A tuned mass damper provided with a constrained layer damping

Abstract

The application discloses a tuned mass damper provided with constraint layer damping, which comprises a fixed part, an elastic connecting part and a mass part, wherein the mass part is connected with the fixed part through the elastic connecting part; the elastic connecting part is a thin-walled structure; at least one side of the elastic connecting part is paved with constraint layer damping; the constraint layer damping comprises more than one damping layer and more than one constraint layer, and the more than one damping layer and the more than one constraint layer are alternately stacked layer by layer. The tuned mass damper provided with the constraint layer damping can achieve the required rigidity and damping in the case of occupying a smaller space, and provides a better damping effect.

Description

Technical Field

[0001] This invention relates to the field of tuned mass damper technology, and more particularly to a tuned mass damper with a constraint layer damping. Background Technology

[0002] Vibration is a significant factor affecting the normal operation of precision equipment such as CNC machine tools. It can cause a decrease in dynamic accuracy and a slow decline in precision, and in severe cases, it can lead to problems such as fatigue, wear, and noise radiation. Therefore, the application of vibration suppression technology for vibration reduction is crucial for precision equipment.

[0003] A tuned mass damper (TMD) is a common passive vibration damping device, often used for low-frequency vibration reduction in large structures. A tuned mass damper mainly consists of three parts: a mass block, a spring, and a damper. Its basic principle is to connect an additional mass block to the main structure via a spring and a damper, adjusting its natural frequency to near the primary vibration frequency that needs to be suppressed. When the main structure vibrates under external excitation, the tuned mass damper generates a force opposite to the direction of the vibration, dissipating some of the vibration energy as heat through the damper, thereby effectively reducing the vibration response of the main structure.

[0004] Currently, tuned mass dampers commonly employ viscous damping structures. While viscous dampers are relatively large and can be used in large structures where sufficient space is available, they are often unsuitable for smaller equipment due to insufficient installation space, hindering the application of traditional tuned mass dampers and preventing the achievement of optimal vibration reduction. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a tuned mass damper with a constraint layer damping. Because the constraint layer damping forms an integral flat structure with the elastic connection, the required stiffness and damping are achieved while occupying less space, thus providing a better vibration reduction effect.

[0006] The present invention provides a tuned mass damper with a constraint layer damping, the damper comprising a fixed part, an elastic connecting part and a mass part, wherein the mass part and the fixed part are connected through the elastic connecting part;

[0007] The elastic connection part has a thin-walled structure; At least one side of the elastic connection is provided with a constraint layer damping. The constraint layer damping includes one or more damping layers and one or more constraint layers, which are stacked alternately layer by layer.

[0008] Furthermore, the damping layer is a thin-layer structure of damping material; The constraint layer is a thin-layer structure with stiffness greater than that of the damping layer.

[0009] Furthermore, the thickness of the fixing part The thickness of the elastic connection portion The size relationship is: .

[0010] Furthermore, the mass unit is a composite structure formed by combining several small mass blocks.

[0011] Furthermore, the mass component includes a cavity structure filled with particulate matter.

[0012] Furthermore, the damper includes several mass parts and several elastic connecting parts, which are alternately connected to form a series cascade structure.

[0013] Furthermore, the length from the connection position between the elastic connecting part and the fixing part to the mounting position of the mass part on the elastic connecting part is the effective length of the elastic connecting part. The effective length of the elastic connection portion The effective length of the elastic connection can be adjusted. Maximum value of the adjustment range and minimum value The relationship is: .

[0014] Furthermore, the mass part and the elastic connecting part are fixedly connected to each other by a first connecting member.

[0015] Furthermore, the fixing part is fixed to the vibration damping object by a second connector.

