A multi-stage dynamic damping device for columns of superstructures

Abstract

The present invention relates to a multi-stage dynamic damping device (1) for a column of a roof structure. The multi-stage dynamic damping device (1) comprises a rigid mounting base assembly (2), a multi-dimensional elastic body (3), a multi-dimensional power carrier (4) and a constrained protective layer (5); the device is characterized in that: a plurality of groups of multi-dimensional resonance units are provided on the column (6) below the roof structure, each group of multi-dimensional resonance units is composed of a constrained protective layer (5) covering a plurality of multi-dimensional power carriers (4) and a multi-dimensional elastic body (3) flexibly connected to the rigid mounting base assembly (2), and the multi-dimensional elastic body (3) and the multi-dimensional power carrier (4) are mounted on the rigid mounting base assembly (2). Compared with the prior art, the present invention greatly reduces the vibration energy input transmitted to the roof structure through the column due to track vibration, reduces the excitation of the train from the source, and controls the ground vibration on the roof and the secondary structure noise caused by structural vibration.

Description

Technical Field

[0001] The present invention 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 superstructured properties, and specifically relates to a multi-stage dynamic damping device for superstructured property columns. Background Art

[0002] As infrastructure for comprehensive maintenance, cleaning, and dispatching of urban rail transit vehicles, the depot occupies a large area. To conserve land resources and improve land utilization, the development of properties above the depot is centered around the transportation hub, developing comprehensive service functions, including administrative offices, business offices, commercial services, leisure and entertainment, and residential facilities. To meet environmental vibration and noise pollution limits, appropriate measures must be taken to reduce the environmental impact of vibration and secondary noise caused by vehicles entering and exiting the depot on the above-ground buildings.

[0003] When subway trains enter and exit the depot for routine parking and periodic maintenance, the line within the area splits into dozens of branches, forcing them to pass through an area with numerous branch tracks, known as a "throat zone." This area features curved tracks, numerous track joints, and relatively high train speeds, resulting in significant train-induced vibration. Furthermore, new and post-maintenance trains also travel at high speeds on the test line during system commissioning and performance testing, generating significant vibration. These vibrations have a wide peak frequency range, primarily between 20 and 80 Hz. These vibrations propagate through the trackbed, columns, and decking to the structures above. Because the columns and decking are made of reinforced concrete, their rigid connections directly transmit vibrations, resulting in low structural damping and slow vibration attenuation, causing vibrations in the structure and components. While unlike the intense vibrations in buildings caused by earthquakes, train-induced vibrations generally do not pose safety risks to the structure, but vibrations in the structures above often cause discomfort to those working and living there, impacting work efficiency and quality of life, and thus reducing the building's comfort. For example, if appropriate vibration isolation measures are not taken for the rail system of the vehicle depot, when the train passes through the throat area at a speed of only 10 to 20 km / h, the ground vibration of the residential building directly above it may reach over 85dB, far exceeding the environmental protection requirement of 62 to 75dB (the limit values ​​vary in different areas and time periods).

[0004] Patent CN215367950U discloses a vibration-damping column for a rail transit covered depot, which is characterized by a vibration damper arranged between the upper and lower parts of the rail support column of the inspection pit track to isolate the high-frequency vibration of the track, such as above 50Hz, from being transmitted to the foundation. On the one hand, it cannot solve the low-frequency vibration transmitted to the foundation by the track system. On the other hand, this vibration-damping column can only be used in the low-speed maintenance line section within the depot, and cannot be applied to the throat area or test line with severe vibration, and it does not solve the vibration problem of the column of the cover structure.

[0005] CN113684940A discloses a vibration-damping structure for existing buildings that can reduce subway vibrations. A vibration-damping reinforcement layer is laid beneath the substructure. The reinforcement layer, from bottom to top, consists of a rubber layer, a reinforced concrete layer, and a decorative layer. The vibration isolation frequency is designed to be 50-100 Hz. However, in practice, both integral and gravel track systems utilize elastic fasteners to secure rails. The vibration isolation frequency is generally 20-40 Hz, capable of isolating high-frequency vibrations above 50 Hz. Existing track pads installed beneath the track bed or gravel (similar to the invention application CN11368940A) have a vibration isolation frequency designed to be 10-20 Hz, capable of isolating track vibrations above 30 Hz. The vibration isolation pads only require a limited area beneath the track. CN113684940A also discloses the use of a TMD (Tuned Mass Damper) vibration damping device to control low-frequency vibrations between 0 and 30 Hz. However, the disclosed TMD is only a single-order harmonic mass damper with a single direction. Rail vehicles passing through the line contain many broadband excitations and multi-order modal resonance frequencies of the "vehicle-track" multi-degree-of-freedom complex system. Wheel-rail excitations include track unevenness, wheel eccentricity, wheel polygons, rail wave wear, fasteners passing through discontinuous supports, bogie axle pairs, bogie passing, etc. These frequencies are related to vehicle speed. Therefore, under such complex conditions and the variable speed of the vehicle depot, the track vibration frequency has a very wide range. Single-order harmonic mass dampers cannot meet the control requirements of broadband vibration sources. Summary of the Invention

