CN107989217B - Spatial grid structure distributed built-in rod type collision damper - Google Patents
Spatial grid structure distributed built-in rod type collision damper Download PDFInfo
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- CN107989217B CN107989217B CN201711074602.1A CN201711074602A CN107989217B CN 107989217 B CN107989217 B CN 107989217B CN 201711074602 A CN201711074602 A CN 201711074602A CN 107989217 B CN107989217 B CN 107989217B
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- 239000000463 material Substances 0.000 claims abstract description 14
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 3
- 230000005284 excitation Effects 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000013016 damping Methods 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 239000003190 viscoelastic substance Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
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
- 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
-
- 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
- E04H9/0235—Anti-seismic devices with hydraulic or pneumatic damping
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The application provides a distributed built-in rod type collision damper with a space grid structure, and belongs to the technical field of earthquake resistance and wind resistance of constructional engineering. The damper comprises a damper cavity unit, a mass block, a limiting plate, a connecting spring, a guide rod, a viscoelastic buffer material and sliding balls. The damper cavity unit is a hollow rod piece; the guide rod is axially fixed in the damping cavity unit, the connecting spring, the mass block and the limiting plate sequentially penetrate through the guide rod, and the outer surfaces of the mass block and the limiting plate are stuck with viscoelastic buffer materials; the junction of quality piece and guide bar is equipped with the slip ball. When the main structure of the damper vibrates, the mass block and the main structure generate relative motion, and when the mass block does not collide with the limiting plate, the damper is equivalent to the traditional TMD, and each damper is tuned to different natural frequencies, so that vibration of different vibration modes can be damped; when the mass block collides with the limiting plate, energy can be consumed through collision. The damper can be applied to the fields of earthquake resistance and wind resistance of building engineering.
Description
Technical Field
The application belongs to the technical field of vibration reduction and wind resistance of constructional engineering, and particularly relates to a distributed built-in rod type collision damper with a space grid structure.
Background
In recent years, the vibration damping control technology of the tuned mass damper and the energy dissipation vibration damper has been widely used because of the advantages of simple structural form, remarkable vibration damping effect, definite vibration damping and energy consumption mechanism, no need of external energy application, easy realization and the like. The space grid structure is easy to be influenced by wind or earthquake due to the large span and small vertical rigidity, the three-dimensional space characteristics are obvious, and the dynamic response vibration mode is dense.
However, the currently common tuned mass damper or collision damper is mostly arranged at the top or bottom of a building structure, has larger mass and volume, has concentrated action range, only controls a few first vibration modes, has narrower effective bandwidth and has no obvious vibration control effect on a large-span space structure. The traditional tuned mass damper or collision damper takes the external structure as a mass block, occupies the internal space of the main structure, and can cause large local dead weight difference of the main structure, and uneven stress of the rod piece and the node. The inner space of the space grid structure rod piece can be used as a cavity structure of the damper, so that the space is fully utilized, and the cost of the damper is reduced. Therefore, the energy dissipation and vibration reduction device adopts a space grid structure distributed built-in rod type collision damper mode, absorbs structural kinetic energy through the mass block, and then collides with the limiting plate to dissipate energy, so that the energy dissipation and vibration reduction purpose is achieved, and the energy dissipation and vibration reduction device has great significance for energy dissipation and vibration reduction of actual engineering.
Disclosure of Invention
The application aims to solve the problem that the traditional collision damper is not suitable for vibration control of a large-span space grid structure, and aims to provide a distributed built-in rod type collision damper of a space grid structure, wherein a collision system is arranged in a rod piece of the space grid structure to transfer and dissipate energy. The damper has the advantages of simple structure, easy implementation and good vibration reduction performance. The dampers are distributed in each rod piece of the main structure, when the main structure vibrates, the mass block and the main structure generate relative motion, when the mass block does not collide with the limiting plate, the damper is equivalent to the traditional tuned mass damper (Tuned Mass Damper TMD), and the kinetic energy of the main structure is transmitted to the mass block through the spring, so that the kinetic energy of the main structure is reduced, and each damper is tuned to different natural frequencies and can damp different vibration modes; when the mass block collides with the limiting plate, the mass block collides with the limiting plate to dissipate energy, and the viscoelastic material outside the mass block and the limiting plate generates nonlinear deformation in the collision, so that the energy dissipation in the collision is increased.