[0016] This invention provides a tuned mass damper with a constraint layer damping. An elastic, bendable, and deformable connection is provided between the mass part and the fixed part. A constraint layer damping, consisting of a damping layer and a constraint layer stacked sequentially, is laid on the elastic connection. Because the constraint layer damping and the elastic connection form an integrated flat structure, the required stiffness and damping are achieved with a smaller footprint, providing superior vibration reduction. The mass part can be configured as a combination of small mass blocks, a cavity structure filled with particles, or a cascaded structure connected in series, adaptable to different vibration-damping main structures in various scenarios, thus offering wider application and greater adaptability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the tuned mass damper with constraint layer damping in Embodiment 1 of the present invention; Figure 2 This is a half-sectional schematic diagram of the tuned mass damper structure with constraint layer damping in Embodiment 1 of the present invention. Figure 3 yes Figure 1 Enlarged view of point a in the middle; Figure 4 This is yet another schematic diagram of the overall structure of the tuned mass damper with constraint layer damping in Embodiment 1 of the present invention. Figure 5 This is a schematic diagram of the overall structure of the tuned mass damper with constraint layer damping in Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of the overall structure of the tuned mass damper with constraint layer damping in Embodiment 3 of the present invention; Figure 7 This is a schematic diagram of the overall structure of the tuned mass damper with constraint layer damping in Embodiment 4 of the present invention; Figure 8 This is a schematic diagram of the overall structure of the tuned mass damper with constraint layer damping in Embodiment 5 of the present invention.

[0019] Reference numerals: 1. Fixing part; 2. Elastic connection part; 3. Mass part; 4. Constraint layer damping; 41. Damping layer; 42. Constraint layer; 51. First mounting position; 61. Second mounting position; 33. Small mass block; 31. First-stage mass part; 32. Second-stage mass part; 21. First-stage elastic connection part; 22. Second-stage elastic connection part. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In this invention, it should be understood that terms such as “comprising” or “having” are intended to indicate the presence of features, figures, steps, behaviors, components, portions or combinations thereof disclosed in this specification, and are not intended to exclude the possibility that one or more other features, figures, steps, behaviors, components, portions or combinations thereof are present or added.

[0022] It should also be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] Example 1 Embodiment 1 of the present invention provides a tuned mass damper with a constraint layer damping. The damper includes a fixed part, an elastic connection part, and a mass part, wherein the mass part and the fixed part are connected through the elastic connection part. The elastic connection part has a thin-walled structure; At least one side of the elastic connection is provided with a constraint layer damping. The constraint layer damping includes one or more damping layers and one or more constraint layers, which are stacked alternately layer by layer.

[0024] In one optional implementation of this embodiment, such as Figure 1 and Figure 2 As shown, Figure 1 This diagram shows an overall schematic of the tuned mass damper structure with constraint layer damping in Embodiment 1 of the present invention. Figure 2 This diagram shows a half-sectional view of a tuned mass damper structure with constraint layer damping according to Embodiment 1 of the present invention. Figure 2 The left half of the diagram is a cross-sectional view. The damper includes a fixed part 1, an elastic connecting part 2, and a mass part 3. The mass part 3 is connected to the fixed part 1 through the elastic connecting part 2.

[0025] Specifically, each side of the fixing part 1 is provided with an elastic connecting part 2 and a mass part 3, and there are two elastic connecting parts 2 and two mass parts 3 in total. The fixing part 1 is connected to the elastic connecting parts 2 on both sides respectively, and the mass parts 3 and elastic connecting parts 2 on the same side are connected to each other.

[0026] Furthermore, the mass part 3 and the fixing part 1 are connected by independent elastic connecting parts 2.

[0027] In an optional implementation of this embodiment, at least one side of the elastic connection portion 2 is provided with a constraint layer damping 4.

[0028] Specifically, such as Figure 1 and Figure 2As shown, the elastic connection part 2 is provided with a constraint layer damping 4 on both the front and back sides.

[0029] Furthermore, the mass part 3 is disposed at the far end of the front side of the elastic connection part 2, and the constraint layer damping 4 is disposed on one or both sides of the elastic connection part 2.

[0030] In an optional implementation of this embodiment, the constraint layer damping 4 includes one or more damping layers 41 and one or more constraint layers 42, which are stacked sequentially.

