CN212053292U - Eddy current particle damper - Google Patents
Eddy current particle damper Download PDFInfo
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- CN212053292U CN212053292U CN201922289471.XU CN201922289471U CN212053292U CN 212053292 U CN212053292 U CN 212053292U CN 201922289471 U CN201922289471 U CN 201922289471U CN 212053292 U CN212053292 U CN 212053292U
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Abstract
The utility model discloses an eddy current particle damper relates to damping vibration attenuation technical field. An eddy current particle damper comprises a shell, and a spring, a mass block and an eddy current damper which are arranged in the shell; the mass block is arranged in the shell through a spring, and can vibrate in the vertical direction in the shell by taking the spring as a support; the eddy current damper is arranged on the side part of the mass block and generates damping force when the mass block vibrates; particle dampers are installed on the upper portion and/or the lower portion of the mass block, particle groups are filled in the particle dampers, and vibration energy is consumed through friction and/or collision of the particle groups. The utility model discloses compound the function of eddy current damper and particle damper, its structure is ingenious, low cost, and stability and durability are good, have obtained good damping effect to striding the structure greatly, and easily promote.
Description
Technical Field
The utility model relates to a damping vibration attenuation technical field especially relates to an eddy current particle damper.
Background
To the effect of vertical forces such as people's load, vehicle load, the structural load capacity of striding greatly such as bridge, market, exhibition room is limited, though the intensity of structure can satisfy the requirement, can not take place intensity destruction usually. However, if the amplitude of the acceleration due to the resonance of the structure is too large, it is easy to cause a panic in the human mind once the human comfort tolerance limit is exceeded. If the above problems are solved only by means of increasing the cross section and changing the structural form, it is unreasonable and unrealistic from the technical, economical and space utilization viewpoints, and thus new techniques must be sought for solving the above problems.
The technology of energy dissipation and vibration reduction (also called energy dissipation and vibration reduction) is a technology capable of effectively reducing the structural vibration reaction. A structural damping device (also called a dynamic vibration absorber) is one of structural passive control measures and is mainly applied to wind resistance, shock resistance and improvement of human body comfort. The damping device is additionally arranged on the main structure, and when the main structure is subjected to external dynamic force, the damping device provides a force with almost the same frequency and opposite to the moving direction of the main structure, so that the structural response caused by external excitation is partially counteracted. The structural damping device is widely concerned because of the advantages of small change to the original building structure, convenient construction, obvious vibration damping control effect and the like, and has a large amount of application in domestic and foreign building structures.
At present, a hydraulic viscous damper is usually adopted for a structural damping device to provide damping, certain rigidity exists while the damping is provided, the rigidity and the damping can not be completely separated, and design analysis is influenced. Meanwhile, the hydraulic viscous damper also has the problems of oil leakage, difficult maintenance, difficult later-stage adjustment and the like, and the maintenance difficulty and cost are increased. The advent of eddy current dampers solved the above problems. The working principle of the eddy current damper is as follows: the conductor mass block cuts magnetic induction lines when moving, induced electromotive force can be generated in the conductor according to a Faraday electromagnetic induction principle to form an eddy current, and vibration energy is converted into heat of the conductor, so that vibration control is realized. The eddy current damper has the advantages that: the magnet is not in direct contact with the conductor, and friction damping and abrasion are avoided; the device is not influenced by the environment such as temperature and the like; the oil leakage and the like do not exist, and the oil-leakage-free anti-rust paint is easy to maintain and has good durability. However, for the vertical vibration problem of the large span structure, the damping effect relying on the eddy current damper as the damping is not ideal, and the damping efficiency is yet to be further improved.
Disclosure of Invention
The utility model aims to provide a: the defects of the prior art are overcome, and the eddy current particle damper is provided. The utility model provides an eddy current particle damper has compounded the function of eddy current damper and particle damper, and its structure is ingenious, low cost, and stability and durability are good, have obtained good damping effect to striding the structure greatly, and easily promote.