The technical scheme of the application is as follows:
a distributed built-in rod type collision damper with a space grid structure comprises a damper cavity unit, a mass block, a limiting plate, a connecting spring, a guide rod, a viscoelastic buffer material and sliding balls; the built-in rod type collision dampers are distributed in the space grid structure;
the damper cavity unit is a hollow rod piece; the guide rod is axially fixed in the damper cavity unit, the connecting spring, the mass block and the limiting plate sequentially penetrate through the guide rod, one end of the connecting spring is fixed on the guide rod, the other end of the connecting spring is connected with the mass block, the mass block slides along the guide rod, the limiting plate is fixedly connected with the guide rod, and the limiting plate collides with the mass block to dissipate energy; the outer surfaces of the mass block and the limiting plate are stuck with viscoelastic buffer materials; the junction of quality piece and guide bar is equipped with the slip ball, and the slip ball slides along the guide bar for reduce friction.
The mass block and the limiting plate are solid iron blocks.
The sliding ball is made of stainless steel, and the surface of the sliding ball is coated with a lubricating material.
The viscoelastic buffer material is rubber, foam plastic or knitting cotton.
The total mass of all the mass blocks in the space grid structure is 1% -3% of the total mass of the space grid structure, and the mass of a single mass block is determined according to the number of the dampers in the space grid structure; the rigidity k of the connecting spring i By the formulaTo calculate, wherein f i The frequency of the ith damper is the modal frequency of the spatial grid structure to be controlled, m i Is the mass of the mass block in the ith damper.
The distance between the mass block and the limiting plate is determined according to the mass of the mass block and external load excitation, and the larger the mass block of the damper is, the larger the distance is, and in application and installation, the adjustment can be performed according to the control effect.
The frequency f of the damper i The method is characterized in that the method is determined according to modal analysis of a space grid structure, the mass participation coefficients of the vibration modes are obtained through the modal analysis, the control vibration mode is the first-order vibration mode with larger mass participation coefficient of the vibration mode, the sum of the accumulated mass participation coefficients of the control vibration mode is greater than or equal to 90%, and the frequency of the damper is the frequency of the control vibration mode.
Working principle: the dampers are distributed in each rod piece of the space truss, when the space truss vibrates, the mass blocks and the space truss generate relative motion, when the mass blocks do not collide with the limiting plates, the damper is equivalent to a traditional tuned mass damper (Tuned Mass Damper TMD), and the kinetic energy of the space truss structure is transmitted to the mass blocks through the springs, so that the kinetic energy of the space truss structure is reduced, and each damper is tuned to different natural frequencies and can damp different vibration modes; when the mass block collides with the limiting plate, the mass block collides with the limiting plate to dissipate energy, and the viscoelastic material outside the mass block and the limiting plate generates nonlinear deformation in the collision, so that the energy dissipation in the collision is increased.
The application has the beneficial effects that:
1. the method has definite application objects, and is suitable for the earthquake or wind-induced vibration control of the space grid structure with dense vibration patterns and obvious space characteristics.
2. The structure is simple, the hollow characteristics of the rod piece with the large-span space structure are fully utilized, a single large mass block is divided into a plurality of small mass blocks, the small mass blocks are distributed in different rod pieces according to a certain rule, the space and the manufacturing cost are saved, the engineering manufacture, the installation and the use are convenient, and the large mass block is easier to popularize in engineering construction.
3. The vibration-damping device can damp vibration of the vibration mode with large modal contribution of the space grid structure, and has an ideal vibration-damping frequency bandwidth.
4. The energy consumption mechanism is simple, when the mass block is not collided with the limiting plate, the kinetic energy of the space grid structure is transmitted to the mass block through the spring, and therefore the kinetic energy of the space grid structure is reduced, and each damper is tuned to different natural frequencies and can damp different vibration modes; when the mass block collides with the limiting plate, the mass block collides with the limiting plate to dissipate energy, and the viscoelastic material outside the mass block and the limiting plate generates nonlinear deformation in the collision, so that the energy dissipation in the collision is increased.
