CN218969750U

CN218969750U - Self-balancing vertical ultralow frequency tuned mass damper

Info

Publication number: CN218969750U
Application number: CN202223402858.XU
Authority: CN
Inventors: 吴肖波; 王波; 荆国强; 柴小鹏; 汪正兴; 肖龙; 马长飞; 戴青年; 刘鹏飞; 李亚敏; 尹琪; 王鼎鑫; 曹冠军; 董京礼
Original assignee: China Railway Major Bridge Engineering Group Co Ltd MBEC; China Railway Bridge Science Research Institute Ltd
Current assignee: China Railway Major Bridge Engineering Group Co Ltd MBEC; China Railway Bridge Science Research Institute Ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-05-05
Anticipated expiration: 2032-12-19

Abstract

The utility model relates to the field of structural vibration reduction, in particular to a self-balancing vertical ultralow frequency tuned mass damper. This vertical ultra-low frequency tuning mass damper of self-balancing includes: a mass, a spring assembly, and at least one gas balancer. The spring assembly is arranged between the mass block and the structure to be damped, one end of the spring assembly is connected with the structure to be damped, and the other end of the spring assembly is connected with the mass block; the gas balancer comprises a cylinder and a piston rod, the cylinder is connected with the mass block, one end of the piston rod is used for being connected with the structure to be damped, and the other end of the piston rod extends into the cylinder and is in sliding connection with the cylinder. The ultralow frequency tuned mass damper provided by the application provides damping through the gas balancer, and the gas balancer balances the gravity of a part of mass blocks, so that the static deformation and the consumption of the spring under the low frequency condition are obviously reduced, the volume is reduced, and the installation environment of a large-span bridge can be met.

Description

Self-balancing vertical ultralow frequency tuned mass damper

Technical Field

The utility model relates to the field of structural vibration reduction, in particular to a self-balancing vertical ultralow frequency tuned mass damper.

Background

The large-span suspension bridge and the cable-stayed bridge have the advantages of light weight, fine structure, small damping, low self-vibration frequency, easy occurrence of various forms of vibration under the action of external load, and the vibration not only can cause the problems of personnel discomfort, structural shaking, structural fatigue and the like, but also can cause bad social negative effects, such as vortex-induced vibration phenomenon of the parrot Yangtze river bridge and the tiger gate bridge which appear successively in 2020, and the vibration frequency is lower than 0.4Hz, and the vibration belongs to the category of ultra-low frequency vibration.

The Tuned Mass Damper (TMD) mainly comprises three components of a spring, a mass and damping, and has very obvious inhibition effect on structural vibration. However, when the conventional TMD is used for ultra-low frequency vertical vibration reduction, the contradiction between the low rigidity of the spring and the gravity of the balance mass is difficult to be treated. If the weight of the mass block is directly and purely balanced by the elastic force of the spring, the deformation of the spring is as follows:

as the frequency is reduced, the deformation of the springs is increased rapidly, the space occupied by the shock absorber is also increased rapidly, and the calculation shows that the deformation of the springs required by the conventional TMD to reach 0.3Hz, 0.2Hz and 0.1Hz is respectively 2.76m, 6.21m and 24.82m, and for the practical bridge structure, the clearance position of the main girder of the damper is allowed to be within about 2-3 m, and the general tuned mass damper cannot meet the requirement of the installation space. The compression amount of the pressure spring is large, so that the pressure spring is unstable in lateral buckling, difficult to compress, difficult to install and the like.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a self-balancing vertical ultralow-frequency tuned mass damper, which can solve the problems of small application range caused by overlarge spring deformation and overlarge volume under the low-frequency condition by using a conventional damper in the prior art.

In order to achieve the above purpose, the utility model adopts the technical proposal that a method for preparing the composite material is provided

The utility model provides a self-balancing vertical ultralow frequency tuning mass damper, which comprises the following components:

a mass block;

the spring assembly is arranged between the mass block and the structure to be damped, one end of the spring assembly is used for being connected with the structure to be damped, and the other end of the spring assembly is connected with the mass block;

the at least one gas balancer comprises a cylinder and a piston rod, wherein the cylinder is connected with the mass block, one end of the piston rod is used for being connected with the structure to be damped, and the other end of the piston rod extends into the cylinder and is in sliding connection with the cylinder.

