CN114108859B - Tension-compression type grid reinforced viscoelastic damper - Google Patents
Tension-compression type grid reinforced viscoelastic damper Download PDFInfo
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- CN114108859B CN114108859B CN202111281343.6A CN202111281343A CN114108859B CN 114108859 B CN114108859 B CN 114108859B CN 202111281343 A CN202111281343 A CN 202111281343A CN 114108859 B CN114108859 B CN 114108859B
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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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- 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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- Vibration Dampers (AREA)
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Abstract
The invention discloses a tension-compression type grid reinforced viscoelastic damper, which comprises: the energy dissipation vibration reduction device comprises an outer cylinder barrel, a piston plate, energy dissipation vibration reduction components and guide rods, wherein the piston plate is arranged in an inner cavity of the outer cylinder barrel and is in sliding connection with the wall of the inner cavity, the energy dissipation vibration reduction components are symmetrically arranged on the left side and the right side of the piston plate and are arranged in a bilateral symmetry mode by taking the piston plate as a center, the guide rods are located at the axis positions of the energy dissipation vibration reduction components and extend to the outsides of the energy dissipation vibration reduction components on the two sides respectively, and the energy dissipation vibration reduction components are of a topological grid reinforcing structure and are formed by high-temperature high-pressure vulcanization of high-dissipation viscoelastic materials. The invention adopts a topological mesh reinforced structure and a high-dissipation viscoelastic material to combine together to dissipate energy and reduce vibration. Meanwhile, the outer cylinder barrel and the topological mesh reinforcing structure play a role in protecting and reinforcing the viscoelastic material, and the ultimate deformation capacity of the viscoelastic damper is obviously enhanced.
Description
Technical Field
The invention relates to a composite enhanced energy dissipation and vibration reduction device, in particular to a tension-compression type grid enhanced viscoelastic damper.
Background
The viscoelastic damper is used as an energy dissipation and vibration reduction device which is applied earlier, and has a great amount of application in structural shock absorption and disaster reduction and post-earthquake maintenance and reinforcement. The common viscoelastic damper is a shear-type plate damper, and the performance of the viscoelastic damper is greatly influenced by changes of ambient temperature, external load frequency and displacement amplitude. Under larger extreme deformation, the viscoelastic energy consumption layer of the damper often cracks and breaks obviously with a force transmission steel plate, so that the service performance and the service life of the damper are greatly reduced, and the engineering application of the viscoelastic damper is greatly restricted.
In order to improve the service performance of the viscoelastic damper under higher temperature and larger ultimate deformation, the damper needs to be improved and reinforced from the aspects of materials, damper construction, design and the like.
Disclosure of Invention
The purpose of the invention is as follows: the technical problem to be solved by the invention is to provide a tension-compression type grid-reinforced viscoelastic damper, which dissipates seismic energy by adopting a method of combining the viscoelastic damper with a grid-reinforced structure, and can obtain a novel viscoelastic damping device with large deformation, better safety and stability in a wide temperature range and longer service life. The damper has the advantages of strong energy consumption, wide working temperature range, and good recoverability under extreme deformation, equipment safety and working stability.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a tension-compression mesh-enhanced viscoelastic damper comprising:
one end of the outer cylinder barrel is connected with the cover plate, and the other end of the outer cylinder barrel is connected with the first connecting plate;
the piston plate is arranged in the inner cavity of the outer cylinder barrel and can move back and forth in the inner cavity of the outer cylinder barrel along the axial direction of the outer cylinder barrel;
a baffle plate fixedly disposed in the outer cylinder and located between the piston plate and the first connecting plate; a limiting cavity is formed between the baffle and the first connecting plate;
the viscoelastic vibration damping components are arranged in a piston cavity of the outer cylinder barrel and comprise two viscoelastic vibration damping components, namely a first viscoelastic vibration damping component positioned between the cover plate and the piston plate and a second viscoelastic vibration damping component positioned between the piston plate and the baffle plate;
one end of the first guide rod is connected with the second connecting plate on the outer side of the cover plate, and the other end of the first guide rod extends into the inner cavity of the outer cylinder barrel and penetrates through the first viscoelastic vibration damping part to be connected with one side of the piston plate;
one end of the second guide rod is connected with the other side of the piston plate and is coaxially arranged with the first guide rod, and the other end of the second guide rod sequentially penetrates through the second viscoelastic vibration damping part and the baffle plate and then extends into the limiting cavity;
when the guide rod and the outer cylinder barrel are axially and relatively dislocated, the viscoelastic damping component positioned on one side of the piston plate is compressed, and the viscoelastic damping component positioned on the other side of the piston plate is stretched;
the viscoelastic vibration damping component is formed by a topological mesh reinforced structure and a high-dissipation viscoelastic material through high-temperature and high-pressure vulcanization.
