CN219365591U - Tandem tuned mass damper with friction damping - Google Patents

Abstract

The utility model discloses a series tuned mass damper with friction damping, which comprises a spring base, a top connecting plate, a plurality of friction energy consumption rods, a spring, a plurality of first shaft rods, a plurality of second shaft rods and a plurality of mass blocks, wherein the spring base is provided with a plurality of first shaft rods; the first shaft rod and the second shaft rod are vertically arranged, the upper ends of the first shaft rod and the second shaft rod are connected with the top connecting plate, the lower ends of the second shaft rod are connected with the spring base, all the mass blocks are movably sleeved on the second shaft rod through the first through holes after being overlapped, and the mass blocks are pressed on the spring. All the mass blocks are overlapped and then sleeved on the friction energy dissipation rod in a sliding mode through the second through holes. The building structure vibrates under the action of vibration load, earthquake load and artificial load and other forms of impact load, and at the moment, the mass block moves up and down along the second shaft rod and the friction energy dissipation rod, compresses the spring and has a vibration reduction effect. The mass block, the spring and the friction energy consumption component respectively provide mass, rigidity and damping and act on the structure to carry out mass tuning on the structure so as to achieve damping control.

Description

Tandem tuned mass damper with friction damping

Technical Field

The utility model belongs to the technical field of dampers, and particularly relates to a series tuned mass damper with friction damping.

Background

The vibration generated by structures such as large-span underground track structures, gyms, schools, stadiums, super high-rise buildings and the like under the actions of vibration load, earthquake load and artificial load and other forms of impact load seriously affects the normal use of the structures and even leads to structural failure, thereby causing huge life and property loss, and the problems of earthquake resistance and impact resistance and the problems of vehicle and artificial load action are becoming more and more of the current research hot spots.

A tuned mass damper (tuned mass damper, TMD) system is characterized in that a mass block is added to the top of a main structure, rigidity and damping tuning is carried out on the mass block through a spring and a damper, and when the main structure vibrates, acting force which is reacted with the vibration direction of the main structure is generated, so that the effect of tuning and damping is achieved.

The tuned mass damper is applied in a large quantity in the structure, mainly aims at the problem of low-frequency vibration under the action of artificial load, and along with the construction of more and more large-span structures in China and the progress of the technical level, the vibration control of the structure is required to be higher and higher.

Disclosure of Invention

The utility model aims to provide a series tuned mass damper with friction damping, which solves the technical problems that in the prior art, the normal use of a structure is seriously influenced and even the structure is invalid due to vibration generated by the structure under the actions of vibration load, earthquake load, artificial load and other forms of impact load.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the series tuned mass damper with friction damping comprises a spring base, a top connecting plate, a plurality of friction energy dissipation rods, a spring, a plurality of first shaft rods, a plurality of second shaft rods and a plurality of mass blocks.

The first shaft rod and the second shaft rod are vertically arranged, the upper ends of the first shaft rod and the second shaft rod are connected with the top connecting plate, the lower end of the second shaft rod is connected with the spring base, and the lower end of the first shaft rod is lower than the spring base; a spring is sleeved on each second shaft, a first through hole is formed in each mass block, all the mass blocks are movably sleeved on the second shafts through the first through holes after being overlapped, and the mass blocks are pressed on the springs.

The mass blocks are overlapped and sleeved on the friction energy dissipation rod in a sliding mode through the second through holes, and the outer surface of the friction energy dissipation rod is contacted with the inner wall of the second through holes; the lower end of each friction energy consumption rod is fixedly connected with a limiting plate, a third passage is arranged on the limiting plate, and each limiting plate is sleeved on a first shaft rod corresponding to the limiting plate in a sliding mode through the third passage.

The structure such as building is under vibration load, earthquake load and artificial load, and the vibration that other forms impact load produced of structure, and the proof mass reciprocates along second shaft pole and friction power consumption pole this moment to compression spring plays the damping effect. And the mass block moves relatively along the second shaft rod and the friction energy dissipation rod to generate friction so as to provide friction energy dissipation. The mass block, the spring and the friction energy consumption component respectively provide mass, rigidity and damping and act on the structure to carry out mass tuning on the structure so as to achieve damping control.

The friction mechanism is utilized to perform energy consumption and shock absorption, the hysteresis effect is obvious, the speed correlation and displacement correlation are small, the performance is stable, the circulation durability is good, the damping can be generated under the tiny displacement, the tuned mass damper is used for performing shock absorption on the structure, the cost of the main structure can be greatly reduced, and the comfort and the safety are improved.

Through setting up the limiting plate, and establish its slidingtype cover at the first axostylus axostyle that corresponds with it, can adjust the slip condition that the quality is fast to slide smoothly and avoid the production of horizontal movement as far as possible in order not to influence shock attenuation effect.

