CN112814187A - Tuned particle mass damping device based on suspension - Google Patents
Tuned particle mass damping device based on suspension Download PDFInfo
- Publication number
- CN112814187A CN112814187A CN202011640411.9A CN202011640411A CN112814187A CN 112814187 A CN112814187 A CN 112814187A CN 202011640411 A CN202011640411 A CN 202011640411A CN 112814187 A CN112814187 A CN 112814187A
- Authority
- CN
- China
- Prior art keywords
- mass
- damping
- suspension
- damper
- particle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000013016 damping Methods 0.000 title claims abstract description 153
- 239000002245 particle Substances 0.000 title claims abstract description 80
- 239000000725 suspension Substances 0.000 title claims abstract description 49
- 239000003190 viscoelastic substance Substances 0.000 claims abstract description 14
- 239000004020 conductor Substances 0.000 claims description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 30
- 229910052742 iron Inorganic materials 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000004567 concrete Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 12
- 238000005265 energy consumption Methods 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 7
- 230000007246 mechanism Effects 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000005192 partition Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 7
- 230000009467 reduction Effects 0.000 description 6
- 230000004044 response Effects 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
Abstract
The invention discloses a tuned particle mass damping device based on suspension, and relates to the technical field of damping vibration attenuation. The tuned particle mass damping device comprises a mass system, a rigidity system and a damping system which are arranged in a shell; the mass system includes at least a particulate mass; the rigidity system is a suspension rod or a suspension rope, and the quality system can swing in the shell by taking the suspension rod or the suspension rope as a swing rod or a swing rope; the damping system comprises a damper and a collision damping support, the collision damping support is arranged on the swing stroke of the mass system and can horizontally limit the swing of the mass system, the collision damping support comprises a support and a viscoelastic material layer, and the viscoelastic material layer is arranged on the inner side of the support and vertically arranged in the shell to receive the collision of the mass system. The hybrid vibration damping mechanism has the advantages of good vibration damping and energy consumption effects, wide vibration damping frequency band, good sensitivity, realization of frequency continuity adjustment and convenience and simplicity in adjustment.
Description
Technical Field
The invention relates to the technical field of damping vibration attenuation, in particular to a tuned particle mass damping device based on suspension.
Background
Tuned Mass Damper (TMD) is a common damping device, which is a device that adds an inertial Mass to a top or upper part of a tower and is connected to a main structure (tower) with a spring and a Damper. The vibration frequency of the tuned mass damper is close to the frequency of the main structure, the control strategy is to apply the vibration mode resonance of the sub-structure and the main structure to achieve the purpose of dynamic vibration absorption, and the application of the damping structure continuously consumes the energy of the main structure and the sub-structure to reduce the dynamic response of the main structure. The tuned mass damping device is generally divided into three major parts of a rigidity system, a mass system and a damping system from the component composition, and the three parts can form different types of damping devices through different combination modes: the rigidity system has more types, the mass system can be divided into a solid type and a liquid type, and the damping system can be divided into a rod type damper, a damping box and an eddy current damper. However, the damping frequency band of existing TMDs is narrow, the energy dissipation capability is limited, and it often requires a large space to match the motion of the mass system. Taking a suspended tuned mass damper as an example, the suspended tuned mass damper has the characteristics of small change to the original structure, simple installation, remarkable damping effect and low manufacturing cost as a damping measure, however, the suspended tuned mass damper of the existing tower mast structure is usually installed indoors, and considering that the swing cycle of the tower mast structure is usually long, a long swing length needs to be set, and a large indoor space needs to be occupied during installation.
The particle damper technology is a novel damper applied to the field of civil engineering vibration control in recent years, and has the advantages of small change to an original system, small additional mass, wide vibration damping frequency band, good multi-dimensional control capability and the like as a tuned mass and energy consumption vibration damping control technology. However, in the particle damper, the collisions between particles and cavities after the damping particles start to vibrate are mostly elastic collisions, and the energy dissipation capability of the collision structure is limited.
