CN209780389U - Two-way frequency modulation mass damper - Google Patents
Two-way frequency modulation mass damper Download PDFInfo
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- CN209780389U CN209780389U CN201920265938.4U CN201920265938U CN209780389U CN 209780389 U CN209780389 U CN 209780389U CN 201920265938 U CN201920265938 U CN 201920265938U CN 209780389 U CN209780389 U CN 209780389U
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Abstract
The utility model relates to a bidirectional frequency modulation mass damper, the outermost side of the upper part is provided with two wallboards, the two wallboards are connected through a screw rod, the joint is tightly connected by a nut, a mass block is arranged on the screw rod, and a horizontal spring is connected with the mass block and the two wallboards; a plurality of mass blocks at the lower part are connected into a whole by welding, and the mass blocks are connected with the bottom plate by a small damper and a vertical spring; the small damper is positioned in the mass block hole, the upper part of the small damper is connected with the mass block at the upper end through a bolt, and the lower part of the small damper is connected with the bottom plate through a bolt; the top plate and the bottom plate are connected through bolts by connecting pipes; the spring is arranged between the mass block hole and the bottom plate, and is guided by the connecting pipe to ensure the stability of the spring; the upper part and the lower part are connected by welding between an upper wallboard and a lower roof plate, and a stiffening rib is added between the wallboard and the roof plate. The frequency modulation mass damper is convenient to process, has lower cost, can process horizontal and vertical vibration bidirectional vibration, and is a bidirectional frequency modulation mass damper.
Description
Technical Field
the utility model relates to a bridge and building structure's shock absorber, especially a two-way frequency modulation mass damper.
Background
The frequency-modulated mass damper is one kind of passive vibration damping control system, and consists of main structure and subsidiary structure attached to the main structure, including mass block, spring and damping unit and supported on the structure.
The frequency-modulated mass damper has the working mechanism of 'dynamic braking', namely the motion of one mass block is used for controlling or weakening the motion of the other mass block, the self-vibration frequency of the frequency-modulated mass damper is close to the basic frequency or the excitation frequency of the main structure as much as possible by adjusting the dynamic characteristic, and when the main structure vibrates under the excitation action of an external load, the frequency-modulated mass damper generates an inertia force opposite to the vibration direction of the main structure to act on the main structure, so that the vibration reaction of the main structure is attenuated and controlled.
The common frequency-modulated mass damper can only solve the problem of unidirectional vibration, and cannot solve the problem when the main structure vibrates in a horizontal and vertical manner; a small damper is adopted in a damping unit of a general frequency modulation mass damper, and the small damper is high in processing cost and complex in processing. The bidirectional frequency modulation mass damper can simultaneously play a role in horizontal and vertical vibration of the main structure, and the horizontal part of the bidirectional frequency modulation mass damper is free of damping units and generates damping through friction between the mass block and the guide rod.
therefore, based on the above difficulties, a two-way frequency modulation mass damper needs to be designed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve above-mentioned technical problem, provide a two-way frequency modulation mass damper.
The technical scheme of the utility model is that:
A two-way frequency modulation mass damper is characterized in that two sides of the upper part of the two-way frequency modulation mass damper are provided with two wallboards, the two wallboards are connected through a screw, the joint of the wallboards and the screw is tightly connected through a nut, a first mass block is arranged on the screw, and a horizontal spring is arranged between the first mass block and the wallboards; the lower part of the bidirectional frequency modulation mass damper is provided with a plurality of mass blocks II which are welded with each other, the mass blocks II form a rectangular body, the rectangular body is connected with the bottom plate through a small damper and a vertical spring, and the bottom plate is connected with the top plate through a connecting pipe which penetrates through the rectangular body; the wallboard is connected with the roof, sets up the stiffening rib between wallboard and the roof.
Furthermore, holes are respectively formed in the middle and four corners of the rectangular body, small dampers are arranged in the holes in the middle of the rectangular body, the upper parts of the small dampers are connected with the mass block II at the uppermost end through bolts, and the lower ends of the small dampers penetrate through the holes and are connected with the bottom plate through bolts; springs are arranged in holes at four corners of the rectangular body, the springs are sleeved on the connecting pipes, and the lower ends of the springs are connected with the bottom plate through bolts.
Furthermore, the small damper comprises an upper connecting block, a piston rod, a sealing bush, a sealing box body, a piston and a damping material, the upper connecting block is welded with the piston rod, the piston rod penetrates through the sealing bush to be in threaded connection with the piston, the sealing bush is in sealing and gapless fit with the sealing box body, and the damping material is filled in the sealing box body.