The topological mesh reinforced structure is made of steel.
The topological mesh reinforced structure is made of shape memory alloy materials.
The first viscoelastic vibration damping component and the cover plate, the first viscoelastic vibration damping component and the piston plate, the second viscoelastic vibration damping component and the piston plate and the second viscoelastic vibration damping component and the baffle plate are tightly bonded through adhesives.
The viscoelastic damping component is consistent with the cross-sectional shape and the size of the piston plate.
First annular gaps are formed between the side wall of the viscoelastic vibration damping part and the side wall of the inner cavity of the outer cylinder barrel and between the outer side surface of the piston plate and the side wall of the inner cavity of the outer cylinder barrel, and the first annular gaps are 0.2-2mm;
the axis of the viscoelastic vibration damping component is provided with a shaft hole for the guide rod to pass through, a second annular gap is formed between the hole wall of the shaft hole and the outer wall of the guide rod, and the second annular gap is 0.2-2mm.
The cross section of the outer cylinder barrel is circular or square.
The topological mesh reinforcing structure is in a regular polyhedron, annular column, rectangular column or honeycomb-shaped unit cell framework configuration.
Has the advantages that:
the topological mesh reinforced structure and the high-dissipation viscoelastic material are combined to perform energy dissipation and vibration reduction together. The topological mesh reinforced structure is made of Shape Memory Alloy (SMA), and has excellent deformation recoverability and vibration damping and energy absorption characteristics. The topological mesh reinforced structure generates elastic deformation under a small displacement amplitude value, and the viscoelastic material and the topological mesh reinforced structure synchronously deform and dissipate energy; under the large displacement amplitude, the topological grid reinforcing structure generates elastic-plastic deformation hysteresis energy consumption, the viscoelastic material and the topological grid reinforcing structure jointly dissipate energy and reduce vibration, meanwhile, the outer cylinder barrel, the cover plate and the topological grid reinforcing structure play a role in protecting and reinforcing the viscoelastic material, and the ultimate deformation capacity of the viscoelastic damper is greatly improved.
The tension-compression type grid reinforced viscoelastic damper has excellent ultimate deformation and energy consumption capability, a wider application temperature range, and obvious improvement on the safety, reliability and service life of equipment in service period compared with the conventional damper. Therefore, the tension-compression type grid reinforced viscoelastic damper has great potential in the aspects of shock insulation and absorption of building structures, wind vibration suppression, vibration control of mechanical equipment and the like, and can generate great social and economic benefits.
Drawings
Fig. 1 is a schematic structural diagram of a topological mesh reinforcing structure in embodiment 1 of the tension-compression type mesh-reinforced viscoelastic damper of the present invention.
Fig. 2 is a schematic structural diagram of a cavity and a grid structure of a tension-compression type grid-reinforced viscoelastic damper in embodiment 1 of the invention.
Fig. 3 is a schematic diagram of the internal structure of embodiment 1 of the tension-compression type mesh-reinforced viscoelastic damper of the invention.
Fig. 4 is a schematic structural diagram of a topological space metal mesh structure in embodiment 2 of the tension-compression type mesh-enhanced viscoelastic damper of the present invention.
Fig. 5 is a schematic structural diagram of a cavity and a grid structure of a tension-compression type grid-reinforced viscoelastic damper in embodiment 2 of the invention.
Fig. 6 is a schematic view of the internal structure of the tension-compression type mesh-reinforced viscoelastic damper of example 2 of the present invention.
The figure has the following components: the device comprises an outer cylinder barrel 1, a piston plate 2, a first guide rod 3-1, a second guide rod 5-2, a cover plate 4, a first connecting plate 5-1, a second connecting plate 5-2, a topological grid reinforcing structure 6 and a high-dissipation viscoelastic material 7.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and examples.
