CN210481899U - Local resonance type supporting structure for floating plate track - Google Patents
Local resonance type supporting structure for floating plate track Download PDFInfo
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- CN210481899U CN210481899U CN201921082093.1U CN201921082093U CN210481899U CN 210481899 U CN210481899 U CN 210481899U CN 201921082093 U CN201921082093 U CN 201921082093U CN 210481899 U CN210481899 U CN 210481899U
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- 229920001971 elastomer Polymers 0.000 claims abstract description 40
- 239000005060 rubber Substances 0.000 claims abstract description 40
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- 239000010959 steel Substances 0.000 claims abstract description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 26
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- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a floating plate is local resonance type bearing structure for track, the foundation structure top is located to local resonance type bearing structure, and local resonance type bearing structure supports the floating plate by axial direction, and local resonance type bearing structure is formed by the same multilayer structure along the axial stack, and it has steel oscillator, rubber or polyurethane coating and aluminium system sleeve to distribute in proper order along radial from interior to exterior in every layer, is equipped with rubber or polyurethane bed course adjacent between two-layer. Compared with the prior art, the utility model obviously improves the corrosion resistance, and the vibrator is coated in the whole structure; the obvious effects of vibration reduction and noise reduction are achieved through the transmission and dissipation from top to bottom layer by layer; the device is not easy to have translocation or lateral deformation caused by stacking series connection, can bear intermittent high load pressure, and has long service life.
Description
Technical Field
The utility model relates to a field of making an uproar falls in the track traffic damping especially relates to point supports floating slab supporting structure for track.
Background
With the rapid development of urban rail transit, the environmental vibration problem caused by urban rail transit is becoming more and more prominent. At present, the most common practice in rail vibration control is to insert an elastic supporting layer between the upper rail structure and the lower foundation, and to damp the vibration generated by train operation by the inertial motion of the upper rail structure on the elastic supporting layer. By improving the elastic supporting layer of the floating plate track, the vibration caused by traveling can be effectively reduced.
During specific construction, the concrete road bed plate with certain mass and rigidity is placed on the steel spring vibration isolator and is 30mm or 40mm away from the top surface of the foundation cushion layer to form a mass-spring-vibration isolation system. In the aspect of vibration reduction efficiency, the effect of the spring vibration isolator floating slab track is better than that of a rubber supporting type floating slab track, the steel spring floating slab track bed has a history of more than 90 years at present, and the spring vibration isolator floating slab track is mainly used in occasions with special requirements on vibration reduction and noise reduction, such as hospitals, research institutes, museums, concert halls and the like, due to high manufacturing cost. On the other hand, the service life of the spring vibration isolator is usually 5-7 years, and the spring structure is easy to be damaged on the structure due to corrosion and difficulty in enduring intermittent high-load pressure and corrosion, so that the service life is suddenly reduced.
CN208201509U discloses a butterfly spring floating plate isolator, including top cap, base, the inside dabber that is equipped with of base, the dabber concatenates adjusting shim, disc spring and links to each other, adjusting shim is located the dabber and is close to the one end of base, adjusting shim top is equipped with disc spring, disc spring top is equipped with the top cap, base, top cap are connected through first clamp, second clamp, gum cover to pass through bolt fastening. Although the rigidity of the vibration isolator can be changed by changing the number of the belleville spring plates. However, the series-connection superposition structure of the springs is not beneficial to long-term matching use with the steel spring floating plate, and the torsion deformation of the springs and the structural aging are easily caused after long-term use.
Therefore, it is desirable to design a local resonance type supporting structure that has low cost, long life, corrosion resistance, and can withstand intermittent high load pressures.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to overcome the above-mentioned drawbacks of the prior art and to provide a local resonance type supporting structure for a floating slab track.
The purpose of the utility model can be realized through the following technical scheme:
a local resonance type supporting structure for a floating plate track is arranged above a base structure and is used for supporting a floating plate in the axial direction, the local resonance type supporting structure is formed by overlapping the same multilayer structures in the axial direction, a steel vibrator, an elastic coating layer and an aluminum sleeve are sequentially distributed in each layer from inside to outside in the radial direction, and a rubber cushion layer is arranged between every two adjacent layers.