Therefore, it is desirable to provide a suspension type tuned particle damper which can overcome the defects of too narrow damping frequency band of TMD, unstable effect of the particle damper, strong energy consumption capability and higher space utilization rate.
Disclosure of Invention
The invention aims to: overcomes the defects of the prior art and provides a tuning particle mass damping device based on suspension. The present invention suspends the mass system directly on the sling/boom and takes advantage of the combined benefits of the particle damper and tuned mass damper, while the crash damping mount forms the crash damping as part of the damping system. The hybrid energy consumption mechanism not only strengthens the vibration reduction and energy consumption effect and increases the vibration reduction frequency band, but also utilizes the space to the maximum extent, can react in time when in small vibration, has good sensitivity, can also realize the continuous adjustment of frequency, and has simple, convenient and effective adjustment mode.
In order to achieve the above object, the present invention provides the following technical solutions:
a suspension-based tuned particle mass damping device comprising a housing, and a mass system, a stiffness system and a damping system disposed in the housing;
the mass system at least comprises a particle mass block, the particle mass block comprises a cavity formed by a 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;
the rigidity system is a suspension rod or a suspension rope, and the suspension rod or the suspension rope is used as a suspension structure of the mass system to install the mass block in the shell, so that the mass system can swing in the shell by taking the suspension rod or the suspension rope as a swing rod or a swing rope;
the damping system comprises a damper and a collision damping bracket; one end of the damper is connected to the shell, the other end of the damper is connected to the mass system, and the damper generates damping force when the mass system swings; the collision damping support is arranged on the swing stroke of the mass system and can horizontally limit the swing of the mass system, the collision damping support comprises a support and a viscoelastic material layer, and the viscoelastic material layer is arranged on the inner side of the support and is vertically arranged in the shell to receive the collision of the mass system.
Further, the mass system also comprises a fixed mass block, the particle mass block is fixedly arranged at the upper part and/or the lower part of the fixed mass block, and the weight ratio of the weight of the particle mass block to the total weight of the mass system is 5-90%.
Further, the weight ratio of the weight of the particle mass to the total weight of the mass system is 20% -30%, and the installation position of the collision damping support is located at 1/4-1/2 positions of the swing stroke of the mass system.
Further, the horizontal distance between the collision damping support and the mass system is 20-100mm, and the thickness of the viscoelastic material layer is 3-10 mm.
Further, a partition plate is arranged in a cavity formed by the shell of the particle mass block 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 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.
Further, the damper is one or more rod-type dampers, the rod-type dampers are horizontally arranged around the mass block, and the rod-type dampers are symmetrically or asymmetrically arranged around the mass block.
Further, the damper is a damping box, the damping box comprises a box body filled with a viscous body and one or more upper components inserted into the viscous body, the box body or the upper components are installed on the mass system, and the box body or the upper components are driven to move when the mass system swings, so that the upper components are driven to move in the viscous body in the box body to generate damping force.
Further, the damper is an eddy current damper, the eddy current damper comprises a permanent magnet, a magnet back iron, a conductor plate and a conductor back iron, the permanent magnet is located between the magnet back iron and the conductor plate, one of the permanent magnet and the conductor plate is installed on the mass system, the other one of the permanent magnet and the conductor plate is installed on the shell, the conductor plate and the permanent magnet move relatively when the mass system swings, the conductor plate cuts magnetic lines of force to generate eddy current, the eddy current interacts with the permanent magnet, and damping force for blocking the relative movement is generated.
Further, the suspension rod or the suspension rope adopts one or more of a metal material component, a plastic material component and a composite material component; the fixed mass block is formed by mixing one or more of steel, lead block, concrete, grouting material and liquid.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects as examples:
1) the mass system is directly suspended on the sling/suspender, does not need initial starting force in the working state, can timely react when in small vibration, has good sensitivity, and provides an extremely low lower limit value for the damping device.
2) The advantages of the particle damper and the tuned mass damper are mixed, particle groups in the particle mass block are rubbed and collided with the inside of the shell, the partition plates and the particle groups, vibration energy is consumed greatly, and structural response caused by external excitation can be effectively reduced. Meanwhile, the collision damping support is used as a part of the damping system to form collision damping, and the viscoelastic material on the collision prevention support consumes energy through collision with the whole mass system, so that structural response is reduced. The hybrid energy consumption mechanism strengthens the vibration reduction energy consumption effect and increases the vibration reduction frequency band.
