CN217557217U - Checkerboard Tuned Mass Damper Mounts - Google Patents

Abstract

The utility model relates to a chessboard type tuned mass damper support, which comprises a lower flange plate with a groove, a plurality of ball trays arranged in the lower flange plate, a plurality of balls arranged at the upper ends of the ball trays, an upper flange plate arranged on the balls, a plurality of SMA springs and a plurality of viscous dampers; the ball trays are uniformly arranged at intervals, and the size of the upper flange plate is larger than the distance between the ball trays; the SMA spring and the viscous damper are horizontally arranged, and two ends of the SMA spring and the viscous damper are respectively connected with the inner wall of the lower flange plate and the side wall of the upper flange plate; by adopting a rolling structure, a large displacement space is given to the mass block, an SMA shape memory alloy spring is adopted to transmit the interaction force between the TMD substructure and the main structure, and partial energy of the TMD substructure is consumed by the viscous damper.

Description

Checkerboard Tuned Mass Damper Mounts

technical field

The utility model relates to a checkerboard-type tuned mass damper support, which belongs to the technical field of engineering shock absorption.

Background technique

A tuned mass damper (TMD) is an effective structural vibration control device. When the TMD subsystem is added to the main structure, the natural frequency of the TMD is adjusted to be close to the natural frequency of the main structure. When the main structure is subjected to external power, the mass in the TMD will exert an inertial force in the opposite direction to the main structure. to damp the vibration of the main structure and dissipate the energy through the damping device in the TMD.

At present, the installation methods of TMD are mainly suspension type and support type. The suspension type is to suspend the mass block on the main structure, and set the spring and damper system between the suspended mass block and the main structure. For the movement stroke of TMD in the horizontal direction, the suspended rope needs to have a certain length, which occupies a large vertical space.

The support type is to support the mass block on the main structure through the movable support, but when the excellent period of the external excitation is close to the natural vibration period of the main structure, it is easy to cause the main structure to resonate, and the dynamic response of the main structure increases significantly, TMD The stroke is also significantly increased, and it is very likely that the displacement limit of the ordinary bearing will be exceeded. If the stroke size of TMD is limited, it will affect the effectiveness of TMD on structural vibration control. In view of this, many scholars have devoted themselves to exploring some more effective methods to ensure the travel of TMD in the horizontal direction.

Tuned mass damper (TMD) vibration reduction technology is widely valued for its characteristics of small changes to the original structure, simple construction, and significant vibration reduction effect, and has been widely used in civil engineering at home and abroad. In order to control the horizontal vibration of the structure, a suspended tuned mass damper is usually used. By adjusting the pendulum length, the frequency of the single pendulum is tuned to the frequency of the structure to achieve the effect of vibration control. But in many cases, due to space or technical reasons, the application of simple pendulum will be limited.

Utility model content

In view of the deficiencies in the prior art, the technical problem to be solved by this utility model is: changing the force-bearing form of the common bearing, so that the bearing can still support the mass block and provide recovery under the condition of large displacement. effect of force.

By adopting the rolling structure, the mass block is given a large displacement space, and the SMA shape memory alloy spring is used to transmit the interaction force between the TMD substructure and the main structure, and the viscous damper consumes part of the energy of the TMD substructure; in order to achieve For the above purpose, the present utility model adopts the following technical solutions: including a lower flange plate with grooves, a number of ball trays arranged in the lower flange plate, a number of balls arranged on the upper end of the ball tray, and a number of balls arranged in the lower flange plate The upper flange plate, a plurality of SMA springs and a plurality of viscous dampers on the balls; a plurality of the ball trays are evenly spaced, and the size of the upper flange plate is larger than the distance between the ball trays; the SMA springs and the viscous dampers The device is arranged horizontally, and the two ends are respectively connected with the inner wall of the lower flange plate and the side wall of the upper flange plate.

Further, a plurality of sliding blocks slidable in the horizontal direction are arranged on the side wall of the lower flange plate; each sliding block is connected with one of the SMA springs and a viscous damper.

Further, the shape of the upper flange plate and the lower flange plate is square.

Further, the number of the SMA springs, viscous dampers and sliders is a multiple of four, and the numbers in each direction are the same. Balance of flange plates.

Further, a spherical cap lining plate is provided above the ball tray, the spherical cap lining plate is provided with a plurality of grooves for placing the balls, and the balls on the upper part of the ball tray are connected to the ball tray through the spherical cap lining plate.

Further, the upper flange plate is connected to the column of the building structure through anchor bolts, and the lower flange plate is connected to the foundation through anchor bolts.

Compared with the prior art, the utility model has the following features and beneficial effects:

1. Compared with the lower displacement limit of the ordinary bearing, this bearing provides a larger range of motion for the upper auxiliary structure to meet the travel required for TMD to play a shock absorption role.

2. By installing TMD large-displacement movable bearings, a tuned mass damping system can be formed by using the mass of the auxiliary structure at the top of the building. When an earthquake occurs, the auxiliary structure at the top of the building can effectively avoid the whiplash effect and play a role in shock absorption. function of energy.

