CN218117400U - Multistage dynamic damping device of upper cover property stand - Google Patents
Multistage dynamic damping device of upper cover property stand Download PDFInfo
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- CN218117400U CN218117400U CN202221103555.5U CN202221103555U CN218117400U CN 218117400 U CN218117400 U CN 218117400U CN 202221103555 U CN202221103555 U CN 202221103555U CN 218117400 U CN218117400 U CN 218117400U
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Abstract
The utility model relates to a multi-step dynamic damping device (1) of an upper cover property upright post, which comprises a rigid mounting base component (2), a multi-dimensional elastomer (3), a multi-dimensional dynamic carrier (4) and a restraint protective layer (5); be equipped with multiunit multidimension degree resonance unit on upper cover property lid lower column (6), each multidimension degree resonance unit of group is by a plurality of multidimension degree power carrier (4) of restraint protective layer (5) cladding and multidimension degree elastomer (3) and rigid mounting base subassembly (2) flexonics constitutes, and multidimension degree elastomer (3) and multidimension degree power carrier (4) are installed on rigid mounting base subassembly (2). Compared with the prior art, the utility model discloses reduce widely because of the vibration energy input that the stand transmission that passes through that the track vibration arouses gives the upper cover building, the secondary structure noise that the excitation that reduces the train from the source comes the control to cover the ground vibration and arouse because of the structural vibration.
Description
Technical Field
The utility model belongs to the technical field of rail transit environment vibration noise control, especially upper cover property environmental vibration and secondary structure noise control, concretely relates to multistage dynamic damping device of upper cover property stand.
Background
The vehicle section is used as an infrastructure for comprehensive overhaul, cleaning and scheduling of urban rail transit vehicles, has large floor area, and is used for saving land resources and improving the land utilization rate, and the vehicle section covers a traffic hub for property development to develop comprehensive service functions, including functions of administrative office, business office, commercial service, leisure and entertainment, living and the like. In order to meet the requirements of environmental vibration and noise pollution limitation, proper measures need to be taken to reduce the environmental influence of vibration on covered buildings due to vibration and secondary noise caused by the vehicle entering and exiting vehicle sections.
When a subway train enters and exits a train section to perform daily parking and regular maintenance operation, a line in the section is divided into dozens of strands from two lines, so that the subway train passes through a region with more turnouts, namely a throat region. The track is bent, the number of track joints is large, the running speed is relatively high, and vibration caused by the train is large. In addition, the speed of a new train and a train after overhauling is higher when system debugging and performance test are carried out on a test run line, and larger vibration can be generated. The peak frequency range of these vibrations is broad, mainly between 20 and 80Hz. The vibration is transmitted to the building covered by the railway bed, the upright column and the cover plate through the way, because the upright column and the cover plate are made of reinforced concrete structures, the rigid connection of the upright column and the cover plate directly transmits the vibration, the structural damping is small, the vibration attenuation is slow, the vibration of the structure and the components is caused, although the vibration caused by the train is different from the strong vibration of the building under the action of an earthquake, the safety problem of the structure can not be caused generally, the vibration caused by the upper cover building can often bring discomfort to people working and living in the building, the working efficiency and the living quality are influenced, and the comfortable performance of the building is reduced. For example, if proper vibration isolation measures are not taken for the track system of the train section, when the train only passes through the throat area at the speed of 10-20 km/h, the ground vibration of the residential building right above the train can reach more than 85dB, which is far beyond the requirement of 62-75 dB (different time period limits of different areas) of environmental protection.
Patent CN215367950U discloses a vibration damping upright post for a rail transit upper cover yard, which is characterized in that a vibration damper is arranged between the upper part and the lower part of a rail supporting post of an inspection pit rail, so that the propagation of high-frequency vibration of a rail, such as vibration above 50Hz, to a foundation is isolated, on one hand, the low-frequency vibration transmitted into the foundation by a rail system cannot be solved, on the other hand, the vibration damping upright post can only be used in a low-speed in-warehouse maintenance line section, and cannot be applied to a throat area or a test run line with serious vibration, and the problem of upright post vibration of a cover structure cannot be solved.