3) The arrangement of the collision damping support enables the structure of the whole damping device to be more compact, and the space utilization rate is remarkably improved.
4) The stiffness and frequency of the damping device can be continuously adjusted. The swing length (namely the distance between the center of the mass block and the lifting point) can be adjusted through the limiting structure to continuously adjust the rigidity and the frequency, so that the frequency is continuously adjusted, and the adjusting mode is convenient, simple and effective. Meanwhile, the size of the mass block is not required to be changed when the frequency is adjusted, so that the vibration reduction effect is ensured.
Drawings
Fig. 1 is a first schematic structural diagram of a suspension-based tuned particle mass damping device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a suspension-based tuned particle mass damping device according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram three of a suspension-based tuned particle mass damping device according to an embodiment of the present invention.
Fig. 4 is a structural schematic diagram of a suspension-based tuned particle mass damping device according to an embodiment of the present invention.
Fig. 5 is a schematic view of the installation of the damping device provided by the embodiment of the invention on a building.
Fig. 6 is a schematic structural diagram of a mass system according to an embodiment of the present invention.
Fig. 7 is a schematic view of an installation position of the impact damping bracket according to the embodiment of the present invention.
Fig. 8 is a schematic structural view of a crash damping support according to an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a single-rod damper according to an embodiment of the present invention.
Fig. 10 is a schematic structural view of a multi-vertical-rod damping box according to an embodiment of the present invention.
Fig. 11 is a schematic diagram of an eddy current damper according to an embodiment of the present invention.
Fig. 12 is a plan view of a crash damping brace provided in accordance with an embodiment of the present invention.
Description of reference numerals:
a damping device 100;
a housing 110;
a mass system 120, a particle mass block 121, a shell 121a, a cavity 121b, a particle group 121c, a partition plate 121d, and a fixed mass block 122;
a boom or sling 130;
a damper 150;
a rod damper 150a, a cylinder 151a, a piston rod 152a, a throttle hole 153a, a cover 154a, a viscous body 155a, a closed space 158 a;
an eddy current damper 150c, a permanent magnet 151c, a magnet back iron 152c, a conductor plate 153c, a conductor back iron 154 c;
a mounting bracket 170;
a communication tower 200;
the platform 210 is installed.
Detailed Description
The tuning particle mass damping device based on suspension disclosed by the invention is further explained in detail by combining the attached drawings and the specific embodiment. 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, proportions, sizes, and other dimensions shown in the drawings and described in the specification are only for the purpose of understanding and reading the present disclosure, and are not intended to limit the scope of the invention, which is defined by the claims, and any modifications of the structures, changes in the proportions and adjustments of the sizes and other dimensions, should be construed as falling within the scope of the invention unless the function and objectives of the invention are affected. The scope of the preferred embodiments of the present invention includes additional implementations in which functions may be executed out of order from that 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
A suspension-based tuned particle mass damping device includes a housing, and a mass system, a stiffness system, and a damping system disposed in the housing.
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.
The mass system includes at least a particle mass block including a cavity formed by a shell, a particle cluster filled in the cavity, and vibration energy dissipated by friction and/or collision between the particle clusters themselves and between the particle cluster and the shell.
The stiffness system is a boom or sling which is used as a suspension structure of the mass system to mount the mass block in the housing, so that the mass system can swing in the housing with the boom or sling as a swing link or swing rope. The damping frequency can be adjusted by adjusting the mounting height of the mass system on the boom or sling.
In this embodiment, the suspension rod or suspension cable may be made of metal material, such as steel, copper, aluminum, etc., or made of composite material, such as carbon fiber cable or rod, glass fiber rod, etc., or made of plastic material. When the device is arranged, the device can be a single suspender/sling or a plurality of suspenders/slings, and the device can be arranged by a person skilled in the art according to the actual needs of engineering.
