CN210916979U - TMD device for realizing frequency self-tuning through shear thickening damping fluid - Google Patents
TMD device for realizing frequency self-tuning through shear thickening damping fluid Download PDFInfo
- Publication number
- CN210916979U CN210916979U CN201921455152.5U CN201921455152U CN210916979U CN 210916979 U CN210916979 U CN 210916979U CN 201921455152 U CN201921455152 U CN 201921455152U CN 210916979 U CN210916979 U CN 210916979U
- Authority
- CN
- China
- Prior art keywords
- shear thickening
- tuning
- damping fluid
- frequency self
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Vibration Prevention Devices (AREA)
Abstract
The utility model discloses a TMD device through shear thickening damping fluid realization frequency is from harmonious, the telescopic tapping sleeve comprises a sleeve, be equipped with ball and sealed cabin in the sleeve, ball includes quality piece and lead screw, the outside at the lead screw is connected in the quality piece transmission, the lower extreme fixedly connected with screw of lead screw, the screw rotates to be connected in the sealed cabin, telescopic lower extreme fixedly connected with light board, the lower fixed surface of light board is connected with the rubber pad, the utility model discloses a harmonious quality attenuator's frequency is from harmonious characteristic, can effectively promote the damping effect of attenuator, reduces the vibration of bridge cable.
Description
Technical Field
The utility model relates to a attenuator equipment technical field specifically is a TMD device that realizes frequency self-tuning through shear thickening damping fluid.
Background
In the existing civil engineering energy-absorbing vibration-damping device, a Tuned Mass Damper (TMD) is more and more widely applied in actual engineering due to the advantages of simple structure, low manufacturing cost, easy maintenance, no need of external energy support and the like, and good vibration-damping effect is also verified by a large amount of engineering. However, the conventional tuned mass damper has a vibration damping effect only in a specific frequency range, and the vibration damping effect is not good when the frequency range deviates from the specific frequency range.
Tuned Mass Dampers (TMD) were originally used for damping vibrations in single degree of freedom high rise structures with good results. This is mainly because the vibration characteristics of this type of structure are mainly the first order mode, so when people use TMD to damp vibration, only the natural frequency of TMD needs to be adjusted to the first order frequency (natural frequency) of the structure. However, in the case of cable structures (stay cables, submarine cables, transmission lines, etc.), the bending stiffness of the structure is small, and this type of structure is easily excited to high-order modes when subjected to external loads. When the natural frequency of the TMD is adjusted to a specific frequency (e.g., first order) of the structure, the damping effect of the TMD is not ideal. Therefore, for this type of structure, if a better control effect is to be achieved using TMD, tuning of the TMD natural frequency should be achieved.
The natural frequency of a TMD is determined by its own stiffness, mass combination. Conventional TMDs employ constant rate springs and constant mass, so their natural frequency cannot be changed. The scholars adopt the variable stiffness spring to adjust the natural frequency of the TMD, but the variable stiffness spring adopted by the scholars can only be changed in an initial adjustment mode, so that the change range of the natural frequency of the TMD is not large, and the operation is inconvenient.
With the progress of the control method, students increasingly adopt an active tuning mode to change the natural frequency of the TMD so as to expand the vibration reduction response range of the TMD. However, these active tuning methods usually use smart materials, require external energy input, increase economic cost, and also increase difficulty in the later maintenance of the damper.
In the field of civil engineering, a bridge generally refers to a structure erected on rivers, lakes and seas to enable vehicles, pedestrians and the like to smoothly pass through, and in order to adapt to the modern high-speed developed traffic industry, the bridge is also extended to be a building which is erected to span mountain stream, unfavorable geology or meet other traffic requirements to enable the traffic to be more convenient, and a bridge pulling rope is generally arranged above the bridge in order to provide the pulling force effect of the bridge.