In order to achieve the above object, the utility model provides a following technical scheme:
an eddy current particle damper comprises a shell, and a spring, a mass block and an eddy current damper which are arranged in the shell;
the mass block is mounted in the housing by a spring, the spring is vertically arranged between the mass block and the housing as a stiffness system for providing vertical stiffness, and the mass block can be suspended in the housing by the spring at the upper part and/or can vibrate in the vertical direction at the lower part;
the eddy current damper is arranged on the side part of the mass block, one end of the eddy current damper is connected with the side part of the mass block, the other end of the eddy current damper is connected with the shell, and the eddy current damper generates damping force when the mass block vibrates;
particle dampers are mounted on the upper portion and/or the lower portion of the mass block and comprise a cavity formed by the shell, particle groups are filled in the cavity, and vibration energy is consumed through friction and/or collision between the particle groups and the shell.
Further, a partition plate is arranged in a cavity formed by the shell to divide the cavity into a plurality of sub-cavities, particle groups are filled in the sub-cavities, and vibration energy is consumed through friction and/or collision between the particle groups and the partition plate.
Further, the particle group consists of a plurality of 1)60mm spheres with different diameters, and the spheres are formed by mixing one or more of steel spheres, lead spheres, aluminum spheres, ceramic spheres, glass spheres, plastic spheres and alloy spheres.
Further, the inner surface or the outer surface of the shell of the particle damper or the interlayer of the shell is provided with a sound absorption material layer to reduce the transmission of noise generated by friction and/or collision of particle groups.
Further, the eddy current damper includes a magnet portion and a conductor portion that are separately provided;
the magnet part comprises a permanent magnet and magnet back iron, the conductor part comprises a conductor plate and conductor back iron, and the permanent magnet is positioned between the magnet back iron and the conductor plate; when the vibration is carried out, the conductor plate and the permanent magnet move relatively, the conductor plate cuts magnetic lines of force to generate eddy current to interact with the permanent magnet, and damping force for blocking the relative movement is generated.
Further, a magnet part or a conductor part of the eddy current damper is arranged on the mass block, and correspondingly, the conductor part or the magnet part is arranged on the shell; and the permanent magnets are arranged on the surface of the magnet back iron at intervals and are far away from the conductor plate, the magnetic poles of the permanent magnet pairs are arranged in a mutually reversed mode, and when the conductor plate and the permanent magnets move relatively, the conductor plate cuts magnetic lines of force to generate eddy current.
Further, the back iron of the magnet portion or the conductor portion mounted on the mass block has a height greater than that of the mass block so that the back iron and the mass block form a recess having an upper cavity and/or a lower cavity, the particle damper being mounted in the recess.
Further, the shape and size of the housing of the particle damper are adapted to the aforementioned recess, so that the particle damper can be fixedly mounted in the recess and brought into close contact with the mass and the back iron.
Furthermore, a plurality of springs are arranged on the plane, and the springs are arranged in a central symmetry mode.
Further, the shell comprises a main body frame and a containment steel plate, the main body frame forms a framework of the shell, and the containment steel plate forms peripheral protection of the shell.
Furthermore, the mass block is formed by mixing one or more of steel, lead blocks, concrete, grouting materials and liquid.
The utility model discloses owing to adopt above technical scheme, compare with prior art, as the example, have following advantage and positive effect:
1) the eddy current damper and the particle damper are combined, the structure is ingenious, the cost is low, the stability and the durability are good, a good vibration damping effect is obtained for a large-span structure, and the electric eddy current damper and the particle damper are easy to popularize.
2) The eddy current damper has no mechanical wear, no initial starting force, and is easy to maintain.
3) The stiffness and frequency of the damping device can be adjusted by adjusting the mass size or replacing the springs.
Drawings
Fig. 1 is a schematic structural diagram of an eddy current particle damper according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an eddy current particle damper according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a particle damper according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of an operation of an eddy current damper according to an embodiment of the present invention.
Fig. 5 is a third schematic structural diagram of an eddy current particle damper according to an embodiment of the present invention.
Fig. 6 is a schematic view illustrating an installation of a particle damper according to an embodiment of the present invention.
Description of reference numerals:
an eddy current particle damper 100;
a housing 110;
a spring 120;
a mass 130;
an eddy current damper 140, a permanent magnet 141, a magnet back iron 142, a conductor plate 143, a conductor back iron 144, and a mounting bracket 145;
a particle damper 150, a housing 151, a partition 152, and a particle group 153.
