CN216891940U

CN216891940U - Winding type eddy current tuned mass damper

Info

Publication number: CN216891940U
Application number: CN202123120707.0U
Authority: CN
Inventors: 欧阳郁汀; 张全伍; 施竹珺
Original assignee: Shanghai Rb Vibration Science And Technology Co ltd
Current assignee: Shanghai Rb Vibration Science And Technology Co ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-07-05
Anticipated expiration: 2031-12-07

Abstract

The utility model relates to a winding type eddy current tuned mass damper, which comprises a base, a plurality of pillars symmetrically arranged on the base, a cross beam penetrating through the tops of the pillars, a mass block suspended below the cross beam, a magnet suspended at the bottom of the mass block, and a resistance support fixed on the base and corresponding to the position of the magnet. In the utility model, the winding type eddy current tuned mass damper based on the double damping energy dissipation mechanism of the winding resistor and the damping pad is a great innovation based on the traditional tuned mass damper, and can realize three-dimensional vibration reduction: the mass block vertically vibrates, and the cantilever beam collides with the damping pad, so that damping energy consumption is realized; the mass block vibrates transversely, and relative motion occurs between the coil resistor and the magnet, so that eddy current damping energy consumption is realized. In addition, the frequency of the damper can be adjusted by changing the rigidity of the beam, the length of the suspension rod or the size of the mass block, and the damping parameters of the damper can be accurately adjusted by increasing or decreasing the number of coil turns.

Description

Winding type eddy current tuned mass damper

Technical Field

The utility model relates to the technical field of civil engineering structure control, in particular to a winding type eddy current tuned mass damper.

Background

Tuned mass dampers are widely used in the civil and mechanical fields to control low frequency vibrations of structures. For example, a pedestrian bridge is easy to generate vertical resonance to cause discomfort to pedestrians because the structural system is flexible and is under the dynamic excitation of pedestrian walking, and the natural vibration frequency is generally close to the walking frequency of the pedestrian walking, about 2-3 Hz. In order to control the vibration of the bridge under wind load or pedestrian load, the traditional technical means is to use Tuned Mass Dampers (TMD). The TMDs are generally composed of three parts, a spring element, a damping element and a mass element, and are divided into a horizontal TMD and a vertical TMD according to the moving direction of the mass element, wherein the vertical TMD is mainly used for controlling vortex-induced vibration and buffeting of a large-span bridge, floor slab vibration of an industrial plant, and man-induced vibration of a pedestrian bridge. Theories and practices prove that the tuned mass damper has a good effect of inhibiting vibration with excellent frequency.

Particularly, with the continuous progress of the technological level in the aspects of structural calculation, construction technology, building materials and the like, the span of the bridge is larger and larger, so that higher requirements on the anti-vibration performance of the bridge are provided. The Tuned Mass Damper (TMD) is mainly composed of three components, namely a mass block, an elastic element for tuning frequency and a damping element for dissipating structural vibration energy. The damping elements of small TMDs are typically rubber, and large TMDs employ additional fluid viscous dampers, etc.

The problems of the existing TMD are as follows: (1) the viscous damper has certain difficulty in realizing accurate damping adjustment, and the hydraulic viscous damper has the hidden danger of oil leakage, is difficult to maintain and difficult to adjust in the later period, and increases the difficulty and the cost of later-period maintenance; (3) for a large beam type TMD, the beam span is large, and the structure is cracked quickly due to large tensile stress generated by vibration, so that the service life is short; (2) the conventional TMD can only realize vertical or lateral vibration control, but the environmental loads such as wind and earthquake received by the building structure come from different directions, and the conventional TMD cannot control wind vibration and earthquake in different directions.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of single function, maintenance difficulty and the like in the prior art, the utility model provides a winding type eddy current tuned mass damper.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides a winding formula tuned mass damper of eddy current, including the base, set up symmetrically in a plurality of pillars on the base, wear to establish the crossbeam at the top of pillar, hang in the quality piece of crossbeam below, hang in the magnet of quality piece bottom, and be fixed in on the base, correspond the resistance support of the position department of magnet, wherein:

the resistance support is a hollow frame body with the left side and the right side communicated with each other, and is composed of a support panel, a support back plate, a support top plate and a support bottom plate which are arranged from front to back and from top to bottom, the support top plate and the support bottom plate respectively protrude downwards and upwards to form a plurality of protruding blocks, resistance wires are wound on the protruding blocks to form coil resistors, and the magnets are horizontally suspended in the resistance support and are not in contact with the protruding blocks.

