CN214656293U

CN214656293U - Novel collision type damper suitable for high gentle structure damping

Info

Publication number: CN214656293U
Application number: CN202120277727.XU
Authority: CN
Inventors: 黄国庆; 陆成文; 龙涛; 王奇
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-11-09
Anticipated expiration: 2031-02-01

Abstract

The utility model discloses a novel collision type attenuator suitable for high gentle structure damping, including shell and slidable mounting in the inside quality piece of shell, the shell includes base and curb plate, open at the quality piece middle part has the slide opening, the equidistance is provided with the slide bar in the shell, the quality piece passes through slide opening slidable mounting on the slide bar, the equidistance is provided with first viscoelastic material block respectively on two sides of quality piece, the equidistance is provided with second viscoelastic material block respectively on the curb plate of both sides, be provided with the otic placode respectively on two other sides of quality piece, the otic placode overlaps respectively through the trepanning and establishes on the guide arm, first pressure spring and second pressure spring are established to the otic placode cover respectively. The utility model discloses possess two kinds of damping modes, can be along with the different automatic switch-over of excitation level, guarantee the structure and can both obtain better control under arbitrary excitation level to reach the purpose of thoroughly eliminating the main structure vibration, possess simultaneously that the damping is efficient and simple structure, simple to operate, design characteristics such as more pleasing to the eye.

Description

Novel collision type damper suitable for high gentle structure damping

Technical Field

The utility model relates to a novel collision type attenuator suitable for high gentle structure damping.

Background

With the continuous development of industrial technology, the use of novel materials and the improvement of structural design theory, high-flexibility structures such as high-rise buildings, television towers, large-span bridges, wind driven generators and the like are built around the world in the 20 th century. Over the last few decades, the height of these structures has increased gradually, from the first tens of meters, to now hundreds of meters, and even to today's halifa towers, to heights of several kilometers.

With the continuous increase of the height of the structure, one of the main loads borne by the structure is wind load, and the structure is extremely sensitive to the wind load. The higher the height of the structure, the softer the structure, the more severe the influence of wind load, and the more significant wind-induced vibration problem will be brought along therewith. The wind vibration of the high-flexibility structure is restrained, and the influence of wind load on the fatigue of the structure and the like can be reduced to a great extent.

Vibration control of a structure typically proceeds from two perspectives: firstly, the pneumatic performance of the structure is improved. And secondly, the vibration damping of the structure is increased. Namely two corresponding structural vibration control measures, a pneumatic measure and a mechanical measure.

The pneumatic measure is generally from two angles of adding an air force device and selecting a proper structural section shape, so that the wind field around the structure is improved, the wind resistance stability is improved, and the wind-induced vibration is inhibited. This method is simple and easy to implement, but is not aesthetically pleasing and has low wind vibration suppression efficiency.

Mechanical measures are a widely used solution. The mass and the damping of the main body structure are increased by adding the auxiliary structure, and the wind vibration response is reduced. Mechanical control measures are mainly divided into two main categories: passive control and active control. The passive control does not need additional external energy, the control force of the passive control is from the inertia force of the control device when the structure vibrates, and the control force does not need feedback information and is passively generated by the control device. In the using process, the parameters are modulated to be proper and are directly connected with the main structure. The most widely used passive controls are currently the frequency modulated mass dampers (TMD) and the frequency modulated liquid dampers (TLD). The active control measures need to apply external energy, and the magnitude of the external load is monitored and fed back by a computer so as to provide optimal control force to achieve the aim of vibration reduction. The control force generated by the damping device is adjustable, so that the damping effect of the damping device can be optimized by adjusting the control force. But the cost is expensive, the maintenance cost is high, the technology is complex, and the factors such as economy and the like are considered, so that the method has certain limitation in practical engineering application. Commonly used in passive control are TMD, TLD, crash tuned damper (PTMD). The passive control has the advantages of low manufacturing cost, low maintenance cost and easy installation, but has certain disadvantages. Conventional TMD has certain limitations: the vibration damper is very sensitive to frequency, and has obvious wind resistance effect and high vibration damping efficiency only when the frequency is close to the frequency of the controlled vibration mode of the structure; the mass block of the TMD is generally heavier, which is not beneficial to the lightweight design of the structure and can increase the power reaction of the structure; it is bulky and not easy to install. The theoretical research mechanism and system of TLD is not perfect at present, and is bulky, and is not structurally beneficial to installation. The traditional PTMD can not completely eliminate the vibration of the main structure, residual vibration exists, and the main structure still has certain micro vibration when the PTMD exits from working.

