Tuned mass damper

Abstract

The utility model relates to the technical field of vibration reduction, in particular to a tuned mass damper which comprises an elastic piece, a first mass block, a steel strand and a second mass block. Wherein one end of the elastic part is connected with the part to be damped; the first mass block is arranged at the other end of the elastic piece, and the connecting point of the elastic piece and the first mass block is located in the middle of the first mass block. One end of the steel strand is connected with the first mass block; the second mass block is arranged at the other end of the steel strand, and the mass of the second mass block is smaller than that of the first mass block. According to the scheme, the problems that in the prior art, a special damping energy dissipation device needs to be arranged on a traditional TMD, the requirement for design parameters of a damper is very strict, and the design difficulty of the TMD is increased can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of vibration reduction, and in particular to a tuned mass damper. Background Art

[0002] With the diversification of engineering structure functions, the development and use of structural calculation methods and lightweight high-strength materials, the vibration problem of tall and long-span structures has attracted more and more attention from the engineering and academic circles, which has led to the rapid development of vibration control technology. Tuned mass dampers are one of the main forms of vibration control. In recent years, the theoretical research on tuned vibration reduction technology has become more mature and its application has become more extensive. Since TD can effectively attenuate the dynamic response of the structure, and has a simple structure, easy installation, convenient maintenance, and economical and practical, it has been widely used as a wind-resistant device for high-rise buildings, tall structures and long-span bridges.

[0003] In related technologies, the tuned mass damper is actually a dynamic vibration absorber, which amplifies the vibration of the main structure and transmits it to the TMD mass block through the resonance principle, and dissipates this part of the vibration energy through its own damping device to achieve rapid attenuation of the vibration of the main structure. The traditional tuned mass damper (TMD-Tuned Mass Damper) is usually composed of a mass block, a spring, and a damping device, as shown in the figure below. At present, TMD has been successfully used to control the vibration of engineering structures, such as wind vibration, earthquake and other forms of vibration.

[0004] However, traditional TMDs require special damping energy dissipation devices, such as viscous dampers, magnetorheological dampers, friction dampers, and eddy current dampers. In order to achieve a better vibration reduction effect, the design parameters of the damper are very strict, which increases the difficulty of TMD design. Summary of the invention

[0005] In view of the defects existing in the prior art, the purpose of this application is to provide a tuned mass damper, which can solve the problem that the traditional TMD in the prior art needs to be equipped with a special damping energy dissipation device, resulting in very strict requirements on the design parameters of the damper, which increases the difficulty of TMD design.

[0006] In order to achieve the above objectives, the technical solution adopted by this application is:

[0007] In one aspect, the utility model provides a tuned mass damper, comprising:

[0008] An elastic member, one end of which is connected to the vibration-damped member;

[0009] A first mass block, which is disposed at the other end of the elastic member, and a connection point between the elastic member and the first mass block is located at a middle position of the first mass block;

[0010] A steel strand, one end of which is connected to the first mass block;

[0011] A second mass block is arranged at the other end of the steel strand, and the mass of the second mass block is less than the mass of the first mass block.

[0012] In some optional schemes, the elastic member is an elastic column, and the elastic column and the steel strand are respectively located on two sides of the first mass block and are coaxially arranged.

[0013] In some optional schemes, the second mass block and the first mass block are both cylindrical.

[0014] In some optional schemes, the elastic column is a cylindrical steel column.

[0015] In some optional schemes, the elastic member is a hollow steel column, in which a cylindrical cavity is provided, and the steel strand and the second mass block are both arranged in the cylindrical cavity.

[0016] In some optional schemes, the second mass block and the cylindrical cavity are both cylindrical, and the diameter of the second mass block is smaller than the diameter of the cylindrical cavity.

[0017] In some optional schemes, the elastic member is an elastic plate, and two steel strands are provided, which are respectively arranged on both sides of the elastic plate, and one end is connected to the first mass block, and the other end is provided with a second mass block.

[0018] In some optional schemes, the first mass block is a square mass block, and the elastic plate is arranged on the symmetry line of one side of the square mass block and is perpendicular to the cover surface.

