CN212453170U - Bidirectional eddy current nonlinear energy trap vibration damper - Google Patents

Abstract

The utility model relates to the technical field of structural engineering vibration control, and discloses a bidirectional eddy current nonlinear energy trap vibration damper, which comprises an inner bottom plate, an inner top plate, a first inner supporting plate, a mass block, a first eddy current component and a second eddy current component; the inner bottom plate is arranged in a sliding mode in the X direction, the two first inner supporting plates are oppositely arranged on the inner bottom plate in the Y direction, the inner top plate is buckled at the top ends of the two first inner supporting plates, the mass block is arranged between the two first inner supporting plates in the Y direction in a sliding mode, the first eddy current component is arranged between the mass block and the inner bottom plate and used for dissipating structural vibration energy in the Y direction, and the second eddy current component is arranged above the inner top plate and used for dissipating structural vibration energy in the X direction. The beneficial effects are that: the eddy current is used as damping, so that the structure does not need to be in direct contact with a building structure, does not have any friction damping, does not need later maintenance, is not influenced by temperature, has good durability, and can effectively inhibit the vibration of the structure.

Description

Bidirectional eddy current nonlinear energy trap vibration damper

Technical Field

The utility model relates to a structural engineering vibration control technical field, concretely relates to two-way eddy current nonlinear energy trap damping device.

Background

Civil engineering structures are prone to generate large-scale vibration under the action of external stimuli such as earthquakes, strong winds and the like, and domestic and foreign scholars conduct extensive research to reduce or inhibit response caused by the structures, and propose a plurality of structure control technologies, and Tuned Mass Dampers (TMD) are widely applied to building structures. When the original structure is excited by the outside, the mass block of the TMD provides reverse acting force for the structure due to inertia, and energy is consumed through damping, so that the vibration reaction of the structure is reduced. However, the conventional TMD is sensitive to frequency influence, and has the defects of sensitive vibration reduction frequency band, limited energy consumption capability, high price of a damper and the like. Compared with the conventional TMD, the nonlinear energy trap (NES) has no fixed frequency, so that it can resonate with the main body structure in a wider frequency range and dissipate more quickly through the damping element, and is a research direction with great development prospect.

Although the nonlinear energy trap has the advantages of broadband and the like, the viscous damper is adopted as an energy consumption element, the service life is short, the oil leakage condition exists, the maintenance is not facilitated, and in addition, the additional rigidity of the viscous damper can also influence the frequency parameter of the device and is not beneficial to parameter design.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of above prior art existence, provide a two-way eddy current nonlinear energy well vibration damper based on cubic rigidity, possess advantages such as wide band, robustness is strong to utilize the eddy current as the damping, the damping need not with building structure direct contact, no any friction damping does not need the later maintenance, does not receive the temperature influence, and the durability is good, can restrain the vibration of structure effectively.

The purpose of the utility model is realized through the following technical scheme: a vibration damper for a bidirectional eddy current nonlinear energy trap comprises an inner bottom plate, an inner top plate, a first inner supporting plate, a mass block, a first eddy current component and a second eddy current component; the inner bottom plate is arranged in a sliding mode in the X direction, the two first inner supporting plates are oppositely arranged on the inner bottom plate in the Y direction, the inner top plate is buckled at the top ends of the two first inner supporting plates, the mass block is arranged between the two first inner supporting plates in the Y direction in a sliding mode, the first eddy current component is arranged between the mass block and the inner bottom plate and used for dissipating structural vibration energy in the Y direction, and the second eddy current component is arranged above the inner top plate and used for dissipating structural vibration energy in the X direction.

Further, the first eddy current component comprises a first copper plate and a plurality of first permanent magnets; the first copper plate is fixedly installed on the upper surface of the inner bottom plate, the first permanent magnets are uniformly fixed on the lower surface of the mass block, and intervals are formed between the first permanent magnets and the first copper plate.

Further, the device also comprises a first traction assembly; the first traction assembly comprises an X-direction linear spring and a second inner support plate; the two second inner supporting plates are oppositely arranged on the inner bottom plate along the X direction, the top ends of the two second inner supporting plates are connected with the inner top plate, the X-direction linear springs are respectively positioned on two sides of the mass block along the X direction, one end of each X-direction linear spring is connected with the mass block, and the other end of each X-direction linear spring is connected with the corresponding second inner supporting plate.