Further, wallboard and roof pass through welded connection, and wallboard, roof pass through welded connection with the stiffening rib respectively.
Furthermore, one end of the horizontal spring is connected with the first mass block, and the other end of the horizontal spring is connected with the wallboard.
Further, the first mass is mounted on the screw, wherein the damping is generated by friction between the first mass and the screw.
Furthermore, two ends of the connecting pipe are respectively connected with the bottom plate and the top plate through bolts.
The utility model has the advantages that: the utility model discloses two-way frequency modulation mass damper can play the effect to the level of main structure and vertical vibration simultaneously, and two-way frequency modulation mass damper horizontal part does not have the damping unit, produces the damping through the friction between quality piece one and guide arm.
Drawings
FIG. 1 is a front view of the two-way frequency-modulated mass damper of the present invention;
FIG. 2 is a structural side view of the dual-direction frequency-modulated mass damper of the present invention;
FIG. 3 is a connection diagram of the two-way FM mass damper of the present invention and a main structure;
Fig. 4 is a structure diagram of a small damper on the dual-way fm mass damper of the present invention.
In the figure: 1. a stiffening rib; 2. a nut; 3. a wallboard; 4. a horizontal spring; 5. a first mass block; 6. a guide bar; 7. a top plate; 8. a second mass block; 9. a vertical spring; 10. a base plate; 11. a small damper; 12. a connecting pipe; 13. an upper connecting block; 14. a piston rod; 15. a seal bushing; 16. sealing the box body; 17. a piston; 18. a damping material.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Example (b): as shown in fig. 1 and 2, a bidirectional frequency modulation mass damper comprises a stiffening rib 1, a nut 2, wall plates 3, a horizontal spring 4, a first mass block 5, a guide rod 6, a top plate 7, a second mass block 8, a vertical spring 9, a bottom plate 10, a small damper 11 and a connecting pipe 12, wherein the outermost side of the upper part of the bidirectional frequency modulation mass damper is provided with the two wall plates 3, the two wall plates 3 are connected through a screw 6, the connecting part is tightly connected through the nut 2, the first mass block 5 is arranged on the screw 6, and the horizontal spring 4 is connected with the first mass block 5 and the two wall plates 3; the lower part of the bidirectional frequency modulation mass damper is provided with a plurality of second mass blocks 8, the plurality of second mass blocks 8 are connected into a whole (a rectangular body) through mutual welding, and the second mass blocks 8 are connected with a bottom plate 10 through small dampers 11 and vertical springs 9; the small damper 11 is positioned in the hole of the second mass block 8, the upper part of the small damper is connected with the second mass block 8 at the upper end through a bolt, and the lower part of the small damper is connected with the bottom plate 10 through a bolt; the top plate 7 and the bottom plate 10 are connected through a connecting pipe 12 by bolts; the spring 9 is arranged between the hole of the second mass block 8 and the bottom plate 10, and is guided by the connecting pipe 12 to ensure the stability of the second mass block; the upper part and the lower part of the two-way frequency modulation mass damper are connected by welding the wallboard 3 at the upper part and the top plate 7 at the lower part, and a stiffening rib 1 is additionally arranged between the wallboard 3 and the top plate 7.
Holes are respectively formed in the middle and four corners of the rectangular body, all the holes are through holes, a small damper 11 is arranged in each hole in the middle of the rectangular body, the upper portion of each small damper 11 is connected with the second mass block 8 at the uppermost end through a bolt, and the lower end of each small damper 11 penetrates through the holes to be connected with the bottom plate 10 through bolts; be equipped with spring 9 in the hole at four angles of cuboid, spring 9 overlaps on connecting pipe 12, and the upper and lower both ends of connecting pipe 12 are passed and are connected with roof 7 and bottom plate 10 respectively behind the hole at four angles of cuboid, and spring 9's lower extreme passes through bolted connection with bottom plate 10.
As shown in fig. 4, the small damper 11 includes an upper connection block 13, a piston rod 14, a sealing bush 15, a sealing box 16, a piston 17 and a damping material 18, the upper connection block 13 and the piston rod 14 are welded, the upper portion of the piston rod 14 passes through the upper end of the hole in the middle of the rectangular body, the lower portion of the piston rod 14 passes through the sealing bush 15 and is in threaded connection with the piston 17, the piston rod 14 and the sealing bush 15 are in sealing connection through a sealing ring, the sealing bush 15 and the sealing box 16 are in sealing and gapless fit, and the inside of the sealing box 16 is filled with the damping.
