696A (en) * | 2022-08-22 | 2022-11-22 | 武汉理工大学 | Vibration control TMD device, method and system based on magnetorheological elastomer |
| CN115370696B (en) * | 2022-08-22 | 2024-05-28 | 武汉理工大学 | Vibration control TMD device, method and system based on magnetorheological elastomer |
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