As shown in figure 2, the tension-compression type grid reinforced viscoelastic damper is symmetrical in structure, and mainly comprises an outer cylinder barrel 1, a piston plate 2, a first guide rod 3-1, a cover plate 4, a first connecting plate 5-1, a second connecting plate 5-2, a topological grid reinforced structure 6, a high-dissipation viscoelastic material 7 and a baffle plate 8.
The outer cylinder barrel 1, the piston plate 2, the guide rod, the cover plate 4 and the connecting plate are all made of common steel, and the piston plate 2 and the guide rod are of an integral structure.
And (3) vulcanizing the topological grid reinforcing structures 6 on the two sides of the piston plate 2 and the high-dissipation viscoelastic material 7 at high temperature and high pressure to form the viscoelastic vibration damping component.
As the optimization of the technical scheme of the invention, the topological mesh reinforced structure is made of Shape Memory Alloy (SMA), and has better deformation recoverability and vibration damping and energy absorption characteristics.
The outer cylinder barrel 1, the viscoelastic vibration reduction component, the piston plate, the guide rod, the cover plate, the baffle plate and the connecting plate form a tension-compression type grid reinforced viscoelastic damper together with the same axle center.
The cover plate 4 is connected with the outer cylinder barrel 1 through bolts, and the second guide rod 3-2 is connected with the first connecting plate 5-1 through welding or bolts. The viscoelastic vibration reduction components on the two sides are bonded with the inner surfaces of the piston plate 2 and the cover plate 4 by adhesives.
As the optimization of the technical scheme of the invention, annular gaps are reserved between the piston plate 2 and the outer cylinder barrel 1 and between the viscoelastic damping component and the guide rod and the outer cylinder barrel 1, when the guide rod and the outer cylinder barrel 1 are axially and relatively dislocated, the viscoelastic damping component on one side is compressed, the viscoelastic damping component on the other side is stretched, and the topological grid reinforcing structure 6 and the viscoelastic material 7 synchronously generate tension-compression deformation to dissipate energy.
The cross section shape, the structure and the size of the tension-compression type grid reinforced viscoelastic damper can be adjusted according to the output force of the damper and the actual application requirement.
The cross section of the damper can be selected from circular, square and the like, and the topological mesh reinforced structure unit cell can be selected from different unit cell frame configurations such as regular polyhedron, annular column, rectangular column, honeycomb and the like.
When the whole size of the damper is larger and the requirement on rigidity is higher, the metal grids are required to be densely arranged, the unit cell size is reduced, and the section size of the frame rod is increased; otherwise, the topological metal grid is required to be sparse, the unit cell size is increased, the unit cell frame rod section size is reduced, the damping performance of the device is improved, and the overall rigidity is reduced.
Example 1
Referring to fig. 1 to 3, the cross section of the tension-compression type grid reinforced viscoelastic damper is circular, the outer diameter of the ring-column-shaped high-dissipation viscoelastic material 7 on two sides of the piston plate is 149mm, the inner diameter of the ring-column-shaped high-dissipation viscoelastic material is 9mm, the axial length of the ring-column-shaped high-dissipation viscoelastic material is 100mm, and the topological grid is reinforcedThe structure is concentric circular ring column frame, frame pole cross-sectional dimension 1mm, adjacent pole apart from 10mm, innermost ring and outermost ring frame diameter are 9mm and 149mm, 2 both sides net axial length of piston plate are 100mm, outer cylinder 1, piston plate 2, apron 4, connecting plate thickness are 8mm, the guide arm size isϕ8mm x 208mm, 0.2 to 2mm of annular clearance between the viscoelastic damping component, the piston plate 2 and the outer cylinder 1, and 0.2 to 2mm of annular clearance between the viscoelastic damping component and the guide rod.
Example 2
As shown in fig. 4 to 6, the cross section of the tension-compression type grid-reinforced viscoelastic damper is square, the length of the square outside the hollow square column-shaped high-dissipation viscoelastic material 7 on the two sides of the piston plate 2 is 59mm, the length of the square inside is 9mm, the axial length is 100mm, the topological grid-reinforced structure unit cell is a square frame, the cross section of the frame rod is 1mm × 1mm, the distance between adjacent rods is 10mm, the lengths of the frame edges of the innermost ring and the outermost ring are 9mm and 59mm, the axial lengths of the grids on the two sides of the piston plate 2 are 100mm respectively, the thicknesses of the outer cylinder barrel 1, the piston plate 2, the cover plate 4, the connecting plate and the baffle plate 8 are 8mm, the size of the guide rod is 8mm × 8mm × 208mm, and the annular gap between the piston plate 2 and the outer cylinder barrel 1 and the annular gap between the viscoelastic damping part and the guide rod are 0.2 to 2mm.