[0006] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a multi-stage dynamic damping device for the columns of the upper cover property that can effectively solve the environmental vibration and secondary structure noise of the upper cover property.

[0007] The objectives of the present invention can be achieved through the following technical solutions: a multi-stage dynamic damping device for the upper cover property column, comprising a rigid mounting base assembly, a multidimensional elastomer, a multidimensional power carrier and a constraint protection layer; a plurality of groups of multidimensional resonance units are provided on the lower column of the upper cover property, each group of multidimensional resonance units is composed of a constraint protection layer covering a plurality of multidimensional power carriers and a multidimensional elastomer flexibly connected to the rigid mounting base assembly, the multidimensional elastomer has elastic stiffness in more than two directions of tension, compression and shear, the multidimensional elastomer and the multidimensional power carrier are installed on the rigid mounting base assembly; the multidimensional power carrier has an equivalent translational mass and an equivalent rotational inertia in more than two directions of vertical and horizontal directions.

[0008] The rigid mounting base assembly is connected to the upper cover property lower column through anchor bolts or connecting structure; the constraint protection layer covers the multi-dimensional power carrier and the multi-dimensional elastomer and is flexibly connected to the rigid mounting base assembly to form a multi-stage dynamic damping device.

[0009] Furthermore, the multi-order dynamic damping device is composed of more than two multi-dimensional elastomers and multi-dimensional power carriers. Each group of multi-dimensional elastomers and multi-dimensional power carriers constitutes an independent multi-dimensional resonance unit. The resonant frequency band range of the multi-order dynamic damping device is a wide band or multiple segmented frequency bands with a certain bandwidth, and the resonant frequency band range is 1-80Hz.

[0010] Furthermore, the resonant frequency band range of the multi-order dynamic damping device is adjusted by 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 power carrier, and the resonant frequency in each direction or position satisfies the formula f ij =By flexibly connecting or bonding the multi-dimensional power carrier and adjusting the position and mass of the multi-dimensional power carrier, the elastic stiffness of the multi-dimensional elastomer in different directions is adjusted.

[0011] The multidimensional elastomer is flexibly connected or bonded to the multidimensional power carrier, and the elastic stiffness of the multidimensional elastomer in different directions is adjusted by adjusting the position and mass of the multidimensional power carrier.

[0012] Furthermore, the multidimensional elastomer is arranged between the multidimensional power carrier and the rigid mounting base assembly to constitute a multidimensional resonance. The multidimensional resonance is achieved by a multidimensional elastomer with elastic stiffness in more than two directions through a multidimensional power carrier to realize resonant modes in more than two directions. The resonant modes in more than two directions include three translational modes and three torsional modes or a combination of their different modes.

[0013] Furthermore, the rigid mounting base assembly bears the gravity and resonant dynamic force of two or more multidimensional elastic bodies and multidimensional power carrier assemblies, and the weight bearing capacity of each assembly is not less than 100kg, and the resonant dynamic force bearing capacity is not less than 1kN.

[0014] Furthermore, the rigid mounting base assembly is provided with an elastic limit support, which is fixed to the rigid mounting base assembly by a mounting frame. The stiffness of the elastic limit support installation is less than 1 / 3 of the vertical stiffness of the multi-dimensional elastomer. A limit gap is left between the elastic limit support and the multi-dimensional power carrier, and the limit gap is greater than or equal to 0 mm.

[0015] Furthermore, the rigid mounting base assembly is connected to the outer side of the upper middle part of the column under the upper cover property through anchor bolts or a connecting structure, and the multi-stage dynamic damping device is distributed at different positions on the outer side of the column. The column includes a square or rectangular cross-section column or a circular cross-section column.

[0016] Furthermore, the constraint protection layer is made of a metal or non-metal plate material or mesh material or coating, and the constraint protection layer constrains multiple multi-dimensional power carriers and multi-dimensional elastomer assemblies.