[0031] Specifically, such as Figure 3 As shown, Figure 3 yes Figure 1 The enlarged schematic diagram at point a shows that the constraint layer damping 4 disposed on the front side of the elastic connection part 2 includes two damping layers 41 and two constraint layers 42, and the constraint layer damping 4 disposed on the back side of the elastic connection part 2 includes one damping layer 41 and one constraint layer 42. The damping layer 41 is attached to the surface of the elastic connection part 2, that is, the damping layer 41 is disposed between the surface of the elastic connection part 2 and the constraint layer 42, or between the two constraint layers 42.

[0032] Furthermore, the number of damping layers 41 and the laying size of the constraint layer damping 4 are set according to actual needs.

[0033] Considering that traditional dampers using viscous damping structures are large in size and cannot be applied to small structural equipment products, this embodiment provides a damper using a constraint layer damping. Because the constraint layer damping and the elastic connection form an integrated flat structure, the required stiffness and damping are achieved while occupying less space, providing a better vibration reduction effect.

[0034] In an optional implementation of this embodiment, the damping layer 41 is a thin layer structure of damping material.

[0035] Specifically, the damping material used in the damping layer 41 includes rubber, plastic, foam plastic, high-damping alloy material or damping coating.

[0036] In an optional implementation of this embodiment, the constraint layer 42 is a thin layer structure with stiffness much greater than that of the damping layer.

[0037] Specifically, the constraint layer 42 may be a thin metal sheet or other thin sheet of high-rigidity material with elasticity.

[0038] In an optional implementation of this embodiment, the elastic connecting part 2 is a thin-walled structure.

[0039] Specifically, the elastic connecting part 2 is an extended metal sheet that can undergo elastic bending deformation.

[0040] In one optional implementation of this embodiment, such as Figure 4 As shown, Figure 4 This shows another schematic diagram of the overall structure of the tuned mass damper with constraint layer damping according to Embodiment 1 of the present invention. Figure 4 The mass part 4 is hidden. The elastic connecting part 2 is provided with a first mounting position 51. The mass part 3 and the elastic connecting part 2 are fixedly connected to each other by a first connector installed on the first mounting position 51.

[0041] Specifically, the first connector may be a connecting screw.

[0042] In an optional implementation of this embodiment, the fixing part 1 is provided with a second mounting position 61, and the fixing part is fixed to the vibration damping object by a second connector installed on the second mounting position 61.

[0043] Specifically, the second connector can be a connecting screw.

[0044] In an optional implementation of this embodiment, the thickness of the fixing part 1 is... The thickness of the elastic connection portion 2 The size relationship is: .

[0045] Here, we consider that the elastic connection part 2 is the component that needs to be bent to reduce vibration, while the fixed part 1 is the fixed component for the tuned mass damper to be installed on the main structure that needs to be damped. Therefore, the thickness of the fixed part 1 should be twice or more than the thickness of the elastic connection part 2. This is to ensure that the bending degree of the elastic connection part 2 is not affected, and to ensure that the connection between the fixed part and the main structure is firm and not affected by the bending of the elastic connection part 2, thereby improving the reliability of the damper structure.

[0046] In an optional implementation of this embodiment, the length from the connection position between the elastic connecting part and the fixing part to the mounting position of the mass part on the elastic connecting part is the effective length of the elastic connecting part. .

[0047] Specifically, such as Figure 2 As shown, the effective length of the elastic connection portion The length is from the connection end of the fixing part 1 and the elastic connection part 2 to the installation position of the mass part 3 on the elastic connection part 2.

[0048] Here, we consider the different installation positions of mass part 3 on elastic connection part 2, and the effective length of elastic connection part. The different components result in different vibration reduction frequency bands. Therefore, the effective length of the elastic connection can be changed by adjusting the mounting position of the mass part 3 on the elastic connection part 2. The natural frequency of the tuned mass damper is adjusted to be near the vibration frequency that needs to be suppressed, thus achieving a better damping effect.

[0049] Furthermore, the effective length of the elastic connection portion The effective length of the elastic connection can be adjusted. Maximum value of the adjustment range and minimum value The relationship is: .