The categories of steel and viscoelastic materials in the device can be selected according to building steel specifications and a high polymer material manual, and the topological mesh reinforced structure can be selected from nickel-titanium alloy, copper-based alloy, iron-based alloy and the like.
The device provided by the invention utilizes the fact that when the guide rod and the outer cylinder barrel are axially and relatively dislocated, the topological grid reinforcing structure and the viscoelastic material synchronously generate tension-compression deformation to dissipate energy. The topological mesh reinforced structure and the viscoelastic material based on the shape memory alloy material both have excellent energy consumption performance.
The topological mesh reinforced structure based on the shape memory alloy material in the device has larger deformation restorability, and the ultimate deformation capacity of the damper is improved. The topological grid reinforcing structure and the damper cavity structure play a role in deformation restraint and protection of the viscoelastic material, and the working performance stability of the damper in the service period is obviously enhanced.
The topological mesh reinforced structure in the device has a wider application temperature range, and can still generate plastic deformation to dissipate energy when the viscoelastic material is softened at a high temperature.
The topological mesh reinforced structure and the high-dissipation viscoelastic material are combined to perform energy dissipation and vibration reduction together. The topological mesh reinforced structure generates elastic deformation under small displacement, and the viscoelastic material is responsible for energy consumption; under large displacement, the topological grid reinforced structure generates elastic-plastic deformation, and the viscoelastic material and the metal grid jointly dissipate energy and vibration. The tension-compression type grid reinforced viscoelastic damper has excellent ultimate deformation and energy consumption capability, a wider application temperature range, and obvious improvement on the safety, reliability and service life of equipment in service period compared with the conventional damper. Therefore, the tension-compression type grid reinforced viscoelastic damper can better play the role of energy dissipation and vibration reduction under various vibration conditions, and can generate greater social and economic benefits.
The embodiments 1 and 2 shown in fig. 1 to 6 are merely examples for better illustrating the present invention, and the specific embodiments of the present invention are not limited thereto. For those skilled in the relevant art and researchers, based on the above description of the invention, it is theoretically possible to make various configurations and forms of changes, such as flower-shaped outer cylinder design, honeycomb-shaped, curved surface-shaped topological metal mesh cell configuration, etc., and the applicant is not exhaustive here. It is intended that all such obvious modifications and variations be included within the scope of the present invention as defined by the appended claims and their equivalents.
Claims (7)
1. A tension-compression type mesh-enhanced viscoelastic damper comprising:
one end of the outer cylinder barrel (1) is connected with the cover plate (4), and the other end of the outer cylinder barrel is connected with the first connecting plate (5-1);
the piston plate (2) is arranged in the inner cavity of the outer cylinder barrel (1) and can move back and forth in the inner cavity of the outer cylinder barrel along the axial direction of the outer cylinder barrel;
a baffle (8) fixedly arranged in the outer cylinder (1) and located between the piston plate (2) and the first connecting plate (5-1); a limiting cavity is formed between the baffle (8) and the first connecting plate (5-1);
the viscoelastic damping components are arranged in a piston cavity of the outer cylinder barrel and comprise two viscoelastic damping components, namely a first viscoelastic damping component positioned between the cover plate (4) and the piston plate (2) and a second viscoelastic damping component positioned between the piston plate (2) and the baffle plate (8);
one end of the first guide rod is connected with the second connecting plate (5-2) on the outer side of the cover plate, and the other end of the first guide rod extends into an inner cavity of the outer cylinder barrel, penetrates through the first viscoelastic vibration damping part and is connected with one side of the piston plate (2);
one end of the second guide rod is connected with the other side of the piston plate (2) and is coaxially arranged with the first guide rod, and the other end of the second guide rod sequentially penetrates through the second viscoelastic damping part and the baffle (8) and then extends into the limiting cavity;
when the guide rod and the outer cylinder barrel are axially and relatively dislocated, the viscoelastic damping component positioned on one side of the piston plate is compressed, and the viscoelastic damping component positioned on the other side of the piston plate is stretched;
the damping component is characterized in that the viscoelastic damping component is formed by a topological grid reinforcing structure (6) and a high-dissipation viscoelastic material (7) through high-temperature and high-pressure vulcanization;
the first viscoelastic vibration damping component and the cover plate (4), the first viscoelastic vibration damping component and the piston plate (2), the second viscoelastic vibration damping component and the piston plate (2) and the second viscoelastic vibration damping component and the baffle plate (8) are tightly bonded through adhesives.