CN113684940A discloses an existing building damping structure of reducible subway vibration, lay the damping enhancement layer at the lid lower floor layer, the damping enhancement layer includes rubber layer, reinforced concrete layer and fitment layer from bottom to top in proper order, the vibration isolation frequency design is at 50-100Hz, but in practice the rail system no matter is whole railway roadbed or rubble railway roadbed all adopts the fixed rail of elastic fastener, the vibration isolation frequency generally can keep apart the high frequency vibration more than 50Hz at 20-40Hz, and the vibration isolation frequency design of current track mattress (similar CN11368940A utility model application) of installing under track bed board or rubble is at 10-20Hz, can keep apart the vibration of track vibration more than 30Hz, the vibration isolation cushion only need be laid in the limited area under the circuit track. In addition, CN113684940A discloses controlling 0-30Hz low frequency vibration using a TMD (Tuned Mass Damper) damping device, but the disclosed TMD is only a single-directional single-order harmonic Mass Damper. The track vehicle passing line comprises a plurality of broadband excitations and multi-order modal resonance frequencies of a vehicle-track multi-degree-of-freedom complex system, the wheel-track excitations comprise track irregularity, wheel eccentricity, wheel polygon, steel rail wave abrasion, fasteners for discontinuous support, bogie wheel shaft pairs, bogie passing and the like, the frequencies are related to the vehicle speed, therefore, the track vibration frequency is in a wide range under the condition that the vehicle speed at the vehicle section is variable, and the single-order harmonic mass damper cannot meet the control of a broadband vibration source.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a multistage dynamic damping device of upper cover property stand that can effectively solve upper cover property environmental vibration and secondary structure noise in order to overcome the defect that above-mentioned prior art exists.
The purpose of the utility model can be realized by the following technical proposal: a multi-stage dynamic damping device for upper cover property columns comprises a rigid mounting base assembly, a multi-dimensional elastic body, a multi-dimensional dynamic carrier and a restraint protective layer; a plurality of groups of multi-dimensional resonance units are arranged on the lower stand column of the property cover of the upper cover, each group of multi-dimensional resonance units is formed by coating a plurality of multi-dimensional power carriers by a constraint protective layer and flexibly connecting a multi-dimensional elastic body with the rigid mounting base assembly, the multi-dimensional elastic body has elastic rigidity in more than two directions such as tension, compression and shearing, and the multi-dimensional elastic body and the multi-dimensional power carriers are mounted on the rigid mounting base assembly; the multi-dimensional power carrier has equivalent translation mass and equivalent rotational inertia in more than vertical and horizontal directions.
The rigid mounting base assembly is connected with the upper cover property cover lower upright post through an anchor bolt or a connecting structure; the restraint protective layer covers the multidimensional power carrier, the multidimensional elastic body and the rigid mounting base assembly, and the multi-order power damping device is formed by flexible connection.
Furthermore, the multi-order dynamic damping device is composed of more than two multi-dimensional elastic bodies and a multi-dimensional dynamic carrier, each group of multi-dimensional elastic bodies and the multi-dimensional dynamic carrier form an independent multi-dimensional resonance unit, the resonance frequency band range of the multi-order dynamic damping device is a wide frequency band or a plurality of segmented frequency bands with certain bandwidth, and the resonance frequency band range is 1-80Hz.
Furthermore, the resonance frequency band range of the multi-order dynamic damping device is adjusted through the translation rigidity or the torsion rigidity of the multi-dimensional elastomer and the translation equivalent mass and the equivalent rotational inertia of the multi-dimensional power carrier, and the resonance frequency in each direction or position meets the formula f ij = by flexibly connecting or bonding multidimensional power carrier, by adjusting position and mass of multidimensional power carrierAnd adjusting the elastic rigidity of the multi-dimensional elastic body in different directions.
