A shock-absorbing column with particle damper

Abstract

The present invention discloses a shock-absorbing column with a particle damper, comprising a controlled column, an energy-consuming layer, a particle damper, and a supporting mechanism. The controlled column is a steel-concrete composite column, the supporting mechanism is fixedly connected to the controlled column, and the bottom of the particle damper is connected to the supporting mechanism by a spring. The particle damper is a sealed body, comprising an outer plate, an inner plate, a front plate, and a rear plate. The outer plate, inner plate, front plate, and rear plate divide the particle damper into a sealed cavity and an interlayer. The sealed cavity is filled with liquid, and the interlayer is provided with a number of partitions, which divide the interlayer into a number of buffer spaces filled with damping particles. The present invention has multiple energy dissipation mechanisms, including particle collision, frictional energy dissipation, spring restoring force energy dissipation, and frictional energy dissipation between the particle damper and the energy-consuming layer, which can meet the shock absorption needs of structures with different amplitudes.

Description

Technical Field

[0001] The invention relates to the field of building engineering structures, and in particular to a shock-absorbing column with a particle damper. Background Art

[0002] While the rapid development of railway transportation systems in recent years has brought convenience to society, the environmental vibration generated by train operation has had a significant negative impact on nearby buildings. Vibration has been internationally classified as one of the seven major environmental hazards. Therefore, to ensure the safety of engineering structures and their compatibility with architectural, environmental, and operational requirements, structural vibration control technology has become one of the best options as a safe, economical, and effective measure.

[0003] Particle damping technology utilizes friction and impact between tiny particles within a confined, enclosed space within a vibrating body to dissipate system vibration energy. This technology offers advantages such as excellent durability, high reliability, insensitivity to temperature fluctuations, and ease of use in harsh environments. However, the stacked particles within traditional particle dampers restrict their mobility, and collisions between particles and the cavity are mostly elastic, limiting their energy dissipation. Furthermore, traditional particle dampers struggle to meet the demands of varying vibration amplitudes, and dynamic vibration absorption technology also suffers from a narrow frequency band. To improve the damping performance of traditional particle dampers, domestic researchers have proposed a variety of particle dampers, including the composite magnetorheological fluid particle damper (CN108547496B), which addresses shortcomings such as time lag and high noise levels; the variable-stiffness electromagnetic particle damper (CN109577726B), which maximizes damping efficiency; and the particle damper with a built-in obstacle network (CN114607720A), which enables multi-directional vibration damping. However, the spectrum of the vibration caused by the train transmitted to the structural floor is mainly low-frequency vibration between 1 and 20 Hz, and the above-mentioned particle damper vibration reduction technology still cannot completely solve the problem of controlling the vertical vibration of the structure caused by the train. Summary of the Invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a shock-absorbing column with a particle damper that can multiple-mitigate the vibration energy of a controlled column component to solve the above-mentioned technical problems.

[0005] Technical solution: The present invention provides a shock-absorbing column with a particle damper, which includes a controlled column, a particle damper, and a supporting mechanism. The supporting mechanism is fixedly connected to the controlled column, and the bottom of the particle damper is connected to the supporting mechanism through a spring. The particle damper is a sealed body, including an outer plate, an inner plate, a front end plate and a rear end plate. The outer plate, the inner plate, the front end plate and the rear end plate divide the particle damper into a sealed cavity and an interlayer. The sealed cavity is filled with liquid, and a plurality of partitions are provided in the interlayer. The partitions divide the interlayer into a plurality of buffer spaces filled with damping particles.

[0006] Furthermore, a liquid partition is provided in the middle of the particle damper for dividing the sealed cavity into a first cavity and a second cavity. The first cavity and the second cavity are respectively filled with different liquids with significantly different liquid densities and / or volumes.

[0007] Furthermore, an energy dissipation layer is provided between the supporting mechanism and the particle damper, and the energy dissipation layer is fixedly connected to the inner wall of the supporting mechanism.