[0017] Furthermore, the multidimensional elastic body of the multi-stage dynamic damping device can be made of rubber material, elastic composite material or spring steel material, the elastic stiffness of the multidimensional elastic body is complex stiffness, and its damping coefficient is not less than 0.001.

[0018] Furthermore, the material of the multidimensional power carrier of the multi-order dynamic damping device can be metal or non-metal or cement or composite material, the structure of the multidimensional power carrier can be a composite damping structure, the composite damping structure includes a damping constraint layer and a mass layer or a cavity structure containing a damping material, and the damping material can be a viscoelastic material or damping particles.

[0019] The multi-stage dynamic damping device for columns of the present invention is used to absorb vibration energy generated by the entry and exit of vehicles or during test runs in a rail transit depot, which is transmitted to the column vibrations of the supporting structure. This greatly reduces the tension, compression, bending, torsion, and instability vibrations of the compressed columns caused by track excitation, and the vibration energy input transmitted to the structure through the columns. This reduces the excitation of the train at the source to control the ground vibration on the structure and the secondary structure noise caused by structural vibration. Compared with traditional dynamic damping devices, the resonant frequency of the multi-stage dynamic damping device for columns of the present invention includes the multi-stage excitation frequency under vehicle operating conditions and the inherent characteristic frequency of the track structure under vehicle load conditions, thereby solving the problem of wide-band vibration excitation of the structure of the structure, especially the multi-modal complex structure of high-rise buildings.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. This invention addresses the source of the transmission of track vibrations to the superstructure caused by trains entering and exiting the rail depot and test line operation. By controlling the vibration energy of the substructure support columns near the track bed, this significantly reduces the requirements for substructure vibration isolation measures, their complexity, and the additional maintenance required. Prioritizing or focusing on the structural columns at the source of vibration excitation transmission to the superstructure is more effective and economical. This invention utilizes a multi-stage dynamic damping device for the superstructure columns to reduce column vibration levels.

[0022] 2. Under the conditions of variable speeds in the depot, the track vibration frequency has a very wide range, and vibration control technology needs to cover a wide frequency band. At the same time, the depot tracks and superstructures are complexly distributed. Vibration excitations at different locations and directions will affect the ground vibration within the building and the secondary noise radiated by vibrations of different building structures, including floors, walls, and ceilings. The multi-order and multi-dimensional dynamic damping device of the present invention is characterized by a wide-band dynamic damping vibration reduction device that can cover the frequency range of 1-80Hz.

[0023] 3. The present invention has a simple structure and is easy to implement. It can be directly applied to existing under-cover columns or directly introduced into the design of new columns. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of Example 1.

[0025] Figure 2 This is a schematic top-down cross-sectional view of the structure of Example 1.

[0026] Figure 3 This is a schematic top-down cross-sectional view of the structure of Example 2.

[0027] Figure 4 This is a structural diagram of Example 3.

[0028] Figure 5 This is a structural diagram of Example 3.

[0029] Figure numerals: 1. Multi-stage dynamic damping device, 2. Mounting base assembly, 21. Elastic limit support, 22. Mounting frame, 23. Connection structure, 3. Multi-dimensional elastomer, 4. Multi-dimensional power carrier, 41. Cavity structure, 42. Damping material, 5. Constraint protection layer, 6. Column. DETAILED DESCRIPTION

[0030] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0031] Example 1

[0032] A multi-stage dynamic damping device for columns of upper buildings, such as Figure 1 As shown, the multi-stage dynamic damping device 1 includes a rigid mounting base assembly 2, a multidimensional elastomer 3, a multidimensional power carrier 4 and a constraint protection layer 5; the multidimensional elastomer 3 has elastic stiffness in six directions, three translations and three torsions, and the multidimensional elastomer 3 is connected to the multidimensional power carrier 4 through an anchoring thread by a screw vulcanized in the elastomer; the multidimensional power carrier 4 has three-direction translation equivalent mass and three torsional equivalent rotational inertia; the rigid mounting base assembly 2 is connected to the upper cover property cover column 6 through an anchoring bolt connection structure; the constraint protection layer 5 is an anti-corrosion coating covering the multidimensional power carrier 4 and the multidimensional elastomer 3 and the rigid mounting base assembly 2 flexibly connected to form a multi-stage dynamic damping device.

[0033] The multi-stage dynamic damping device 1 is composed of four multi-dimensional elastic bodies 3 and a multi-dimensional power carrier 4. Figure 2 The top view cross-sectional schematic diagram is suitable for rectangular cross-section columns. Each group of multi-dimensional elastomers 3 and multi-dimensional power carriers 4 constitutes an independent multi-dimensional resonance unit. The resonant frequency band range of the multi-order dynamic damping device 1 is a wide band or multiple segmented frequency bands with a certain bandwidth, and the resonant frequency band range is 20-60Hz.