The multi-dimensional elastic body is flexibly connected or bonded with the multi-dimensional power carrier, and the elastic rigidity of the multi-dimensional elastic body in different directions is adjusted by adjusting the position and the mass of the multi-dimensional power carrier.
Further, the multi-dimensional elastomer is arranged between the multi-dimensional power carrier and the rigid mounting base assembly to form multi-dimensional resonance, the multi-dimensional resonance realizes resonance modes in more than two directions through the multi-dimensional power carrier by the multi-dimensional elastomer with elastic rigidity in more than two directions, and the resonance modes in more than two directions comprise three translation modes and three torsion modes or combinations of different modes of the three translation modes and the three torsion modes.
Furthermore, the rigid mounting base assembly bears the gravity and harmonic vibration dynamic force of more than two multidimensional elastic bodies and multidimensional power carrier assemblies, the weight bearing capacity of each assembly is not lower than 100kg, and the resonance dynamic force bearing capacity is not smaller than 1kN.
Furthermore, an elastic limit support is arranged on the rigid mounting base assembly and fixed on the rigid mounting base assembly through a mounting frame, the rigidity of the elastic limit support is smaller than 1/3 of the vertical rigidity of the multidimensional elastic body, a limit gap is reserved between the elastic limit support and the multidimensional power carrier, and the limit gap is larger than or equal to 0mm.
Furthermore, the rigid mounting base assembly is connected to the outer side of the middle upper portion of the lower stand column of the upper cover property cover through an anchor bolt or a connecting structure, the multi-stage dynamic damping devices are distributed at different positions of the outer side of the stand column, and the stand column comprises a square or rectangular section stand column or a circular section stand column.
Further, the restraining and protecting layer is made of metal or nonmetal plates or meshes or coatings, and restrains a plurality of multi-dimensional power carriers and multi-dimensional elastomer assemblies.
Furthermore, the multidimensional elastic body of the multi-step dynamic damping device can be made of rubber materials, elastic composite materials or spring steel materials, the elastic stiffness of the multidimensional elastic body is complex stiffness, and the damping coefficient of the multidimensional elastic body is not less than 0.001.
Furthermore, the material of the multi-dimensional power carrier of the multi-step dynamic damping device can be metal or nonmetal or cement or composite material, the structure of the multi-dimensional power carrier can be a composite damping structure, the composite damping structure comprises a damping constraint layer and a mass layer or a cavity structure containing damping material, and the damping material can be viscoelastic material or damping particles.
The utility model discloses a multistage dynamic damping device of stand is used for absorbing the vibration energy that rail transit vehicle section vehicle came in and go out or the process of taking a trial run produced and spreads the stand vibration that the bearing covered the building, reduces widely because of the pressurized cylinder that the track excitation arouses draw pressure, bending, twist reverse vibration such as unstability and transmit the vibration energy input for the upper cover building through the stand, reduces the excitation of train from the source and controls the secondary structure noise that covers the ground vibration and arouse because of the structure vibration. Compare with traditional dynamic damping device, the utility model discloses a multistage dynamic damping device of stand its resonant frequency contains multistage excitation frequency and the natural eigen frequency of track structure under the vehicle load condition under the vehicle running condition to the solution covers the broadband vibration excitation of building structure especially high-rise building multimode complex structure.
Compared with the prior art, the utility model has the advantages of it is following:
1. the utility model discloses from track traffic vehicle section train warehouse entry and the track vibration that the circuit operation of taking a trial run arouses on the source of upper cover building excitation transmission path consider, the vibration energy of the apron supporting column of being close to the circuit railway roadbed under the control lid, can reduce the requirement of railway roadbed vibration isolation measure and complexity and extra maintenance work widely, priority or key follow control vibration level more effective and more economical to covering building vibration excitation propagation source structure stand. The utility model discloses a multistage dynamic damping device of upper cover property stand reduces the vibration level of stand.
