CN211446562U

CN211446562U - Frequency-adjustable collision type tuned mass damper

Info

Publication number: CN211446562U
Application number: CN201922177893.8U
Authority: CN
Inventors: 施竹珺; 盛刘平; 夏明明
Original assignee: Jiangsu Lubo Damping Technology Co ltd
Current assignee: Jiangsu Lubo Damping Technology Co ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-09-08
Anticipated expiration: 2029-12-09

Abstract

The utility model relates to a harmonious mass damper of frequency adjustable collision type, stride girder steel, quality piece and collision support including bottom plate, cantilever support, list, cantilever support, collision support have a set ofly respectively, the vertical fixation is on the bottom plate, the girder steel that singly strides runs through collision support, singly stride the girder steel both ends respectively with two cantilever support connections, the quality piece is fixed singly strides the girder steel center and corresponds the setting between two collision supports, the quality piece can be at vertical and transverse frequency vibration. Compared with the prior art, the damping energy dissipation mechanism is different, viscous liquid used by the traditional viscous damping mechanism is likely to leak, collision energy dissipation is cleaner, the control effect of the damping device is good, meanwhile, the boundary condition of the end part of the single span beam can be adjusted, a larger frequency adjustment space can be provided, the structure is simple, the maintenance and installation are easy, the durability is good, and the like.

Description

Frequency-adjustable collision type tuned mass damper

Technical Field

The utility model belongs to the technical field of civil engineering structure vibration control technique and specifically relates to a harmonious mass damper of collision type of frequency adjustable is related to.

Background

Modern bridge design gradually develops towards large span, light and soft directions due to the progress of computational theory and computer technology, light modeling inevitably costs rigidity of the bridge, and vibration caused by insufficient rigidity of the bridge under the action of wind load becomes an inevitable problem. For the pedestrian overpass, the structural system is soft and is under the power excitation of pedestrian walking, and the natural vibration frequency is generally close to the walking frequency of the pedestrian, about 2-3 Hz, so that vertical resonance is easily generated to cause discomfort of the pedestrian.

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 TMD is mainly composed of a mass unit, an elastic unit that can provide an elastic restoring force, and a damping unit that can provide a damping force. TMDs are typically in the form of a supported TMD that can be controlled for vertical vibration using vertical springs to provide restoring force.

The traditional TMD adopts a hydraulic viscous damper to provide damping, has certain rigidity while providing the damping, and cannot realize the separation of the rigidity and the damping, so that the realization of accurate damping adjustment has certain difficulty. And the hydraulic viscous damper still has the hidden danger of oil leak, is difficult for the maintenance, and the later stage is difficult to adjust, increases the degree of difficulty and the cost of later stage maintenance.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a harmonious mass damper of frequency adjustable collision type uses the less list of a rigidity to stride the girder steel and provides rigidity, and the quality piece is fixed and is striden of girder steel singly, can adopt new damping power consumption mechanism simultaneously in the transverse vibration of vertical and girder steel, strides near the collision support that has set up the trompil in the girder steel singly, carries out the power consumption through the continuous collision of girder steel and support.

The utility model discloses a realize through following technical scheme:

the utility model provides a harmonious mass damper of frequency adjustable collision type, includes bottom plate, cantilever support, single girder steel of striding, quality piece and collision support, cantilever support, collision support have a set ofly respectively, the vertical fixation is on the bottom plate, the single girder steel of striding runs through collision support, single girder steel both ends of striding are connected with two cantilever supports respectively, the quality piece is fixed at single girder steel center of striding and is corresponded the setting and between two collision supports, and the quality piece can vibrate at vertical and transverse frequency.

Preferably, the two collision supports are respectively and correspondingly provided with a through hole, the inner wall of each through hole is provided with a damping material, and the single-span steel beam penetrates through the damping material.

For convenience of adjustment, the mass block is composed of a plurality of mass sheets, and the mass sheets are connected through fasteners.

In order to facilitate fixing, the two ends of the single-span steel beam are connected with the two cantilever supports through first bolts respectively.

In order to realize different fixing effects, circular wedge bodies are respectively sleeved outside two ends of the single-span steel beam, taper holes are respectively formed in the two cantilever supports, and the circular wedge bodies are inserted into the taper holes.

The utility model has the advantages that: the collision type tuned mass damper with the adjustable frequency is simple in structure, obvious in vibration isolation effect, free of oil leakage and the like, easy to maintain and good in durability.