In some alternatives, the cylinder has a cylinder length that is greater than a length of the piston rod.

In some alternatives, the spring assembly is a compression spring and the mass is located above the spring assembly.

In some optional schemes, the self-balancing vertical ultralow frequency tuning mass damper further comprises a mounting plate, wherein the spring assembly and the piston rod are used for being connected with one end of the structure to be damped, and the mounting plate is used for being connected with the structure to be damped.

In some alternatives, the spring assembly includes four compression springs spaced below the mass.

In some optional schemes, the positions of the mounting plate and the mass block, which are connected with the pressure spring, are provided with limit grooves, and the end parts of the pressure spring are positioned in the limit grooves.

In some alternative schemes, one end of the pressure spring connected with the mounting plate is provided with a spring base and is positioned in the limit groove.

In some alternatives, a piston rod base is provided at an end of the piston rod connected to the mounting plate, and the piston rod passes through the piston rod base and the mounting plate.

In some alternatives, the mass is rectangular, and a gas balancer is disposed at each of four corners of the rectangle.

In some alternative schemes, the cylinder is connected with the mass block through the mass block connecting seat, a through hole is arranged on the mass block connecting seat, and the mass block connecting seat is sleeved outside the cylinder through the through hole.

Compared with the prior art, the utility model has the advantages that: the piston rod and the cylinder are matched, so that the vibration direction of the mass block can be limited on one hand, on the other hand, the cylinder is filled with gas with certain pressure, the piston rod and the cylinder are matched to balance the gravity of the mass block together with the spring assembly, damping and limiting of the swing of the mass block can be further provided for the mass block, and the spring assembly only bears a small amount of the gravity of the mass block, so that the rigidity of the spring assembly can be reduced, the static compression amount and the consumption of the spring assembly can be reduced, the design of the ultralow-frequency vertical tuning mass damper is possible, the installation height requirement is met, and the manufacturing cost can be saved by reducing the use of the spring assembly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic front view of a self-balancing vertical ultra-low frequency tuned mass damper according to an embodiment of the present utility model.

Fig. 2 is a schematic top view of a self-balancing vertical ultra-low frequency tuned mass damper according to an embodiment of the present utility model.

Fig. 3 is a schematic perspective view of a self-balancing vertical ultra-low frequency tuned mass damper according to an embodiment of the present utility model.

Fig. 4 is a perspective view of a gas balancer provided in an embodiment of the present utility model.

In the figure: 1. a mass block; 2. a gas balancer; 21. a cylinder; 22. a mass block connecting seat; 23. a piston rod; 24. a base; 3. a spring assembly; 31. a pressure spring; 32. a spring base; 4. and (3) mounting a plate.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

An embodiment of a self-balancing vertical ultra-low frequency tuned mass damper according to the present utility model is described in further detail below with reference to the accompanying drawings.

The present utility model, as described in fig. 1-3, provides a self-balancing vertical ultra-low frequency tuned mass damper comprising: a mass 1, a spring assembly 3 and at least one gas balancer 2.

The spring assembly 3 is arranged between the mass block 1 and the structure to be damped, one end of the spring assembly is connected with the structure to be damped, and the other end of the spring assembly is connected with the mass block 1; at least one gas balancer 2, the gas balancer 2 includes a cylinder 21 and a piston rod 23, the cylinder 21 is connected with the mass 1, one end of the piston rod 23 is used for being connected with the structure to be damped, and the other end extends into the cylinder 21 and is connected with the cylinder 21 in a sliding way.