Further preferably, the mass blocks are divided into two groups, and springs are arranged between the upper group of mass blocks and the lower group of mass blocks. By arranging two groups of springs, the vibration reduction effect is greatly improved.

Further preferably, the number of the first shaft rod, the second shaft rod and the friction energy dissipation rods is four, the top connecting plate is circular, and the first shaft rods are uniformly distributed along the circumference of the top connecting plate.

Further optimizing, be provided with a plurality of spliced poles on the top connecting plate, tuned mass damper passes through the spliced pole to be connected with the main structure, and the quantity and the position of spliced pole set up according to actual conditions, guarantee reliability, security and stability.

Further optimizing, the upper end of friction power consumption pole is provided with the stopper, prevents that friction power consumption pole from dropping from the quality is fast.

The beneficial effects are that:

1. the serial tuned mass damper with friction damping can realize damping control of the structure in the aspects of vibration load, earthquake load, vehicle and human load, impact load of other forms and the like, and can be used for structures such as large-span track structures, large-span bridges, stadiums, schools, pedestrian overpasses, stadiums, super high-rise buildings and the like, and when the building structure vibrates under the actions of vibration load, earthquake load and human load and the vibration generated by the structure under the actions of other forms of impact load, the mass block moves up and down along the second shaft rod and the friction energy consumption rod, compresses the springs and plays a role in damping. And the mass block moves relatively along the second shaft rod and the friction energy dissipation rod to generate friction so as to provide friction energy dissipation. The mass block, the spring and the friction energy consumption component respectively provide mass, rigidity and damping and act on the structure to carry out mass tuning on the structure so as to achieve damping control.

2. The damping design for the structure can greatly reduce the cost of the main structure, improve the comfort and the safety, and has the advantages of low manufacturing cost, convenient installation and replacement, easy parameter control and the like.

3. Through setting up the limiting plate, and establish its slidingtype cover at the first axostylus axostyle that corresponds with it, can adjust the slip condition that the quality is fast to slide smoothly and avoid the production of horizontal movement as far as possible in order not to influence shock attenuation effect.

Drawings

FIG. 1 is a block diagram of a series tuned mass damper with friction damping according to the present utility model;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic illustration of the installation location of a series tuned mass damper with friction damping according to the present utility model;

FIG. 4 is a graph comparing acceleration time course for a tuned mass damper structure without dampers and with friction damping in a common band, and a series tuned mass damper structure with friction damping;

FIG. 5 is a frequency response comparison of a tuned mass damper structure without damper with common band friction damping and a series tuned mass damper structure with friction damping.

Detailed Description

The following detailed description of embodiments of the utility model, given in conjunction with the accompanying drawings, will clearly and fully describe the technical solutions of the utility model, it being evident that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 and 2, the series tuned mass damper with friction damping comprises a spring base 1, a top connecting plate 2, four friction energy dissipation rods 3, springs 5, four first shafts 7, four second shafts 6, and a plurality of masses 10. The first shaft rod 7 and the second shaft rod 6 are vertically arranged, the upper ends of the first shaft rod 7 and the second shaft rod 6 are connected with the top connecting plate 2, the lower end of the second shaft rod 6 is connected with the spring base 1, and the lower end of the first shaft rod 7 is lower than the spring base 1.

In this embodiment, all the mass blocks 10 are divided into two groups up and down, each second shaft 6 is sleeved with two springs 5, one spring is located between the upper and lower groups of mass blocks 10, the other spring 5 is located between the lower group of mass blocks and the spring base 1, and the springs are compressed. By arranging two groups of springs, the vibration reduction effect is greatly improved. The mass blocks 10 are provided with first through holes, the number of which is the same as that of the second shaft rods, and the mass blocks 10 are movably sleeved on the corresponding second shaft rods 6 through the first through holes after being overlapped.

In other embodiments, the masses may not be divided into two groups, the springs being arranged only between the masses and the spring mount 1. Alternatively, the mass blocks 10 are divided into a plurality of groups, and springs are provided between adjacent two groups of mass blocks 10. As the case may be.

The mass blocks 10 are provided with second through holes, the number of which is the same as that of the friction energy consumption rods, all the mass blocks 10 are sleeved on the corresponding friction energy consumption rods 3 in a sliding mode through the second through holes after being overlapped, and the outer surfaces of the friction energy consumption rods 3 are in contact with the inner walls of the second through holes; the lower end of each friction energy consumption rod 3 is fixedly connected with a limiting plate 4, a third passage is arranged on the limiting plate 4, and each limiting plate 4 is sleeved on a corresponding first shaft rod 7 through the third passage in a sliding mode.

The structure such as building is under vibration load, earthquake load and artificial load, and the vibration that other forms impact load produced of structure, and the proof mass reciprocates along second shaft pole 6 and friction power consumption pole 3 this moment to the compression spring plays the damping effect. And the mass block moves relatively along the second shaft rod 6 and the friction energy dissipation rod to generate friction so as to provide friction energy dissipation. The mass block, the spring and the friction energy consumption component respectively provide mass, rigidity and damping and act on the structure to carry out mass tuning on the structure so as to achieve damping control.