Further, a plurality of pillars are including the cantilever pillar of controlling both ends and the shock strut of a plurality of symmetrical settings in the middle of, the quantity of shock strut is 2 or 4.

Furthermore, through holes are formed in the positions, corresponding to the cross beam, of the cantilever strut and the shock absorption strut, the two ends of the cross beam are in clearance fit with the through holes, and therefore the cross beam can be stretched along the axis of the through holes.

Furthermore, axial blind holes are formed in two ends of the cross beam, and the cross beam and the cantilever support column are fixed in a tensioning mode through the axial blind holes and high-strength bolts matched with the axial blind holes, so that the vertical rigidity of the cross beam can be adjusted in the field construction process through tensioning.

Preferably, a damping pad is additionally arranged at the position of the shock absorption strut corresponding to the cross beam.

Furthermore, a plurality of suspension ropes are fixed in the middle of the cross beam, and the mass block is fixed at the lower ends of the suspension ropes, so that the mass block is suspended in the middle of the cross beam.

Furthermore, suspension angle steels are fixed on the left side and the right side of the mass block, and the suspension angle steels consist of fixing strips and suspension strips which are perpendicular to each other.

Preferably, the fixed strip of the suspension angle steel is fixed at the bottom end of the side face of the mass block, and a plurality of suspension rods are fixed on the suspension strip; the upper end of the suspension rod is fixed on the suspension bar, and the lower end of the suspension rod is fixed with the outer edge of the magnet, so that the magnet is suspended in the resistor support.

As an alternative scheme, suspension angle steels are fixed on the front side and the rear side of the mass block, and vertical magnets are suspended below the suspension angle steels; the resistance support comprises a resistance support body and is characterized in that a plurality of protruding blocks are arranged on a support panel and a support back plate of the resistance support body, resistance wires are wound on the protruding blocks to form a coil resistor, and the magnet is vertically suspended in the resistance support body and does not contact with the protruding blocks.

Compared with the prior art, the beneficial effect of adopting the technical scheme is that:

(1) the winding type eddy current tuned mass damper based on the double damping energy dissipation mechanism of the winding resistor and the damping pad is a great innovation based on the traditional tuned mass damper, can realize three-dimensional vibration reduction, has no oil leakage condition, is easy to maintain and has good durability;

(2) the frequency of the winding type eddy current tuned mass damper can be adjusted by changing the rigidity of the beam, the length of the suspender or the size of the mass block, and the damping parameters of the damper can be accurately adjusted by increasing or reducing the number of turns of the coil;

(3) through the vertical vibration of the mass block, the cantilever beam collides with the damping pad, so that the damping energy consumption is realized, and the purpose of controlling the vertical vibration is achieved; through the transverse vibration of the mass block, the coil resistor and the magnet generate relative motion, so that the eddy current damping energy consumption is realized, and the aim of controlling the transverse vibration is fulfilled;

(4) the coil resistor replaces a copper plate in the traditional mass damper to be used as a conductor material, so that the use of the conductor material can be reduced.

Drawings

The drawings, in which like reference numerals refer to like parts, are for the purpose of illustrating particular embodiments only and are not to be construed as limiting the utility model.

Fig. 1 is a schematic structural diagram of a wound eddy current tuned mass damper according to embodiment 1.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a perspective view from the front of the resistance holder 6 of the present invention.

Fig. 4 is a left side view of the resistance bracket 6 of the present invention.

Fig. 5 is a schematic structural diagram of the wound eddy current tuned mass damper according to embodiment 2.

Fig. 6 is a sectional view taken along line B-B of fig. 5.

In the figure:

1-base, 2-pillar, 3-beam, 4-mass block, 5-magnet, 6-resistance support;

21-cantilever strut, 22-shock strut, 23-through hole, 24-damping pad;

31-axial blind hole, 32-high-strength bolt and 33-sling;

41-suspension angle steel and 42-suspension rod; 411-fixed bar, 412-hanging bar;

61-bump, 62-coil resistor, 63-bracket top plate, 64-bracket bottom plate, 65-bracket panel, 66-bracket back plate.