The damping system includes a damper and a crash damping mount.
One end of the damper is connected to the shell, the other end of the damper is connected to the mass system, and the damper generates damping force when the mass system swings. In this embodiment, the damper may be a rod damper, a damping box or an eddy current damper, and is typically installed as shown in fig. 1 to 4.
The collision damping support is arranged on the swing stroke of the mass system and can horizontally limit the swing of the mass system. The crash damping mount includes a mount and a layer of viscoelastic material mounted inside the mount and vertically disposed in the housing to receive a crash of the mass system.
The impact damping mount, as part of a damping system, can provide energy dissipation for the system. In this embodiment, the impact damping bracket 160 may be directly mounted on the housing 110, for example, the bottom of the impact damping bracket 160 is fixedly mounted on the bottom plate of the housing 110 in fig. 1; the mounting may also be performed by a separate mounting bracket 170, such as the impact damping bracket 160 fixedly mounted to the side wall of the outer shell 110 by a lateral mounting bracket 170 in fig. 2.
When the damping device 100 is used, the damping device 100 is installed on a building structure, and when the main structure is subjected to external dynamic action, along with the increase of the response of the main structure, the damping device 100 firstly applies larger damping force to the main structure, so that a large amount of energy of the structure is consumed, and the vibration of the main structure can be effectively controlled. When the mass system 120 vibrates, the particle groups inside the particle mass block 121 rub and collide with the inside of the shell, the partition plates and the particle groups, so that a large amount of vibration energy can be consumed; meanwhile, the viscoelastic material layer on the anti-collision support 160 consumes energy by colliding with the mass system, so that the structural response is reduced, and the anti-collision support 160 can remarkably shorten the vibration time and vibration stroke of the damping device and dissipate motion energy. In addition, the above structure can adjust the stiffness and frequency of the damping device 100 by adjusting the weight of the particle mass 121 and its weight ratio in the mass system, or by replacing the springs to adjust the stiffness and frequency of the damping device 100, which can be adjusted by those skilled in the art according to actual anti-vibration needs.
Referring to fig. 5, taking the communication tower 200 as an example, for example, by adding one or more damping devices 100 as described above to the communication tower 200, when the main structure of the communication tower 200 is subjected to an external dynamic force (e.g., wind load), the damping devices 100 provide a force with a frequency similar to or equal to the frequency and opposite to the moving direction of the structure, so as to partially or completely cancel the structural response caused by the external excitation. Preferably, the plurality of damping devices 100 are mounted on the tower 200 in a centrally symmetric fashion via a mounting platform 210.
With continued reference to FIG. 1, in one embodiment, a damping device 100 employing a rod damper is illustrated.
The rod-type dampers can be one or more, the rod-type dampers are horizontally arranged around the mass block, and the rod-type dampers can be symmetrically or asymmetrically arranged around the mass block. Preferably, the plurality of rod dampers are arranged in a central symmetry with respect to the mass block. By way of example and not limitation, if the damper 150 includes 3 rod dampers, the 3 rod dampers are disposed at 120 degrees to each other.
The mass system 120 may further include a fixed mass 122, and the aforementioned particle mass 121 is fixedly installed on an upper portion and/or a lower portion of the fixed mass 122. The fixed mass 122 is preferably made of one or more of steel, lead, concrete, grout, and liquid. In the above structure, the stiffness and frequency of the damping device 100 can be adjusted by adjusting the weight and weight ratio of the particle mass 121 and the fixed mass 122.
Referring to fig. 6, the particle mass 121 includes a cavity 121b formed by a shell 121a, the cavity 121b is filled with a particle group 121c, and vibration energy is consumed by friction and/or collision between the particle group 121c itself and between the particle group 121c and the shell 121 a.
Preferably, in this embodiment, one or more partition plates 121d are disposed in the cavity, and the partition plates 121d may partition the cavity 121b into a plurality of sub-cavities, each of which may be filled with the particle group 121c, and the vibration energy is consumed by friction and/or collision between the particle group 121c itself and between the particle group 121c and the housing 121a and the partition plates 121 d. The volume of the population of particles may be 20% to 80%, preferably 20% to 40%, of the volume of the chamber of each subchamber.