[0008] Furthermore, the supporting mechanism includes a steel support and a supporting steel plate. The steel support is a welded one-piece steel component, including a bottom plate, a side plate and a connecting plate; the supporting steel plate includes a first supporting steel plate and a second supporting steel plate; the first supporting steel plate is arranged in pairs and welded to the side plate and the connecting plate to form a whole, and the second supporting steel plate is welded to the first supporting steel plate to form a whole; the connecting plate is fixedly connected to the controlled column.

[0009] Furthermore, the energy dissipation layer is connected to the inner wall of the second supporting steel plate through an adhesive.

[0010] Furthermore, the damping particles are spheres of uniform size.

[0011] Furthermore, the filling rate of the damping particles in the buffer space is between 40% and 85%.

[0012] Furthermore, the controlled column is a steel column, a concrete column or a steel-concrete composite column.

[0013] Furthermore, a plurality of particle dampers may be arranged in the vertical direction on the side of the controlled column.

[0014] Furthermore, a plurality of reserved holes are provided on the connecting plate, and the connecting plate is fixedly connected to the controlled column by bolts.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0016] (1) The present invention utilizes the kinetic energy of liquid to transmit power, so that the damping particles can collide and consume energy under small vibrations, which can widen the vibration reduction frequency band of the dynamic vibration absorption technology and effectively improve the shock absorption effect of the particle damper;

[0017] (2) The present invention has multiple energy dissipation mechanisms, including particle collision, friction energy dissipation, spring restoring force energy dissipation, and friction energy dissipation between the particle damper and the energy dissipation layer, which can meet the shock absorption requirements of different amplitudes of the structure;

[0018] (3) The particle damper of the present invention is easy to install and replace, and a plurality of the particle dampers can be arranged along the height direction of the controlled column component to release the vibration energy of the controlled column in multiple ways, thereby improving the safety and comfort of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the steel support of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the support plate of the present invention;

[0022] Figure 4 Schematic diagram of the supporting mechanism of the present invention;

[0023] Figure 5 This is a schematic structural diagram of one side of the particle damper of the present invention;

[0024] Figure 6 Schematic diagram of the overall structure of the particle damper of the present invention;

[0025] Figure 7 This is a cross-sectional view of the particle damper of the present invention. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] A shock absorbing column with a particle damper according to the present invention, such as Figure 1 As shown, it includes a controlled column 1, a particle damper 2, and a supporting mechanism 3. The controlled column 1 is a steel-concrete composite column. The supporting mechanism 3 is fixedly connected to the controlled column 1. The bottom of the particle damper 2 is connected to the supporting mechanism 3 through a spring 4. The particle damper 2 is a sealed body, including an outer plate 21, an inner plate 22, a front end plate 23 and a rear end plate. The outer plate 21, the inner plate 22, the front end plate 23 and the rear end plate divide the particle damper 2 into a sealed cavity 25 and an interlayer 26. The sealed cavity 25 is filled with liquid. A plurality of partitions 261 are provided in the interlayer 26. The partitions 261 divide the interlayer 26 into a plurality of buffer spaces filled with damping particles 262.

[0028] like Figure 2-3 As shown, the supporting mechanism 3 includes a steel support 31 and a supporting steel plate 32. The steel support 31 is a welded integral steel member, including a bottom plate 311, a side plate 312 and a connecting plate 313; the supporting steel plate 32 includes a first supporting steel plate 321 and a second supporting steel plate 322; the first supporting steel plate 321 is arranged in pairs and is welded to the side plate 312 and the connecting plate 313 to form a whole, and the second supporting steel plate 322 is welded to the first supporting steel plate 321 to form a whole, as shown in FIG. Figure 4 As shown; a plurality of reserved holes 3131 are provided on the connecting plate 313, and the connecting plate 313 is fixedly connected to the controlled column 1 by bolts.