Further, the second eddy current component comprises a second copper plate and a plurality of second permanent magnets; the second permanent magnets are uniformly arranged on the upper surface of the inner top plate, the second copper plate is fixed above the second permanent magnets, and intervals are arranged between the second permanent magnets and the second copper plate.

Further, a second traction assembly is also included; the second traction assembly comprises Y-direction linear springs and first outer support plates, the two first outer support plates are oppositely arranged along the Y direction and are respectively fixed on the outer sides of the two first inner support plates, the Y-direction linear springs are arranged between the first outer support plates and the first inner support plates, and two ends of the Y-direction linear springs are respectively connected with the first outer support plates and the first inner support plates.

Further, the device also comprises a Y-direction sliding assembly; the Y-direction sliding assembly comprises a guide rod and a lifting ring; two ends of the guide rod are respectively connected with the two first inner supporting plates, the hanging rings are slidably mounted on the guide rod, and the mass block is connected with the hanging rings.

Further, the device also comprises an X-direction sliding assembly; the X-direction sliding assembly comprises an outer bottom plate and a guide rail; the guide rail is installed in the outer bottom plate along the X direction, the inner bottom plate is provided with a sliding groove, and the inner bottom plate is installed on the guide rail in a sliding mode through the sliding groove.

The guide rail structure further comprises a protective casing, wherein the protective casing comprises an outer top plate and second outer support plates, the two second outer support plates are fixedly arranged on the outer bottom plate and are respectively positioned at two ends of the guide rail, the second outer support plate is higher than the first inner support plate, and the outer top plate is buckled at the top end of the second outer support plate.

Compared with the prior art, the utility model have following advantage:

1. the utility model provides a two-way eddy current nonlinear energy trap damping device, through setting up can cooperate with first eddy current subassembly along the gliding quality piece of Y direction to and cooperate with second eddy current subassembly along the gliding core part including the quality piece of X direction, combine the structure of cubic rigidity nonlinear energy trap, can effectively deal with complicated external excitation, realize X, Y two-way damping; the first eddy current component and the second eddy current component do not need to be in direct contact, and no friction damping exists; compared with a common damper, the damper does not need later maintenance, is not influenced by temperature and has good durability; the eddy current damper only has eddy current damping force and no additional rigidity, and the parameter design of the device cannot be influenced; the installation is relatively simple, and external energy supply is not needed;

2. the utility model discloses in, pull the subassembly through setting up first subassembly and second, wherein X is perpendicular to linear spring and Y to its direction that sets up of linear spring and displacement direction, make this device X, Y to forming nonlinear stiffness respectively, have unsteady natural frequency, consequently this device can take place resonance with building structure in the more extensive frequency range of two directions, the energy homoenergetic of building structure two directions transmits to this device rapidly, and dissipate through two sets of eddy current components, thereby reduce the response of two directions of building structure. Therefore, the device has the characteristic of wide vibration damping frequency band, and in addition, the device can not cause the rapid reduction of vibration damping performance due to rigidity degradation, and has the advantages of strong robustness and the like compared with a linear vibration damping damper.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

figure 1 shows an exploded schematic view of a bi-directional eddy current nonlinear energy trap damping device according to the present invention;

FIG. 2 shows the assembled structure of FIG. 1;

fig. 3 shows a schematic structural view of a core part according to the present invention;

fig. 4 shows a cut-away view of a damping device according to the invention;

FIG. 5 shows a top view of FIG. 4;

in the figure, 1 is an inner bottom plate; 2 is an inner top plate; 3 is a first inner support plate; 4 is a mass block; 5 is a first copper plate; 6 is a first permanent magnet; 7 is an X-direction linear spring; 8 is a second inner support plate; 9 is a second copper plate; 10 is a second permanent magnet; 11 is a Y-direction linear spring; 12 is a first outer support plate; 13 is a guide rod; 14 is a hanging ring; 15 is an outer bottom plate; 16 is a guide rail; 17 is an outer top plate; 18 is a second outer support plate; and 19 is a chute.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

The bidirectional eddy current nonlinear energy trap vibration damper shown in fig. 1-5 comprises an inner bottom plate 1, an inner top plate 2, a first inner support plate 3, a mass block 4, a first eddy current component and a second eddy current component; the inner bottom plate 1 is arranged in a sliding mode along the X direction, the two first inner supporting plates 2 are oppositely arranged on the inner bottom plate 1 along the Y direction, the inner top plate 2 is buckled at the top ends of the two first inner supporting plates 3, the mass block 4 is arranged between the two first inner supporting plates 3 in the Y direction in a sliding mode, the first eddy current component is arranged between the mass block 4 and the inner bottom plate 1 and used for dissipating structural vibration energy in the Y direction, and the second eddy current component is arranged above the inner top plate 2 and used for dissipating structural vibration energy in the X direction.