[0034] The multidimensional elastomer 3 is arranged between the multidimensional power carrier 4 and the rigid mounting base assembly 2 to constitute a multidimensional resonance. The multidimensional resonance is achieved by the multidimensional elastomer 3 with elastic stiffness in two or more directions through the multidimensional power carrier 4 to realize two six-direction resonant modes. The six-direction resonant modes include three translational modes and three torsional modes to form a combination of different modes.

[0035] The rigid mounting base assembly 2 bears the gravity and resonant dynamic force of a combination of two or more multidimensional elastic bodies 3 and multidimensional power carriers 4. The weight bearing capacity of each combination is not less than 100 kg, and the resonant dynamic force bearing capacity is not less than 1 kN.

[0036] The rigid mounting base assembly 2 is provided with an elastic limit support 21, and the elastic limit support 21 is fixed to the rigid mounting base assembly 2 by a mounting frame 22. The installation stiffness of the elastic limit support 21 is less than 1 / 3 of the vertical stiffness of the multidimensional elastomer 3. A limit gap is left between the elastic limit support 21 and the multidimensional power carrier 4, and the limit gap is greater than or equal to 5 mm.

[0037] The rigid mounting base assembly 2 is connected to the outer side of the upper part of the column 6 under the upper cover of the property through an anchor bolt connection structure 23, and the multi-stage dynamic damping device 1 is distributed at different positions on the outside of the column 6. The column 6 includes a square or rectangular cross-section column.

[0038] The constrained protective layer 5 is made of a composite insulating anti-corrosion coating and constrains the combination of multiple multi-dimensional power carriers 4 and multi-dimensional elastic bodies 3. The multi-dimensional elastic bodies 3 of the multi-stage dynamic damping device 1 can be made of a 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.

[0039] The multi-dimensional power carrier 4 of the multi-stage dynamic damping device 1 is made of reinforced concrete.

[0040] The resonant frequency band of the multi-stage dynamic damping device 1 is adjusted by the translational stiffness or torsional stiffness of the multi-dimensional elastic body 3 and the translational equivalent mass and equivalent moment of inertia of the multi-dimensional power carrier 4. The resonant frequency in each direction or position satisfies the formula f ij =(k ij / m ij ) 0.5 / (2π),kij is the translational stiffness or torsional stiffness of the i-th order and j-th dimension, m ij is the equivalent mass or equivalent moment of inertia of the i-th order and j-th dimension, f ij It is the resonant frequency of the i-th order and j-th dimension. Four sets of multi-order dynamic damping devices on each column form a wide frequency band of 20-60 Hz.

[0041] Example 2

[0042] like Figure 3 As shown, this embodiment provides a multi-stage dynamic damping device for the upper property column, and its basic structure is the same as that of Example 1, except that the rigid mounting base assembly 2 and the corresponding multi-dimensional elastic body 3 and the multi-dimensional power carrier 4 are curved and suitable for columns with circular cross-sections, and the rigid mounting base assembly 2 is connected to the upper property column 6 through an anchor bolt connection structure.

[0043] Example 3

[0044] like Figure 4 As shown, this embodiment provides a multi-stage dynamic damping device for the columns of the upper property, and its basic structure is the same as that of Example 2, the difference being that the rigid mounting base assembly 2 is designed as a clamp type suitable for connection with circular columns or square or rectangular columns 6.

[0045] Example 4

[0046] like Figure 5 As shown, this embodiment provides a multi-stage dynamic damping device for the columns of the roof property. Its basic structure is the same as that of Example 1, and the difference is that the multi-dimensional power carrier 4 is a reinforced concrete matrix designed with a cavity structure 41, and the cavity is filled with stone and sand damping material 42 to form a composite damping multi-dimensional power carrier.

[0047] The present invention can greatly reduce the low-frequency 1-80 Hz wide-band multi-peak vibration of the columns under the vehicle depot excitation cover, and effectively control the vibration level at the source of vibration excitation propagation of the building above the cover.