The cavity may be a rectangular parallelepiped, or may be in other shapes such as a cylinder, a prism, a curved surface, etc., and the shape of the cavity should not be construed as limiting the present invention. According to the requirement, a buffer material layer and/or a sound absorption material layer can be arranged on the shell and the partition plate.
The population of particles preferably consists of a plurality of spheres of unequal diameter of 1-60 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 above-described particle damper, which should not be construed as limiting the invention.
The weight ratio of the mass of particles 121 to the total weight of the mass system is in the range 5% to 90%. The crash damping mount 160 may be placed anywhere on the vibrational stroke (or slip stroke) of the mass system.
Preferably, the weight ratio of the weight of the particle mass 121 to the total weight of the mass system is 20% to 30%, and the installation position of the impact damping support 160 is located at 1/4 to 1/2 of the vibration stroke of the mass system 120, so that the damping frequency bandwidth and the energy consumption effect of the damping device 100 are superior within the weight ratio and the installation position range, and the space utilization rate is ensured.
Described in connection with fig. 7: if the vibration stroke of the mass system 120 is set to L, the impact damping bracket 160 is installed at the position 1/4-1/2 of the vibration stroke of the mass system 120, i.e., D1/4L-1/2L.
Further, the horizontal distance d between the impact damping support 160 and the mass system 120 is 20-100 mm.
Referring to fig. 8, in the embodiment, in consideration of energy consumption effect caused by collision and manufacturing cost, the thickness t of the viscoelastic material layer 162 preferably ranges from 3 mm to 10 mm. The viscoelastic material layer 162 is mounted by a bracket 161, and the bracket 161 is preferably made of a rigid material, which can provide rigid support when receiving an impact.
The rod-type damper can be a single-rod-type viscous damper, a double-rod-type viscous damper, a friction damper or a viscoelastic damper, and the viscous body is fluid or semi-fluid.
The rod viscous damper is composed of piston, oil cylinder and damping hole, and is a damping device which utilizes the pressure difference between front and back of piston to make oil flow through the damping hole to produce damping force. For example, taking a single-rod viscous damper as an example, the damper may include a piston cylinder, a piston is disposed in the cylinder, the piston divides an inner chamber of the cylinder into a first piston chamber and a second piston chamber, viscous bodies are filled in the two piston chambers respectively as damping media, a piston rod is connected to the piston, and the other end of the piston rod is connected to an ear ring. In view of the sealing performance, a sealing device is further arranged in the cylinder barrel, and for example, the cylinder barrel, the sealing device and the piston rod can be sealed through a sealing ring. The working principle is as follows: when receiving external force, external force can promote piston rod and piston motion in the cylinder, and the piston bulldozes the damping medium of first piston chamber (or second piston chamber), makes the viscous body pass through the damping hole, produces friction damping, and then the dissipation vibration energy that receives.
The viscous body is preferably compressible silicone oil.
Referring to fig. 9, in particular, the rod damper 150a preferably includes a cylinder 151a and a pair of covers 154a, and a viscous body 155a is filled in a closed space 158a surrounded by the cylinder 151a and the covers 154 a. A piston rod 152a may be provided on one end cover 154a or both end covers 154a, and fig. 9 illustrates that a piston rod 152a is provided on the left end cover 154a, which constitutes a single-rod type viscous damper. Of course, if necessary, a double-rod viscous damper may be configured by providing a piston rod at both right and left end covers 154 a.
The piston on the piston rod 152a divides the aforementioned enclosed space 158a into 2 piston chambers, each of which is filled with a viscous body 155 a. During vibration, the piston rod 152a moves to enable the viscous body 155a to pass through the throttling hole or enable the viscous body 155a to perform relative movement in a closed space, and therefore vibration energy is dissipated.