Drawings

Fig. 1 is a schematic structural view of a frequency-tunable collision-type tuned mass damper according to the present invention;

FIG. 2 is a schematic sectional view A-A of FIG. 1;

FIG. 3 is a schematic sectional view of the structure of FIG. 1B-B;

FIG. 4 is a schematic cross-sectional view of C-C of FIG. 1;

FIG. 5 is a schematic view of the connection structure of the single span beam end of the present invention;

in the figure, 1, a bottom plate, 2, a cantilever support, 3, a single-span steel beam, 4, a mass block, 5, a collision support, 6, a damping material, 7, a first bolt and 8, a circular wedge body.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be clearly and clearly defined.

As shown in fig. 1-5, a frequency-adjustable impact tuned mass damper includes a bottom plate 1, cantilever brackets 2, a single-span steel beam 3, a mass block 4 and an impact bracket 5, wherein the cantilever brackets 2 and the impact bracket 5 are respectively provided with a set and vertically welded on the bottom plate 1, the single-span steel beam 3 penetrates through the impact bracket 5, two ends of the single-span steel beam 3 are respectively connected with the two cantilever brackets 2, the mass block 4 is fixed at the center of the single-span steel beam 3 and correspondingly arranged between the two impact brackets 5, and the mass block 4 can vibrate at vertical and transverse frequencies.

The single-span steel beam 3 penetrates through the collision support 5, a through hole is formed in the corresponding position on the collision support 5, the outer diameter of the single-span steel beam relative to the aperture needs to be reasonably designed, the diameter is not too large, collision cannot occur, the diameter is not too small, and the collision effect is weakened.

The inner edge of the through hole of the collision support 5 is glued with a certain thickness of damping material 6 (damping ring).

The whole mass of the mass block 4 can be increased or reduced through mass pieces, and the mass pieces are tightly connected in a fastener connection mode.

The mass block 4 and the single-span steel beam are connected in a tight fit manner, and mutual dislocation cannot be generated under normal working.

The tuned mass damper not only has a damping effect in the vertical direction, but also can provide an equivalent damping effect in the transverse direction of the single-span steel beam.

The two ends of the single-span steel beam 3 are connected with the cantilever support 2 through the first bolts 7, the single-span steel beam 3 is a two-end simply supported beam when the circular wedge 8 is not added, the single-span steel beam 3 is a two-end fixedly supported beam when the circular wedge 8 is added for screwing, and the actual boundary can be located between the simply supported beam and the fixedly supported beam.

When vibration takes place such as overpass or highway bridge, can use the utility model discloses a frequency adjustable collision type harmonious mass damper. The vibration of the bridge is mainly reflected by vertical human-induced vibration and transverse wind vibration, and the damper can simultaneously play a role in damping the vibration in the two directions. The single-span steel beam provides reasonable rigidity, and the tuned mass damper has a natural vibration frequency together with the mass block, and the natural vibration frequency is close to the vibration frequency of the bridge deck, so that a good vibration damping effect can be achieved. When the design the utility model discloses the time, can design and twist the certain degree for the ring wedge body, so this wedge body can further screw up at on-the-spot actual debugging in-process, also can unscrew or remove, thereby makes the utility model discloses the frequency has a great adjustment interval, more agrees with the complicated polygon of engineering practice. In the normal working process, the mass block vibrates vertically or transversely, the single-span steel beam is coated with damping materials on the inner wall of the round hole of the collision support and the collision support, and the energy consumption effect can be further played.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "side", "end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Finally, it should be noted that: the above embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. A frequency-tunable collisional tuned mass damper, characterized in that: the single-span steel beam vibration damping device comprises a bottom plate, cantilever supports, a single-span steel beam, a mass block and a collision support, wherein the cantilever supports and the collision support are respectively provided with a group and are vertically fixed on the bottom plate, the single-span steel beam penetrates through the collision support, two ends of the single-span steel beam are respectively connected with the two cantilever supports, the mass block is fixed at the center of the single-span steel beam and correspondingly arranged between the two collision supports, and the mass block can vibrate at vertical and transverse frequencies.

2. The frequency tunable tuned mass damper of claim 1, wherein: through holes are correspondingly formed in the two collision supports respectively, damping materials are arranged on the inner walls of the through holes, and the single-span steel beam penetrates through the damping materials.

3. The frequency tunable tuned mass damper of claim 1, wherein: the mass block is composed of a plurality of mass sheets, and the mass sheets are connected through fasteners.

4. The frequency tunable tuned mass damper of claim 1, wherein: and two ends of the single-span steel beam are connected with the two cantilever supports through first bolts respectively.

5. The frequency tunable tuned mass damper according to claim 1 or 4, characterized in that: the two ends of the single-span steel beam are respectively sleeved with a circular wedge body, the two cantilever supports are respectively provided with a taper hole, and the circular wedge bodies are inserted into the taper holes.