[0019] In some optional schemes, the first mass block is a cylindrical mass block.

[0020] In some optional schemes, a connection groove is provided at the connection between the first mass block and the steel strand, and the steel strand extends into the connection groove and is connected by zinc-aluminum alloy.

[0021] The beneficial effects brought about by the technical solution provided in the embodiment of the present application include: by connecting the steel strand to the first mass block and arranging the second mass block at the end to provide damping for the first mass block, there is no need to add a special damping device to provide damping for the tuned mass damper TMD (large TMD), and the tuned mass damper TMD (small TMD) composed of the steel strand and the second mass block can provide a larger damping ratio for the large TMD. In addition, the present solution adopts the method of small TMD to provide damping for large TMD, and the design and structure are simple, and the design parameters are easy to adjust and design. The design of the micro-vibration of the damped part is more reasonable. If the amplitude of the micro-vibration of the damped part amplified and transmitted to the TMD is small, the damper stroke specially designed for the TMD is affected by the damper gap, and it is difficult to achieve the optimal vibration reduction effect. However, through the secondary amplification effect of the small TMD, the vibration reduction effect can be better exerted. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 Schematic diagram of the structure of the first tuned mass damper in the embodiment of the present application;

[0024] Figure 2 Schematic diagram of the structure of a second tuned mass damper in an embodiment of the present application;

[0025] Figure 3 Schematic diagram of the structure of the second tuned mass damper in the embodiment of the present application.

[0026] In the figure: 1. elastic member; 2. vibration-damped member; 3. first mass block; 4. steel strand; 5. second mass block. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0029] like Figure 1-Figure 3As shown, the present invention provides a tuned mass damper, comprising: an elastic member 1, a first mass block 3, a steel strand 4 and a second mass block 5. Among them, one end of the elastic member 1 is connected to the damped member 2; the first mass block 3 is arranged at the other end of the elastic member 1, and the connection point between the elastic member 1 and the first mass block 3 is located in the middle position of the first mass block 3; one end of the steel strand 4 is connected to the first mass block 3; the second mass block 5 is arranged at the other end of the steel strand 4, and the mass of the second mass block 5 is less than the mass of the first mass block 3.

[0030] When the tuned mass damper is used, by connecting the steel strand 4 with the first mass block 3 and setting the second mass block 5 at the end to provide damping for the first mass block 3, there is no need to add a special damping device to provide damping for the tuned mass damper TMD, that is, the large TMD. The tuned mass damper TMD composed of the steel strand 4 and the second mass block 5, that is, the small TMD mass can provide a larger damping ratio for the large TMD. In addition, the present scheme adopts the method of small TMD to provide damping for large TMD, which is simple in design and construction, and the design parameters are easy to adjust and design. The design of the micro-vibration of the damped component 2 is more reasonable. If the amplitude of the micro-vibration of the damped component 2 amplified and transmitted to the TMD is small, the damper stroke specially designed for the TMD is affected by the damper gap, and it is difficult to achieve the optimal vibration reduction effect. However, through the secondary amplification effect of the small TMD, the vibration reduction effect can be better exerted.

[0031] In addition, the connection point between the elastic member 1 and the first mass block 3 is designed to be located in the middle of the first mass block 3, which can make the entire device more balanced and stable. If the first mass block 3 is a cube or a cuboid, when the elastic member 1 is a columnar member, the elastic member 1 is connected to the middle of one side of the cube or the cuboid and is perpendicular to the side. When the elastic member 1 is a plate-shaped member, the elastic member 1 is connected to the axial symmetry line of one side of the cube or the cuboid; if the first mass block 3 is a cylinder, the elastic member 1 is coaxially arranged with the cylinder. When the elastic member 1 is a plate-shaped member, the elastic member 1 is parallel to the axis of the cylinder and is located on the radial line of the cylinder, and the center line is in the same direction as the axis of the cylinder.

[0032] In some optional embodiments, the elastic member 1 is an elastic column, and the elastic column and the steel strand 4 are respectively located on two sides of the first mass block 3 and are coaxially arranged.