The damping device has the advantages that the damping device utilizes a friction mechanism to perform energy consumption and damping, is strong in applicability, obvious in hysteresis effect, small in speed correlation and displacement correlation, stable in performance, good in circulation durability, free of later maintenance, simple in structure, low in cost and the like, damping can be generated under the condition of micro displacement, and the main structure cost can be greatly reduced by performing damping design on a structure by a tuned mass damper, so that the comfort and safety are improved.

Through setting up limiting plate 4, and establish its slidingtype cover at the first axostylus axostyle 7 that corresponds with it, can adjust the slip condition of mass soon 10 to slide smoothly and avoid the production of horizontal movement as far as possible in order not to influence the shock attenuation effect.

In this embodiment, the mass blocks 10 are divided into two groups, and springs 5 are also provided between the upper and lower groups of mass blocks 10. By arranging two groups of springs, the vibration reduction effect is greatly improved.

In this embodiment, the number of the first shaft rod 7, the second shaft rod 6 and the friction energy dissipation rods 3 is four, the top connecting plate 2 is circular, and as shown in fig. 2, the first shaft rods 7 are uniformly distributed along the circumferential direction of the top connecting plate 2. The mass block 10 is formed by overlapping round steel plates.

In this embodiment, the top connection plate 2 is provided with a plurality of connection posts 8, and the tuned mass damper is connected to the main structure through the connection posts 8, and the whole damper is in a suspended state. The quantity and the position of spliced pole set up according to actual conditions, guarantee reliability, security and stability.

In this embodiment, a stopper is disposed at the upper end of the friction energy dissipation rod 3 to prevent the friction energy dissipation rod 3 from falling off from the mass.

The number and positions of dampers are set on the building body according to the specific conditions. As shown in fig. 3, there are a total of 5 mounting locations, requiring the mounting of 5 series tuned mass dampers with friction damping as described herein.

Acceleration time course analysis and frequency response analysis are performed through finite element software, and referring to fig. 4 and 5, the first model is an original structure, the second model is a common tuned mass damper structure with friction damping, the third model is a series tuned mass damper structure with friction damping, compared with the common tuned mass damper with friction damping, the series tuned mass damper can reduce the earthquake effect by about 10.3%, compared with the original structure, the earthquake effect is reduced by about 74.6%, and the earthquake resistance of the main structure is remarkably improved.

Any modifications and substitutions made within the spirit and principles of the present utility model are within the scope of the present utility model.

Claims (5)

1. Series tuned mass damper with friction damping, characterized in that: the device comprises a spring base (1), a top connecting plate (2), a plurality of friction energy consumption rods (3), springs (5), a plurality of first shaft rods (7), a plurality of second shaft rods (6) and a plurality of mass blocks (10);

the first shaft rod (7) and the second shaft rod (6) are vertically arranged, the upper ends of the first shaft rod and the second shaft rod are connected with the top connecting plate (2), the lower end of the second shaft rod (6) is connected with the spring base (1), and the lower end of the first shaft rod (7) is lower than the spring base (1); a spring (5) is sleeved on each second shaft (6), a first through hole is formed in each mass block (10), all the mass blocks (10) are movably sleeved on the second shaft (6) through the first through holes after being overlapped, and the mass blocks (10) are pressed on the springs;

the mass blocks (10) are provided with second through holes, all the mass blocks (10) are sleeved on the friction energy dissipation rod (3) in a sliding mode through the second through holes after being overlapped, and the outer surface of the friction energy dissipation rod (3) is contacted with the inner wall of the second through holes; the lower end of each friction energy consumption rod (3) is fixedly connected with a limiting plate (4), a third passage is formed in the limiting plate (4), and each limiting plate (4) is sleeved on a first shaft rod (7) corresponding to the limiting plate through the third passage in a sliding mode.

2. The series tuned mass damper with friction damping of claim 1, wherein: the mass blocks (10) are divided into an upper group and a lower group, and springs (5) are arranged between the upper group and the lower group of mass blocks (10).

3. The series tuned mass damper with friction damping of claim 1, wherein: the number of the first shaft rods (7), the second shaft rods (6) and the friction energy dissipation rods (3) is four, the top connecting plate (2) is round, and the first shaft rods (7) are uniformly distributed along the circumference of the top connecting plate (2).

4. The series tuned mass damper with friction damping of claim 1, wherein: a plurality of connecting columns (8) are arranged on the top connecting plate (2), and the tuning mass damper is connected with the main structure through the connecting columns (8).

5. The series tuned mass damper with friction damping of claim 1, wherein: the upper end of the friction energy consumption rod (3) is provided with a limiting block.