The mass block 4 is located in the area enclosed by the two first inner support plates 3, the inner bottom plate 1 and the inner top plate 2 and can slide along the Y direction in a reciprocating manner, when the mass block 4 slides along the Y direction in a reciprocating manner, the first eddy current component generates eddy current damping force, the damping force does work in a reciprocating manner, and the generated heat is transferred to the outside through heat conduction, so that the vibration energy of the Y direction of the building structure is effectively dissipated. Interior bottom plate 1 can follow X to the reciprocating sliding, and roof 2, first interior backup pad 3 follow X to the reciprocating sliding in synchronous drive when interior bottom plate 1 slides, and second eddy current component produces the eddy current damping force, and the reciprocal power of doing of damping force, the heat of production pass through heat-conduction transmission to the external world to effective dissipation building structure X is to the vibration energy.

The first eddy current component comprises a first copper plate 5 and a plurality of first permanent magnets 6; the first copper plate 5 is fixedly arranged on the upper surface of the inner bottom plate 1, the first permanent magnets 6 are uniformly fixed on the lower surface of the mass block, and a gap is formed between each first permanent magnet 6 and the corresponding first copper plate 5. First permanent magnet adopts a plurality of pieces, through reasonable arranging, under the circumstances of guaranteeing magnetic field intensity, can let the magnetic field between first permanent magnet 6 and the first copper 5 more be close even high-intensity magnetic field, is favorable to controlling the eddy current damping force size.

Also includes a first traction assembly; the first traction assembly comprises an X-direction linear spring 7 and a second inner support plate 8; two second inner supporting plates 8 are relatively and fixedly arranged on the inner bottom plate along the X direction, the top ends of the two second inner supporting plates 8 are connected with the inner top plate 2, the X-direction linear springs 7 are respectively positioned on two sides of the mass block 4 along the X direction, one end of each X-direction linear spring 7 is connected with the mass block 4, and the other end of each X-direction linear spring is connected with the corresponding second inner supporting plate 8. The second inner support plates 8 and the first inner support plates 3 are equal in height, but no connection relation exists between the second inner support plates 8 and the first inner support plates 3, and the arrangement can enable a space to be reserved between every two adjacent second inner support plates 8 and the first inner support plates 3, so that heat dissipation is facilitated. The X-direction linear spring 7 provides a Y-direction nonlinear restoring force for the mass block 4 which slides back and forth along the Y direction, so that the mass block 4 moving along the Y direction has inconstant natural vibration frequency, can resonate with a building structure in a wider frequency range of the Y direction, and enables the energy of the building structure in the Y direction to be rapidly transmitted to the mass block 4 and to be consumed through the first eddy current set, thereby reducing the corresponding Y direction of the building structure.

The second eddy current component comprises a second copper plate 9 and a plurality of second permanent magnets 10; the second permanent magnets 10 are uniformly arranged on the upper surface of the inner top plate 2, the second copper plate 9 is fixed above the second permanent magnets 10, and intervals are formed between the second permanent magnets 10 and the second copper plate 5. In the device, a plurality of second permanent magnets 10 which are uniformly distributed are adopted, rather than a whole magnet. The benefits of this arrangement are: through reasonable arrangement, under the condition of ensuring the intensity of the magnetic field, the magnetic field between the second permanent magnet 10 and the second copper plate 9 can be closer to a uniform magnetic field, and the eddy current damping force can be favorably controlled.

The inner bottom plate 1, the inner top plate 2, the mass block 4, the first inner support plate 3, the second inner support plate 8, the first eddy current component and the second eddy current component form a core part in the vibration damping device, and the core part can slide along the X direction under the action of the inner bottom plate 1, so that the second permanent magnet 10 and the second copper plate 9 generate relative displacement and generate eddy current damping force.