[0033] In this embodiment, by connecting the steel strand 4 to the first mass block 3 and arranging the second mass block 5 at the end, the elastic column and the steel strand 4 are respectively located on both sides of the first mass block 3 and are coaxially arranged to provide damping for the first mass block 3, so as to better maintain the stability of the entire device. When the vibration-damping member 2 vibrates, the vibration is better transmitted to the steel strand 4 after passing through the elastic member 1 and the first mass block 3, so that the small TMD damper composed of the second mass block 5 and the steel strand 4 can provide damping for the large TMD.

[0034] In other embodiments, the steel strand 4 and the elastic member 1 may be arranged on the same side of the first mass block 3 as long as the balance and symmetry of the structure can be ensured. For example, two steel strands 4 are symmetrically arranged on both sides of the elastic member 1, and each steel strand 4 is equipped with a second mass block 5.

[0035] In some optional embodiments, the second mass block 5 and the first mass block 3 are both cylindrical.

[0036] In this embodiment, the second mass block 5 and the first mass block 3 are designed to be cylindrical, and the elastic member 1 and the steel strand 4 are in the same direction as the axis of the second mass block 5 and the first mass block 3, which can reduce the impact of ambient wind on the second mass block 5 and the first mass block 3 in the direction perpendicular to their axis.

[0037] In some optional embodiments, the elastic column is a cylindrical steel column.

[0038] In this example, the elastic column is designed as a cylindrical steel column. Such a design can reduce vibration in all directions perpendicular to its axial direction, and is relatively balanced, with the same effect in all directions.

[0039] In some optional embodiments, the elastic member 1 is a hollow steel column, in which a cylindrical cavity is provided, and the steel strand 4 and the second mass block 5 are both provided in the cylindrical cavity.

[0040] In this embodiment, the elastic member 1 is designed as a hollow steel column, a cylindrical cavity is set in the hollow steel column, and the steel strand 4 and the second mass block 5 are set in the cylindrical cavity, which can save the installation space of the entire device. In this example, there is a gap between the second mass block 5 and the inner wall of the cylindrical cavity, and the gap is greater than the amplitude of the second mass block 5.

[0041] In some optional embodiments, the second mass block 5 and the cylindrical cavity are both cylindrical, and the diameter of the second mass block 5 is smaller than the diameter of the cylindrical cavity.

[0042] In this embodiment, the hollow steel column is cylindrical, and the second mass block 5 and the cylindrical cavity are both cylindrical, so that the second mass block 5 and the steel strand 4 can be better installed in the cylindrical cavity. The second mass block 5 and the steel strand 4 are coaxially arranged with the cylindrical cavity, and the diameter of the second mass block 5 is smaller than the diameter of the cylindrical cavity, so as to avoid the second mass block 5 from colliding with the inner wall of the cylindrical cavity when shaking.

[0043] In some optional embodiments, the elastic member 1 is an elastic plate, and two steel strands 4 are provided, respectively disposed on both sides of the elastic plate, with one end connected to the first mass block 3 and the other end provided with a second mass block 5.

[0044] In this embodiment, the elastic member 1 is an elastic plate, which can provide a vibration reduction effect in the vertical direction of the elastic plate. In order to improve the balance of the vibration reduction effect, a steel strand 4 is provided on both sides of the elastic plate, and a second mass block 5 is configured. The steel strand 4 is spaced apart from the elastic member 1 to prevent the second mass block 5 from colliding with the elastic member 1 when vibrating.

[0045] In some optional embodiments, the first mass block 3 is a square mass block, and the elastic plate is arranged on the symmetry axis of one side of the square mass block and is perpendicular to the side.

[0046] In this embodiment, since the elastic member 1 adopts an elastic plate, it can only provide a vibration reduction effect on the vibration in the vertical direction of the elastic plate. Therefore, the first mass block 3 adopts a square mass block to match it to reduce the manufacturing difficulty.

[0047] In some optional embodiments, the first mass block 3 is a cylindrical mass block.

[0048] In this embodiment, the elastic member 1 is parallel to the axis of the cylinder and is located on the radial line of the cylinder, and the center line is in the same direction as the axis of the cylinder.