When the self-balancing vertical ultralow frequency tuned mass damper is used, the spring assembly 3 is arranged between the mass block 1 and a structure to be damped, one end of the spring assembly is connected with the structure to be damped, the other end of the spring assembly is connected with the mass block 1, the cylinder 21 is arranged on the mass block 1, one end of the piston rod 23 is connected with the structure to be damped, and the other end of the piston rod extends into the cylinder 21 to be slidably connected with the cylinder 21. The cooperation of piston rod 23 and cylinder 21 on the one hand can restrict the vibration direction of quality piece 1, on the other hand, with filling the gas of certain pressure in the cylinder 21, the cooperation of piston rod 23 and cylinder 21 can balance the gravity of quality piece 1 together with spring assembly 3, still can provide damping and restriction quality piece swing for quality piece 1, spring assembly 3 only bears a small amount of quality piece gravity, consequently can reduce spring assembly 3's rigidity, reduce spring assembly 3 static compression volume and quantity for ultra-low frequency vertical tuning quality damper design becomes possible, satisfy the installation height requirement, through reducing spring assembly 3's the use of being used for, can save the cost.

In the present embodiment, the gas charged in the cylinder 21 is nitrogen gas.

In some alternative embodiments, the cylinder 21 has a length that is greater than the length of the piston rod 23.

In this embodiment, the length of the cylinder body of the cylinder 21 is longer than the length of the piston rod 23, so that damage to the cylinder 21 caused by the piston rod 23 when the cylinder 21 is displaced beyond the limit along with the mass 1 can be avoided.

In some alternative embodiments, the spring assembly 3 is a compression spring and the mass 1 is located above the spring assembly 3.

In the embodiment, the dynamic rigidity of the damper is provided by the pressure spring, and compared with the pressure spring scheme, the independent support bracket of the tension spring can be saved, so that the arrangement is more compact, the installation space is saved, and the stability is better. In the design stroke, the mass block 1 compresses the spring assembly 3, and when being positioned at the bottommost end, the spring assembly 3 can not be pressed and buckled, and when the mass block 1 is positioned at the topmost end, the pressure spring is ensured not to be hollow.

In some alternative embodiments, the self-balancing vertical ultra-low frequency tuned mass damper further comprises a mounting plate 4, the spring assembly 3 and the piston rod 23 are used for being connected with one end of the structure to be damped, each being connected with the mounting plate 4, and the mounting plate 4 is used for being connected with the structure to be damped.

In this embodiment, the spring assembly 3 and the piston rod 23 are both mounted on the mounting plate 4, and when the whole damper is mounted on the structure to be damped, only the mounting plate 4 is required to be connected with the structure to be damped, and such arrangement can facilitate the mounting of the damper and the overall adjustment of the position of the damper.

In some alternative embodiments, the spring assembly 3 comprises four compression springs 31, the four compression springs 31 being spaced below the mass 1.

In some alternative embodiments, the mass 1 is rectangular, and a gas balancer 2 is disposed at each of the four corners of the rectangle.

In this embodiment, four compression springs 31 are disposed at intervals below the mass 1, so that the balance of the mass 1 is more easily maintained. The mass block 1 is a flat plate mass block and is rectangular, the four compression springs 31 are also rectangular, and the rectangular area formed by the four compression springs 31 is smaller than the area of the mass block 1.

In other embodiments, the mass block 1 can also be triangular and circular, and can be suitable for bridge box girders, cylinder structures and the like; the spring assembly 3 provided below is only required to be able to balance the mass 1 with the gas balancer 2.

In addition, the elastic deformation direction of the spring assembly 3 is parallel to the sliding direction of the cylinder 21 relative to the piston rod 23, so that the stability of the vibration of the mass block 1 can be improved. The cooperation of the piston rod 23 with the cylinder 21 limits the vibration direction of the mass 1.

In some alternative embodiments, the positions of the mounting plate 4 and the mass block 1, which are connected with the compression spring 31, are provided with limit grooves, and the end parts of the compression spring 31 are positioned in the limit grooves.

In this embodiment, the mounting plate 4 and the mass block 1 are provided with the limit grooves, so that the compression spring 31 is positioned in the limit grooves, and the stability of the compression spring 31 during operation can be maintained.