2. Track vibration frequency is a very wide scope under the changeable condition of vehicle section speed of a motor vehicle, and the vibration control technique needs to cover the broadband scope, and vehicle section track and upper cover building distribution are complicated simultaneously, and the vibration excitation of different positions equidirectional vibration excitation all can influence the ground vibration in the building and the secondary noise that the different structures of building include floor, wall, ceiling vibration and radiation, the utility model discloses an its characteristic of multistage multidimension dynamic damping device is exactly broadband dynamic damping vibration damper, can cover frequency channel 1-80Hz.
3. The utility model discloses simple structure, it is convenient to implement, both can directly implement the application under current lid on the stand, also can directly introduce in the design of new stand.
Drawings
Fig. 1 is a schematic structural view of embodiment 1.
FIG. 2 is a schematic sectional view of the structure of example 1 in a top view.
Fig. 3 is a schematic sectional top view of the structure of example 2.
Fig. 4 is a schematic structural view of embodiment 3.
Fig. 5 is a schematic structural view of embodiment 3.
Reference numerals: 1. multistage dynamic damping device, 2, installation base subassembly, 21, the spacing supporting of elasticity, 22, mounting bracket, 23, connection structure, 3, multidimension degree elastomer, 4, multidimension degree power carrier, 41, cavity structure, 42, damping material, 5, restraint protective layer, 6, stand.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
A multi-step dynamic damping device of an upper cover property upright column is disclosed, as shown in figure 1, the multi-step 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 restraining protection layer 5; the multi-dimensional elastomer 3 has elastic rigidity in six directions, three translation and three torsion, and the multi-dimensional elastomer 3 is connected with a multi-dimensional power carrier 4 through an anchoring thread through a screw rod vulcanized in the elastomer and then is installed on the rigid installation base component 2; the multi-dimensional power carrier 4 has translational equivalent mass and torsional equivalent rotary inertia in three directions; the rigid mounting base assembly 2 is connected with the upper cover property cover lower upright post 6 through an anchoring bolt connecting structure; the restraint protective layer 5 is formed by flexibly connecting an anticorrosive coating coated with a multidimensional power carrier 4, a multidimensional elastic body 3 and a rigid mounting base assembly 2 to form a multi-stage power damping device.
The multi-step dynamic damping device 1 is composed of four multi-dimensional elastic bodies 3 and multi-dimensional power carriers 4, the cross section schematic diagram of the top view of fig. 2 is suitable for a rectangular cross section column, each group of multi-dimensional elastic bodies 3 and multi-dimensional power carriers 4 form an independent multi-dimensional resonance unit, the resonance frequency band range of the multi-step dynamic damping device 1 is a broadband or a plurality of segmented frequency bands with certain bandwidth, and the resonance frequency band range is 20-60Hz.
The multidimensional elastic body 3 is arranged between the multidimensional power carrier 4 and the rigid mounting base component 2 to form multidimensional resonance, the multidimensional resonance realizes two six-direction resonance modes through the multidimensional power carrier 4 by the elastic rigidity multidimensional elastic body 3 with more than two directions, and the six-direction resonance modes comprise three translation modes and three torsion modes to form combinations of different modes.
The rigid mounting base component 2 bears the gravity and harmonic vibration state force of more than two multidimensional elastic body 3 and multidimensional power carrier 4 combinations, the weight bearing capacity of each combination is not lower than 100kg, and the resonance dynamic force bearing capacity is not less than 1kN.
The rigid mounting base assembly 2 is provided with an elastic limiting support 21, the elastic limiting support 21 is fixed on the rigid mounting base assembly 2 through a mounting frame 22, the rigidity of the elastic limiting support 21 is less than 1/3 of the vertical rigidity of the multidimensional elastic body 3, a limiting gap is reserved between the elastic limiting support 21 and the multidimensional power carrier 4, and the limiting gap is larger than or equal to 5mm.
