CN218117400U - Multi-stage dynamic damping device for superstructure property column - Google Patents

Abstract

The utility model relates to a multi-stage dynamic damping device (1) for an upper property column. The multi-stage dynamic damping device (1) includes a rigid mounting base component (2), a multi-dimensional elastic body (3), a multi-dimensional power The carrier (4) and the constraining protective layer (5); the upper cover property and the lower column (6) are provided with multiple sets of multi-dimensional resonant units, and each set of multi-dimensional resonant units is covered by the constrained protective layer (5) with multiple multi-dimensional The power carrier (4) and the multi-dimensional elastic body (3) are flexibly connected to the rigid mounting base component (2), and the multi-dimensional elastic body (3) and the multi-dimensional power carrier (4) are installed on the rigid mounting base component (2) . Compared with the prior art, the utility model greatly reduces the vibration energy input transmitted to the superstructure structure through the column caused by the track vibration, and reduces the excitation of the train from the source to control the ground vibration on the cover and the vibration caused by the structure vibration. secondary structure noise.

Description

Multi-stage dynamic damping device for superstructure property column

technical field

The utility model belongs to the technical field of rail transit environmental vibration and noise control, in particular to the control of environmental vibration and secondary structure noise of superstructure properties, and specifically relates to a multi-stage dynamic damping device for superstructure property columns.

Background technique

As the infrastructure for the comprehensive maintenance, cleaning and dispatching of urban rail transit vehicles, the vehicle depot covers a large area. In order to save land resources and improve land utilization, the property development of the vehicle depot is centered on the transportation hub and develops comprehensive service functions. Including administrative office, business office, business service, leisure and entertainment, residence and other functions. In order to meet the requirements of environmental vibration and noise pollution restrictions, appropriate measures should be taken to reduce the environmental impact of vibration on the building above the vibration and secondary noise caused by vehicles entering and exiting the depot.

When subway trains enter and leave the depot for daily parking and regular maintenance operations, the lines in the area are divided into dozens of strands by two strands, so they have to pass through an area with many forks, that is, the throat area. The line here is curved, there are many track joints, the speed of the vehicle is relatively high, and the vibration caused by the train is relatively large. In addition, when new trains and overhauled trains undergo system debugging and performance tests on the test line, the speed is also relatively high, which will also generate relatively large vibrations. The peak frequency range of these vibrations is wide, mainly between 20 and 80 Hz. These vibrations are transmitted to the buildings on the cover through the track bed, columns and cover plates. Since the materials of the columns and cover plates are reinforced concrete structures, the rigid connection directly transmits the vibration, and the structure damping is small and the vibration attenuation is slow. Although the vibration of the components is different from the strong vibration of the building under the action of the earthquake, the vibration caused by the train generally does not cause safety problems in the structure, but the vibration caused by the superstructure often brings serious problems to the people working and living in the building. Discomfort affects work efficiency and quality of life, thereby reducing the comfort performance of the building. For example, if proper vibration isolation measures are not taken for the depot track system, when the train passes through the throat area at a speed of only 10-20km/h, the ground vibration of the residential building directly above it may be as high as 85dB, which is far beyond the environmental protection 62 ~75dB (different limits in different regions and different time periods) requirements.

Patent CN215367950U discloses a vibration damping column on the upper cover of rail transit, which is characterized in that a shock absorber is arranged between the upper part and the lower part of the rail support column of the inspection pit, so as to isolate the transmission of high frequency vibration of the track, such as above 50 Hz, to the foundation On the one hand, it cannot solve the low-frequency vibration introduced into the foundation by the track system. On the other hand, this kind of vibration-damping column can only be used in the maintenance line section of the low-speed warehouse, and cannot be applied to the throat area or test run line with severe vibration, let alone solve the problem. The column vibration problem of the cover structure.