Drawings
Fig. 1 is a top view of a spatial grid structure built-in rod type crash damper according to the present application.
Figure 2 is a cross-sectional view of the mass of the present application along the axial direction of the shaft.
Figure 3 is a cross-sectional view of a mass according to the present application.
FIG. 4 is a cross-sectional view of the spacing block of the present application along the axial direction of the rod.
Fig. 5 is a cross-sectional view of a limiting plate of the present application.
Fig. 6 is an exemplary top view of the arrangement of the present application in a space grid.
Fig. 7 is a cross-sectional view of an example of the arrangement of the present application in a space grid.
In the figure: 1 a damper cavity unit; 2 mass blocks; 3, limiting plates; 4, connecting a spring; 5, a guide rod; 6 a viscoelastic cushioning material; 7 sliding balls.
Detailed Description
The following describes in detail the embodiments of the present application with reference to the drawings.
Example 1: as shown in fig. 1, the spatial grid structure distributed built-in rod type collision damper mainly comprises a damper cavity unit 1, a mass block 2, a limiting plate 3, a connecting spring 4, a guide rod 5, a viscoelastic buffer material 6 and a sliding ball 7.
As shown in fig. 2 and 3, sliding balls are arranged between the mass block and the guide rod, friction between the mass block and the guide rod is reduced, and lubricant is coated on the sliding balls to reduce abrasion.
As shown in fig. 4 and 5, the limiting plate is fixedly connected with the guide rod.
As shown in fig. 6 and 7, the damper can be arranged at any position in a space grid structure, and the thick line in the drawing is an example diagram of the damper. The specific position in the actual engineering can be according to the dynamic response of the space grid structure to the vibration mode participation coefficient, through the vibration mode participation coefficient or the main vibration mode needing to be controlled, the damper is arranged at the vibration mode antinode of each main vibration mode.
The damper cavity unit 1 is a rod piece of a space grid structure, a fixed guide rod 5 is arranged in a cavity, a connecting spring 4 is arranged on the rod piece, a mass block 2 and a limiting plate 3 are arranged on the cavity, one end of the connecting spring 4 is fixedly connected with the guide rod 5, the other end of the connecting spring is connected with the mass block 2, a sliding ball 7 is arranged between the mass block 2 and the guide rod 5, and the limiting plate 3 is fixedly connected with the guide rod 4. The mass block and the limiting plate are annular solid iron blocks, the shape and the length of the mass block and the limiting plate are determined by the rod member system characteristics of the space grid structure, the mass of the mass block and the length of the spring are related to the frequency of the space grid structure, the vibration mode participation coefficient of the mass block and the spring is obtained according to the dynamic response of the space grid structure, the main vibration mode to be controlled is obtained through the vibration mode participation coefficient, and therefore the frequency of each damper is determined, and the mass of the mass block and the rigidity of the spring are also determined. The sliding ball is made of stainless steel, and the surface of the sliding ball is coated with a lubricating material. The distance between the mass block 2 and the limiting plate 3 is determined according to the mass of the mass block and external load excitation, and the larger the mass block of the damper is, the larger the distance is, and in application and installation, the adjustment can be performed according to the control effect. The viscoelastic cushioning material (6) is any one or more of rubber, foam or knitted cotton.