In some alternative embodiments, the end of the compression spring 31 connected to the mounting plate 4 is provided with a spring base 32 and is located in the limit groove.

In this embodiment, the end portion of the compression spring 31 is provided with the spring base 32 for being clamped in the limiting groove, which is more beneficial to ensuring the stability of the compression spring 31 and improving the stability of the mass block 1.

In some alternative embodiments, the end of the piston rod 23 connected to the mounting plate 4 is provided with a piston rod mount 24, the piston rod 23 being connected to the mounting plate 4 via the piston rod mount 24.

In this embodiment, the piston rod base 24 is provided at the end of the piston rod 23 connected to the mounting plate 4, so that the piston rod 23 can be conveniently connected to the mounting plate 4.

As shown in fig. 3 and 4, in some alternative embodiments, the cylinder 21 is connected to the mass 1 through a mass connecting seat 22, a through hole is formed in the mass connecting seat 22, and the mass connecting seat 22 is sleeved outside the cylinder 21 through the through hole.

In this embodiment, the mass 1 is a flat plate mass, and is rectangular, and a gas balancer 2 is disposed at each of four corners of the mass 1. The cylinder 21 is connected with the mass block 1 through the mass block connecting seat 22, and the mass block connecting seat 22 is detachably connected with the mass block 1, so that the installation and the replacement of the cylinder 21 can be facilitated.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

It should be noted that in this application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-balancing vertical ultra-low frequency tuned mass damper, comprising:

a mass (1);

the spring assembly (3) is arranged between the mass block (1) and the structure to be damped, one end of the spring assembly is used for being connected with the structure to be damped, and the other end of the spring assembly is connected with the mass block (1);

at least one gas balancer (2), gas balancer (2) include cylinder (21) and piston rod (23), cylinder (21) with quality piece (1) are connected, piston rod (23) one end be used for with wait damping structure to be connected, the other end stretches into in cylinder (21), with cylinder (21) sliding connection.

2. A self-balancing vertical ultra low frequency tuned mass damper according to claim 1, wherein the cylinder body length of the cylinder (21) is greater than the length of the piston rod (23).

3. A self-balancing vertical ultra low frequency tuned mass damper according to claim 1, wherein the spring assembly (3) is a compression spring, and the mass (1) is located above the spring assembly (3).

4. A self-balancing vertical ultra-low frequency tuned mass damper according to claim 1, further comprising a mounting plate (4), wherein the spring assembly (3) and the piston rod (23) are arranged at one end of the structure to be damped, both being connected to the mounting plate (4), and wherein the mounting plate (4) is arranged to be connected to the structure to be damped.

5. A self-balancing vertical ultra low frequency tuned mass damper according to claim 4, wherein the spring assembly (3) comprises four compression springs (31), the four compression springs (31) being arranged at intervals below the mass (1).

6. The self-balancing vertical ultralow frequency tuning mass damper according to claim 5, wherein limiting grooves are formed in positions, connected with the compression springs (31), of the mounting plate (4) and the mass blocks (1), and the end portions of the compression springs (31) are located in the limiting grooves.

7. The self-balancing vertical ultralow frequency tuning mass damper according to claim 6, wherein one end of the pressure spring (31) connected with the mounting plate (4) is provided with a spring base (32) and is positioned in the limit groove.

8. A self-balancing vertical ultra low frequency tuned mass damper according to claim 4, wherein the end of the piston rod (23) connected to the mounting plate (4) is provided with a piston rod base (24), the piston rod (23) being connected to the mounting plate (4) via the piston rod base (24).

9. The self-balancing vertical ultralow frequency tuning mass damper according to claim 1, wherein the mass block (1) is rectangular, and each of four corners of the rectangle is provided with a gas balancer (2).

10. The self-balancing vertical ultralow frequency tuning mass damper according to claim 9, wherein the air cylinder (21) is connected with the mass block (1) through a mass block connecting seat (22), a through hole is formed in the mass block connecting seat (22), and the mass block connecting seat (22) is sleeved outside the air cylinder (21) through the through hole.