Detailed Description

The technical solution of the present invention is further described in detail with specific embodiments in the following with reference to the accompanying drawings. It should be understood that the following examples are illustrative only and are not intended to limit the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships that are merely used to facilitate the description of the present invention and to simplify the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Example 1

Referring to fig. 1 and fig. 2, a winding type eddy current tuned mass damper according to the present invention includes a base 1, a plurality of pillars 2 symmetrically disposed on the base 1, a beam 3 penetrating the tops of the pillars 2, a mass 4 suspended below the beam 3, a magnet 5 suspended at the bottom of the mass 4, and a resistor bracket 6 fixed on the base 1 at a position corresponding to the magnet 5, wherein:

referring to fig. 3 and 4, the resistance support 6 is a hollow frame body with left and right sides penetrating through, and is composed of a support panel 65, a support back plate 66, a support top plate 63, and a support bottom plate 64, the support top plate 63 and the support bottom plate 64 respectively protrude downwards and upwards to form a plurality of bumps 61, resistance wires are wound on the bumps 61 to form a coil resistor 62, the magnet 5 is horizontally suspended inside the resistance support 6 and has no contact with the bumps 61, when the mass block 4 vibrates transversely, relative motion occurs between the magnet 5 and the coil resistor 62, and thus, a damping force is generated, and therefore, the effects of shock absorption and energy dissipation are achieved.

Further, as shown in fig. 1, the plurality of struts 2 include cantilever struts 21 at left and right ends and a plurality of shock-absorbing struts 22 arranged symmetrically in the middle, and the number of the shock-absorbing struts 22 is 2 or 4.

Preferably, through holes 23 are formed in positions, corresponding to the cross beam 3, of the cantilever strut 21 and the shock strut 22, and two ends of the cross beam 3 are in clearance fit with the through holes 23, so that the cross beam 3 can be tensioned along the axis of the through holes 23.

Preferably, axial blind holes 31 are formed in two ends of the cross beam 3, the cross beam 3 and the cantilever support 21 are tensioned and fixed through the axial blind holes 31 and high-strength bolts 32 matched with the axial blind holes 31, so that the vertical rigidity of the cross beam 3 can be adjusted through tensioning in site construction.

Preferably, a damping pad 24 is further added at a position of the shock strut 22 corresponding to the cross beam 3, and when the mass block 4 vertically vibrates, an energy dissipation effect is achieved through collision between the cross beam 3 and the damping pad 24.

Furthermore, a plurality of suspension ropes 33 are fixed in the middle of the cross beam 3, and the mass block 4 is fixed at the lower ends of the suspension ropes 33, so that the mass block 4 is suspended in the middle of the cross beam 3.

Further, suspension angle iron 41 is fixed on the left and right sides of the mass block 4, and the suspension angle iron 41 is composed of a fixing strip 411 and a suspension strip 412 which are perpendicular to each other. The fixing strip 411 of the suspension angle steel 41 is fixed at the bottom end of the side surface of the mass block 4, and a plurality of suspension rods 42 are fixed on the suspension strip 412; the upper end of the suspension rod 42 is fixed to the suspension bar 412, and the lower end is fixed to the outer edge of the magnet 5, so that the magnet 5 is suspended in the resistor support 6.

In the embodiment of the present invention, the fixing manners between the cross beam 3 and the suspension cable 33, between the suspension cable 33 and the mass block 4, between the mass block 4 and the suspension angle 41, between the suspension angle 41 and the suspension rod 42, and between the suspension rod 42 and the magnet 5 may be welding or bolting according to design, processing or construction requirements, and may be direct connection or indirect connection through an intermediate conversion device. The fixing means given here are only examples and the meaning of the fixing means in the present invention can be understood by those skilled in the art as the case may be.

In this embodiment, when the structural member connected to the damper of the present invention generates a transverse vibration, the mass block 4 transmits the vibration to the magnet 5 transversely disposed, so that a relative motion between the magnet 5 and the coil resistor 62 in the resistor support 6 is generated to generate an induced current, and the induced current generates a new magnetic field opposite to the original magnetic field to form a damping force for blocking the relative motion of the magnet 5 and the coil resistor 62, thereby achieving the effects of damping and dissipating energy; when the structural member connected to the damper of the present invention vibrates vertically, the energy dissipation effect is achieved by the collision between the cross beam 3 and the damping pad 24, so that the amplitude of the vibration is reduced.