CN113684940A discloses a kind of existing building damping structure that can reduce the vibration of subway. A damping reinforcement layer is laid on the floor under the cover. The vibration damping reinforcement layer includes a rubber layer, a reinforced concrete layer and a decoration layer from bottom to top. The vibration isolation frequency The design is at 50-100Hz, but in practice, both the integral ballast bed and the gravel ballast bed use elastic fasteners to fix the rails, and the vibration isolation frequency is generally 20-40Hz, which can isolate high-frequency vibrations above 50Hz. The vibration isolation frequency of the track bed slab or the track mattress under the gravel (similar to CN11368940A utility model application) is designed at 10-20Hz, which can isolate the vibration above 30Hz. The vibration isolation pad only needs to be laid in a limited area under the line track . In addition, CN113684940A discloses the use of a TMD (Tuned Mass Damper) damping device to control 0-30 Hz low-frequency vibration, but the disclosed TMD is only a unidirectional single-order harmonic mass damper. The rail vehicle passing line contains a lot of broadband excitation and multi-order modal resonance frequency of the "vehicle-rail" multi-degree-of-freedom complex system. Wheel-rail excitation includes track irregularity, wheel eccentricity, wheel polygon, rail wave wear, passing discontinuity Supported fasteners, bogie axle pairs, bogie passing, etc. These frequencies are related to vehicle speed, so it is so complicated and the track vibration frequency is in a wide range under the condition of variable vehicle speed in the depot. Single-order harmonic mass damping The controller cannot satisfy the control of the broadband vibration source.

Utility model content

The purpose of this utility model is to provide a multi-stage dynamic damping device for the superstructure column that can effectively solve the environmental vibration and secondary structural noise of the superstructure in order to overcome the above-mentioned defects in the prior art.

The purpose of this utility model can be achieved through the following technical solutions: a multi-stage dynamic damping device for the property column of the upper cover, including a rigid mounting base assembly, a multi-dimensional elastic body, a multi-dimensional power carrier and a restraint protection layer; There are multiple sets of multi-dimensional resonant units on the lower column, and each set of multi-dimensional resonant units is composed of multiple multi-dimensional power carriers covered by a constrained protective layer and a multi-dimensional elastic body flexibly connected with a rigid mounting base component. The multi-dimensional elastic The body has elastic stiffness in more than two directions, such as tension and compression, and shearing. The multi-dimensional elastic body and the multi-dimensional power carrier are installed on the rigid installation base assembly; the multi-dimensional power carrier has more than two directions of vertical and horizontal etc. The effective translational mass and the equivalent moment of inertia.

The rigid mounting base component is connected to the upper and lower property cover columns through anchor bolts or connecting structures; the restraint protection layer covers the multi-dimensional power carrier and the multi-dimensional elastic body is flexibly connected with the rigid mounting base component to form a multi-order dynamic damping device.

Further, the multi-dimensional dynamic damping device is composed of more than two multi-dimensional elastic bodies and multi-dimensional power carriers, each group of multi-dimensional elastic bodies and multi-dimensional power carriers constitutes an independent multi-dimensional resonance unit, and the multi-dimensional dynamic The resonant frequency band range of the damping device is a wide frequency band or multiple segmented frequency bands with a certain bandwidth, and the resonant frequency band range is 1-80Hz.

Further, the resonant frequency band range of the multi-stage dynamic damping device is adjusted through the translational stiffness or torsional stiffness of the multi-dimensional elastic body and the translational equivalent mass and equivalent moment of inertia of the multi-dimensional dynamic carrier. The resonant frequency satisfies the formula f _ij = by flexibly connecting or bonding the multi-dimensional dynamic carrier, by adjusting the position and mass of the multi-dimensional dynamic carrier, the elastic stiffness of the multi-dimensional elastic body in different directions can be adjusted.

The multi-dimensional elastic body is flexibly connected or bonded to the multi-dimensional power carrier, and the elastic stiffness of the multi-dimensional elastic body in different directions is adjusted by adjusting the position and quality of the multi-dimensional power carrier.

Further, the multi-dimensional elastic body is arranged between the multi-dimensional power carrier and the rigid mounting base assembly to form a multi-dimensional resonance, and the multi-dimensional resonance is composed of a multi-dimensional elastic body with elastic stiffness in more than two directions through the multi-dimensional power carrier The resonant modes of more than two directions are realized, and the resonant modes of more than two directions include three translational modes and three torsional modes or a combination of different modes.

Further, the rigid mounting base assembly bears the gravity and resonant dynamic force of more than two multi-dimensional elastic bodies and multi-dimensional power carrier assemblies, the weight bearing capacity of each assembly is not less than 100kg, and the resonant dynamic force bears The capacity is not less than 1kN.

Further, the rigid installation base assembly is provided with an elastic limit support, the elastic limit support is fixed on the rigid installation base assembly by the mounting frame, and the rigidity of the elastic limit support installation is less than 1% of the vertical stiffness of the multi-dimensional elastic body /3, There is a limit gap between the elastic limit support and the multi-dimensional power carrier, and the limit gap is greater than or equal to 0mm.

