CN110145044A - Negative stiffness damping device - Google Patents
Negative stiffness damping device Download PDFInfo
- Publication number
- CN110145044A CN110145044A CN201910402533.5A CN201910402533A CN110145044A CN 110145044 A CN110145044 A CN 110145044A CN 201910402533 A CN201910402533 A CN 201910402533A CN 110145044 A CN110145044 A CN 110145044A
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- China
- Prior art keywords
- friction
- plate
- connecting plate
- pulling plate
- negative stiffness
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Links
- 238000013016 damping Methods 0.000 title claims abstract description 36
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 34
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 30
- 210000005069 ears Anatomy 0.000 claims description 18
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Abstract
The present invention relates to negative stiffness damping devices, including fixed shell, and fixed shell includes the vertical side end panel of horizontal top plate and both ends, and side end panel is fixed on top plate both ends；Side plate is fixedly connected with outside side end panel, the cabinet that fixed shell and two blocks of side plates surround, flake bearing side pole is equipped with outside cabinet for being fixedly connected, multiple vertical friction tracks are equipped at the center of the inner top of fixed shell, multiple friction tracks are evenly distributed on the center line of top plate, and centerline parallel is in side end panel；The two sides of each friction track are symmetrically provided with a friction component；Friction component one end is slidably connected with friction track, and is also fixedly connected with pedestal mounting flange, and the other end and side end panel of friction component are hinged.The present invention, which has, also can provide very big pressure and installation space is small in the lesser situation of decrement, and stable equilibrium of contributing, the negative stiffness damping device size of production is small, and damping force is big, and negative stiffness feature is obvious.
Description
Technical field
The present invention relates to negative stiffness damping devices, can be applied to the control of engineering structure vibration damping, belong to vibration control skill
Art field.
Background technique
China is the country that an earthquake takes place frequently, and collapsing for building structure is in the disasters such as Tangshan Earthquake, Wenchuan earthquake
The main reason for property loss that causes casualties, with the rapid development of our country's economy, the shockproof requirements of building, also mention therewith
Height, mostly uses anti-buckling support in traditional vibration-proof structure, viscoelastic damper, mild steel damper, frcition damper etc. into
The control of row vibration damping.But these traditional dampers can apply a biggish additional stiffness to structure in some cases, just
The increase of degree can make more seismic energies be transmitted to structure top, lead to the interlaminar shear increase of structure destructurized
Possibility improves, and causes effectiveness in vibration suppression to be unable to reach expection, anti-seismic performance is undesirable.
Summary of the invention
Based in above structure vibration damping biggish additional stiffness this problem can be applied to structure, reduction knot is proposed
The negative stiffness damping device of structure rigidity.The present invention is implementation method are as follows: based on traditional frcition damper, is pressed by changing
The size of power realizes the generation of negative stiffness damping force, the pressure of the negative stiffness damping device nitrogen gas spring hinged by both ends
Apply, both nitrogen gas spring and two end connections served as negative stiffness element, and friction damper embodies quasi- zero stiffness feature, according to rigid
Principle of parallel is spent, negative stiffness characteristic is presented in negative stiffness damping device.It is provided with circular hole among the connector, can be passed through
The reciprocating motion of frcition damper drives negative stiffness element to be rotated.
To achieve the goals above, this invention takes following technical solutions:
Negative stiffness damping device, including fixed shell, the fixation shell include that horizontal top plate and both ends hang down
Straight side end panel, the side end panel are fixed on top plate both ends；Be fixedly connected with side plate outside side end panel, the fixation shell with
The cabinet that two blocks of side plates surround, the cabinet outside are equipped with flake bearing side pole for being fixedly connected, fix the inside of shell
Multiple vertical friction tracks are equipped at the center of top plate, multiple friction tracks are evenly distributed on the center line of top plate, institute
The centerline parallel stated is in side end panel；
The two sides of each friction track are symmetrically provided with a friction component；Described friction component one end and friction
Track is slidably connected, and is also fixedly connected with pedestal mounting flange, and the other end and side end panel of friction component are hinged.
Two friction tracks are preferable provided with, every two friction component shares a friction track, amounts to four friction groups
Part.
Further, each friction component includes the first ears connecting plate, the second ears connecting plate, nitrogen bullet
Spring, monaural connecting plate, sliding pulling plate；The nitrogen gas spring compression end connects monaural connecting plate, monaural connecting plate and second pair
Ear connecting plate is hinged；Second ears connecting plate is fixed on sliding pulling plate；The upper end of sliding pulling plate is slidably connected with friction track,
Sliding pulling plate is slided up and down along friction track；The lower end of each sliding pulling plate connects pulling plate connection by pin shaft
Plate, the pulling plate connecting plate are fixedly connected with pedestal mounting flange；Nitrogen gas spring cylinder body is fixedly connected with the connection of the first ears
Plate, the first ears connecting plate are hinged on side end panel inner wall.