Furthermore, the elastic coating layer is made of polyurethane material or rubber material.
Furthermore, the top of the local resonance type supporting structure is a rubber cushion layer which is abutted to the inner part or the bottom surface of the floating plate.
Furthermore, the bottom of the local resonance type supporting structure is a rubber cushion layer, and the rubber cushion layer is pressed against the upper surface of the base structure.
Furthermore, the steel oscillator and the elastic coating layer are connected with each other through gluing, and the elastic coating layer and the aluminum sleeve are connected with each other through gluing.
Furthermore, the rubber cushion layer is connected with the single-layer structures on the two sides in an adhesive mode to form a repeated arrangement structure in the axial direction.
Further, the single-layer structure has 2-6 layers in the axial direction.
Further, the thickness of the single-layer structure in the axial direction is 8cm, the diameter of the steel vibrator is 22cm, the thickness of the elastic coating layer is 7cm, the thickness of the aluminum sleeve is 8cm, and the thickness of the rubber cushion layer is 0.5 cm.
Further, the outer diameter of the rubber cushion layer is the same as that of the aluminum sleeve.
Further, the inner diameter of the rubber cushion layer is the same as that of the aluminum sleeve.
Further, the steel oscillator is solid or a cylindrical steel block with a small number of cavities.
Furthermore, the elastic coating layer and the aluminum sleeve are both cylindrical shell structures.
Compared with the prior art, the utility model has the advantages of it is following:
low cost, long service life, corrosion resistance, and high intermittent high load pressure resistance
1) The floating plate track among this technical scheme is with material that local resonance type bearing structure adopted is steel, rubber and aluminium material, and overall cost is lower, and local rubber materials's use and cooperation steel construction and aluminium structure have obviously improved corrosion resisting property, with the oscillator cladding in overall structure, only be used for transmitting the topmost and the bottommost of vibrational energy to expose, but the promotion of the simple and convenient realization corrosion resisting property of accessible mode with the coating.
2) Local resonance type bearing structure has adopted multilayer composite construction's stack among this technical scheme, and prolong axial reconnection, in the vibration energy transfer process, at first by the rail special pass to the floating plate, introduce into vibration type bearing structure body through the steel oscillator rather than contacting by the floating plate bottom again, get into behind the steel oscillator of the superiors, divide into side all the way and the below respectively propagate all the way, side all the way is around 60% of dissipation by the elastic coating, it continues to transmit to aluminium system sleeve with 40%, aluminium system sleeve easily transmits the vibration energy, its energy dissipation is less, most is axial transmission to rubber cushion layer downwards promptly, the border department at rubber cushion dissipates totally. One path of axial transmission below is mainly transmitted to the rubber cushion layer through the steel vibrator, 60% of the rubber cushion layer is dissipated, and the rest part of the rubber cushion layer is continuously transmitted downwards. Through the transmission and dissipation from bottom to top layer by layer, the vibration energy finally transmitted to the upper surface of the base structure is only less than 5% of the initial value, and the remarkable vibration and noise reduction effects are achieved.
3) This kind of compound stacked structure of multilayer cylinder can realize piling up of 2 ~ 6 layers, compares spring structure or series connection spring structure, and structural performance is stable, and the ageing resistance is excellent, is difficult to appear because pile up translocation or the side direction deformation that the series connection produced, can tolerate intermittent type formula high load pressure, whole long service life.
Drawings
FIG. 1 is a schematic cross-sectional view of the installation position of the resonance type supporting structure of the present invention;
FIG. 2 is a schematic diagram of an exploded view of a resonant bearing structure of the present invention;
FIG. 3 is a finite element model for calculating the vibration transfer characteristics of the medium area resonance type supporting structure of the present invention;
FIG. 4 is a frequency response function diagram of the resonance type periodic supporting layer of the present invention;
FIG. 5 is a frequency dispersion curve diagram of the vibration damping effect analysis of the middle-area resonance type periodic supporting layer according to the present invention;
fig. 6 is a frequency response function diagram of the vibration damping effect analysis of the periodic supporting layer of the local resonance type according to the present invention.