[0048] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A multi-stage dynamic damping device for a column of a roof structure, the multi-stage dynamic damping device (1) comprising a rigid mounting base assembly (2), a multi-dimensional elastic body (3), a multi-dimensional dynamic carrier (4) and a constrained protective layer (5); characterized in that: A plurality of groups of multi-dimensional resonance units are provided on the upper cover property lower column (6), each group of multi-dimensional resonance units is composed of a constraint protection layer (5) covering a plurality of multi-dimensional power carriers (4) and a multi-dimensional elastic body (3) flexibly connected to a rigid mounting base component (2), the multi-dimensional elastic body (3) having elastic stiffness in more than two directions of tension, compression and shear, and the multi-dimensional elastic body (3) and the multi-dimensional power carrier (4) are installed on the rigid mounting base component (2); the multi-dimensional power carrier (4) has an equivalent translational mass and an equivalent moment of inertia in more than two directions of vertical and horizontal directions; The multi-stage dynamic damping device (1) includes multiple groups of independent multi-dimensional resonance units, each group of independent multi-dimensional resonance units includes two or more multi-dimensional elastic bodies (3) and a multi-dimensional power carrier (4), and the resonance frequency band range of the multi-stage dynamic damping device (1) is a wide frequency band or multiple segmented frequency bands with a certain bandwidth, and the resonance frequency band range is 1-80 Hz; The resonant frequency band of the multi-stage dynamic damping device (1) is adjusted by the translational stiffness or torsional stiffness of the multi-dimensional elastic body (3) and the translational equivalent mass and equivalent moment of inertia of the multi-dimensional dynamic carrier (4), and the resonant frequency in each direction or position 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 j-th dimension, m ij is the equivalent mass or equivalent moment of inertia of the i-th order and j-th dimension, f ij is the resonant frequency of the i-th order and j-th dimension.

2. The multi-stage dynamic damping device for columns of a roof structure according to claim 1 is characterized in that: The multidimensional elastic body (3) is flexibly connected or bonded to the multidimensional power carrier (4), and the elastic stiffness of the multidimensional elastic body (3) in different directions is adjusted by adjusting the position and mass of the multidimensional power carrier (4).

3. The multi-stage dynamic damping device for columns of a roof structure according to claim 1 is characterized in that: The multidimensional elastic body (3) is arranged between the multidimensional power carrier (4) and the rigid mounting base assembly (2), forming a multidimensional resonance unit. The multidimensional resonance unit is composed of a multidimensional elastic body (3) with elastic stiffness in two or more directions, which realizes resonance modes in two or more directions through the multidimensional power carrier (4). The resonance modes in two or more directions include three translation modes and three torsional modes or a combination of different modes thereof.

4. The multi-stage dynamic damping device for columns of a roof structure according to claim 1 is characterized in that: The rigid mounting base assembly (2) bears the gravity and resonant dynamic force of a combination of two or more multi-dimensional elastic bodies (3) and a multi-dimensional power carrier (4), and the weight bearing capacity of each combination is not less than 100 kg, and the resonant dynamic force bearing capacity is not less than 1 kN.

5. The multi-stage dynamic damping device for columns of a roof structure according to claim 1 is characterized in that: The rigid mounting base assembly (2) is provided with an elastic limit support (21), which is fixed to the rigid mounting base assembly (2) by a mounting frame (22). The rigidity of the elastic limit support (21) is less than 1 / 3 of the vertical rigidity of the multi-dimensional elastic body (3). A limit gap is left between the elastic limit support (21) and the multi-dimensional power carrier (4), and the limit gap is greater than or equal to 0 mm.

6. The multi-stage dynamic damping device for columns of a roof structure according to claim 1 is characterized in that: The rigid mounting base assembly (2) is connected to the outer side of the upper middle portion of the column (6) under the upper cover by means of anchor bolts or a connecting structure (23), and the multi-stage dynamic damping device (1) is distributed at different positions on the outer side of the column (6), and the column (6) includes a square or rectangular cross-section column or a circular cross-section column.

7. The multi-stage dynamic damping device for columns of a roof structure according to claim 1 is characterized in that: The restraining protective layer (5) is made of a metal or non-metal plate material or a mesh material or a coating, and the restraining protective layer (5) restrains a combination of multiple multi-dimensional power carriers (4) and multi-dimensional elastic bodies (3).

8. The multi-stage dynamic damping device (1) according to claim 1, characterized in that: The multidimensional elastic body (3) is made of a rubber material, an elastic composite material, or a spring steel material. The elastic stiffness of the multidimensional elastic body (3) is complex stiffness, and its damping coefficient is not less than 0.

001. The material of the multidimensional power carrier (4) is metal or non-metal, the structure of the multidimensional power carrier (4) is a composite damping structure, the composite damping structure includes a damping constraint layer and a mass layer or a cavity structure including a damping material, and the damping material is a viscoelastic material or damping particles.

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