Detailed Description
The eddy current particle damper disclosed in the present invention is further described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that technical features or combinations of technical features described in the following embodiments should not be considered as being isolated, and they may be combined with each other to achieve better technical effects. In the drawings of the embodiments described below, the same reference numerals appearing in the respective drawings denote the same features or components, and may be applied to different embodiments. Thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
It should be noted that the structures, ratios, sizes, etc. shown in the drawings of the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, and any modifications of the structures, changes of the ratio relationships, or adjustments of the sizes should fall within the scope that the technical contents disclosed in the present invention can cover without affecting the functions and purposes that the present invention can achieve. The scope of the preferred embodiments of the present invention includes other implementations in which functions may be performed out of the order described or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
Examples
Referring to fig. 1 and fig. 2, a schematic structural diagram of an eddy current particle damper according to an embodiment of the present invention is shown.
The eddy current particle damper 100 includes a housing 110, and a spring 120, a mass 130, and an eddy current damper 140 disposed in the housing 110.
The mass 130 is mounted in the housing 110 by a spring 120. The springs 120 are vertically disposed between the mass 130 and the housing 110 as a stiffness system for providing vertical stiffness, and the mass 130 can be vertically suspended and/or supported in the housing 110 by the springs 120 for vibration in a vertical direction.
In this embodiment, the spring 120 may act as an upper and/or lower support for the mass 130 (e.g., the spring 120 in FIG. 1 is mounted above the mass to form an upper suspension support, or the spring 120 in FIG. 2 is mounted below the mass to form a lower support).
In the present embodiment, one or more springs 120 as the stiffness system may be arranged on a plane. Preferably, the mass is mounted by more than 3 springs 120, and the plurality of vertically arranged springs are mounted on the mass in a centrosymmetric manner.
The frequency and rigidity of the spring are adjusted (the spring is detachably arranged between the mass block and the shell, and the vibration absorption frequency can be adjusted by replacing the spring with different rigidity.
The eddy current damper 140 is installed at a side of the mass 130, and one end of the eddy current damper 140 is connected to the side of the mass 130 and the other end is connected to the housing 110, and the eddy current damper generates a damping force when the mass 130 vibrates.
As shown in connection with fig. 3, the particle damper 150 includes a cavity formed by a housing 151 filled with a group of particles that dissipate vibrational energy through friction and/or collisions between the group of particles themselves and between the group of particles and the housing.
Preferably, in this embodiment, one or more partition plates 152 are disposed in the cavity, and the partition plates 152 may partition the cavity into a plurality of sub-cavities, each of which may be filled with a particle group 153, and vibration energy is dissipated by friction and/or collision between the particle groups 153 themselves and between the particle groups 153 and the shell 151 and the partition plates 152. The volume of the population 153 may be 30% and preferably 40%) of the volume of the chamber of each subchamber is 80%.
The cavity can be a cuboid, and also can be other shapes such as a cylinder, a prism, a curved surface body and the like, and the shape of the cavity should not be taken as the limitation of the utility model.
The particle population 153 is preferably composed of a plurality of 1) spheres of unequal diameter of 60 mm. On one hand, collision, friction and momentum exchange among the spheres and plastic deformation of the tiny particles during mutual collision can consume the energy of a vibration system, so that the effect of vibration reduction is realized; on the other hand, the collision, friction of the interaction between the sphere and the vessel wall, including the shell and the baffle, can also dissipate the energy of the vibration system.
The ball body can be formed by mixing one or more of a steel ball body, a lead ball body, an aluminum ball body, a ceramic ball body, a glass ball body, a plastic ball body and an alloy ball body. Preferably, in this embodiment, the ball is a steel ball. Of course, those skilled in the art will recognize spheres as the preferred vibration-damping particles, and other shapes of vibration-damping particles may be used in the particle damper described above, which should not be construed as limiting the present invention.
