CN219175528U - Rate independent passive negative stiffness damping device - Google Patents
Rate independent passive negative stiffness damping device Download PDFInfo
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- CN219175528U CN219175528U CN202223430479.1U CN202223430479U CN219175528U CN 219175528 U CN219175528 U CN 219175528U CN 202223430479 U CN202223430479 U CN 202223430479U CN 219175528 U CN219175528 U CN 219175528U
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- negative stiffness
- damping device
- fixedly connected
- viscous liquid
- bottom plate
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The utility model relates to the technical field of building and bridge vibration reduction and isolation, and discloses a rate-independent passive negative stiffness damping device which comprises a substrate and an upper connecting structure, wherein a viscous liquid damper is arranged on one side of a stop block, a pin shaft is arranged at one end of the viscous liquid damper, series spring assemblies are arranged at the top end and the bottom end of the pin shaft, a pre-compression spring is arranged on the outer side of the middle part of one side surface of a connecting rod, a top plate is arranged on the top end surface of a vertical rod, a support is arranged on the bottom end surface of the top plate, the rate-independent passive negative stiffness damping device has the characteristic that the size of acting force is irrelevant to the excitation frequency, excessive acting force is not generated even under high-frequency excitation, the device and connecting parts thereof are not damaged due to the excessive acting force of the device under the high-frequency excitation, and the structure is prevented from generating excessive high-order modal response under the high-frequency excitation, so that the response acceleration of the structure is effectively controlled.
Description
Technical Field
The utility model relates to the technical field of building and bridge vibration reduction and isolation, in particular to a passive negative stiffness damping device with irrelevant rate.
Background
The self-vibration period of the large flexible engineering structure is longer, in order to improve the anti-vibration performance of the large flexible engineering structure by adopting a conventional vibration isolation technology, the horizontal rigidity of a vibration isolation layer is reduced to an extremely low level by adopting a method for reducing the size or the number of the vibration isolation supports, so that the vibration isolation period reaches more than twice the self-vibration period of the structure, however, the vibration isolation support is limited by the mechanical property, the geometric size and the like of rubber materials of the vibration isolation supports, the qualified vibration isolation supports with extremely low horizontal rigidity are difficult to produce in practical engineering, and the rubber vibration isolation supports with extremely low horizontal rigidity are also difficult to work normally under the vertical load transferred by an upper structure.
Currently, the existing chinese patent with publication number CN201730212U discloses a damping vibration-absorbing device placed in a reinforced concrete member, which includes a damping reinforcing bar, a connecting rod, an anchoring component and a sleeve, and the device increases the damping level of the reinforced concrete member by generating larger plastic strain energy consumption, provides damping vibration-absorbing protection for the reinforced concrete member, and improves the damping of the member only by placing the damping reinforcing bar in the reinforced concrete member, but under the action of extreme earthquakes, the conventional negative-stiffness vibration-isolating system may generate excessive deformation, resulting in reduced practicability, therefore, the equivalent damping of the vibration-isolating system needs to be improved by adding the damping vibration-absorbing device.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a rate-independent passive negative stiffness damping device.
In order to solve the technical problems, the utility model provides the following technical scheme:
the utility model relates to a rate-independent passive negative stiffness damping device, which comprises a substrate and an upper connecting structure, wherein the top surface of the substrate is provided with a bottom plate, two ends of the top surface of the bottom plate are respectively provided with a vertical rod, one side of the vertical rod is provided with a stop block, one side of the stop block is provided with a viscous liquid damper, one end of the viscous liquid damper is provided with a pin shaft, the inner side of the surface of one side of the pin shaft is provided with a pin, the top end and the bottom end of the pin shaft are respectively provided with a series spring assembly, the top surface of the bottom plate is provided with a rod piece, the middle part of the surface of one side of the rod piece is provided with a connecting rod, the outer side of the middle part of the surface of one side of the connecting rod is provided with a pre-compression spring, the top surface of the top end of the vertical rod is provided with a top plate, the top surface of the top plate is provided with an upper connecting structure, and the bottom surface of the top plate is provided with a bracket.