3. The utility model can replace the sling of a single pendulum, and place the upper auxiliary structure of the building on the support, which can effectively utilize the quality of the upper auxiliary structure, and avoid the adverse response during earthquake action, forming a convenient and inexpensive installation. A new type of TMD device with low cost, good energy consumption and excellent durability has great engineering significance.

Description of drawings

Fig. 1 is the sectional view of the present utility model;

Figure 2 is a schematic structural diagram of the present invention.

The reference signs are: 1, viscous damper; 2, SMA spring; 3, upper flange plate; 4, ball; 5, slider; 6, ball tray; 7, lower flange plate; 8, spherical cap Liner.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in Figures 1 to 2, it includes a lower flange plate 7 with grooves, a number of ball trays 6 arranged in the lower flange plate 7, a number of balls 4 arranged on the upper end of the ball tray 6, Upper flange plate 3, several SMA springs 2 and several viscous dampers 1; several ball trays 6 are evenly spaced, and the size of the upper flange plate 3 is larger than the distance between the ball trays 6; SMA springs 2 and viscous dampers 1 It is arranged horizontally, and the two ends are respectively connected with the inner wall of the lower flange plate 7 and the side wall of the upper flange plate 3 .

Preferably, a number of sliding blocks 5 that can slide in the horizontal direction are provided on the side wall of the lower flange plate 7 ; any sliding block 5 is connected to a group of SMA springs 2 and viscous dampers 1 .

Preferably, the shapes of the upper flange plate 3 and the lower flange plate 7 are square.

Preferably, the number of the SMA spring 2, the viscous damper 1 and the slider 5 is a multiple of four.

Preferably, a spherical cap lining plate 8 is provided above the ball tray 6 , and the spherical cap lining plate 8 is provided with a plurality of grooves for placing the balls 4 .

Preferably, the upper flange plate 3 is connected to the column of the building structure through anchor bolts, and the lower flange plate 7 is connected to the foundation through anchor bolts.

The working principle of the utility model: the upper flange plate 3 and the lower flange plate 7 are respectively connected with the node plate of the structural column, and the vibration period of the TMD is adjusted by changing the stiffness of the SMA spring; Connect the bolts and the column, then connect the lower flange plate 7 to the foundation through the anchor bolts, and then place the upper flange plate 3 in the upper center of the ball 4 of the lower flange plate 7, through the SMA spring 2 and both ends of the viscous damper 1 are respectively connected with the upper flange plate 3 and the lower flange plate 7 . By changing the stiffness of the SMA spring 2 to adjust the natural vibration period of the TMD, the period of the TMD is adjusted to be close to the natural vibration period of the structure. Under normal conditions, this bearing is used as a traditional bearing for support; when an earthquake occurs, the upper flange plate 3 and the lower flange plate 7 have a large relative displacement due to the action of the middle ball 4, and the TMD substructure The relative displacement occurs with the main structure, and the interaction force is generated, which is transmitted to the main structure by the SMA spring 2, thereby suppressing the vibration of the main structure and playing the role of shock absorption and energy consumption. The movement stroke of the TMD substructure is controlled by the side length of the lower flange plate 7, and its displacement limit can be significantly higher than that of the ordinary support.

Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Claims (6)

1. The chessboard-type tuned mass damper support is characterized in that: it comprises a lower flange plate (7) with grooves, a plurality of ball trays (6) arranged in the lower flange plate (7), A plurality of balls (4) on the upper end of the ball tray (6), an upper flange plate (3) arranged on the balls (4), a plurality of SMA springs (2) and a plurality of viscous dampers (1); a plurality of The ball trays (6) are arranged at even intervals, and the size of the upper flange plate (3) is larger than the distance between the ball trays (6); the SMA springs (2) and the viscous dampers (1) are arranged horizontally, Both ends are respectively connected with the inner wall of the lower flange plate (7) and the side wall of the upper flange plate (3). 2. The checkerboard-type tuned mass damper support according to claim 1, characterized in that: a plurality of sliders (5) that can slide in the horizontal direction are arranged on the side wall of the lower flange plate (7); Any one of the sliders (5) is connected with a group of the SMA springs (2) and the viscous damper (1). 3. The checkerboard type tuned mass damper support according to claim 1, characterized in that: the shape of the upper flange plate (3) and the lower flange plate (7) is square. 4. The checkerboard type tuned mass damper support according to claim 3, characterized in that: the number of the SMA spring (2), the viscous damper (1) and the slider (5) is a multiple of four. 5. The chessboard-type tuned mass damper bearing according to claim 1, characterized in that: a spherical crown lining plate (8) is arranged above the ball tray (6), and the spherical crown lining plate (8) is provided with There are several grooves for placing the balls (4). 6. The chessboard-type tuned mass damper bearing according to claim 1 is characterized in that: the upper flange plate (3) is connected with the column of the building structure through anchor bolts, and the lower flange plate (7) ) is connected to the foundation through anchor bolts.

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