The utility model discloses a theory of operation:
As shown in fig. 3, when the external main structure is subjected to horizontal and vertical direction load-induced vibration, the dual frequency-modulated mass damper generates an inertial force opposite to the vibration direction of the main structure to act on the main structure, so that the vibration reaction of the main structure is attenuated and controlled.
The utility model discloses a use of attenuator:
After the damper body is installed on the external main body structure, when the external main body structure is subjected to horizontal and vertical load excitation vibration or the main body structure per se generates horizontal and vertical load excitation vibration, the novel damper can generate vibration opposite to the vibration on the main body structure to resist and adjust the vibration, so that the vibration attenuation of the main body structure is stopped or attenuated to a controllable range.
Claims (7)
1. A two-way frequency modulation mass damper is characterized in that: two sides of the upper part of the bidirectional frequency modulation mass damper are provided with two wall plates (3), the two wall plates (3) are connected through a screw (6), the joints of the wall plates (3) and the screw (6) are tightly connected through nuts (2), a first mass block (5) is installed on the screw (6), and a horizontal spring (4) is arranged between the first mass block (5) and the wall plates (3); the lower part of the bidirectional frequency modulation mass damper is provided with a plurality of mass blocks II (8) which are welded with each other, the mass blocks II (8) form a rectangular body, the rectangular body is connected with a bottom plate (10) through a small damper (11) and a vertical spring (9), and the bottom plate (10) is connected with a top plate (7) through a connecting pipe (12) penetrating through the rectangular body; wallboard (3) are connected with roof (7), set up stiffening rib (1) between wallboard (3) and roof (7).
2. A dual frequency tuned mass damper as claimed in claim 1, wherein: holes are respectively formed in the middle and four corners of the rectangular body, small dampers (11) are arranged in the holes in the middle of the rectangular body, the upper parts of the small dampers (11) are connected with the second mass block (8) at the uppermost end through bolts, and the lower ends of the small dampers (11) penetrate through the holes to be connected with the bottom plate (10) through bolts; springs (9) are arranged in holes at four corners of the rectangular body, the springs (9) are sleeved on the connecting pipe (12), and the lower ends of the springs (9) are connected with the bottom plate (10) through bolts.
3. a dual frequency tuned mass damper as claimed in claim 2, wherein: the small damper (11) comprises an upper connecting block (13), a piston rod (14), a sealing bushing (15), a sealing box body (16), a piston (17) and damping materials (18), the upper connecting block (13) and the piston rod (14) are welded, the piston rod (14) penetrates through the sealing bushing (15) to be in threaded connection with the piston (17), the sealing bushing (15) and the sealing box body (16) are in sealing and gapless fit, and the damping materials (18) are filled in the sealing box body (16).
4. A dual frequency tuned mass damper as claimed in claim 1, wherein: wallboard (3) and roof (7) pass through welded connection, and wallboard (3), roof (7) pass through welded connection with stiffening rib (1) respectively.
5. A dual frequency tuned mass damper as claimed in claim 1, wherein: one end of the horizontal spring (4) is connected with the first mass block (5), and the other end of the horizontal spring (4) is connected with the wallboard (3).
6. A dual frequency tuned mass damper as claimed in claim 1, wherein: the first mass block (5) is mounted on the screw (6), wherein the damping is generated by friction between the first mass block (5) and the screw (6).
7. a dual frequency tuned mass damper as claimed in claim 1, wherein: and two ends of the connecting pipe (12) are respectively connected with the bottom plate (10) and the top plate (7) through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920265938.4U CN209780389U (en) | 2019-03-04 | 2019-03-04 | Two-way frequency modulation mass damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920265938.4U CN209780389U (en) | 2019-03-04 | 2019-03-04 | Two-way frequency modulation mass damper |
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| Publication Number | Publication Date |
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| CN209780389U true CN209780389U (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920265938.4U Active CN209780389U (en) | 2019-03-04 | 2019-03-04 | Two-way frequency modulation mass damper |
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| CN (1) | CN209780389U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111519519A (en) * | 2020-06-05 | 2020-08-11 | 湖南科技大学 | Self-anchoring and self-charging type adjustable hydraulic fluid damper |
-
2019
- 2019-03-04 CN CN201920265938.4U patent/CN209780389U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111519519A (en) * | 2020-06-05 | 2020-08-11 | 湖南科技大学 | Self-anchoring and self-charging type adjustable hydraulic fluid damper |
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