With continued reference to FIG. 3, in another embodiment, a damping apparatus 100 employing a damping tank is illustrated. The damping box comprises a box body filled with a viscous body and one or more upper components inserted into the viscous body, wherein the box body or the upper components are arranged on a mass system, and the mass system drives the box body or the upper components to move when vibrating so as to promote the upper components to move in the viscous body in the box body to generate damping force.
In particular, the damping box may be installed below the fixed mass 122. In this case, the bottom of the damping box is mounted to the housing 110, for example and without limitation, by fasteners such as bolts, clips, and/or adhesives. A receiving chamber for receiving the viscous body is formed through the case. The viscous body is of a fluid or semi-fluid structure. An upper member inserted in the viscous body is provided corresponding to the housing chamber. The lower end of the upper member is inserted into the viscous body and the upper end of the upper member is connected to the bottom of the fixed mass 122. When vibrating, the upper component moves in the viscous body in the box body to generate damping force, so that vibration energy is absorbed, and vibration reaction is reduced.
Preferably, the upper member is a vertical rod, and the vertical rods inserted into the viscous body can be arranged into one or more than one vertical rods according to requirements. In specific implementation, the vertical rod can be made of metal materials, wood materials or composite materials; the total length, the insertion length proportion (the ratio of the length in the viscous body to the total length) and the section form of the vertical rod can be flexibly arranged according to requirements to adjust the damping force.
The top of the box body can be provided with a top cover and can also be collected to be arranged in an open mode. For a multiple-pole damping box structure, it is preferable to provide separate cells in the box 151b for each pole, each pole being inserted into a cell containing viscous body 154 b.
Referring to fig. 10, the receiving chamber 152b formed by the case 151b is divided into 3 cells 156b by a partition plate 155b, each cell 156b is provided with a vertical rod therein, the upper end of the solid is fixed by the housing 110, and the lower end of the vertical rod is inserted into the viscous body 154 b. Under the action of earthquake or wind load, the box body swings along with the mass block, and the vertical rod moves in the viscous body 154b to generate damping force, so that the vibration resistance and energy consumption functions are provided for the structure. The motion of the multiple vertical rods in any direction in the viscous body can generate damping force, and the multidirectional viscous energy dissipation effect of the structure can be realized.
With continued reference to FIG. 4, in another embodiment, a damping apparatus 100 employing an eddy current damper is illustrated.
The eddy current damper may be mounted on the top, side or bottom of the mass system. When the eddy current damper is arranged at the bottom of the mass system, the upper part of the eddy current damper can be connected with the bottom of the fixed mass block, and the corresponding lower part is connected with the shell; when the eddy current damper is disposed on the upper portion of the mass system, it is preferable that a connection point of the boom or the sling and the mass system is disposed on a side portion of the mass system, or a contour of a main structure of the eddy current damper is disposed in a ring shape through which the boom or the sling is connected to the mass system, in consideration of the fact that the boom or the sling is also required to be mounted on the upper portion of the mass system. The motion 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
Specifically, referring to fig. 11, the eddy current damper 150c includes a permanent magnet 151c, a magnet back iron 152c, a conductor plate 153c, and a conductor back iron 154c, and the permanent magnet 151c is located between the magnet back iron 152c and the conductor plate 153 c. One of the permanent magnet 151c and the conductor plate 153c is mounted on the mass, and the other is mounted on the housing. When the vibration is generated, the conductor plate 153c and the permanent magnet 151c move relative to each other, and the conductor plate 153c cuts magnetic lines of force to generate an eddy current, which interacts with the permanent magnet 151c to generate a damping force that resists the relative movement.
In an exemplary embodiment, one side of the conductor back iron 154c may be fixedly mounted to the housing, and the other side opposite to the one side is mounted with the conductor plate 153 c; the magnet back iron 152c is fixedly mounted on the fixed mass 122, and a pair of permanent magnets 152c are mounted on the surface of the magnet back iron 152c at intervals away from the conductor plate 153c (spaced from the conductor plate). The magnetic poles of the permanent magnet pair are reversed, and when the conductor plate 153c and the permanent magnet 151c move relatively, the conductor plate 153c cuts magnetic lines of force to generate an eddy current, and the eddy current interacts with the permanent magnet 151c to generate a damping force for blocking the relative movement. In the above structure, the magnitude of the damping force can be adjusted by adjusting the distance between the permanent magnet on the magnet back iron and the conductor plate.