In the figure: 1. the vibration type supporting structure comprises a floating plate, 2, a vibration type supporting structure body, 3, a steel vibrator, 4, an elastic coating layer, 5, an aluminum sleeve, 6, a rubber cushion layer, 7 and a foundation structure.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Examples
The local resonance type supporting structure for the floating plate track is arranged above a base structure 7), the local resonance type supporting structure supports the floating plate 1 in the axial direction, the local resonance type supporting structure is formed by overlapping the same multilayer structures in the axial direction, a steel vibrator 3, an elastic coating layer 4 and an aluminum sleeve 5 are sequentially distributed in each layer from inside to outside in the radial direction, and a rubber cushion layer 6 is arranged between every two adjacent layers.
Connection of the steel vibrator 3 to an external structure: the steel vibrator 3 in the uppermost layer structure abuts against the inside or the bottom surface of the floating plate 1. The steel vibrator 3 in the lowest layer structure is pressed against the upper surface of the base structure 7. The steel oscillator 3 is connected with the elastic coating layer 4, and the elastic coating layer 4 is connected with the aluminum sleeve 5 in an adhesive manner. The rubber cushion layer 6 is connected with the single-layer structures on the two sides in an adhesive mode to form a repeated arrangement structure in the axial direction.
In the specific structure aspect: the single-layer structure has 2-6 layers in the axial direction. The thickness of the single-layer structure in the axial direction is 8cm, the diameter of the steel vibrator is 22cm, the thickness of the elastic coating layer is 7cm, the thickness of the aluminum sleeve is 8cm, the thickness of the rubber cushion layer is 0.5cm, and the size can be changed according to requirements. The outer diameter of the rubber cushion 6 is the same as that of the aluminum sleeve 5. The inner diameter of the rubber cushion 6 is the same as the inner diameter of the aluminum sleeve 5.
The specific material selection aspect is as follows: the steel vibrator 3 is a solid or a steel block with a small number of cavities. The elastic coating layer 4 and the aluminum sleeve 5 are both in a cylindrical shell structure.
In the concrete working process, vibration energy is firstly transmitted into the vibration type supporting structure body 2 by the rubber cushion layer 6 at the top, and after entering the steel vibrator 3 on the uppermost layer, the vibration type supporting structure body is divided into one way of side and one way of below to be respectively transmitted, one way of side is dissipated by the elastic coating layer 4 by about 60%, the vibration type supporting structure body and the aluminum sleeve 5 are continuously transmitted to the aluminum sleeve 5 by 40%, the aluminum sleeve 5 is easy to transmit vibration energy, the energy dissipation is less, most of the vibration type supporting structure body is axially transmitted to the rubber cushion layer 6 downwards, and the dissipation is almost complete at the edge of. One path of axial transmission below is mainly transmitted to the rubber cushion layer 6 through the steel vibrator 3, 60% of power is dissipated at the rubber cushion layer 6, and the rest part is continuously transmitted downwards. Through the transmission and dissipation from bottom to top layer by layer, the vibration energy finally transmitted to the upper surface of the base structure 7 is only less than 5% of the initial value, and the remarkable vibration and noise reduction effect is achieved.
In this example, the material parameters of the steel vibrator 3, the elastic coating layer 4, the aluminum sleeve 5, and the rubber pad layer 6 are shown in table 1.
TABLE 1 Material parameter Table
Considering that the subway vibration reduction measures mainly aim at vertical vibration, the local resonance type periodic supporting layer is a one-dimensional periodic structure, so that when analyzing the vibration transmission characteristics of the periodic supporting layer, only simple harmonic acceleration excitation needs to be applied to the upper part of the structure, and the vibration transmission characteristics of the structure are analyzed by calculating the acceleration response of the lower part of the periodic supporting layer, and a finite element model for calculating the vibration transmission characteristics of the periodic supporting layer is shown in fig. 3.