The friction component of nitrogen gas spring composition will be arranged symmetrically by axis of friction track, when preventing from repeatedly moving back and forth
Damper glances off.
The sliding pulling plate is equipped with guiding groove in glide direction.Groove and the friction track for sliding pulling plate setting are left
Right two sides should not it is stuck can be free to slide.
There are gap between the lower end of pair of sliding pulling plate on each friction track, the pulling plate connecting plate is mounted on
In gap, the gap width is greater than pulling plate and connects plate thickness.After sliding pulling plate is mounted on friction track, between sliding pulling plate not
It contacts with each other.Pulling plate connecting plate is put into gap, is connected by pin shaft, and slide assemblies is driven to move back and forth.Two pieces of slidings
Gap between pulling plate will install pulling plate connecting plate enough, and remaining after installing have certain gap.The group being attached by pin shaft
Part needs to be freely rotated by axis of pin shaft.
Further, the maximum of nitrogen gas spring compression is less than 90 the percent of product specification.
When damper is installed in structure, carried out hingedly by the flake of upper end, lower end carries out flange by ring flange
Connection.Its damping force is the vector sum of frictional force and nitrogen gas spring elastic force, and when original state, it is maximum that nitrogen gas spring is in decrement
State simultaneously vertically squeezes sliding pulling plate, after damper enters working stage, can generate between nitrogen gas spring and sliding pulling plate certain
Angle, nitrogen gas spring be parallel to sliding pulling plate component make damper far from equilbrium position always, nitrogen gas spring is perpendicular to cunning
The component of dynamic pulling plate provides the normal pressure for generating frictional force, and damper deviation equilbrium position is bigger, generates the normal pressure of frictional force
It is smaller, so its damping force shows as negative stiffness.
The present invention can pass through the coefficient of friction of change rubbing surface, negative stiffness element duration, nitrogen gas spring parameter, nitrogen gas spring
Quantity adjusts the damping force and negative stiffness size of negative stiffness damping device.Resistance is improved while can be achieved to reduce the rigidity of structure
Buddhist nun, inherently, negative stiffness damping device extend the yielding stage of structure, reduce structural natural frequencies, extend knot
In the structure period, damping ratio is increased, to improve Structural Energy Dissipation ability, there is boundless application prospect.
The negative stiffness damping device has the advantage that
(1) nitrogen gas spring make negative stiffness element, have the lesser situation of decrement under also can provide very big pressure and
Installation space is small, and stable equilibrium of contributing, the negative stiffness damping device size of production is small, and damping force is big, and negative stiffness feature is bright
It is aobvious.
(2) negative stiffness damping device mechanical characteristic can be according to nitrogen gas spring parameter, negative stiffness element duration, friction system
Number, damper stroke, negative stiffness number of elements are adjusted.
Detailed description of the invention
Fig. 1 is structure of the invention structural map；
Fig. 2 is front view of the invention；
Fig. 3 is nitrogen gas spring structural schematic diagram of the present invention；
Fig. 4 is monaural connecting board structure structural map of the present invention；
Fig. 5 is ears connecting board structure structural map of the present invention；
Fig. 6 is the fixed shell structure structural map of the present invention；
Fig. 7 is present invention sliding pulling plate structure structural map；
Fig. 8 is pulling plate connecting board structure structural map of the present invention；
Fig. 9 is the hysteresis loop of damper of the present invention.
Specific embodiment
The present invention will be further described below in conjunction with the embodiments.
As depicted in figs. 1 and 2, negative stiffness damping device, including fixed shell 2, as shown in fig. 6, the fixation
The side end panel 13 vertical including horizontal top plate and both ends of shell 2, the side end panel 13 are fixed on top plate both ends；Side end panel 13
It is fixedly connected with side plate 9, the cabinet that the fixation shell 2 and two blocks of side plates 9 surround outside, the cabinet outside is equipped with flake
Bearing side pole 1 is set there are two vertical friction track 12, two at the center of the inner top of fixed shell 2 for being fixedly connected
A friction track 12 is evenly distributed on the center line of top plate, and the centerline parallel is in side end panel 13；
The two sides of each friction track 12 are symmetrically provided with a friction component；Described friction component one end with rub
It wipes track 12 to be slidably connected, and is also fixedly connected with pedestal mounting flange 8, the other end and side end panel 13 of friction component are cut with scissors
It connects.Every two friction component shares a friction track 12, amounts to four friction components.
