CN107366200B - Particle damping energy-dissipation vibration reduction ballast pad - Google Patents
Particle damping energy-dissipation vibration reduction ballast pad Download PDFInfo
- Publication number
- CN107366200B CN107366200B CN201710656270.1A CN201710656270A CN107366200B CN 107366200 B CN107366200 B CN 107366200B CN 201710656270 A CN201710656270 A CN 201710656270A CN 107366200 B CN107366200 B CN 107366200B
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- Prior art keywords
- damping energy
- rubber plate
- particle
- particle damping
- damping
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
- E01B19/003—Means for reducing the development or propagation of noise
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/01—Elastic layers other than rail-pads, e.g. sleeper-shoes, bituconcrete
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Railway Tracks (AREA)
Abstract
The invention discloses a particle damping energy-consumption vibration-reduction ballast pad which is arranged between a ballast and a track foundation, wherein the particle damping energy-consumption vibration-reduction ballast pad comprises a rubber plate, and a particle damping energy-consumption element and a steel wire which are buried in the rubber plate; the upper surface of the rubber plate is provided with a reserved cementing belt. The invention has the advantages that the particle damping technology is adopted for the railway ballast pad, so that the original rigidity of a track structure can be reduced, the effect of dissipating energy can be achieved by increasing the structural damping, and the vibration absorption and isolation effects of the railway ballast pad are effectively improved.
Description
Technical Field
The invention belongs to the field of rail transit, and particularly relates to a particle damping energy-dissipation vibration-reduction ballast pad.
Background
Railway and urban rail transit systems have evolved rapidly in recent years due to their large capacity and environmental advantages, but with the deleterious effects of noise and environmental vibrations.
The traditional track structure vibration damping technology comprises floating plates, vibration damping fasteners, ballast mats and the like, and the working mechanism of the floating plates, the vibration damping fasteners, the ballast mats and the like is that the vibration damping effect is achieved by changing the rigidity of the track structure, and the device is high in manufacturing cost or can improve the vibration of a vehicle body. It is necessary to develop a new track structure vibration damping device.
The traditional track structure vibration damping technology comprises floating plates, vibration damping fasteners, ballast mats and the like, and the working mechanism of the floating plates, the vibration damping fasteners, the ballast mats and the like is that the vibration damping effect is achieved by changing the rigidity of the track structure, and the device is high in manufacturing cost or can improve the vibration of a vehicle body. It is necessary to develop a new track structure vibration damping device.
Disclosure of Invention
According to the defects of the prior art, the invention provides the particle damping energy-consumption vibration reduction ballast pad, and the ballast pad effectively improves the damping and vibration energy dissipation capacity of the ballast pad by embedding the steel wires and the particle damping energy-consumption elements in the rubber plate.
The invention is realized by the following technical scheme:
the particle damping energy-dissipation vibration-reduction ballast pad is arranged between the ballast and the track foundation and comprises a rubber plate, and particle damping energy-dissipation elements and steel wires which are buried in the rubber plate; the upper surface of the rubber plate is provided with a reserved cementing belt.
The particle damping energy dissipation element comprises a shell, and damping particles are arranged inside the shell.
The shell is hexahedral, and the side length of the shell is 1-2 cm.
The damping particles are made of any one or a combination of a plurality of tungsten powder, lead powder, copper powder and iron powder; the particle size of the damping particles is 0.001-0.5 mm; the filling rate of the damping particles in the shell is 50-90%.
The components of the rubber plate comprise natural rubber, phenolic resin and hard carbon black.
The rubber plate comprises a top bearing layer and a bottom mixing layer; the particle damping energy dissipation element and the steel wire are buried in the bottom mixed layer.
The particle damping energy dissipation elements are arranged in a single-layer array inside the rubber plate; the distance between the lower surface of the particle damping energy dissipation element and the lower surface of the rubber plate is more than 1cm; the distance between the upper surface of the particle damping energy dissipation element and the upper surface of the rubber plate is more than 2cm; the distance between the adjacent particle damping energy dissipation elements is 2-4 cm.
The steel wire surrounds the particle damping energy dissipation element, and the distance between the steel wire and the particle damping energy dissipation element is 0.5-1 cm.
The reserved cementing strips are arranged on two sides of the upper surface of the rubber plate.
The invention has the advantages that the particle damping technology is adopted for the railway ballast pad, so that the original rigidity of a track structure can be reduced, the effect of dissipating energy can be achieved by increasing the structural damping, and the vibration absorption and isolation effects of the railway ballast pad are effectively improved.