Disclosure of Invention

To the problem that exists among the background art, the utility model provides a novel collision type attenuator suitable for high gentle structure damping possesses two kinds of damping modes, can be along with the different automatic switch-over of excitation level, guarantees that the structure can both obtain better control under arbitrary excitation level to reach the purpose of thoroughly eliminating the main structure vibration, possess characteristics such as damping is efficient and simple structure, simple to operate, design are more pleasing to the eye.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the novel collision type damper suitable for high-flexibility structure vibration reduction comprises a shell and a mass block slidably mounted in the shell, wherein the shell comprises a base and side plates, slide holes penetrating through two side surfaces are formed in the middle of the mass block at equal intervals, slide rods are arranged between two opposite side plates on the shell at equal intervals corresponding to the slide holes, the mass block is slidably mounted on the slide rods through the slide holes, first viscoelastic material blocks are respectively arranged on the two side surfaces with the slide holes at equal intervals on the mass block, second viscoelastic material blocks are respectively arranged on the side plates at two sides at equal intervals corresponding to the positions of the first viscoelastic material blocks, the first viscoelastic material blocks and the second viscoelastic material blocks are both arranged in a hemispherical shape, ear plates are respectively arranged on the two side surfaces without the slide holes on the mass block, sleeve holes are formed in the ear plates and are respectively sleeved on guide rods, a first pressure spring and a second pressure spring are respectively sleeved on the guide rod bodies at two sides of the ear plates, the initial original lengths of the first pressure spring and the second pressure spring are different, and when the first pressure spring and the second pressure spring are in the original length state, the first viscoelastic material block on one side is in contact with the surface of the second viscoelastic material block on the same side, and no interaction force exists.

Preferably, the slide opening is a square opening, the slide bar is a square bar, and the upper and lower side surfaces of the slide bar are respectively provided with first rotating shafts at equal intervals.

Preferably, sliding grooves are formed in the positions, corresponding to the first rotating shafts, of the left side surface and the right side surface of the sliding rod respectively, and the supports on the two sides of the first rotating shafts are installed on the first sliding grooves in a sliding mode.

Preferably, the two slide bars located at the outermost side are provided with second rotating shafts at equal intervals on the left and right side surfaces respectively.

Preferably, the positions of the upper side surface and the lower side surface of the two slide bars positioned at the outermost side, which correspond to the second rotating shaft, are respectively provided with a second sliding chute, and the brackets at the two sides of the second rotating shaft are slidably arranged on the second sliding chutes.

Preferably, the second rotation shafts are provided in a smaller number than the first rotation shafts.

Preferably, the inner diameter of the trepan boring is larger than the diameter of the guide rod, and the inner wall of the trepan boring is not in contact with the surface of the guide rod.

Preferably, the top of the casing is provided with a top cover which can be opened.

The utility model has the advantages that:

the utility model discloses possess two kinds of damping modes, can be along with the different automatic switch-over of excitation level, guarantee the structure and can both obtain better control under arbitrary excitation level to reach the purpose of thoroughly eliminating the main structure vibration, possess simultaneously that the damping is efficient and simple structure, simple to operate, design characteristics such as more pleasing to the eye.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a perspective view of the present invention.

Fig. 3 is a schematic view of the slide rod, the first rotating shaft and the second rotating shaft according to the present invention.

In the figure: the device comprises a base 1, a side plate 2, a mass block 3, a sliding rod 4, a sliding hole 5, a first viscoelastic material block 6, a second viscoelastic material block 7, an ear plate 8, a guide rod 9, a first pressure spring 10, a second pressure spring 11, a top cover 12, a sleeve hole 13, a first rotating shaft 14, a first sliding groove 15, a second rotating shaft 16 and a second sliding groove 17.

Detailed Description

In order to make the technical solution and the advantages of the present invention clearer, the present invention uses the bridge tower as an example, and the following description will be made in detail with reference to the accompanying drawings for explaining the preferred embodiment of the present invention to facilitate the understanding of the technical staff.