As a preferable technical scheme of the utility model, the substrate is fixedly connected with the bottom plate, the bottom plate is fixedly connected with the vertical rod, and the bottom plate is fixedly connected with the top plate through the vertical rod.
As a preferable technical scheme of the utility model, the stop block is fixedly connected with the bottom plate and the viscous liquid damper, the stop block is made of rigid materials, and the viscous liquid damper provides additional damping for the structure.
As a preferable technical scheme of the utility model, the viscous liquid damper and the pin shaft are assembled in a splicing way, the pin shaft and the pin are assembled in a splicing way, and the pin shaft and the series spring component are assembled in a splicing way, and the series spring component is connected with the whole pin shaft of the viscous liquid damper to form Maxwell type viscoelastic damping.
As a preferable technical scheme of the utility model, the bottom plate and the rod piece are fixedly connected, and the rod piece is made of rigid materials and is arranged in a trapezoid shape.
As a preferable technical scheme of the utility model, the rod piece and the connecting rod are assembled in a splicing way, the connecting rod is vertically arranged, the connecting rod is fixedly connected with the pre-compression spring, and the pre-compression spring is vertically arranged.
As a preferable technical scheme of the utility model, the vertical rods are fixedly connected with the top plate, the top plate and the upper connecting structure are spliced and assembled, the top plate and the support are fixedly connected, and the support is made of rigid materials and is arranged in a trapezoid shape.
Compared with the prior art, the utility model has the following beneficial effects:
the passing rate independent passive negative stiffness damping device has the characteristic that the size of acting force is irrelevant to the excitation frequency, and does not generate excessive acting force even under high-frequency excitation, the device and connecting parts thereof are not damaged due to the excessive acting force of the device under high-frequency excitation, and the structure is prevented from generating excessive high-order modal response under high-frequency excitation, so that the response acceleration of the structure is controlled more effectively.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a schematic plan view of the overall structure of the present utility model;
FIG. 2 is a schematic A-structure of the present utility model;
in the figure: 1. a substrate; 2. an upper connection structure; 3. a bottom plate; 4. a vertical rod; 5. a stop block; 6. a viscous liquid damper; 7. a pin shaft; 8. a pin; 9. a series spring assembly; 10. a rod piece; 11. a connecting rod; 12. pre-pressing a spring; 13. a top plate; 14. and (3) a bracket.
Detailed Description
The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.
Wherein like reference numerals refer to like elements throughout.
Example 1
As shown in fig. 1-2, the utility model provides a passive negative stiffness damping vibration damper with irrelevant rate, which comprises a substrate 1 and an upper connecting structure 2, wherein the top surface of the substrate 1 is provided with a bottom plate 3, two ends of the top surface of the bottom plate 3 are respectively provided with a vertical rod 4, one side of the vertical rod 4 is provided with a stop 5, one side of the stop 5 is provided with a viscous liquid damper 6, one end of the viscous liquid damper 6 is provided with a pin shaft 7, the inner side of one side surface of the pin shaft 7 is provided with a pin 8, the top and bottom ends of the pin shaft 7 are respectively provided with a series spring component 9, the top surface of the bottom plate 3 is provided with a rod 10, the middle part of one side surface of the rod 10 is provided with a connecting rod 11, the middle part of one side surface of the connecting rod 11 is provided with a pre-compression spring 12, the top surface of the vertical rod 4 is provided with a top plate 13, the top surface of the top plate 13 is provided with the upper connecting structure 2, and the bottom surface of the top plate 13 is provided with a bracket 14.
Further, the base 1 is fixedly connected with the bottom plate 3, the bottom plate 3 is fixedly connected with the vertical rods 4, and the bottom plate 3 is fixedly connected with the top plate 13 through the vertical rods 4.