Drawings
FIG. 1 is a perspective view of a particulate damping energy-dissipating vibration-absorbing ballast mat of the present invention;
FIG. 2 is a cross-sectional view of a particulate damping energy-dissipating vibration-absorbing ballast mat of the present invention;
FIG. 3 is a schematic diagram of a particle damping energy dissipating element according to the present invention;
fig. 4 is a schematic diagram of the particle damping energy-dissipation vibration attenuation ballast pad in the application process.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings, to facilitate understanding by those skilled in the art:
as shown in fig. 1-4, reference numerals 1-13 are respectively: the particle damping energy-dissipation vibration attenuation ballast pad 1, the rubber plate 2, the particle damping energy-dissipation element 3, the steel wire 4, the reserved cementing strip 5, the top bearing layer 6, the bottom mixed layer 7, the shell 8, the damping particles 9, the track foundation 10, the ballast 11, the steel rail 12 and the sleeper 13.
Examples: as shown in fig. 1 and 4, the present embodiment specifically relates to a particle damping energy-dissipation vibration-reduction ballast pad, which is disposed between a ballast 11 and a track foundation 10, wherein the particle damping energy-dissipation vibration-reduction ballast pad 1 comprises a rubber plate 2, and a particle damping energy-dissipation element 3 and a steel wire 4 buried inside the rubber plate 2; the upper surface of the rubber plate 2 is provided with a reserved cementing strip 5.
As shown in fig. 1 and 2, the rubber plate 2 has a length of 5000mm to 4000mm, a width of 1000mm to 1500mm, and a thickness of 5 to 7cm; the rubber plate 2 comprises natural rubber, phenolic resin and hard carbon black; the phenolic resin can strengthen the strength of the rubber plate 2, and the hard carbon black can increase the wear resistance of the rubber plate 2; the rubber sheet 2 comprises a top bearing layer 6 and a bottom mixing layer 7; in this embodiment, the top bearing layer 6 and the bottom mixed layer 7 are integrally formed, and the particle damping energy dissipation element 3 and the steel wire 4 are embedded in the bottom mixed layer 7.
As shown in fig. 1 and 2, the steel wires 4 buried in the rubber sheet 2 serve to enhance the rigidity of the rubber sheet 2; the diameter of the steel wire is 1mm; the steel wire 4 surrounds the particle damping energy dissipation element 3, and the distance between the steel wire 4 and the particle damping energy dissipation element 3 is 0.5-1 cm.
As shown in fig. 2 and 3, the particle damping energy dissipation elements 3 are arranged in a single-layer array inside the rubber plate 2; the distance between the lower surface of the particle damping energy dissipation element 3 and the lower surface of the rubber plate 2 is more than 1cm; the distance between the upper surface of the particle damping energy dissipation element 3 and the upper surface of the rubber plate 2 is more than 2cm; the distance between every two adjacent particle damping energy dissipation elements 3 is 2-4 cm; the reserved cementing strip 5 is arranged on two sides of the upper surface of the rubber plate 2, and the steel wire 4 and the particle damping energy dissipation element 3 are not arranged in the rubber plate 2 right below the reserved cementing strip 5.
As shown in fig. 2 and 3, the particle damping energy dissipation element 3 embedded in the rubber plate 2 is mainly used for absorbing vibration energy of the particle damping energy dissipation vibration reduction ballast pad 1 in the working process; the particle damping energy dissipation element 3 comprises a housing 8, inside which housing 8 damping particles 9 are arranged.
As shown in fig. 2 and 3, the particle damping energy dissipation element 3 is a passive vibration control technology; when the particle damping energy-consumption vibration-reduction ballast pad 1 is in a working state, vibration of the particle damping energy-consumption vibration-reduction ballast pad 1 is transmitted to the particle damping energy-consumption element 3 through the rubber plate 2, so that damping particles 9 in the particle damping energy-consumption element 3 vibrate; during the vibration of the damping particles 9, collisions and friction between the damping particles 9 occur; the collision and friction consume vibration energy and convert the vibration energy into heat, so that the effect of dissipating the vibration energy is realized; the particle damping energy dissipation element 3 is buried in the rubber plate 2, so that the capacity of the particle damping energy dissipation vibration reduction ballast pad 1 in the embodiment for dissipating vibration energy can be effectively enhanced.
As shown in fig. 3, in the present embodiment, the housing 8 of the particle damping energy dissipation device 3 is a regular hexahedron made of a Q195 steel sheet with a thickness of 1-4 mm, and the side length thereof is 1-2 cm; the splice of the thin steel plates of the shell 8 is formed by adhering metal glue using ethyl cyanoacrylate as a main raw material.
As shown in fig. 3, in this embodiment, the damping particles 9 are made of any one or more of tungsten powder, lead powder, copper powder and iron powder, and the overall density of the damping particles 9 can be adjusted by adjusting the proportion of the damping particles 9 made of various materials; the particle diameter of the damping particles 9 is 0.001mm to 0.5mm; the filling rate of the damping particles 9 inside the housing 8 is between 50% and 90%.