Further, the rigid installation base assembly is connected to the outer side of the middle and upper part of the upright column under the upper cover property through anchor bolts or connecting structures, and the multi-stage dynamic damping devices are distributed at different positions outside the column, and the upright column includes square or Columns of rectangular section or columns of circular section.

Further, the constraining protective layer is made of metal or non-metallic sheet or mesh or coating, and the constrained protective layer constrains multiple multi-dimensional power carriers and multi-dimensional elastomer assemblies.

Further, the multi-dimensional elastic body of the multi-stage dynamic damping device can be made of rubber material or elastic composite material or spring steel material, the elastic stiffness of the multi-dimensional elastic body is complex stiffness, and its damping coefficient is not less than 0.001.

Further, the material of the multi-dimensional power carrier of the multi-stage dynamic damping device can be metal or non-metal or cement or composite material, the structure of the multi-dimensional power carrier can be a composite damping structure, and the composite damping The structure includes a damping constraint layer and a mass layer or a cavity structure including a damping material, and the damping material may be a viscoelastic material or damping particles.

The column multi-stage dynamic damping device of the utility model is used to absorb the vibration energy generated during the vehicle entry and exit of the rail transit depot or the test run process, which is transmitted to the column vibration of the building on the support cover, and greatly reduces the tension of the compressed column caused by the track excitation. Compression, bending, torsion and instability and other vibrations are transmitted to the superstructure through the columns to input vibration energy, and the excitation of the train is reduced from the source to control the ground vibration on the cover and the secondary structural noise caused by structural vibration. Compared with the traditional dynamic damping device, the resonance frequency of the column multi-stage dynamic damping device of the present utility model includes the multi-stage excitation frequency under the vehicle running condition and the natural characteristic frequency of the track structure under the vehicle load condition, thus solving the problem of covering the building Broadband vibration excitation of object structures, especially multi-mode complex structures of high-rise buildings.

Compared with the prior art, the utility model has the following advantages:

1. The utility model considers the source of the excitation transmission path of the superstructure building caused by the track vibration caused by the train entering and exiting the rail transit depot and the test run line, and controls the vibration energy of the cover plate supporting column close to the track bed under the cover, which can be greatly improved. To reduce the requirements of the ballast bed vibration isolation measures and its complexity and additional maintenance work, it is more effective and economical to control the vibration level from the structural columns on the building vibration excitation transmission source on the cover. The utility model is a multi-stage dynamic damping device for the vertical column of the upper cover property to reduce the vibration level of the vertical column.

2. Under the condition of changing vehicle speed in the depot, the vibration frequency of the track is in a very wide range. The vibration control technology needs to cover a wide frequency range. At the same time, the distribution of the track and the superstructure of the depot is complex. The vibration excitation in different positions and directions will affect the building. The ground vibration in the building and the secondary noise radiated by different structures of the building including the vibration of the floor, wall, and ceiling. The multi-stage multi-dimensional dynamic damping device of the present invention is characterized by a broadband dynamic damping and vibration reduction device, which can cover frequency band 1 -80Hz.

3. The utility model is simple in structure and easy to implement. It can be directly implemented and applied on the existing under-cover column, and can also be directly introduced into the design of a new column.

Description of drawings

Fig. 1 is the structural representation of embodiment 1.

FIG. 2 is a schematic top view cross-sectional view of the structure of Embodiment 1. FIG.

FIG. 3 is a schematic top view cross-sectional view of the structure of Embodiment 2. FIG.

Figure 4 is a schematic structural view of Embodiment 3.

FIG. 5 is a schematic structural view of Embodiment 3.

Reference signs: 1. Multi-stage dynamic damping device, 2. Installation base assembly, 21. Elastic limit support, 22. Mounting frame, 23. Connection structure, 3. Multi-dimensional elastic body, 4. Multi-dimensional power carrier, 41 . Cavity structure, 42. Damping material, 5. Constrained protective layer, 6. Column.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the utility model, and the detailed implementation and specific operation process are given, but the protection scope of the utility model is not limited to the following examples.