However, since the conventional bridge wire in the civil engineering field is generally not provided with a Tuned Mass Damper (TMD), the bridge wire in the civil engineering field is inconvenient because it generates large vibration during vehicle running or the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a TMD device through shear thickening damping fluid realization frequency self-tuning to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a TMD device through shear thickening damping fluid realization frequency is from harmonious, includes the sleeve, be equipped with ball and sealed cabin in the sleeve, ball includes quality piece and lead screw, the outside at the lead screw is connected in the quality piece transmission, the lower extreme fixedly connected with screw of lead screw, the screw rotates to be connected in sealed cabin, telescopic lower extreme fixedly connected with light board, the lower fixed surface of light board is connected with the rubber pad.
As a further aspect of the present invention: the upper surface of the sleeve is an arc-shaped surface.
As a further aspect of the present invention: the upper end and the lower end of the mass block are respectively fixedly connected with the sleeve and the sealed cabin through springs.
As a further aspect of the present invention: and a connecting rod is fixedly connected between the screw rod and the propeller.
As a further aspect of the present invention: the sealed cabin is provided with a circular hole, the outer side wall of the connecting rod is fixedly connected with a sealing ring, and the sealing ring is rotatably connected in the circular hole.
As a further aspect of the present invention: the sealed cabin is filled with shear thickening liquid.
As a further aspect of the present invention: the light plate is made of foam or rubber.
As a further aspect of the present invention: the lower surface of the light plate is an arc-shaped surface, and the rubber pad is matched with the lower surface of the light plate.
Compared with the prior art, the beneficial effects of the utility model are that: the light plate is fixedly connected at the lower end of the sleeve, and the rubber pad is fixedly connected with the lower surface of the light plate, so that the device is conveniently and fixedly connected to the stay cord of the bridge; by arranging the propeller and the shear thickening fluid in the sealed cabin, when the propeller moves in the shear thickening fluid, the propeller is limited to move in the shear thickening fluid due to the action of damping force and friction force of the shear thickening fluid; the friction force of the shear thickening fluid is changed along with the different rotating speeds of the propellers, so that the rigidity of the propellers is directly influenced; the change of the rigidity causes the change of the damping frequency, thereby realizing the self-adaptation of the damper frequency along with the change of the impact speed; through reasonable design, the base frequency of the damper can be close to the external impact frequency, so that the maximum vibration reduction effect is exerted. The attachment type self-tuning mass damper based on the shear thickening fluid realizes the frequency self-tuning characteristic of the tuning mass damper, can effectively improve the vibration reduction effect of the damper and reduce the vibration of a bridge inhaul cable.
Drawings
FIG. 1 is a schematic diagram of a TMD apparatus for achieving frequency self-tuning by shear thickening damping fluid;
in the figure: 1-sleeve, 2-mass block, 3-lead screw, 4-sealed cabin, 5-propeller, 6-light plate, 7-rubber pad, 8-spring, 9-connecting rod and 10-shear thickening liquid.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, a TMD device for realizing frequency self-tuning through shear thickening damping fluid includes a sleeve 1, a ball screw and a capsule 4 are disposed in the sleeve 1, the ball screw includes a mass block 2 and a screw 3, the mass block 2 is connected to the outside of the screw 3 in a transmission manner, a screw 5 is fixedly connected to the lower end of the screw 3, the screw 5 is rotatably connected to the capsule 4, a light plate 6 is fixedly connected to the lower end of the sleeve 1, and a rubber pad 7 is fixedly connected to the lower surface of the light plate 6.
The upper surface of the sleeve 1 is an arc surface.
The upper end and the lower end of the mass block 2 are respectively fixedly connected with the sleeve 1 and the sealed cabin 4 through springs 8, so that the mass block 2 can be conveniently reset.
Fixedly connected with connecting rod 9 between lead screw 3 and the screw 5, connecting rod 9's setting is convenient for be connected between lead screw 3 and the screw 5.
The round hole has been seted up on the sealed cabin 4, and the lateral wall fixedly connected with sealing washer of connecting rod 9, sealing washer rotate to be connected in the round hole, and the sealing washer has realized the sealed effect between 4 round holes of sealed cabin connecting rod 9 and sealed cabin.
The sealed cabin 4 is filled with shear thickening liquid 10.
The light plate 6 is made of foam or rubber.