Each friction component includes the first ears connecting plate 3, the second ears connecting plate 11, nitrogen gas spring 4, monaural
Connecting plate 5, sliding pulling plate 6；4 compression end of nitrogen gas spring connects monaural connecting plate 5, monaural connecting plate 5 and the second ears
Connecting plate 11 is hinged；Second ears connecting plate 11 is fixed on sliding pulling plate 6；Upper end and the friction track 12 for sliding pulling plate 6 are sliding
Dynamic connection, sliding pulling plate 6 are slided up and down along friction track 12；The lower end of each sliding pulling plate 6 passes through pin shaft 10
Pulling plate connecting plate 7 is connected, the pulling plate connecting plate 7 is fixedly connected with pedestal mounting flange 8.Component diagram such as Fig. 7 and Fig. 8 institute
Show.
As shown in figure 3,4 cylinder body of nitrogen gas spring is fixedly connected with the first ears connecting plate 3, the first ears connecting plate 3 is hinged on
On 13 inner wall of side end panel.
The sliding pulling plate 6 is equipped with guiding groove in glide direction.
There are gap between the lower end of pair of sliding pulling plate 6 on each friction track 12, the pulling plate connecting plate 7 is pacified
In gap, the gap width is greater than 7 thickness of pulling plate connecting plate.
After sliding pulling plate 6 is put into friction track 12, sliding pulling plate 6 is not in contact with each other.
In addition, as shown in Figure 4, Figure 5, when to prevent damper from working, reducing and generating the possibility destroyed to nitrogen gas spring, doing
Countersunk head processing.Counter sink or selection drive friction component to turn compared with the screw of jam nut when preventing damper from moving back and forth
Collide with nut when dynamic and influences damper normal work.
Coefficient of friction between adjustment sliding pulling plate 6 and friction track, replaces the adjustable resistance of nitrogen gas spring 4 of different parameters
The damping force and negative stiffness that Buddhist nun's device generates.Friction component quantity is adjusted, the size of damping force can be adjusted.
The damping force of negative stiffness damping device is the vector sum of frictional force and nitrogen gas spring elastic force, when original state,
Nitrogen gas spring 4 is in decrement maximum rating and vertically squeezes sliding pulling plate 6, after damper enters working stage, nitrogen bullet
Certain angle can be generated between spring 4 and sliding pulling plate 6, the component that nitrogen gas spring 4 is parallel to sliding pulling plate 6 makes damper remote always
From equilbrium position, nitrogen gas spring 4 provides the normal pressure for generating frictional force perpendicular to the component of sliding pulling plate 6, and damper deviates flat
Weighing, position is bigger, and the normal pressure for generating frictional force is smaller, so its damping force shows as negative stiffness.The hysteresis that embodiment generates
Curve is as shown in figure 9, the negative stiffness original part both ends aperture distance used slides rubbing between pulling plate 6 and friction track 12 for 95mm
Wiping coefficient is about 0.1, and nitrogen gas spring mechanics parameter is 1650N, adds up to 4, damper stroke is ± 30mm, with sine wave
0.05HZ load, CYCLIC LOADING 10 times, damper shows as apparent negative stiffness during loading as can be seen from Figure 9, stagnant
It returns curve to stablize, negative stiffness numerical value is about -65N/mm.In addition, damping force also increases therewith when negative stiffness number of elements increases
Add；When coefficient of friction increases, maximum damping force is consequently increased；The negative stiffness generated when 4 pressure increase of nitrogen gas spring will increase
Add.
It is an exemplary embodiments of the invention above, implementation of the invention is without being limited thereto.
Claims (4)
1. negative stiffness damping device, it is characterised in that: including fixed shell (2), the fixation shell (2) includes level
The vertical side end panel (13) of top plate and both ends, the side end panel (13) is fixed on top plate both ends；Side end panel (13) is fixed outside
It is connected with side plate (9), the cabinet that the fixation shell (2) is surrounded with two pieces of side plates (9), is equipped with flake outside the cabinet
Bearing side pole (1) is equipped with multiple vertical friction tracks for being fixedly connected at the center of the inner top of fixed shell (2)
(12), multiple friction tracks (12) are evenly distributed on the center line of top plate, and the centerline parallel is in side end panel (13)；
The two sides of each friction track (12) are symmetrically provided with a friction component；Described friction component one end and friction
Track (12) is slidably connected, and is also fixedly connected with pedestal mounting flange (8), the other end and side end panel of friction component
(13) hinged.