Referring to fig. 12, a plan view of crash damping mount 160 in housing 110 is illustrated, with crash damping mount 160 positioned between housing 110 and mass system 120. In fig. 12, the collision damping support 160 is provided in a ring shape corresponding to the shapes of the housing and the mass, but those skilled in the art will appreciate that the shape may be provided in other shapes, and should not be construed as limiting the present invention.
In this embodiment, the frequency of the damping device can be adjusted by adjusting the pendulum length (i.e., the distance between the center of the mass and the suspension point) 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.
For a sling/boom structure, taking the sling as an example, the calculation formula of the rigidity k is as follows:
wherein g is the acceleration of gravity; and L is the swing length, namely the distance between the center of the mass block and the lifting point.
By integrating the formulas (1) to (3), the final frequency calculation formula is obtained by calculation as follows
As can be seen from the formula (4), the frequency is related to the pendulum length, i.e., the frequency of the damping device can be adjusted by adjusting the pendulum length, and the continuous adjustment of the frequency can be realized.
In the foregoing description, 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 changes and modifications of the present invention based on the above disclosure will be within the scope of the appended claims.
Claims (10)
1. A suspension-based tuned particle mass damping device comprising a housing, and a mass system, a stiffness system and a damping system disposed in the housing, characterized in that:
the mass system at least comprises a particle mass block, the particle mass block comprises a cavity formed by a 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;
the rigidity system is a suspension rod or a suspension rope, and the suspension rod or the suspension rope is used as a suspension structure of the mass system to install the mass block in the shell, so that the mass system can swing in the shell by taking the suspension rod or the suspension rope as a swing rod or a swing rope;
the damping system comprises a damper and a collision damping bracket; one end of the damper is connected to the shell, the other end of the damper is connected to the mass system, and the damper generates damping force when the mass system swings; the collision damping support is arranged on the swing stroke of the mass system and can horizontally limit the swing of the mass system, the collision damping support comprises a support and a viscoelastic material layer, and the viscoelastic material layer is arranged on the inner side of the support and is vertically arranged in the shell to receive the collision of the mass system.
2. The suspension-based tuned particle mass damping device according to claim 1, wherein: the mass system also comprises a fixed mass block, the particle mass block is fixedly arranged at the upper part and/or the lower part of the fixed mass block, and the weight ratio of the weight of the particle mass block to the total weight of the mass system is 5-90%.
3. The suspension-based tuned particle mass damping device according to claim 2, wherein: the weight ratio of the weight of the particle mass to the total weight of the mass system is 20-30%, and the installation position of the collision damping support is located at 1/4-1/2 of the swinging stroke of the mass system.
4. The suspension-based tuned particle mass damping device according to claim 3, wherein: the horizontal distance between the collision damping support and the mass system is 20-100mm, and the thickness of the viscoelastic material layer is 3-10 mm.
5. The suspension-based tuned particle mass damping device according to any of claims 1-4, wherein: the cavity that the casing of granule quality piece formed is provided with the baffle in order to separate into a plurality of subchambers with the cavity, and the subchamber is filled with the granule crowd, through the friction and/or collision consumption vibration energy between granule crowd and the baffle.
6. The suspension-based tuned particle mass damping device according to claim 5, 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.
7. The suspension-based tuned particle mass damping device according to claim 1, wherein: the damper is one or more rod-type dampers, the rod-type dampers are horizontally arranged around the mass block, and the rod-type dampers are symmetrically or asymmetrically arranged around the mass block.
8. The suspension-based tuned particle mass damping device according to claim 1, wherein: the damper is a damping box, the damping box comprises a box body filled with a viscous body and one or more upper components inserted into the viscous body, the box body or the upper components are arranged on a mass system, and the box body or the upper components are driven to move when the mass system swings, so that the upper components are driven to move in the viscous body in the box body to generate damping force.