[0050] Furthermore, the working principle of the tuned mass damper with constraint layer damping in this embodiment includes: When the fixing part 1 is installed on the main structure of the object requiring vibration damping, and the main structure vibrates, the mass part 3 and the elastic connection part 2 vibrate relative to each other. The elastic connection part 2 connecting the mass part 3 and the fixing part 1 undergoes bending deformation. Both the damping layer 41 and the constraint layer 42 in the constraint layer damping 4 laid on the elastic connection part 2 undergo bending deformation, and the damping layer 41 undergoes significant shear deformation, thus creating a damping effect. Under appropriate natural frequency and damping action, this tuned mass damper can achieve vibration absorption.

[0051] In summary, Embodiment 1 of the present invention provides a tuned mass damper with a constraint layer damping. An elastic connection with elasticity and bendability is provided between the mass part and the fixed part, and a constraint layer damping consisting of a damping layer and a constraint layer stacked in sequence is laid on the elastic connection. Because the constraint layer damping and the elastic connection form an integrated flat structure, the required stiffness and damping are achieved with a smaller space, providing a better vibration reduction effect.

[0052] Example 2 Embodiment 2 of the present invention provides a tuned mass damper with a constraint layer damping. The damper includes a fixed part, an elastic connection part, and a mass part, wherein the mass part and the fixed part are connected through the elastic connection part. The elastic connection part has a thin-walled structure; At least one side of the elastic connection is provided with a constraint layer damping. The constraint layer damping includes one or more damping layers and one or more constraint layers, which are stacked alternately layer by layer.

[0053] In one optional implementation of this embodiment, such as Figure 5 As shown, Figure 5This diagram shows an overall schematic of a tuned mass damper with a constraint layer damping in Embodiment 2 of the present invention. Its structure is similar to the tuned mass damper in Embodiment 1, except that: In one optional implementation of this embodiment, each of the four sides of the fixing part 1 is provided with an elastic connecting part 2, for a total of four elastic connecting parts 2. The fixing part 1 is connected to the four elastic connecting parts 2 respectively. The mass part 3 is a ring structure, and its inner ring is connected to the elastic connecting parts 2 in all four directions.

[0054] In an optional implementation of this embodiment, a constraint layer damping 4 is laid on the elastic connection part 2.

[0055] In an optional implementation of this embodiment, the mass unit 3 is a composite structure formed by combining a plurality of small mass blocks 33.

[0056] Specifically, the mass part 3 is composed of several layers of stacked annular small mass blocks 33, forming a combined structure.

[0057] Here, the mass of the mass part 3 can be adjusted by changing the number of small mass blocks 33. By matching the effective length of the elastic connection part corresponding to the relative length of the mass part 3 and the elastic connection part 2, the natural frequency of the tuned mass damper can be adjusted to be near the vibration frequency that needs to be suppressed, thereby achieving a better vibration absorption effect.

[0058] In summary, Embodiment 2 of the present invention provides a tuned mass damper with a constraint layer damping. An elastic connection with elasticity and bendability is provided between the mass part and the fixed part. A constraint layer damping, consisting of a damping layer and a constraint layer stacked sequentially, is laid on the elastic connection. Because the constraint layer damping and the elastic connection form an integrated flat structure, the required stiffness and damping are achieved with a smaller space, providing a better vibration reduction effect. The mass part can be configured as a combination structure of small mass blocks, adaptable to different scenarios requiring vibration reduction, resulting in a wider range of applications and a higher degree of adaptability.

[0059] Example 3 Embodiment 3 of the present invention provides a tuned mass damper with a constraint layer damping. The damper includes a fixed part, an elastic connection part, and a mass part, wherein the mass part and the fixed part are connected through the elastic connection part. The elastic connection part has a thin-walled structure; At least one side of the elastic connection is provided with a constraint layer damping. The constraint layer damping includes one or more damping layers and one or more constraint layers, which are stacked alternately layer by layer.