[0049] In some optional embodiments, a connection groove is provided at the connection between the first mass block 3 and the steel strand 4, and the steel strand 4 extends into the connection groove and is connected by zinc-aluminum alloy.

[0050] In this example, a connection groove is provided at the connection between the first mass block 3 and the steel strand 4, the first mass block 3 is connected to the steel strand 4, the steel strand 4 is inserted into the connection groove, and the zinc-aluminum alloy is used for casting connection, so that the first mass block 3 and the steel strand 4 can be more tightly connected. In other embodiments, the first mass block 3 and the steel strand 4 can also be connected by bolt connection.

[0051] In summary, by connecting the steel strand 4 to the first mass block 3 and setting the second mass block 5 at the end to provide damping for the first mass block 3, there is no need to add a special damping device to provide damping for the tuned mass damper TMD (large TMD). The tuned mass damper TMD (small TMD) composed of the steel strand 4 and the second mass block 5 can provide a larger damping ratio for the large TMD. In addition, the present solution adopts the method of small TMD to provide damping for large TMD, which is simple in design and construction, and the design parameters are easy to adjust and design. The design of the micro-vibration of the damped component 2 is more reasonable. If the amplitude of the micro-vibration of the damped component 2 amplified and transmitted to the TMD is small, the damper stroke specially designed for the TMD is affected by the damper gap, and it is difficult to achieve the optimal damping effect. However, through the secondary amplification effect of the small TMD, the damping effect can be better exerted.

[0052] The elastic member 1 is designed as a hollow steel column, a cylindrical cavity is set in the hollow steel column, and the steel strand 4 and the second mass block 5 are set in the cylindrical cavity, which can save the installation space of the entire device. In this example, there is a gap between the second mass block 5 and the inner wall of the cylindrical cavity, and the gap is greater than the amplitude of the second mass block 5.

[0053] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0054] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0055] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A tuned mass damper, characterized in that: include: An elastic member (1), one end of which is connected to a vibration-damped member (2); A first mass block (3) is arranged at the other end of the elastic member (1), and the connection point between the elastic member (1) and the first mass block (3) is located at the middle position of the first mass block (3); A steel strand (4), one end of which is connected to the first mass block (3); A second mass block (5) is arranged at the other end of the steel strand (4), and the mass of the second mass block (5) is smaller than the mass of the first mass block (3).

2. A tuned mass damper according to claim 1, characterized in that: The elastic member (1) is an elastic column, and the elastic column and the steel strand (4) are respectively located on two sides of the first mass block (3) and are coaxially arranged.

3. A tuned mass damper according to claim 2, characterized in that: The second mass block (5) and the first mass block (3) are both cylindrical.

4. A tuned mass damper according to claim 2, characterized in that: The elastic column is a cylindrical steel column.

5. A tuned mass damper according to claim 1, characterized in that: The elastic member (1) is a hollow steel column, in which a cylindrical cavity is provided, and the steel strand (4) and the second mass block (5) are both arranged in the cylindrical cavity.

6. A tuned mass damper according to claim 5, characterized in that: The second mass block (5) and the cylindrical cavity are both cylindrical, and the diameter of the second mass block (5) is smaller than the diameter of the cylindrical cavity.

7. A tuned mass damper according to claim 1, characterized in that: The elastic member (1) is an elastic plate, and two steel strands (4) are provided, which are respectively arranged on both sides of the elastic plate, and one end is connected to the first mass block (3), and the other end is provided with a second mass block (5).

8. A tuned mass damper according to claim 7, characterized in that: The first mass block (3) is a square mass block, and the elastic plate is arranged on a symmetry line of one side of the square mass block and is perpendicular to the cover surface.

9. A tuned mass damper according to claim 7, characterized in that: The first mass block (3) is a cylindrical mass block.

10. A tuned mass damper according to claim 1, characterized in that: A connection groove is provided at the connection point between the first mass block (3) and the steel strand (4), and the steel strand (4) extends into the connection groove and is connected by zinc-aluminum alloy.

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