Example 1

A multi-stage dynamic damping device for a superstructure property column, as shown in Figure 1, the multi-stage dynamic damping device 1 includes a rigid mounting base assembly 2, a multi-dimensional elastic body 3, a multi-dimensional dynamic carrier 4 and a restraint protection layer 5. The multi-dimensional elastic body 3 has elastic stiffness in six directions, three translations and three torsional movements, and the multi-dimensional elastic body 3 is connected with the multi-dimensional power carrier 4 through the anchor thread through the screw rod vulcanized in the elastic body Installed on the rigid mounting base assembly 2; the multi-dimensional power carrier 4 has translational equivalent mass in three directions and three torsion equivalent moments of inertia; the rigid mounting base assembly 2 is connected with the upper cover and the lower column 6 is connected by an anchor bolt connection structure; the constrained protective layer 5 is a multi-dimensional power carrier 4 coated with an anti-corrosion coating, and the multi-dimensional elastic body 3 is flexibly connected with the rigid installation base component 2 to form a multi-stage dynamic damping device.

The multi-stage dynamic damping device 1 is composed of four multi-dimensional elastic bodies 3 and multi-dimensional power carriers 4, as shown in Fig. An independent multi-dimensional resonance unit is formed, and the resonance frequency range of the multi-stage dynamic damping device 1 is a wide frequency band or a plurality of segmented frequency bands with a certain bandwidth, and the resonance frequency range is 20-60 Hz.

The multi-dimensional elastic body 3 is arranged between the multi-dimensional power carrier 4 and the rigid mounting base assembly 2 to form a multi-dimensional resonance. The carrier 4 realizes resonance modes in two or six directions, and the resonance modes in six directions include three translational modes and three torsional modes to form a combination of different modes.

The rigid mounting base assembly 2 bears the gravity and resonance dynamic force of the combination of two or more multi-dimensional elastic bodies 3 and multi-dimensional power carriers 4. The weight bearing capacity of each combination is not less than 100kg, and the resonance dynamic force bears The capacity is not less than 1kN.

The rigid installation base assembly 2 is provided with an elastic limit support 21, and the elastic limit support 21 is fixed on the rigid installation base assembly 2 by a mounting frame 22. The installation rigidity of the elastic limit support 21 is less than that of the multi-dimensional elastomer 3 To 1/3 of the rigidity, there is a limit gap between the elastic limit support 21 and the multi-dimensional power carrier 4, and the limit gap is greater than or equal to 5mm.

The rigid installation base assembly 2 is connected to the outer side of the upper part of the upper column 6 under the upper property cover through the anchor bolt connection structure 23, and the multi-stage dynamic damping device 1 is distributed at different positions on the outer side of the column 6. The column 6 includes a square Or rectangular section columns.

The constraining protective layer 5 is made of a composite insulating anti-corrosion coating, and the constrained protective layer 5 constrains a combination of multiple multidimensional power carriers 4 and multidimensional elastic bodies 3 . The multi-dimensional elastic body 3 of the multi-stage dynamic damping device 1 can be made of rubber material, the elastic stiffness of the multi-dimensional elastic body 3 is complex stiffness, and its damping coefficient is not less than 0.05.

The material of the multi-dimensional power carrier 4 of the multi-stage dynamic damping device 1 is made of reinforced concrete.

The resonant frequency band range of the multi-stage dynamic damping device 1 is adjusted by the translational stiffness or torsional stiffness of the multidimensional elastic body 3 and the translational equivalent mass and equivalent moment of inertia of the multidimensional dynamic carrier 4. The resonance frequency satisfies the formula f _ij =(k _ij /m _ij ) ^0.5 /(2π), k _ij is the translational stiffness or torsional stiffness of the i-th order and the j-dimension, m _ij is the translational motion of the i-th order and the j-dimension, etc. Effective mass or equivalent moment of inertia, f _ij is the resonant frequency of the i-th order and the j-dimension, and four sets of multi-order dynamic damping devices for each column form a 20-60Hz wide frequency band.

Example 2

As shown in Figure 3, this embodiment provides a multi-stage dynamic damping device for the upper building property column. Its basic structure is the same as that of Embodiment 1, and its difference lies in: the rigid mounting base component 2 and the corresponding multi-dimensional elastic body 3 1. The multi-dimensional power carrier 4 has a curved shape and is suitable for a column with a circular cross section. The rigid installation base component 2 is connected to the column 6 under the upper property cover through an anchor bolt connection structure.

Example 3

As shown in Figure 4, this embodiment provides a multi-stage dynamic damping device for the upper building property column. Circular column or square or rectangular column 6 are connected.

Example 4

As shown in Figure 5, this embodiment provides a multi-stage dynamic damping device for the superstructure property column. Its basic structure is the same as that of Embodiment 1, and the difference is that the multi-dimensional dynamic carrier 4 is a reinforced concrete matrix designed with a cavity. In the structure 41, the cavity is filled with rock-sand damping material 42 to form a composite damping multi-dimensional power carrier.