When in use, the eddy current particle damper 100 is installed at the reinforced part of the large span structure, and the outer shell serves as the peripheral framework and the protective structure of the whole damping device. When the main structure is subjected to external dynamic action, along with the increase of the response of the main structure, the eddy current particle damper firstly applies larger damping force to the main structure, and consumes a large amount of energy of the structure, so that the vibration of the structure can be effectively controlled. The particle damper and the eddy current damper are jointly used as a damping system of the damping device, so that the vibration time and the vibration stroke of the damping device can be reduced, and the motion energy can be dissipated.
In one implementation, noise reduction structures may also be provided on the particle dampers to reduce noise transmission, taking into account noise generated by particle swarm friction and/or collisions.
Specifically, a sound absorbing material layer may be disposed on an inner surface of a housing of the particle damper, or on an outer surface thereof, or a sound absorbing material layer may be installed by disposing a housing interlayer, so that sound is blocked by the sound absorbing material layer, thereby reducing propagation of noise generated by friction and/or collision of particle groups. The sound absorbing material may be any known sound absorbing material such as sound absorbing cotton, inorganic foam sound absorbing material, foam plastic sound absorbing material, and the like.
The eddy current damper 140 is installed at a side of the mass 130, and includes a magnet portion and a conductor portion separately provided.
The magnet part comprises a permanent magnet and magnet back iron, the conductor part comprises a conductor plate and conductor back iron, and the permanent magnet is positioned between the magnet back iron and the conductor plate; when the vibration is carried out, the conductor plate and the permanent magnet move relatively, the conductor plate cuts magnetic lines of force to generate eddy current to interact with the permanent magnet, and damping force for blocking the relative movement is generated. When the eddy current damper is installed, the magnet portion or the conductor portion of the eddy current damper may be installed on the mass block, and correspondingly, the conductor portion or the magnet portion may be installed on the housing.
In the scheme, the movement mechanical energy is converted into the electric energy of the conductor plate through the electric eddy current damper, and then the electric energy is finally converted into the heat energy through the resistor of the conductor plate to be consumed, so that the damping effect is generated. The eddy current damper not only can realize non-contact and no mechanical abrasion, but also does not need initial starting force, and has the advantages of simple structure, low maintenance requirement and good durability.
In an exemplary embodiment, referring to fig. 4, eddy current damper 140 includes a permanent magnet 141, a magnet back iron 142, a conductor plate 143, and a conductor back iron 144, with permanent magnet 141 being positioned between magnet back iron 142 and conductor plate 143. When the vibration is generated, the conductor plate 143 and the permanent magnet 141 move relatively, the conductor plate 143 cuts magnetic lines of force to generate an eddy current to interact with the permanent magnet 141, and a damping force for blocking the relative movement is generated.
A conductor back iron 144 is mounted on the housing, on which conductor plate 143 is mounted; correspondingly, a magnet back iron 142 is arranged at the side part of the mass block 130, a pair of permanent magnets 141 are arranged on the surface of the magnet back iron 142 at intervals and far away from the conductor plate 143, the magnetic poles of the permanent magnet pair are arranged in an inverted mode, and when the conductor plate 143 and the permanent magnets 141 move relatively, the conductor plate 143 cuts magnetic lines of force to generate eddy current. The eddy current interacts with the permanent magnet 141 to produce a damping force that resists relative motion.
In the present embodiment, the interval between the conductor plate and the permanent magnet is adjustable in consideration of adjustment of the magnitude of the damping force. For example, a mounting bracket 145 may be provided, by which mounting bracket 145 conductor back iron 144 is mounted on the housing, said mounting bracket 145 being a length-adjustable bracket.
By way of example and not limitation, mounting bracket 145 may include a mounting beam for securing conductor back iron 144 and a pair of bracket arms, one on each side of the mounting beam, with one end of the bracket arms connected to the mounting beam and the other end connected to housing 110. The support arm is of a telescopic structure, and the length of the support arm is adjusted through the telescopic of the support arm, so that the transverse distance between the conductor plate on the conductor back iron 144 and the permanent magnet is adjusted, and the damping force is adjusted.
It should be noted that although fig. 1 and 2 only illustrate the particle dampers 150 being mounted on the upper portion of the mass block 130, the particle dampers 150 can be mounted on the lower portion of the mass block 130 to achieve the same effect, as shown in fig. 5. At this time, the spring 120 may be disposed above and/or below the mass.