As shown in fig. 1 to 3, the novel impact damper suitable for high-flexibility structure vibration damping comprises a housing and a mass block 3 slidably mounted in the housing, wherein the mass block 3 is a solid mass block, the housing comprises a base 1 and side plates 2, slide holes 5 penetrating through two side surfaces are equidistantly formed in the middle of the mass block 3, slide rods 4 are equidistantly arranged between two opposite side plates 2 on the housing corresponding to the slide holes 5, the mass block 3 is slidably mounted on the slide rods 4 through the slide holes 5, first viscoelastic material blocks 6 are equidistantly arranged on two side surfaces of the mass block 3 on which the slide holes 5 are formed, second viscoelastic material blocks 7 are equidistantly arranged on the side plates 2 on two sides corresponding to the first viscoelastic material blocks 6, the first viscoelastic material blocks 6 and the second viscoelastic material blocks 7 are hemispherical, and ear plates 8 are respectively arranged on two side surfaces of the mass block 3 on which the slide holes 5 are not formed, the ear plate 8 is provided with sleeve holes 13, the sleeve holes 13 are respectively sleeved on the guide rods 9, and the rod bodies of the guide rods 9 on two sides of the ear plate 8 are respectively sleeved with a first pressure spring 10 and a second pressure spring 11. The initial original lengths of the first compression spring 10 and the second compression spring 11 are different, and when the first compression spring 10 and the second compression spring 11 are in an original length state, the first viscoelastic material block 6 on one side is in contact with the surface of the second viscoelastic material block 7 on the same side, and no mutual acting force exists. The utility model discloses a working process: the utility model discloses install in the bridge tower top, base 1 and curb plate 2 all concreties the installation with the bridge tower structure, realize the impact of biography transmitter gage block and bridge tower. In the rest state, the first viscoelastic material block 6 on one side of the mass block 3 of the present invention is just in surface contact with the second viscoelastic material block 7 on the same side and has no interaction force. When the vibration intensity of the bridge tower is not high, the relative displacement between the mass block 3 and the shell is small, at the moment, the first viscoelastic material block 6 on only one side of the mass block 3 collides with the second viscoelastic material block 7 on the same side of the mass block, and the whole process shows single-side collision energy consumption, so that the vibration energy of the bridge tower can be consumed as much as possible until the vibration energy of the bridge tower is exhausted, and no vibration residue exists. When the vibration intensity of the bridge tower is high, the relative displacement between the mass block 3 and the shell is large and exceeds the initial distance, the first viscoelastic material blocks 6 on the two sides of the mass block 3 alternately collide with the second viscoelastic material blocks 7 on the two sides, and the energy consumption is represented by double-sided collision energy consumption, so that the vibration energy can be consumed as fast as possible, the vibration under the action of initial excitation is consumed rapidly, the time of the bridge tower in a large deformation state is shortened, and the overall safety and the service life of the structure are improved. The two vibration reduction modes are automatically switched along with different excitation levels, so that the bridge tower can be well controlled under any excitation level.

Preferably, the sliding hole 5 is a square hole, the sliding rod 4 is a square rod, and the upper and lower side surfaces of the sliding rod 4 are respectively provided with the first rotating shafts 14 at equal intervals. The upper side surface and the lower side surface of the sliding rod 4 and the sliding hole 5 can be converted into rolling friction, and the friction force between the two is greatly reduced. And, two side surfaces of the two slide bars 4 at the outermost side are respectively provided with a second rotating shaft 16 at equal intervals. The two slide bars 4 at the outermost side and the left and right side surfaces of the slide hole 5 can be converted into rolling friction, and the friction force between the two slide bars and the slide hole is greatly reduced. Meanwhile, under the positioning of the second rotating shafts 16 on the two slide bars 4 positioned at the outermost sides, the left and right sides of the slide bar 4 at the middle part are not contacted with the left and right side walls of the slide hole 5. The loss of the friction force to the inertia force of the mass block 3 is reduced as much as possible, and the vibration reduction efficiency is improved.

Preferably, sliding grooves 15 are respectively formed in the left and right side surfaces of the sliding rod 4 corresponding to the positions of the first rotating shaft 14, and the brackets on both sides of the first rotating shaft 14 are slidably mounted on the first sliding grooves 15. And, the positions of the two slide bars 4 at the outermost side corresponding to the second rotating shaft 16 are respectively provided with a second sliding chute 17, and the brackets at the two sides of the second rotating shaft 16 are slidably mounted on the second sliding chutes 17. The first rotating shaft 14 and the second rotating shaft 16 have certain movement space during work, the stability of the sliding guide process of the sliding rod is guaranteed, and the situation that the rigid structure is easy to break to cause blocking is reduced.