The device also comprises a second traction assembly; the second traction assembly comprises a Y-direction linear spring 11 and a first outer support plate 12, the two first outer support plates 12 are oppositely arranged along the Y direction and are respectively fixed at the outer sides of the two first inner support plates 3, the Y-direction linear spring 11 is arranged between the first outer support plate 12 and the first inner support plate 3, and two ends of the Y-direction linear spring 11 are respectively connected with the first outer support plate 12 and the first inner support plate 3. The height of the first outer support plate 12 is higher than that of the first inner support plate 3, the bottom end of the first outer support plate 12 is fixedly arranged on the outer bottom plate 15, and the top end of the first outer support plate 12 is fixedly arranged on the outer top plate 17. This setting can provide the space for the setting of second eddy current component, can also improve the radiating effect. The Y-direction linear spring 11 provides a nonlinear restoring force in the X direction for the core part sliding along the guide rail 16, so that the core part moving in the X direction has a non-constant natural vibration frequency, can resonate with the building structure in a wider frequency range in the X direction, and enables the energy in the X direction of the building structure to be rapidly transmitted to the core part and consumed through the second eddy current component, thereby reducing the response in the X direction of the building structure.

The Y-direction sliding assembly is further included; the Y-direction sliding assembly comprises a guide rod 13 and a lifting ring 14; two ends of the guide rod 13 are respectively connected with the two first inner support plates 3, the hanging rings 14 are slidably mounted on the guide rod 13, and the mass block 4 is connected with the hanging rings 14. The mass block 4 is integrally connected with the hanging ring 14, and the stability of the mass block 4 sliding along the Y direction can be improved by arranging the guide rod 13 and the hanging ring 14.

The device also comprises an X-direction sliding assembly; the X-direction sliding assembly comprises an outer bottom plate 15 and a guide rail 16; the guide rail 16 is installed on the outer bottom plate 15 along the X direction, the inner bottom plate 1 is provided with a sliding groove 19, and the inner bottom plate 1 is slidably installed on the guide rail 16 through the sliding groove 19. By providing the guide rails 16, the stability of the core in the X-direction can be improved.

The protection device further comprises a protection shell, the protection shell comprises an outer top plate 17 and second outer support plates 18, the two second outer support plates 18 are fixedly installed on the outer bottom plate 15 and are respectively located at two ends of the guide rail 16, the first outer support plates 12 and the second outer support plates 18 are equal in height, the first inner support plates 3 and the second inner support plates 8 are equal in height, the two outer support plates are higher than the two inner support plates to provide installation space for the second eddy current component, and the second copper plate 9 is fixed on the lower surface of the outer top plate 17. The two first outer support plates are fixedly arranged on the outer bottom plate, and the outer top plate is buckled at the top ends of the first outer support plate 12 and the second outer support plate 18. The adjacent two first outer support plates 12 and the second outer support plates 18 have a spacing for heat dissipation.

In this embodiment, as shown in fig. 1, the inner bottom plate is in a cross shape and has four outward extending ends, two first inner support plates and two second inner support plates are correspondingly installed at the four extending ends, the inner top plate is fastened to the top ends of the two first inner support plates and the two second inner support plates, and a space is formed between every two adjacent inner support plates, so that heat dissipation is facilitated. The inner bottom plate is arranged on the outer bottom plate in a sliding mode through the guide rail, the two first outer supporting plates and the two second outer supporting plates are arranged on the outer bottom plate and are opposite to the corresponding inner supporting plates, a space is formed between every two adjacent outer supporting plates, heat dissipation is facilitated, and the outer top plate is buckled at the top ends of the two first outer supporting plates and the two second outer supporting plates. The X-direction linear spring is arranged between the mass block and the second inner supporting plate, the Y-direction linear spring is arranged between the first inner supporting plate and the second inner supporting plate, when X, Y-direction reciprocating sliding occurs in the device when the building structure vibrates, the arrangement of the X-direction linear spring and the Y-direction linear spring enables the device to form nonlinear stiffness in the X, Y direction respectively, so that the device has non-constant natural vibration frequency in two directions, therefore, the device can resonate with the building structure in a wider frequency range in two directions, so that the energy in two directions of the building structure can be rapidly transmitted to the device and consumed through the two groups of eddy current components, therefore, the response of the building structure in two directions is reduced, in addition, the damping performance cannot be rapidly reduced due to rigidity degradation, and the linear damping damper has the advantages of strong robustness and the like.