The stop block 5 is fixedly connected with the bottom plate 3 and the viscous liquid damper 6, the stop block 5 is made of rigid materials, and the viscous liquid damper 6 provides additional damping for the structure.
The viscous liquid damper 6 and the pin shaft 7 are assembled in a splicing way, the pin shaft 7 and the pin 8 are assembled in a splicing way, the pin shaft 7 and the series spring assembly 9 are assembled in a splicing way, and the series spring assembly 9 is connected with the whole pin shaft 7 of the viscous liquid damper 6 to form Maxwell type viscoelastic damping.
The bottom plate 3 and the rod piece 10 are fixedly connected, and the rod piece 10 is made of rigid materials and is arranged in a trapezoid shape.
The rod piece 10 and the connecting rod 11 are assembled in a splicing way, the connecting rod 11 is arranged vertically, the connecting rod 11 and the pre-compression spring 12 are fixedly connected, and the pre-compression spring 12 is arranged vertically.
The vertical rods 4 and the top plate 13 are fixedly connected, the top plate 13 and the upper connecting structure 2 are assembled in a splicing way, the top plate 13 and the support 14 are fixedly connected, and the support 14 is made of rigid materials and is arranged in a trapezoid shape.
Specifically, the structure is formed by a bottom plate 3, a vertical rod 4, a stop block 5, a viscous liquid damper 6, a pin shaft 7, a pin 8, a series spring assembly 9, a rod 10, a connecting rod 11, a pre-compression spring 12, a top plate 13 and a support 14, wherein the whole structure is formed by the bottom plate 3 and the top plate 13, the bottom and the top of the device are connected and supported by the device, the structure is formed by the vertical rod 4, the stop block 5, the rod 10, the connecting rod 11 and the support 14, the supporting structure is formed among the components of the device, the series spring assembly 9 and the viscous liquid damper 6 are connected through the pin shaft 7, so that Maxwell type viscoelastic damping is formed, and the negative stiffness is provided by the pre-compression spring 12.
When a user uses the device, when the upper connecting structure 2 moves horizontally relative to the base 1, the bracket 14 drives the pre-compression spring 12 and the series spring component 9 to move laterally in the horizontal direction, and when the pre-compression spring 12 moves laterally in the horizontal direction, the spring pressure forces the component force with the parameters consistent with the direction of the side movement, so as to generate a negative stiffness effect, and the negative stiffness k is assumed N For the series spring assembly 9 and viscous liquid damper 6, the series connection of the two can be represented by a Maxwell cell, and the series spring rate is set to k M The damping coefficient of the viscous liquid damper 6 is c M As a mechanical model of the viscoelastic damping device 6, the force and deformation transfer function of the Maxwell cell can be expressed as follows:
the Maxwell unit and the negative stiffness unit are connected in parallel, so that a mechanical model of the rate-independent passive negative stiffness damping device can be obtained, and the acting force and deformation transfer function of the model can be expressed as follows:
setting k M＝ -2k N The formula can be simplified as follows:
the modulus and absolute value of the transfer function can be obtained from the equation:
the mode length of the transfer function is irrelevant to the excitation frequency, namely, the fact that the acting force of the rate-irrelevant passive negative stiffness damping vibration absorbing device is irrelevant to the excitation frequency under simple harmonic excitation is shown, and even under high-frequency excitation, the rate-irrelevant passive negative stiffness damping vibration absorbing device cannot generate excessive acting force, so that the damage of the device and connecting parts thereof can be avoided, and meanwhile, the structure can be prevented from generating excessive response acceleration.