9. The suspension-based tuned particle mass damping device according to claim 1, wherein: the damper is an eddy current damper, the eddy current damper comprises a permanent magnet, a magnet back iron, a conductor plate and a conductor back iron, the permanent magnet is located between the magnet back iron and the conductor plate, one of the permanent magnet and the conductor plate is installed on the mass system, the other one of the permanent magnet and the conductor plate is installed on the shell, the conductor plate and the permanent magnet move relatively when the mass system swings, the conductor plate cuts magnetic lines of force to generate eddy current, the eddy current interacts with the permanent magnet, and damping force for blocking the relative movement is generated.
10. The suspension-based tuned particle mass damping device according to claim 1, wherein: the suspension rod or the suspension rope adopts one or more of a metal material component, a plastic material component and a composite material component; the fixed 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 |
|---|---|---|---|
| CN202011640411.9A CN112814187A (en) | 2020-12-31 | 2020-12-31 | Tuned particle mass damping device based on suspension |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011640411.9A CN112814187A (en) | 2020-12-31 | 2020-12-31 | Tuned particle mass damping device based on suspension |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112814187A true CN112814187A (en) | 2021-05-18 |
Family
ID=75858306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011640411.9A Pending CN112814187A (en) | 2020-12-31 | 2020-12-31 | Tuned particle mass damping device based on suspension |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112814187A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114457930A (en) * | 2022-03-03 | 2022-05-10 | 湖南大学 | Self-energy-consumption pendulum type collision dual-tuning mass damper |
-
2020
- 2020-12-31 CN CN202011640411.9A patent/CN112814187A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114457930A (en) * | 2022-03-03 | 2022-05-10 | 湖南大学 | Self-energy-consumption pendulum type collision dual-tuning mass damper |
| CN114457930B (en) * | 2022-03-03 | 2022-11-25 | 湖南大学 | Self-energy-consumption pendulum type collision dual-tuning mass damper |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212053292U (en) | Eddy current particle damper | |
| CN112854506A (en) | Rod type tuned particle mass damping device combined with collision damping | |
| CN112144684B (en) | Electric eddy current type particle inertial volume damper | |
| CN111139730B (en) | Low-frequency vertical tuned mass damper with negative-stiffness nonlinear energy trap | |
| CN110805645B (en) | Flexible supporting electromagnetic quasi-zero stiffness vibration isolation device | |
| CN109826334B (en) | Cylindrical tuned liquid column damper | |
| CN206607944U (en) | Multistage composite type energy-absorbing energy-dissipating vibration absorber | |
| CN107606027B (en) | A kind of non-linear vibration damping device of two-freedom collision | |
| Yao et al. | Damping performance of a novel ferrofluid dynamic vibration absorber | |
| CN112814187A (en) | Tuned particle mass damping device based on suspension | |
| CN112832398A (en) | Box type tuning particle mass damping device combined with collision damping | |
| CN109751352A (en) | A kind of axial displacement scale-up version eddy current damper | |
| CN105672518B (en) | A kind of tuned mass damper for power consumption of being shaken using whirlpool | |
| Pang et al. | A novel energy absorber based on magnetorheological gel | |
| CN111877591A (en) | Box-type tuning particle mass damping device and tower mast structure | |
| CN108547496B (en) | Composite magnetic rheological fluid particle damper | |
| CN109577726B (en) | Variable-rigidity electromagnetic particle damper | |
| CN106639470A (en) | Vibration-attenuation control device for eddy current damper | |
| CN112814188A (en) | Eddy current tuned particle mass damping device combined with collision damping | |
| CN105443649A (en) | High-damp magnesium alloy vibration isolation structure and application thereof | |
| CN209587014U (en) | A kind of axial displacement scale-up version eddy current damper | |
| CN216552498U (en) | Eddy current particle mass damping device based on column member | |
| CN113090702B (en) | Composite damping vibration attenuation device | |
| CN216566654U (en) | Rod type particle mass damping device based on column type component | |
| CN216566653U (en) | Multi-regulation rod type particle mass damping device based on column type member |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210518 |
|
| WD01 | Invention patent application deemed withdrawn after publication |