In the specific implementation:

the outer bottom plate 15 in the device can be fixed on a floor slab of a building structure through bolts or other forms, when the building structure vibrates in the Y direction, the mass block does reciprocating motion in the Y direction, and because the X direction linear spring provides the nonlinear restoring force in the Y direction, the mass block can resonate with the building structure in the Y direction in a wider frequency range, so that the energy in the Y direction of the building structure is rapidly transmitted to the device, and the damping force of the first eddy current component does work to dissipate, thereby effectively inhibiting the vibration of the Y direction structure. When the structure vibrates in the X direction, the core part including the mass block does reciprocating motion in the X direction, and the Y-direction linear spring provides nonlinear restoring force in the X direction, so that the core part can resonate with the building structure in the X direction in wider frequency, the energy in the X direction of the building structure is quickly transferred to the device, the second eddy current component damping force does work to dissipate, and the vibration of the X-direction structure is effectively inhibited.

The above-mentioned specific implementation is the preferred embodiment of the present invention, can not be right the utility model discloses the limit, any other does not deviate from the technical scheme of the utility model and the change or other equivalent replacement modes of doing all contain within the scope of protection of the utility model.

Claims (8)

1. The utility model provides a two-way electric eddy current nonlinear energy trap damping device which characterized in that: the device comprises an inner bottom plate, an inner top plate, a first inner supporting plate, a mass block, a first eddy current component and a second eddy current component; the inner bottom plate is arranged in a sliding mode in the X direction, the two first inner supporting plates are oppositely arranged on the inner bottom plate in the Y direction, the inner top plate is buckled at the top ends of the two first inner supporting plates, the mass block is arranged between the two first inner supporting plates in the Y direction in a sliding mode, the first eddy current component is arranged between the mass block and the inner bottom plate and used for dissipating structural vibration energy in the Y direction, and the second eddy current component is arranged above the inner top plate and used for dissipating structural vibration energy in the X direction.

2. The bi-directional eddy current nonlinear energy trap damping device of claim 1, wherein: the first eddy current component comprises a first copper plate and a plurality of first permanent magnets; the first copper plate is fixedly installed on the upper surface of the inner bottom plate, the first permanent magnets are uniformly fixed on the lower surface of the mass block, and intervals are formed between the first permanent magnets and the first copper plate.

3. The bi-directional eddy current nonlinear energy trap damping device of claim 1, wherein: also includes a first traction assembly; the first traction assembly comprises an X-direction linear spring and a second inner support plate; the two second inner supporting plates are oppositely arranged on the inner bottom plate along the X direction, the top ends of the two second inner supporting plates are connected with the inner top plate, the X-direction linear springs are respectively positioned on two sides of the mass block along the X direction, one end of each X-direction linear spring is connected with the mass block, and the other end of each X-direction linear spring is connected with the corresponding second inner supporting plate.

4. The bi-directional eddy current nonlinear energy trap damping device of claim 1, wherein: the second eddy current component comprises a second copper plate and a plurality of second permanent magnets; the second permanent magnets are uniformly arranged on the upper surface of the inner top plate, the second copper plate is fixed above the second permanent magnets, and intervals are arranged between the second permanent magnets and the second copper plate.

5. The bi-directional eddy current nonlinear energy trap damping device of claim 1, wherein: the device also comprises a second traction assembly; the second traction assembly comprises Y-direction linear springs and first outer support plates, the two first outer support plates are oppositely arranged along the Y direction and are respectively fixed on the outer sides of the two first inner support plates, the Y-direction linear springs are arranged between the first outer support plates and the first inner support plates, and two ends of the Y-direction linear springs are respectively connected with the first outer support plates and the first inner support plates.

6. The bi-directional eddy current nonlinear energy trap damping device of claim 1, wherein: the Y-direction sliding assembly is further included; the Y-direction sliding assembly comprises a guide rod and a lifting ring; two ends of the guide rod are respectively connected with the two first inner supporting plates, the hanging rings are slidably mounted on the guide rod, and the mass block is connected with the hanging rings.

7. The bi-directional eddy current nonlinear energy trap damping device of claim 1, wherein: the device also comprises an X-direction sliding assembly; the X-direction sliding assembly comprises an outer bottom plate and a guide rail; the guide rail is installed in the outer bottom plate along the X direction, the inner bottom plate is provided with a sliding groove, and the inner bottom plate is installed on the guide rail in a sliding mode through the sliding groove.

8. The bi-directional eddy current nonlinear energy trap damping device of claim 7, wherein: the guide rail structure is characterized by further comprising a protective casing, wherein the protective casing comprises an outer top plate and second outer supporting plates, the two second outer supporting plates are fixedly arranged on the outer bottom plate and are respectively located at two ends of the guide rail, the second outer supporting plates are higher than the first inner supporting plates, and the outer top plate is buckled at the top ends of the second outer supporting plates.

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