2. negative stiffness damping device according to claim 1, it is characterised in that: each the friction component includes
First ears connecting plate (3), the second ears connecting plate (11), nitrogen gas spring (4), monaural connecting plate (5), sliding pulling plate (6)；Institute
Nitrogen gas spring (4) compression end connection monaural connecting plate (5) stated, monaural connecting plate (5) and the second ears connecting plate (11) are hinged；
Second ears connecting plate (11) is fixed in sliding pulling plate (6)；The upper end and friction track (12) sliding for sliding pulling plate (6) connect
It connects, sliding pulling plate (6) is slided up and down along friction track (12)；The lower end of each sliding pulling plate (6) passes through pin shaft
(10) pulling plate connecting plate (7) are connected, the pulling plate connecting plate (7) is fixedly connected with pedestal mounting flange (8)；
Nitrogen gas spring (4) cylinder body is fixedly connected with the first ears connecting plate (3), and the first ears connecting plate (3) is hinged on side end panel
(13) on inner wall.
3. negative stiffness damping device according to claim 2, it is characterised in that: the sliding pulling plate (6) is in cunning
Dynamic direction is equipped with guiding groove.
4. negative stiffness damping device according to claim 2, it is characterised in that: one on each friction track (12)
To there are gap, the pulling plate connecting plate (7) is mounted in gap, the relief width between the lower end of sliding pulling plate (6)
Degree is greater than pulling plate connecting plate (7) thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910402533.5A CN110145044A (en) | 2019-05-15 | 2019-05-15 | Negative stiffness damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910402533.5A CN110145044A (en) | 2019-05-15 | 2019-05-15 | Negative stiffness damping device |
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| Publication Number | Publication Date |
|---|---|
| CN110145044A true CN110145044A (en) | 2019-08-20 |
Family
ID=67595397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910402533.5A Pending CN110145044A (en) | 2019-05-15 | 2019-05-15 | Negative stiffness damping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110145044A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836543A (en) * | 2017-03-03 | 2017-06-13 | 哈尔滨工业大学 | The adjustable passive negative stiffness damper of series mechanism |
| CN112343393A (en) * | 2020-10-21 | 2021-02-09 | 北京工业大学 | Amplification type negative stiffness friction damping wall |
| CN112411782A (en) * | 2020-10-21 | 2021-02-26 | 北京工业大学 | Balance weight lever type negative stiffness friction damper |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631322A (en) * | 2015-01-29 | 2015-05-20 | 哈尔滨工业大学 | Passive spring-damping negative stiffness damper for inhaul cable vibration mitigation |
| CN105179587A (en) * | 2015-06-30 | 2015-12-23 | 上海交通大学 | Multi-freedom-degree low-frequency large-load all-metal passive vibration isolator |
| CN106836543A (en) * | 2017-03-03 | 2017-06-13 | 哈尔滨工业大学 | The adjustable passive negative stiffness damper of series mechanism |
| CN209907646U (en) * | 2019-05-15 | 2020-01-07 | 北京工业大学 | Negative-stiffness damping device |
-
2019
- 2019-05-15 CN CN201910402533.5A patent/CN110145044A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631322A (en) * | 2015-01-29 | 2015-05-20 | 哈尔滨工业大学 | Passive spring-damping negative stiffness damper for inhaul cable vibration mitigation |
| CN105179587A (en) * | 2015-06-30 | 2015-12-23 | 上海交通大学 | Multi-freedom-degree low-frequency large-load all-metal passive vibration isolator |
| CN106836543A (en) * | 2017-03-03 | 2017-06-13 | 哈尔滨工业大学 | The adjustable passive negative stiffness damper of series mechanism |
| CN209907646U (en) * | 2019-05-15 | 2020-01-07 | 北京工业大学 | Negative-stiffness damping device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836543A (en) * | 2017-03-03 | 2017-06-13 | 哈尔滨工业大学 | The adjustable passive negative stiffness damper of series mechanism |
| CN106836543B (en) * | 2017-03-03 | 2023-03-14 | 哈尔滨工业大学 | Series mechanism adjustable passive negative stiffness damper |
| CN112343393A (en) * | 2020-10-21 | 2021-02-09 | 北京工业大学 | Amplification type negative stiffness friction damping wall |
| CN112411782A (en) * | 2020-10-21 | 2021-02-26 | 北京工业大学 | Balance weight lever type negative stiffness friction damper |
| CN112343393B (en) * | 2020-10-21 | 2021-10-26 | 北京工业大学 | Amplification type negative stiffness friction damping wall |
| CN112411782B (en) * | 2020-10-21 | 2021-10-26 | 北京工业大学 | Balance weight lever type negative stiffness friction damper |
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