In summary, the passing rate-independent passive negative stiffness damping device has the characteristic that the size of the acting force is irrelevant to the excitation frequency, and does not generate excessive acting force even under high-frequency excitation, the device and the connecting parts thereof are not damaged due to the excessive acting force of the device under high-frequency excitation, and the structure is prevented from generating excessive high-order modal response under high-frequency excitation, so that the response acceleration of the structure is more effectively controlled.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. The utility model provides a rate is irrelevant passive negative stiffness damping device, includes basement (1) and upper portion connection structure (2), its characterized in that, basement (1) top surface is provided with bottom plate (3), bottom plate (3) top surface both ends all are provided with montant (4), montant (4) one side is provided with dog (5), dog (5) one side is provided with viscous liquid damper (6), viscous liquid damper (6) one end is provided with round pin axle (7), round pin axle (7) one side surface inboard is provided with pin (8), round pin axle (7) top and bottom all are provided with series spring subassembly (9), bottom plate (3) top surface is provided with member (10), member (10) one side surface middle part is provided with connecting rod (11), connecting rod (11) one side surface middle part outside is provided with pre-compaction spring (12), montant (4) top surface is provided with roof (13), roof (13) top surface is provided with upper portion connection structure (2), roof (13) bottom surface is provided with support (14).
2. The passive negative stiffness damping device of claim 1, wherein the base (1) and the bottom plate (3) are fixedly connected, the bottom plate (3) and the vertical rods (4) are fixedly connected, and the bottom plate (3) and the top plate (13) are fixedly connected through the vertical rods (4).
3. The rate-independent passive negative stiffness damping device according to claim 1, wherein the stop block (5) is fixedly connected with the bottom plate (3) and the viscous liquid damper (6), the stop block (5) is made of rigid materials, and the viscous liquid damper (6) provides additional damping to the structure.
4. The rate-independent passive negative stiffness damping device according to claim 1, wherein the viscous liquid damper (6) and the pin (7) are assembled in a spliced manner, the pin (7) and the pin (8) are assembled in a spliced manner, the pin (7) and the series spring assembly (9) are assembled in a spliced manner, and the pin (7) is connected with the viscous liquid damper (6) integrally through the series spring assembly (9) to form Maxwell type viscoelastic damping.
5. The passive negative stiffness damping device of claim 1, wherein the base plate (3) and the rod (10) are fixedly connected, and the rod (10) is made of rigid material and is arranged in a trapezoid shape.
6. The passive negative stiffness damping device of claim 1, wherein the rod (10) and the connecting rod (11) are assembled in a spliced mode, the connecting rod (11) is arranged vertically, the connecting rod (11) and the pre-compression spring (12) are fixedly connected, and the pre-compression spring (12) is arranged vertically.
7. The passive negative stiffness damping device of claim 1, wherein the vertical rod (4) and the top plate (13) are fixedly connected, the top plate (13) and the upper connecting structure (2) are assembled in a spliced mode, the top plate (13) and the bracket (14) are fixedly connected, and the bracket (14) is made of rigid materials and is arranged in a trapezoid mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223430479.1U CN219175528U (en) | 2022-12-21 | 2022-12-21 | Rate independent passive negative stiffness damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223430479.1U CN219175528U (en) | 2022-12-21 | 2022-12-21 | Rate independent passive negative stiffness damping device |
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| Publication Number | Publication Date |
|---|---|
| CN219175528U true CN219175528U (en) | 2023-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223430479.1U Active CN219175528U (en) | 2022-12-21 | 2022-12-21 | Rate independent passive negative stiffness damping device |
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| CN (1) | CN219175528U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116905688A (en) * | 2023-09-08 | 2023-10-20 | 北京工业大学 | Multimode frequency independent additional shock isolation system for existing shock isolation structure |
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2022
- 2022-12-21 CN CN202223430479.1U patent/CN219175528U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116905688A (en) * | 2023-09-08 | 2023-10-20 | 北京工业大学 | Multimode frequency independent additional shock isolation system for existing shock isolation structure |
| CN116905688B (en) * | 2023-09-08 | 2023-12-01 | 北京工业大学 | Multimode frequency independent additional shock isolation system for existing shock isolation structure |
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