The utility model can greatly reduce the low-frequency 1-80Hz wide-band multi-peak vibration of the column under the vehicle excitation cover in the depot, and effectively control the vibration level at the source of the vibration excitation transmission of the building on the cover.

The preferred specific embodiments of the present utility model have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the utility model without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection defined by the claims .

Claims (10)

1. A multi-stage dynamic damping device for a superstructure property column, the multi-stage dynamic damping device (1) includes a rigid mounting base assembly (2), a multi-dimensional elastic body (3), and a multi-dimensional power carrier (4) and a constrained protective layer (5); it is characterized in that: multiple groups of multi-dimensional resonant units are arranged on the upper column (6) of the property cover, and each group of multi-dimensional resonant units is covered with a plurality of multi-dimensional resonant units by the constrained protective layer (5) The power carrier (4) and the multi-dimensional elastic body (3) are flexibly connected to the rigid mounting base component (2), and the multi-dimensional elastic body (3) and the multi-dimensional power carrier (4) are installed on the rigid mounting base component (2) . 2. The multi-stage dynamic damping device for a superstructure property column according to claim 1, wherein the multi-stage dynamic damping device (1) includes multiple sets of independent multi-dimensional resonance units, and each set of independent The multi-dimensional resonance unit includes more than two multi-dimensional elastic bodies (3) and multi-dimensional power carriers (4). 3. A multi-stage dynamic damping device for superstructure property columns according to claim 1 or 2, characterized in that the multi-dimensional elastic body (3) has elastic stiffness in more than two directions of tension, compression and shearing ; The multi-dimensional power carrier (4) has an equivalent translational mass and an equivalent moment of inertia in both vertical and horizontal directions. 4. A multi-stage dynamic damping device for a superstructure property column according to claim 1 or 3, characterized in that the multi-dimensional elastic body (3) is flexibly connected or bonded to a multi-dimensional dynamic carrier (4) . 5. The multi-stage dynamic damping device for a superstructure property column according to claim 1, characterized in that, the multi-dimensional elastic body (3) is arranged between the multi-dimensional power carrier (4) and the rigid mounting base assembly ( 2) constitutes a multi-dimensional resonant unit. 6. A multi-stage dynamic damping device for superstructure property columns according to claim 1, characterized in that, the rigid mounting base assembly (2) carries more than two multi-dimensional elastic bodies (3) and multi-dimensional Power carrier (4) The gravity and resonant dynamic force of the combination, the weight bearing capacity of each combination is not less than 100kg, and the resonant dynamic force bearing capacity is not less than 1kN. 7. A multi-stage dynamic damping device for a superstructure property column according to claim 1, characterized in that, the rigid installation base component (2) is provided with an elastic limit support (21), and the elastic limit support (21) is fixed on the rigid mounting base assembly (2) by the mounting frame (22), the stiffness of the elastic limit support (21) is less than 1/3 of the vertical stiffness of the multi-dimensional elastic body (3), and the elastic limit support A limited gap is left between (21) and the multi-dimensional power carrier (4), and the limited gap is greater than or equal to 0mm. 8. A multi-stage dynamic damping device for a superstructure property column according to claim 1, characterized in that, the rigid installation base assembly (2) is connected to the superstructure property cover through anchor bolts or connecting structures (23) On the outside of the middle and upper part of the lower column (6), multi-stage dynamic damping devices (1) are distributed at different positions outside the column (6), and the column (6) includes a column with a square or rectangular section or a column with a circular section. 9. The multi-stage dynamic damping device for a superstructure property column according to claim 1, characterized in that, the constrained protective layer (5) is made of metal or non-metallic sheet or mesh or coating, constraining The protective layer (5) constrains the combination of multiple multidimensional power carriers (4) and multidimensional elastic body (3). 10. The multi-stage dynamic damping device (1) according to claim 1, characterized in that, the multi-dimensional elastic body (3) is made of rubber material or elastic composite material or spring steel material, and the multi-dimensional elastic body (3) The elastic stiffness is complex stiffness, and its damping coefficient is not less than 0.001; The material of the multi-dimensional power carrier (4) is metal or non-metal or cement or composite material, the structure of the multi-dimensional power carrier (4) is a composite damping structure, and the composite damping structure includes a damping constraint layer and a mass layer or a cavity structure containing a damping material, the damping material being a viscoelastic material or damping particles.

Images