The lower surface of the light plate 6 is an arc surface, and the rubber pad 7 is matched with the lower surface of the light plate 6.
When the utility model is used, the rubber pad 7 is fixedly connected on the bridge pull rope, when the bridge pull rope vibrates, the vibration is transmitted to the sealed cabin 4 through the rubber pad 7 and the light plate 6, thereby causing vibrations of the capsule 4, which vibrations of the capsule 4 cause a reciprocating movement of the mass 2 along the screw 3, this reciprocating movement will cause rotation of the propeller 5 within the shear thickening fluid 10 via conduction through the screw 3, due to the structural shape of the blades of the propeller 5, an upward thrust is generated during the rotation of the propeller 5, meanwhile, the shear thickening fluid 10 has the effects of damping force and friction force on the propeller 5, so that the movement of the propeller 5 is inhibited, and further, the screw rod 3 is restrained from rotating, so that the linear motion of the mass block 2 is restrained, namely, an equivalent spring for restraining the linear motion of the mass block 2 is added, so that the vibration is reduced. This "equivalent spring" together with the spring 8 provides an "equivalent stiffness" for the damper system.
When the impact speed of an object is increased (or the frequency is increased), the vibration amplitude (frequency) of the object is increased, linear relative displacement can occur between the mass block and the screw rod due to inertia, the relative displacement is converted into rotation of the propeller 5 in the shear thickening fluid 10, the shear thickening fluid 10 is cut to generate damping force, according to the characteristics of the shear thickening fluid 10, the cutting speed is higher, the damping force is larger, the rigidity of the equivalent spring is larger, the equivalent rigidity of the whole structure of the damper is larger, and the natural frequency of the damper is larger. That is, when the external excitation frequency increases, the natural frequency of the damper also increases, and the two change trends are consistent. Therefore, the excitation frequency can be tuned to the natural frequency of the damper in a reasonable design mode.
Meanwhile, the shear thickening fluid 10 shows very strong hardening characteristics during high-speed shearing, and the energy consumption capability of the shear thickening fluid is far higher than that of a common viscous damping material. Therefore, the damper can be made lighter and smaller by reducing the axial stroke of the mass. The energy consumption capability and the frequency tuning performance of the damper can be changed by adjusting the diameter and the roughness of the propeller, the size of the gap between the propeller 5 and the sealed cabin 4 and the like.
Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.
Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (8)
1. A TMD device for realizing frequency self-tuning by shearing and thickening damping fluid is characterized in that: including sleeve (1), be equipped with ball and sealed cabin (4) in sleeve (1), ball includes quality piece (2) and lead screw (3), the outside at lead screw (3) is connected in quality piece (2) transmission, the lower extreme fixedly connected with screw (5) of lead screw (3), screw (5) are rotated and are connected in sealed cabin (4), the lower extreme fixedly connected with light board (6) of sleeve (1), the lower fixed surface of light board (6) is connected with rubber pad (7).
2. TMD device for frequency self-tuning by shear thickening damping fluid according to claim 1, characterized in that the upper surface of the sleeve (1) is an arc shaped surface.
3. TMD device for frequency self tuning by shear thickening damping fluid according to claim 1, characterized in that the mass (2) is fixedly connected at its upper and lower ends to the sleeve (1) and the capsule (4) by means of springs (8), respectively.
4. TMD device for frequency self tuning by shear thickening damping fluid according to claim 1, characterized in that a connecting rod (9) is fixedly connected between the screw (3) and the propeller (5).
5. The TMD device for realizing frequency self-tuning by shear thickening damping fluid according to claim 4, wherein the sealed cabin (4) is provided with a circular hole, and the outer side wall of the connecting rod (9) is fixedly connected with a sealing ring which is rotatably connected in the circular hole.
6. TMD device for frequency self tuning by shear thickening damping fluid according to claim 1, characterized in that the capsule (4) is filled with shear thickening fluid (10).
7. TMD device for frequency self-tuning by shear thickening damping fluid according to claim 1, characterized in that the lightweight plate (6) is foam or rubber.