The acceleration transmissibility of the periodic support layer can be expressed as:
in the formula, ainAmplitude of acceleration of upper input, aoutFig. 4 shows the calculation results of the vibration transmission characteristics of the periodic support layer, which are the index indicating that the transmission rate is less than 0 and the vibration damping effect of the periodic support layer acts in response to the acceleration of the lower output.
As can be seen from fig. 4, the vibration transmissivities of the periodic support layers are all less than 0 in the frequency range of 55Hz to 133Hz, which indicates that the vibration damping effect of the periodic support layers works in this range, and this frequency range corresponds to the range of the first-order band gap of the infinite periodic structure, and as can be seen from comparing fig. 5 and 6, the first-order band gap of the infinite periodic structure obtained by calculating the structural dispersion curve coincides with the vibration damping region of the finite periodic structure obtained by calculating the frequency response function.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.
Claims (10)
1. A local resonance type supporting structure for a floating plate track is characterized in that the local resonance type supporting structure is arranged above a base structure (7), the local resonance type supporting structure supports a floating plate (1) in the axial direction, the local resonance type supporting structure is formed by overlapping the same multilayer structures in the axial direction, a steel vibrator (3), an elastic coating layer (4) and an aluminum sleeve (5) are sequentially distributed in each layer from inside to outside in the radial direction, and a rubber cushion layer (6) is arranged between every two adjacent layers.
2. The local resonance type support structure for a floating plate rail according to claim 1, wherein said elastic coating layer (4) is a polyurethane material or a rubber material.
3. The local resonance type supporting structure for the floating plate rail as claimed in claim 1, wherein the top of the local resonance type supporting structure is a rubber cushion layer (6), and the rubber cushion layer (6) abuts against the inside or the bottom surface of the floating plate (1).
4. The local resonance type support structure for floating plate rails according to claim 1, characterized in that the bottom of the local resonance type support structure is a rubber pad (6), and the rubber pad (6) is pressed against the upper surface of the base structure (7).
5. The local resonance type support structure for a floating plate rail according to claim 1, wherein the steel vibrator (3) and the elastic coating layer (4) are connected by adhesive, and the elastic coating layer (4) and the aluminum sleeve (5) are connected by adhesive.
6. The local resonance type supporting structure for a floating plate rail as claimed in claim 1, wherein said rubber pad layer (6) is connected with the single layer structure at both sides by means of gluing to form a repeated arrangement structure in the axial direction.
7. The local resonance type support structure for a floating plate rail as claimed in claim 6, wherein the single layer structure has 2 to 6 layers in the axial direction.
8. The local resonance type support structure for a floating plate rail according to claim 6, wherein the single layer structure has a thickness of 8cm in the axial direction, the steel vibrator (3) has a diameter of 22cm, the elastic coating layer (4) has a thickness of 7cm, the aluminum sleeve (5) has a thickness of 8cm, and the rubber pad layer (6) has a thickness of 0.5 cm.
9. The local resonance type support structure for a floating plate rail according to claim 1, wherein the rubber cushion (6) has the same outer diameter as the aluminum sleeve (5).
10. The local resonance type support structure for a floating plate rail according to claim 1, wherein the inner diameter of the rubber cushion (6) is the same as the inner diameter of the aluminum sleeve (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921082093.1U CN210481899U (en) | 2019-07-11 | 2019-07-11 | Local resonance type supporting structure for floating plate track |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921082093.1U CN210481899U (en) | 2019-07-11 | 2019-07-11 | Local resonance type supporting structure for floating plate track |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110499676A (en) * | 2019-07-11 | 2019-11-26 | 同济大学 | A kind of floating plate track locally resonant type supporting structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110499676A (en) * | 2019-07-11 | 2019-11-26 | 同济大学 | A kind of floating plate track locally resonant type supporting structure |
| CN110499676B (en) * | 2019-07-11 | 2024-07-23 | 同济大学 | Local resonance type supporting structure for floating slab track |
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Granted publication date: 20200508 |