[0060] In one optional implementation of this embodiment, such as Figure 6 As shown, Figure 6 This diagram shows an overall schematic of a tuned mass damper with a constraint layer damping in Embodiment 3 of the present invention. Its structure is similar to the tuned mass damper in Embodiment 1, except that: In one optional implementation of this embodiment, there are 4 fixing parts 1 and 4 elastic connecting parts 2, which are respectively connected to the fixing parts 1. There is 1 mass part 3, which is connected to the 4 elastic connecting parts 2. The elastic connecting parts 2 are divided into two segments, which are at a certain angle to each other.

[0061] In an optional implementation of this embodiment, the mass part 3 is a cavity structure, and the cavity of the cavity structure is filled with particulate matter.

[0062] Specifically, such as Figure 6 As shown, the mass part 3 is a square cavity structure, and the cavity structure is filled with particulate matter (particulate matter not shown). The cavity structure includes a closed cavity bottom and a closed cover on the top of the cavity (closed cover not shown).

[0063] Furthermore, when the mass part 3 and the elastic connection part 2 vibrate relative to each other, the particles filled in the mass part 3 produce a particle damping effect. The mutual friction between the particles and between the particles and the inner wall of the cavity structure will convert the mechanical energy generated by the vibration into heat energy and dissipate it, further increasing the loss factor.

[0064] In summary, Embodiment 3 of the present invention provides a tuned mass damper with a constraint layer damping. An elastic connection with elasticity and bendability is provided between the mass part and the fixed part. A constraint layer damping, consisting of a damping layer and a constraint layer stacked sequentially, is laid on the elastic connection. Because the constraint layer damping and the elastic connection form an integrated flat structure, the required stiffness and damping are achieved with a smaller space, providing a better vibration reduction effect. The mass part can be configured as a cavity structure filled with particles, using the particle damping effect to improve the loss factor. This allows it to adapt to different scenarios requiring vibration reduction, resulting in a wider range of applications and a higher degree of adaptability.

[0065] Example 4 Embodiment 4 of the present invention provides a tuned mass damper with a constraint layer damping. The damper includes a fixed part, an elastic connection part, and a mass part, wherein the mass part and the fixed part are connected through the elastic connection part. The elastic connection part has a thin-walled structure; At least one side of the elastic connection is provided with a constraint layer damping. The constraint layer damping includes one or more damping layers and one or more constraint layers, which are stacked alternately layer by layer.

[0066] In one optional implementation of this embodiment, such as Figure 7 As shown, Figure 7 This diagram shows an overall schematic of a tuned mass damper with a constraint layer damping in Embodiment 4 of the present invention. Its structure is similar to the tuned mass damper in Embodiment 3, except that: In one optional implementation of this embodiment, there are 3 fixing parts 1, 3 elastic connecting parts 2 connected to the fixing parts 1 respectively, and 1 mass part 3 connected to the 3 elastic connecting parts 2.

[0067] In an optional implementation of this embodiment, the mass part 3 is a circular cavity structure, and the elastic connecting part 2 forms part of a cylindrical surface structure around the mass part 3.

[0068] In summary, Embodiment 4 of the present invention provides a tuned mass damper with a constraint layer damping. An elastic connection with elasticity and bendability is provided between the mass part and the fixed part. A constraint layer damping, consisting of a damping layer and a constraint layer stacked sequentially, is laid on the elastic connection. Because the constraint layer damping and the elastic connection form an integrated flat structure, the required stiffness and damping are achieved with a smaller space, providing a better vibration reduction effect. The mass part can be configured as a cavity structure filled with particles, using the particle damping effect to improve the loss factor. This allows it to adapt to different scenarios requiring vibration reduction, resulting in a wider range of applications and a higher degree of adaptability.

[0069] Example 5 Embodiment 5 of the present invention provides a tuned mass damper with a constraint layer damping. The damper includes a fixed part, an elastic connecting part, and a mass part, wherein the mass part and the fixed part are connected through the elastic connecting part. The elastic connection part has a thin-walled structure; At least one side of the elastic connection is provided with a constraint layer damping. The constraint layer damping includes one or more damping layers and one or more constraint layers, which are stacked alternately layer by layer.