In this embodiment, in order to improve the structural integrity and compactness of the damper, the height of the back iron corresponding to the magnet or conductor part mounted on the mass 130 is greater than that of the mass 130, so that the back iron and the mass 130 can form a groove having an upper cavity and/or a lower cavity, and the particle damper 150 is mounted in the groove.
Preferably, the shape and size of the housing of the particle damper 150 are adapted to the aforementioned recess, so that the particle damper can be fixedly mounted in the recess and in close contact with the mass and back iron. Referring to fig. 6, the length and width of the housing, such as the particle damper 150, are the same as the groove length and width, and the height of the housing is equal to the height of the groove, so that the particle damper can completely fill the groove and be tightly connected with the mass at the bottom and the back iron at the sides. When the vibration is carried out, the whole formed by the mass block, the particle damper and the back iron can move up and down, so that the conductor plate and the permanent magnet move relatively, the conductor plate cuts magnetic lines of force to generate an eddy current, and the eddy current interacts with the permanent magnet to generate a damping force for blocking the relative movement. At the same time, the friction and/or collisions between the particle clusters themselves and between the particle clusters and the shell and the partition dissipate vibration energy in the particle damper.
In this embodiment, the housing 110 includes a main frame and a steel enclosure plate, the main frame forms a framework of the housing, and the steel enclosure plate forms a peripheral protection of the housing.
Specifically, the enclosure steel plate can include roof, bottom plate and side wall board, according to shell 110's shape, side wall board can constitute circularly, also can constitute squarely, or other shapes, and it should not regard as right the utility model discloses a restriction.
In this embodiment, the frequency of the damping device can be adjusted by adjusting the size of the mass block or replacing the spring.
According to the structural dynamics, the damping device belongs to a single-degree-of-freedom system, and the calculation formula of the frequency of the damping device is as follows:
wherein ω is the circular frequency; k is stiffness; m is mass; f is the frequency.
And (2) calculating to obtain a final frequency calculation formula by integrating the formula (1) and the formula (2) as follows
As can be seen from the formula (3), the frequency f is related to the mass of the mass block and the stiffness of the spring, and the frequency of the damping device can be adjusted by adjusting the size of the mass block or replacing the spring.
The mass block is preferably formed by mixing one or more of steel, lead block, concrete, grouting material and liquid.
In the description above, the disclosure of the present invention is not intended to limit itself to these aspects. Rather, the various components may be selectively and operatively combined in any number within the intended scope of the present disclosure. In addition, terms like "comprising," "including," and "having" should be interpreted as inclusive or open-ended, rather than exclusive or closed-ended, by default, unless explicitly defined to the contrary. All technical, scientific, or other terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. Common terms found in dictionaries should not be interpreted too ideally or too realistically in the context of related art documents unless the present disclosure expressly limits them to that. Any alterations and modifications of the present invention based on the above disclosure will be apparent to those skilled in the art from the present disclosure, and all such modifications and modifications are intended to fall within the scope of the appended claims.
Claims (10)
1. An eddy current particle damper, includes the shell to and spring, quality piece and eddy current damper that sets up in the shell, its characterized in that:
the mass block is mounted in the housing by a spring, the spring is vertically arranged between the mass block and the housing as a stiffness system for providing vertical stiffness, and the mass block can be suspended in the housing by the spring at the upper part and/or can vibrate in the vertical direction at the lower part;
the eddy current damper is arranged on the side part of the mass block, one end of the eddy current damper is connected with the side part of the mass block, the other end of the eddy current damper is connected with the shell, and the eddy current damper generates damping force when the mass block vibrates;
particle dampers are mounted on the upper portion and/or the lower portion of the mass block and comprise a cavity formed by the shell, particle groups are filled in the cavity, and vibration energy is consumed through friction and/or collision between the particle groups and the shell.
2. The eddy current particle damper as claimed in claim 1, wherein: be provided with the baffle in the cavity that the casing formed in order to separate into a plurality of sub-chambeies with the cavity, the sub-filling has the granule crowd, consumes the vibration energy through the friction and/or the collision between granule crowd and the baffle in the sub-chamber.