The rigid mounting base assembly 2 is connected to the outer side of the upper portion of the lower upright 6 of the upper cover property cover through an anchoring bolt connecting structure 23, the multi-stage dynamic damping devices 1 are distributed at different positions on the outer side of the upright 6, and the upright 6 comprises an upright with a square or rectangular cross section.
The restraint protective layer 5 is made of a composite insulating anticorrosive coating, and the restraint protective layer 5 restrains a plurality of multi-dimensional power carrier 4 and multi-dimensional elastic body 3 combined bodies. The multi-dimensional elastic body 3 of the multi-step dynamic damping device 1 can be made of rubber materials, the elastic rigidity of the multi-dimensional elastic body 3 is complex rigidity, and the damping coefficient is not less than 0.05.
The multi-dimensional power carrier 4 of the multi-step dynamic damping device 1 is made of reinforced concrete.
The resonance frequency band range of the multi-step dynamic damping device 1 is adjusted through the translation rigidity or the torsion rigidity of the multi-dimensional elastic body 3 and the translation equivalent mass and the equivalent rotational inertia of the multi-dimensional dynamic carrier 4, and the resonance frequency in each direction or position meets a formula f ij ＝(k ij /m ij ) 0.5 /(2π)，k ij Is the translational or torsional stiffness of the ith and jth dimension, m ij Is the ith order and jth dimension translational equivalent mass or equivalent rotational inertia, f ij Is the ith-order and jth-order resonance frequency, and four groups of multi-order dynamic damping devices of each upright column form a wide frequency band of 20-60Hz.
Example 2
As shown in fig. 3, the present embodiment provides a multi-stage dynamic damping device for a top cover property pillar, which has the same basic structure as that of embodiment 1, and the difference is that: the rigid mounting base assembly 2, the corresponding multidimensional elastic body 3 and the multidimensional power carrier 4 are in curved shapes and are suitable for columns with circular cross sections, and the rigid mounting base assembly 2 is connected with the upper cover property cover lower column 6 through an anchoring bolt connection structure.
Example 3
As shown in fig. 4, the present embodiment provides a multi-stage dynamic damping device for a top cover property pillar, which has the same basic structure as that of embodiment 2, and the difference is that: the rigid mounting base assembly 2 is designed in the form of a clip suitable for connection with either a round or square or rectangular upright 6.
Example 4
As shown in fig. 5, the present embodiment provides a multi-stage dynamic damping device for a top cover property post, which has the same basic structure as that of embodiment 1, and the difference is that: the multidimensional power carrier 4 is designed with a cavity structure 41 for a reinforced concrete matrix, and the cavity is filled with a stone sand damping material 42 to form the composite damping multidimensional power carrier.
The utility model discloses but greatly reduced vehicle section vehicle excitation covers the low band 1-80Hz broadband multi-peak value vibration of stand down, to covering the vibration excitation of building and spreading the vibration level of controlling effectively on the source.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the principles of this invention without the use of inventive faculty. Therefore, the technical solutions that can be obtained by logical analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention by those skilled in the art should be within the scope of protection defined by the claims.
Claims (10)
1. A multi-step dynamic damping device of an upper cover property upright post is disclosed, wherein the multi-step dynamic damping device (1) comprises a rigid mounting base assembly (2), a multi-dimensional elastic body (3), a multi-dimensional dynamic carrier (4) and a restraining protective layer (5); the method is characterized in that: be equipped with multiunit multidimension degree resonance unit on upper cover property lid lower column (6), each multidimension degree resonance unit of group is by a plurality of multidimension degree power carrier (4) of restraint protective layer (5) cladding and multidimension degree elastomer (3) and rigid mounting base subassembly (2) flexonics constitution, and multidimension degree elastomer (3) and multidimension degree power carrier (4) are installed on rigid mounting base subassembly (2).