[0070] In one optional implementation of this embodiment, such as Figure 8 As shown, Figure 8 This diagram shows an overall schematic of a tuned mass damper with a constraint layer damping in Embodiment 5 of the present invention. Its structure is similar to the tuned mass damper in Embodiment 1, except that: In one optional implementation of this embodiment, the damper includes several mass parts and several elastic connection parts, which are alternately connected to form a series cascade structure.

[0071] Specifically, the damper includes several mass units connected in series. The first-stage mass unit is connected to the fixed part through an elastic connection, and the second-stage mass unit is also connected to the first-stage mass unit through an elastic connection. If there is a third-stage mass unit, then the third-stage mass unit is also connected to the second-stage mass unit through an elastic connection, and so on. In this way, a series cascade structure is formed in general.

[0072] Furthermore, the damper includes a fixed part 1, a first-stage mass part 31, a second-stage mass part 32, a first-stage elastic connection part 21, and a second-stage elastic connection part 22. The first-stage mass part 31, the second-stage mass part 32, the first-stage elastic connection part 21, and the second-stage elastic connection part 22 are alternately connected. That is, the fixed part 1 is connected to the corresponding first-stage elastic connection part 21, the first-stage elastic connection part 21 is connected to the first-stage mass part 31, the first-stage mass part 31 is connected to the second-stage elastic connection part 22, and the second-stage elastic connection part 22 is connected to the second-stage mass part 32.

[0073] Here, a series-connected cascade structure is formed by multiple mass components and elastic connecting components, which can absorb vibrations in more frequency bands at the same time, thereby providing a better vibration reduction effect.

[0074] In an optional implementation of this embodiment, both the first-stage elastic connection portion 21 and the second-stage elastic connection portion 22 are provided with a constraint layer damping 4.

[0075] In summary, Embodiment 5 of the present invention provides a tuned mass damper with a constraint layer damping. An elastic connection, capable of elasticity and bendability, is provided between the mass part and the fixed part. A constraint layer damping, consisting of a damping layer and a constraint layer stacked sequentially, is laid on the elastic connection. Because the constraint layer damping and the elastic connection form an integrated flat structure, the required stiffness and damping are achieved with a smaller space, providing a better vibration reduction effect. The mass part and the elastic connection can be configured as a cascaded structure connected in series, allowing for simultaneous vibration absorption across more frequency bands, thereby providing an even better vibration reduction effect.

[0076] The above provides a detailed description of a tuned mass damper with constrained layer damping provided by the present invention. Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, which may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0077] Furthermore, the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A tuned mass damper with a constraint layer damping, characterized in that, The damper includes a fixed part, an elastic connection part, and a mass part, wherein the mass part is connected to the fixed part through the elastic connection part; The elastic connection part has a thin-walled structure; At least one side of the elastic connection is provided with a constraint layer damping. The constraint layer damping includes one or more damping layers and one or more constraint layers, which are stacked alternately layer by layer.

2. The tuned mass damper as described in claim 1, characterized in that, The damping layer is a thin layer structure of damping material; The constraint layer is a thin-layer structure with stiffness greater than that of the damping layer.

3. The tuned mass damper as described in claim 1, characterized in that, The thickness of the fixing part The thickness of the elastic connection portion The size relationship is: .

4. The tuned mass damper as described in claim 1, characterized in that, The mass unit is a composite structure formed by combining several small mass blocks.

5. The tuned mass damper as described in claim 1, characterized in that, The mass component includes a cavity structure filled with particulate matter.

6. The tuned mass damper as described in claim 1, characterized in that, The damper includes several mass parts and several elastic connecting parts, which are alternately connected to form a series cascade structure.

7. The tuned mass damper as described in claim 1, characterized in that, The effective length of the elastic connection is the length from the connection point between the elastic connection and the fixing part to the mounting position of the mass part on the elastic connection. The effective length of the elastic connection portion The effective length of the elastic connection can be adjusted. Maximum value of the adjustment range and minimum value The relationship is: .

8. The tuned mass damper as described in claim 1, characterized in that, The mass part and the elastic connecting part are fixedly connected to each other by a first connector.

9. The tuned mass damper as described in claim 1, characterized in that, The fixing part is fixed to the vibration damping object by the second connector.

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