8. TMD device for frequency self-tuning by shear thickening damping fluid according to claim 1, characterized in that the lower surface of the light plate (6) is arc shaped and the rubber pad (7) fits the lower surface of the light plate (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921455152.5U CN210916979U (en) | 2019-09-03 | 2019-09-03 | TMD device for realizing frequency self-tuning through shear thickening damping fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921455152.5U CN210916979U (en) | 2019-09-03 | 2019-09-03 | TMD device for realizing frequency self-tuning through shear thickening damping fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210916979U true CN210916979U (en) | 2020-07-03 |
Family
ID=71361964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921455152.5U Expired - Fee Related CN210916979U (en) | 2019-09-03 | 2019-09-03 | TMD device for realizing frequency self-tuning through shear thickening damping fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210916979U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485267A (en) * | 2019-09-03 | 2019-11-22 | 哈尔滨工业大学（深圳） | A kind of adhesion type self-tuning mass damper and its application method based on shear thickening liquid |
| CN113585358A (en) * | 2021-08-18 | 2021-11-02 | 南京工业大学 | Bidirectional adjusting support suitable for piled raft foundation and adjusting method thereof |
| CN115709295A (en) * | 2022-12-08 | 2023-02-24 | 哈尔滨理工大学 | Self-adaptive vibration-damping boring bar filled with shear thickening fluid |
-
2019
- 2019-09-03 CN CN201921455152.5U patent/CN210916979U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485267A (en) * | 2019-09-03 | 2019-11-22 | 哈尔滨工业大学（深圳） | A kind of adhesion type self-tuning mass damper and its application method based on shear thickening liquid |
| CN113585358A (en) * | 2021-08-18 | 2021-11-02 | 南京工业大学 | Bidirectional adjusting support suitable for piled raft foundation and adjusting method thereof |
| CN115709295A (en) * | 2022-12-08 | 2023-02-24 | 哈尔滨理工大学 | Self-adaptive vibration-damping boring bar filled with shear thickening fluid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210916979U (en) | TMD device for realizing frequency self-tuning through shear thickening damping fluid | |
| CN102535674B (en) | Tempering damper system used for improving wind resistance stability of transmission tower based on single pendulum model | |
| EP1820922A1 (en) | Tuned liquid damper | |
| CN1327084C (en) | Stayed cable shock attenuation device | |
| CN102409775B (en) | Vibration absorption control device for tuned mass damper | |
| CN109654162B (en) | Active composite damping-variable rotation control device | |
| CN110685212B (en) | External granule damping device of suspension cable | |
| CN106988592B (en) | A kind of swing-type tuned mass damper device | |
| CN103938751A (en) | Self-powered semi-active tuned mass damper | |
| CN204325923U (en) | A kind of rotary permanent-magnet dc generator vibration absorbing device for staying cables of bridge flexibly connected | |
| CN103835389B (en) | Inertia rotating mass antivibrator | |
| CN111130040B (en) | Composite spacing ring-nutation damper for controlling integral galloping of lead | |
| CN111155672B (en) | Self-adaptive tuned mass damper based on shear thickening liquid | |
| CN105650194A (en) | Blade type energy-consuming and tuning vibration damper | |
| CN110485267A (en) | A kind of adhesion type self-tuning mass damper and its application method based on shear thickening liquid | |
| CN209483859U (en) | Land wind-driven generator tower damping rope | |
| CN106368343B (en) | A kind of sag damping rope | |
| CN108660905B (en) | Damping vibration damper for medium and long suspension cables of suspension bridge | |
| CN108660904B (en) | Long sling damping vibration damper of suspension bridge | |
| CN204538619U (en) | A kind of multi-functional collision type stockbridge damper | |
| CN104132091B (en) | A kind of shearing bitubular magneto-rheological vibration damper | |
| CN212335746U (en) | Self-resetting SMA-viscous vibration reduction damper | |
| CN110500375B (en) | TLMD vibration reduction system | |
| CN213871035U (en) | Anti-shake speed reducer box | |
| CN218294382U (en) | Speed reducer with stable transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200703 Termination date: 20210903 |