[0029] like Figure 5-7As shown, the particle damper 2 is a sealed structure comprising an outer plate 21, an inner plate 22, a front plate 23, and a rear plate. These plates divide the particle damper 2 into a sealed chamber 25 and an interlayer 26. The sealed chamber 25 is filled with liquid. Within the interlayer 26 are several partitions 261, which divide the interlayer 26 into several buffer spaces filled with damping particles 262. The filling rate of the damping particles 262 in the buffer spaces is 40%-85%. A liquid partition 253 is located in the middle of the particle damper 2, dividing the sealed chamber 25 into a first chamber 251 and a second chamber 252. The first and second chambers 251, 252 each contain a different liquid with significantly different densities. An energy dissipation layer 5 is located between the support mechanism 3 and the particle damper 2. The energy dissipation layer 5 is fixedly attached to the inner wall of the support mechanism 3 via adhesive.

[0030] When the controlled column 1 vibrates, the liquid in the first cavity 251 and the second cavity 252 in the particle damper 2 shakes, so that the two liquids with different densities can cause the first cavity 251 and the second cavity 252 to generate inertial force and rotate under the action of vibration, thereby driving the damping particles 262 to generate collision friction energy consumption in the buffer space. At the same time, the particle damper 2 is connected to the supporting mechanism 3 through the spring 4. The particle damper 2 utilizes the restoring force of the spring to continuously and repeatedly rub against the energy consumption layer 5 during the rotation process to consume energy, further absorbing the vertical vibration energy of the controlled column 1, multiple-times releasing the vibration energy of the controlled column, and improving the safety of the structure.

Claims

1. A shock-absorbing column with a particle damper, characterized in that: The invention comprises a controlled column (1), a particle damper (2), and a supporting mechanism (3), wherein the supporting mechanism (3) is fixedly connected to the controlled column (1), and the bottom of the particle damper (2) is connected to the supporting mechanism (3) via a spring (4). The particle damper (2) is a sealed body, comprising an outer plate (21), an inner plate (22), a front end plate (23), and a rear end plate. The outer plate (21), the inner plate (22), the front end plate (23), and the rear end plate divide the particle damper (2) into a sealed cavity (25) and an interlayer (26), wherein the sealed cavity (25) is filled with liquid, and the interlayer (26) is provided with A plurality of partitions (261) are provided, wherein the partitions (261) divide the interlayer (26) into a plurality of buffer spaces filled with damping particles (262); a liquid partition (253) is provided in the middle of the particle damper (2) for dividing the sealed cavity (25) into a first cavity (251) and a second cavity (252); the first cavity (251) and the second cavity (252) are respectively filled with different liquids with significantly different liquid densities and / or volumes; an energy dissipation layer (5) is provided between the supporting mechanism (3) and the particle damper (2); the energy dissipation layer (5) is fixedly connected to the inner wall of the supporting mechanism (3).

2. A shock-absorbing column with a particle damper according to claim 1, characterized in that: The supporting mechanism (3) comprises a steel support (31) and a supporting steel plate (32); the steel support (31) is a welded integral steel component, comprising a bottom plate (311), a side plate (312) and a connecting plate (313); the supporting steel plate (32) comprises a first supporting steel plate (321) and a second supporting steel plate (322); the first supporting steel plate (321) is arranged in pairs and is welded to the side plate (312) and the connecting plate (313) to form a whole, and the second supporting steel plate (322) is welded to the first supporting steel plate (321) to form a whole; and the connecting plate (313) is fixedly connected to the controlled column (1).

3. A shock-absorbing column with a particle damper according to claim 2, characterized in that: The energy dissipation layer (5) is connected to the inner wall of the second supporting steel plate (322) via an adhesive.

4. The shock-absorbing column with a particle damper according to claim 1, characterized in that: The damping particles (262) are spheres of uniform size.

5. The shock-absorbing column with a particle damper according to claim 1, characterized in that: The filling rate of the damping particles (262) in the buffer space is between 40% and 85%.

6. The shock-absorbing column with a particle damper according to claim 1, characterized in that: The controlled column (1) is a steel column, a concrete column or a steel-concrete composite column.

7. The shock-absorbing column with a particle damper according to claim 1, characterized in that: A plurality of particle dampers (2) are arranged in a vertical direction on the side of the controlled column (1).

8. The shock-absorbing column with a particle damper according to claim 2, characterized in that: The connecting plate (313) is provided with a plurality of reserved holes (3131), and the connecting plate (313) is fixedly connected to the controlled column (1) by means of bolts.

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