2. The multi-stage dynamic damping device for the upper cover property column as claimed in claim 1, wherein the multi-stage dynamic damping device (1) comprises a plurality of independent multi-dimensional resonance units, each independent multi-dimensional resonance unit comprises more than two multi-dimensional elastic bodies (3) and multi-dimensional dynamic carriers (4).
3. The multi-step dynamic damping device for the upper cover property post according to claim 1 or 2, wherein the multi-dimensional elastic body (3) has elastic stiffness in more than two directions of tension and compression and shearing; the multi-dimensional power carrier (4) has equivalent translation mass and equivalent rotational inertia in more than two directions, namely vertical and horizontal directions.
4. The multi-stage dynamic damping device for the upper cover property post according to claim 1 or 3, wherein the multi-dimensional elastic body (3) is flexibly connected or bonded with a multi-dimensional dynamic carrier (4).
5. The multi-stage dynamic damping device for the upper cover property upright posts as claimed in claim 1, wherein the multi-dimensional elastic body (3) is arranged between the multi-dimensional dynamic carrier (4) and the rigid mounting base component (2) to form a multi-dimensional resonance unit.
6. The multi-stage dynamic damping device for the upper cover property upright post according to claim 1, wherein the rigid mounting base assembly (2) bears the gravity and harmonic vibration dynamic force of more than two multidimensional elastic body (3) and multidimensional power carrier (4) combinations, the weight bearing capacity of each combination is not lower than 100kg, and the harmonic dynamic force bearing capacity is not lower than 1kN.
7. The multi-stage dynamic damping device for the upper cover property upright column as claimed in claim 1, wherein the rigid mounting base assembly (2) is provided with an elastic limit support (21), the elastic limit support (21) is fixed on the rigid mounting base assembly (2) through a mounting frame (22), the rigidity of the elastic limit support (21) is less than 1/3 of the vertical rigidity of the multidimensional elastomer (3), a limit gap is reserved between the elastic limit support (21) and the multidimensional power carrier (4), and the limit gap is greater than or equal to 0mm.
8. The multi-step dynamic damping device for the upper cover property post according to claim 1, wherein the rigid mounting base assembly (2) is connected to the outer side of the middle upper part of the upper cover property post (6) through an anchoring bolt or a connecting structure (23), the multi-step dynamic damping device (1) is distributed at different positions on the outer side of the post (6), and the post (6) comprises a square or rectangular section post or a circular section post.
9. The multi-stage dynamic damping device for the upper cover property columns as claimed in claim 1, wherein the restraining protective layer (5) is made of a metal or nonmetal plate material or a net material or a coating, and the restraining protective layer (5) restrains a plurality of multi-dimensional dynamic carriers (4) and multi-dimensional elastic bodies (3) combined bodies.
10. The multi-step dynamic damper device (1) as claimed in claim 1, wherein the multi-dimensional elastic body (3) is made of rubber material or elastic composite material or spring steel material, the elastic stiffness of the multi-dimensional elastic body (3) is complex stiffness, and the damping coefficient is not less than 0.001;
the material of the multi-dimensional power carrier (4) is metal or nonmetal or cement or composite material, the structure of the multi-dimensional power carrier (4) is a composite damping structure, the composite damping structure comprises a damping constraint layer and a mass layer or a cavity structure containing damping material, and the damping material is viscoelastic material or damping particles.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221103555.5U CN218117400U (en) | 2022-04-28 | 2022-04-28 | Multistage dynamic damping device of upper cover property stand |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221103555.5U CN218117400U (en) | 2022-04-28 | 2022-04-28 | Multistage dynamic damping device of upper cover property stand |
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| CN218117400U true CN218117400U (en) | 2022-12-23 |
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| CN202221103555.5U Active CN218117400U (en) | 2022-04-28 | 2022-04-28 | Multistage dynamic damping device of upper cover property stand |
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