Example 2

The winding type eddy current tuned damper shown in fig. 3 and 4 is different from embodiment 1 in that: a suspension angle steel 41 is fixed on the front side and the rear side of the mass block 4, and a vertical magnet 5 is suspended below the suspension angle steel 41; a plurality of bumps 61 are arranged on the support panel 65 and the support back plate 66 of the resistance support 6, a resistance wire is wound on the bumps 61 to form a coil resistance 62, and the magnet 5 is vertically suspended inside the resistance support 6 and is not in contact with the bumps 61.

In this embodiment, when a structural member connected to the damper of the present invention vibrates vertically, on one hand, the energy dissipation effect is achieved by collision between the cross beam 3 and the damping pad 24, and on the other hand, the mass block 4 transmits the vibration to the vertically arranged magnet 5, so that relative motion between the magnet 5 and the coil resistor 62 in the resistor support 6 is caused to generate induced current, and the induced current generates a new magnetic field opposite to the original magnetic field direction, thereby forming a damping force for preventing the relative motion of the magnet 5 and the coil resistor 62, thereby achieving the effects of absorbing shock and dissipating energy.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The winding type eddy current tuned mass damper is characterized by comprising a base (1), a plurality of pillars (2) symmetrically arranged on the base (1), a cross beam (3) penetrating through the tops of the pillars (2), a mass block (4) suspended below the cross beam (3), a magnet (5) suspended at the bottom of the mass block (4), and a resistor support (6) fixed on the base (1) and corresponding to the position of the magnet (5), wherein:

the resistor support (6) is a hollow frame body with the left side and the right side communicated, and consists of a support panel (65), a support back plate (66), a support top plate (63) and a support bottom plate (64) which are arranged front and back and up and down; the support top plate (63) and the support bottom plate (64) respectively protrude downwards and upwards to form a plurality of protruding blocks (61), resistance wires are wound on the protruding blocks (61) to form a coil resistor (62), and the magnet (5) is horizontally suspended inside the resistor support (6) without contact with the protruding blocks (61).

2. The wound eddy current tuned mass damper according to claim 1, wherein the plurality of struts (2) comprise cantilever struts (21) with left and right ends and a plurality of symmetrically arranged shock struts (22) in the middle, and the number of the shock struts (22) is 2 or 4.

3. The wound eddy current tuned mass damper according to claim 2, wherein the cantilever strut (21) and the shock strut (22) are provided with through holes (23) at positions corresponding to the cross beam (3), and two ends of the cross beam (3) are in clearance fit with the through holes (23) so that the cross beam (3) can be tensioned along the axis of the through holes (23).

4. The winding type eddy current tuned mass damper according to claim 2, wherein axial blind holes (31) are formed at two ends of the cross beam (3), and the cross beam (3) and the cantilever support (21) are tensioned and fixed through the axial blind holes (31) and high-strength bolts (32) matched with the axial blind holes (31).

5. Wound eddy current tuned mass damper according to claim 2, characterized in that a damping pad (24) is further added to the shock strut (22) at a location corresponding to the cross beam (3).

6. The wound eddy current tuned mass damper according to claim 1, characterized in that several suspension cables (33) are fixed in the middle of the cross beam (3), the mass (4) is fixed at the lower end of the suspension cables (33), so that the mass (4) is suspended in the middle of the cross beam (3).

7. The wound eddy current tuned mass damper according to claim 1, characterized in that suspension angles (41) are fixed to the left and right sides of the mass (4), the suspension angles (41) being composed of mutually perpendicular fixing strips (411) and suspension strips (412).

8. The wound eddy current tuned mass damper according to claim 7, characterized in that the fixing strips (411) of the suspension angles (41) are fixed to the bottom end of the sides of the mass (4), and a plurality of suspension rods (42) are fixed to the suspension strips (412); the upper end of the suspension rod (42) is fixed on the suspension bar (412), and the lower end of the suspension rod is fixed with the outer edge of the magnet (5), so that the magnet (5) is suspended in the resistor support (6).

9. The wound eddy current tuned mass damper according to claim 1, characterized in that suspension angles (41) are fixed at the front and rear sides of the mass (4), and a vertical magnet (5) is suspended below the suspension angles (41); the manufacturing method of the resistor support comprises the steps that a plurality of protruding blocks (61) are arranged on a support panel (65) and a support back plate (66) of the resistor support (6), resistance wires are wound on the protruding blocks (61) to form a coil resistor (62), and the magnet (5) is vertically suspended inside the resistor support (6) and is not in contact with the protruding blocks (61).