Preferably, the second rotating shafts 16 are provided in a smaller number than the first rotating shafts 14. The number of the first rotating shafts 14 is larger, and the first rotating shafts are used for dispersing and bearing the gravity of the mass block 3 and transmitting the gravity to the supporting rods. The number of the first rotating shafts 14 is small, so that rolling friction is realized, and the contact area between the second rotating shaft 16 and the side wall of the slide hole 5 is reduced as much as possible, thereby reducing friction. Meanwhile, the inner diameter of the sleeve hole 13 is larger than the diameter of the guide rod 9, the inner wall of the sleeve hole 13 is not contacted with the surface of the guide rod 9, and interference on sliding motion of the mass block 3 is reduced to the maximum extent. Maximally reducing the loss of the inertia force of the mass block 3

Preferably, the top of the housing is provided with a top cover 12 that can be opened. And the maintenance, inspection and installation are convenient.

The utility model discloses still possess characteristics such as simple structure, simple to operate, design are more pleasing to the eye.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a novel collision type attenuator suitable for high gentle structure damping which characterized in that: the mass block comprises a shell and a mass block (3) which is arranged in the shell in a sliding manner, the shell comprises a base (1) and side plates (2), sliding holes (5) penetrating through two side surfaces are formed in the middle of the mass block (3) at equal intervals, sliding rods (4) are arranged between two opposite side plates (2) at two positions on the shell at equal intervals corresponding to the sliding holes (5), the mass block (3) is arranged on the sliding rods (4) in a sliding manner through the sliding holes (5), first viscoelastic material blocks (6) are respectively arranged on two side surfaces of the mass block (3) at the sliding holes (5) at equal intervals, second viscoelastic material blocks (7) are respectively arranged on the side plates (2) at two sides corresponding to the first viscoelastic material blocks (6) at equal intervals, the first viscoelastic material blocks (6) and the second viscoelastic material blocks (7) are both arranged in a hemispherical shape, and lug plates (8) are respectively arranged on two side surfaces of the mass block (3) which are not provided with the sliding holes (5), the ear plate (8) is provided with a sleeve hole (13), the sleeve hole (13) is respectively sleeved on the guide rods (9), the guide rods (9) on two sides of the ear plate (8) are respectively sleeved with a first pressure spring (10) and a second pressure spring (11), the initial original lengths of the first pressure spring (10) and the second pressure spring (11) are different, and when the first pressure spring (10) and the second pressure spring (11) are in the original length state, the surface of the first viscoelastic material block (6) on one side is in contact with the surface of the second viscoelastic material block (7) on the same side and no interaction force exists.

2. The new crash damper adapted for highly compliant structural damping according to claim 1 wherein: the sliding hole (5) is a square hole, the sliding rod (4) is a square rod, and the upper side surface and the lower side surface of the sliding rod (4) are respectively provided with a first rotating shaft (14) at equal intervals.

3. The new crash damper adapted for highly compliant structural damping according to claim 1 wherein: sliding grooves (15) are respectively formed in the positions, corresponding to the first rotating shafts (14), of the left side surface and the right side surface of the sliding rod (4), and brackets on the two sides of the first rotating shafts (14) are slidably mounted on the first sliding grooves (15).

4. The new crash damper adapted for highly compliant structural damping according to claim 1 wherein: the left side and the right side of the two slide bars (4) positioned at the outermost side are respectively provided with a second rotating shaft (16) at equal intervals.

5. The new crash damper adapted for highly compliant structural damping according to claim 4 wherein: and the positions of the upper and lower side surfaces of the two slide bars (4) positioned at the outermost side, which correspond to the second rotating shaft (16), are respectively provided with a second sliding chute (17), and the brackets at the two sides of the second rotating shaft (16) are slidably arranged on the second sliding chutes (17).

6. The new crash damper adapted for highly compliant structural damping according to claim 5 wherein: the number of the second rotating shafts (16) is smaller than that of the first rotating shafts (14).

7. The new crash damper adapted for highly compliant structural damping according to claim 1 wherein: the inner diameter of the sleeve hole (13) is larger than the diameter of the guide rod (9), and the inner wall of the sleeve hole (13) is not contacted with the surface of the guide rod (9).

8. The new crash damper adapted for highly compliant structural damping according to claim 1 wherein: the top of the shell is provided with a top cover (12) which can be opened.