Claims (3)
1. The distributed built-in rod type collision damper with the space grid structure is characterized by comprising a damper cavity unit (1), a mass block (2), a limiting plate (3), a connecting spring (4), a guide rod (5), a viscoelastic buffer material (6) and sliding balls (7); the built-in rod type collision dampers are distributed in the space grid structure;
the damper cavity unit (1) is a hollow rod piece; the guide rod (5) is axially fixed in the damper cavity unit (1), the connecting spring (4), the mass block (2) and the limiting plate (3) sequentially penetrate through the guide rod (5), one end of the connecting spring (4) is fixed on the guide rod (5), the other end of the connecting spring is connected with the mass block (2), the mass block (2) slides along the guide rod (5), the limiting plate (3) is fixedly connected with the guide rod (5), and the limiting plate (3) and the mass block (2) collide to dissipate energy; the outer surfaces of the mass block (2) and the limiting plate (3) are stuck with a viscoelastic buffer material (6); the connecting part of the mass block (2) and the guide rod (5) is provided with a sliding ball (7), the sliding ball (7) slides along the guide rod (5) and is used for reducing friction, and the sliding ball (7) is made of stainless steel;
the total mass of all the mass blocks (2) in the space grid structure is 1% -3% of the total mass of the space grid structure, and the mass of each mass block (2) is determined according to the number of the dampers in the space grid structure; the distance between the mass block (2) and the limiting plate (3) is determined according to the mass of the mass block and external load excitation;
the rigidity k of the connecting spring (4) i By the formulaTo calculate, wherein f i The frequency of the ith damper is the modal frequency of the spatial grid structure to be controlled, m i Is the mass of the mass block (2) in the ith damper;
the built-in rod type collision dampers are distributed in each rod piece of the space grid structure, when the space grid structure vibrates, the mass block (2) and the space grid structure generate relative motion, when the mass block (2) does not collide with the limiting plate (3), the mass block is equivalent to the traditional tuned mass damper, the kinetic energy of the space grid structure is transmitted to the mass block (2) through the connecting spring (4), the kinetic energy of the space grid structure is reduced, the dampers are tuned to different natural frequencies, and vibration is reduced for different vibration modes; when the mass block (2) collides with the limiting plate (3), the mass block (2) collides with the limiting plate (3) mutually to dissipate energy, and the viscoelastic buffer material (6) outside the mass block (2) and the limiting plate (3) generates nonlinear deformation in the collision, so that the energy dissipation in the collision is increased.
2. The distributed built-in rod type collision damper with the spatial grid structure according to claim 1, wherein the mass block (2) and the limiting plate (3) are solid iron blocks.
3. A spatial grid structure distributed built-in rod type crash damper according to claim 1 or 2, wherein the viscoelastic cushioning material (6) is rubber, foam or knitted cotton.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711074602.1A CN107989217B (en) | 2017-11-06 | 2017-11-06 | Spatial grid structure distributed built-in rod type collision damper |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711074602.1A CN107989217B (en) | 2017-11-06 | 2017-11-06 | Spatial grid structure distributed built-in rod type collision damper |
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| CN107989217A CN107989217A (en) | 2018-05-04 |
| CN107989217B true CN107989217B (en) | 2023-11-17 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110500468A (en) * | 2019-07-26 | 2019-11-26 | 武汉地震工程研究院有限公司 | A kind of building pipe structural collision tuned mass damping device |
| CN113517646A (en) * | 2021-03-19 | 2021-10-19 | 江门明浩电力工程监理有限公司 | 10kv oil-immersed transformer grounding dismounting fence and floor type transformation distribution equipment |
| CN113638514A (en) * | 2021-08-18 | 2021-11-12 | 武汉理工大学 | Semi-active tuned mass damper based on magnetorheological elastomer |
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| CN205617596U (en) * | 2016-05-09 | 2016-10-05 | 福州大学 | Vertical harmonious mass damper structure of elastic collision of gluing |
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| CN207376863U (en) * | 2017-11-06 | 2018-05-18 | 大连理工大学 | A kind of space grid structure distribution built-in bar-type impact damper |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101950160B1 (en) * | 2010-12-29 | 2019-02-19 | 뉴포트 코포레이션 | Tunable vibration dampers and methods of manufacture and tuning |
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Patent Citations (4)
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| CN205617596U (en) * | 2016-05-09 | 2016-10-05 | 福州大学 | Vertical harmonious mass damper structure of elastic collision of gluing |
| CN107060125A (en) * | 2017-03-22 | 2017-08-18 | 东南大学 | A kind of tuned mass damper device |
| CN106939653A (en) * | 2017-05-06 | 2017-07-11 | 湖南科技大学 | One side viscoplasticity collides tuned mass damper and its Parameters design |
| CN207376863U (en) * | 2017-11-06 | 2018-05-18 | 大连理工大学 | A kind of space grid structure distribution built-in bar-type impact damper |
Non-Patent Citations (2)
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