2. The tension-compression type mesh-reinforced viscoelastic damper as claimed in claim 1, wherein the topological mesh-reinforcing structure (6) is steel.
3. The tension-compression mesh-reinforced viscoelastic damper as claimed in claim 1, characterized in that the topological mesh-reinforcing structure (6) is a shape memory alloy material.
4. The tension-compression type grid-reinforced viscoelastic damper as claimed in claim 1, wherein the viscoelastic damping component conforms to the cross-sectional shape and size of the piston plate.
5. The tension-compression type grid-reinforced viscoelastic damper as claimed in claim 1, wherein first annular gaps are formed between the side wall of the viscoelastic damping part and the side wall of the inner cavity of the outer cylinder barrel (1), and between the outer side surface of the piston plate and the side wall of the inner cavity of the outer cylinder barrel (1), and the first annular gaps are 0.2 to 2mm;
the axis of the viscoelastic vibration damping component is provided with a shaft hole for the guide rod to pass through, a second annular gap is formed between the hole wall of the shaft hole and the outer wall of the guide rod, and the second annular gap is 0.2-2mm.
6. The tension-compression type grid-reinforced viscoelastic damper as claimed in claim 1, wherein the cross section of the outer cylinder barrel is circular or square.
7. The tension-compression type mesh-reinforced viscoelastic damper as claimed in claim 1, wherein the topological mesh-reinforcing structure (6) is a regular polyhedron, a ring column, a rectangular column or a honeycomb unit cell frame structure.
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| CN202111281343.6A CN114108859B (en) | 2021-11-01 | 2021-11-01 | Tension-compression type grid reinforced viscoelastic damper |
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| CN202111281343.6A CN114108859B (en) | 2021-11-01 | 2021-11-01 | Tension-compression type grid reinforced viscoelastic damper |
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| CN114108859B true CN114108859B (en) | 2023-04-07 |
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| CN114607720B (en) * | 2022-03-17 | 2024-04-19 | 江苏科技大学 | Particle damper with built-in barrier network |
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| CN101429788B (en) * | 2008-09-26 | 2010-09-15 | 李惠 | Shape memory alloy damper |
| WO2011059471A1 (en) * | 2009-11-16 | 2011-05-19 | Foster-Miller, Inc. | Shock energy absorber |
| CN201827286U (en) * | 2010-10-28 | 2011-05-11 | 广州大学 | Double-piston rod viscous damper with elastic damping |
| CN106641052A (en) * | 2017-01-20 | 2017-05-10 | 苏州国嘉记忆合金有限公司 | Memory alloy damper and preparation method thereof |
| CN108316503B (en) * | 2018-03-08 | 2023-08-04 | 大连理工大学 | Collision vibration damping rod based on piezoelectric energy consumption |
| CN109113408A (en) * | 2018-10-10 | 2019-01-01 | 徐赵东 | It is a kind of with multi-direction anti-pulling, the multidimensional of pretightning force function every vibration absorber and its every oscillation damping method |
| CN110158803B (en) * | 2019-05-08 | 2024-05-07 | 东南大学 | Multidirectional damping and pulling-out resisting device of vibration isolation support and vibration isolation and damping method thereof |
| CN110805636B (en) * | 2019-10-16 | 2021-11-05 | 南京航空航天大学 | Annular piezoelectric stack-based damper |
| CN111075880A (en) * | 2019-12-30 | 2020-04-28 | 浙江大学 | Damper based on paper folding rebounding mechanism |
| CN111441493B (en) * | 2020-04-20 | 2021-06-01 | 南京工业大学 | Viscous-viscoelastic composite damper |
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