3. The eddy current particle damper as claimed in claim 1, wherein: the particle group consists of a plurality of spheres with different diameters of 1-60 mm; the ball body is formed by mixing one or more of a steel ball body, a lead ball body, an aluminum ball body, a ceramic ball body, a glass ball body, a plastic ball body and an alloy ball body.
4. The eddy current particle damper as claimed in claim 1, wherein: the inner surface or the outer surface of the shell of the particle damper or the interlayer of the shell is provided with a sound absorption material layer to reduce the transmission of noise generated by friction and/or collision of particle groups.
5. The eddy current particle damper as claimed in claim 1, wherein: the eddy current damper comprises a magnet part and a conductor part which are separately arranged;
the magnet part comprises a permanent magnet and magnet back iron, the conductor part comprises a conductor plate and conductor back iron, and the permanent magnet is positioned between the magnet back iron and the conductor plate; when the vibration is carried out, the conductor plate and the permanent magnet move relatively, the conductor plate cuts magnetic lines of force to generate eddy current to interact with the permanent magnet, and damping force for blocking the relative movement is generated.
6. The eddy current particle damper as claimed in claim 5, wherein: installing a magnet part or a conductor part of the eddy current damper on the mass block, and correspondingly installing the conductor part or the magnet part on the shell; and the permanent magnets are arranged on the surface of the magnet back iron at intervals and are far away from the conductor plate, the magnetic poles of the permanent magnet pairs are arranged in a mutually reversed mode, and when the conductor plate and the permanent magnets move relatively, the conductor plate cuts magnetic lines of force to generate eddy current.
7. The eddy current particle damper as claimed in claim 6, wherein: the back iron of the magnet portion or the conductor portion mounted on the mass block has a height greater than that of the mass block so that the back iron and the mass block form a recess having an upper cavity and/or a lower cavity, the particle damper being mounted in the recess.
8. The eddy current particle damper as claimed in claim 7, wherein: the shape and size of the housing of the particle damper are adapted to the aforementioned recess so that the particle damper can be fixedly mounted in the recess and in close contact with the mass and back iron.
9. The eddy current particle damper as claimed in claim 1, wherein: the springs are arranged on a plane and are arranged in a central symmetry mode;
the shell comprises a main body frame and a containment steel plate, wherein the main body frame forms a framework of the shell, and the containment steel plate forms the peripheral protection of the shell.
10. The eddy current particle damper as claimed in claim 1, wherein: the mass block is formed by mixing one or more of steel, lead block, concrete, grouting material and liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922289471.XU CN212053292U (en) | 2019-12-17 | 2019-12-17 | Eddy current particle damper |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922289471.XU CN212053292U (en) | 2019-12-17 | 2019-12-17 | Eddy current particle damper |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863119A (en) * | 2021-09-18 | 2021-12-31 | 湖南省潇振工程科技有限公司 | Electric eddy current tuned mass damper |
| CN114629070A (en) * | 2020-12-11 | 2022-06-14 | 中国电力科学研究院有限公司 | Transmission line breeze vibration control liquid frequency modulation quality eddy current vibration damper |
| CN114753495A (en) * | 2022-03-03 | 2022-07-15 | 上海尤安建筑设计股份有限公司 | Steel reinforced concrete column steel beam node |
-
2019
- 2019-12-17 CN CN201922289471.XU patent/CN212053292U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114629070A (en) * | 2020-12-11 | 2022-06-14 | 中国电力科学研究院有限公司 | Transmission line breeze vibration control liquid frequency modulation quality eddy current vibration damper |
| CN114629070B (en) * | 2020-12-11 | 2023-09-08 | 中国电力科学研究院有限公司 | Electric transmission wire breeze vibration control liquid frequency modulation quality eddy current vibration damper |
| CN113863119A (en) * | 2021-09-18 | 2021-12-31 | 湖南省潇振工程科技有限公司 | Electric eddy current tuned mass damper |
| CN113863119B (en) * | 2021-09-18 | 2023-02-24 | 湖南省潇振工程科技有限公司 | Electric eddy current tuned mass damper |
| CN114753495A (en) * | 2022-03-03 | 2022-07-15 | 上海尤安建筑设计股份有限公司 | Steel reinforced concrete column steel beam node |
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