As shown in fig. 1 to 3, the particle damping energy dissipation vibration attenuation ballast pad 1 of the present embodiment can select parameters such as the filling rate of damping particles 9, the material of the damping particles 9, the arrangement density of the particle damping energy dissipation elements 3, and the thickness, width, length of the rubber sheet 2 according to different railway line conditions and dynamic loads caused by different train speeds; the manufacturing method of the particle damping energy-dissipation vibration attenuation ballast pad comprises the following steps:
1) And (3) parameter selection: the filling rate of damping particles 9, the material quality of the damping particles 9, the arrangement density of the particle damping energy dissipation elements 3, the thickness, width, length and other parameters of the rubber plate 2 are determined according to the grade of the circuit and the requirement of the circuit on vibration reduction and noise reduction;
2) Raw material preparation: the ingredients are accurately weighed according to the formula. In order to ensure that raw rubber and the compounding agent can be uniformly mixed with each other, the materials are required to be processed, and the raw rubber is cut into small pieces after being baked and softened in a drying room at 60-70 ℃; evaporating water from the phenolic resin and filtering impurities; the complexing agent is dried;
3) Plasticating: the rubber product is plasticated by a mechanical method, and long-chain rubber molecules are degraded and shortened under the action of mechanical extrusion and friction force of a plasticator at a low temperature, so that the rubber product is converted into a moldable state from a high-elasticity state;
4) Mixing: mixing the plasticated raw rubber with a compounding agent, and putting the mixture into a rubber mixing mill, so that the compounding agent is completely and uniformly dispersed in the raw rubber under the mechanical mixing effect;
5) And (3) forming: the rubber plate 2 is formed by calendaring, a layer of thin glue is required to be coated on the steel wire 4 and the particle damping energy dissipation element 3 in the rubber plate, and the gluing process is generally completed on a calendaring machine; the steel wire 4 and the particle damping energy dissipation element 3 are required to be dried and impregnated before being rolled, and then are put into a die to be molded in a calender;
6) Vulcanizing: vulcanizing the rubber plate 2 by using a rubber vulcanizing machine; the manufacturing of the particle damping energy-dissipation vibration attenuation ballast pad 1 of the embodiment is completed.
As shown in fig. 2 and 4, the installation and use method of the particle damping energy-dissipation vibration attenuation ballast pad 1 in this embodiment specifically includes the following steps:
and (3) preparation of construction: the storage of the particle damping energy-consumption vibration-reduction ballast pad 1 should be kept dry and clean, strong ultraviolet radiation is prevented, and long-time insolation is forbidden. The particle damping energy-dissipation vibration reduction ballast pad 1 should be paved according to the design area, and the seam of the particle damping energy-dissipation vibration reduction ballast pad 1 is forbidden to generate an excessive gap. The track foundation 10 (e.g., overpass) must be guaranteed to be flat without depressions and sharp protrusions; in extreme environments, at low-temperature and high-humidity night and daytime and outdoor construction at high temperatures of burning sun, the particle damping energy-consumption vibration reduction ballast pad 1 can be not tightly paved; in order to avoid the phenomenon, paving construction is carried out in a rainfall-free weather at the temperature of 0-25 ℃ as much as possible;
cleaning a track foundation: the track foundation 10 should be guaranteed to be clean, dry, frostless and flat, avoiding the occurrence of pits and sharp protrusions;
laying a particle damping energy-consumption vibration reduction ballast pad 1: the particle damping energy-consumption vibration reduction ballast pad 1 is transversely rolled from two sides of the track, and the bearing layer is upwards and directly contacted with the ballast 11. Construction under the conditions of extreme temperature and overlarge temperature difference and construction after long-time storage, the particle damping energy-consumption vibration reduction ballast pad 1 must be placed on a laying position of the particle damping energy-consumption vibration reduction ballast pad for stretching for several hours and then stuck, so that the particle damping energy-consumption vibration reduction ballast pad 1 can be restored to be compressed and stretched when being rolled into a cylinder shape, and the size of the particle damping energy-consumption vibration reduction ballast pad 1 is better controlled;
the method is characterized in that the pasting of the ballast mats is realized by a special hot-melt welding machine and a special sealing strip with the width of 10 cm to 15cm, and the joints among the particle damping energy-consumption vibration-reduction ballast mats 1 are required to be effectively and compactly bonded; the laying of the particle damping energy-consumption vibration reduction ballast pad 1 is strictly carried out according to a construction scheme, so that the condition of loose sealing is avoided. The operation of the hot melt welder is strictly executed according to the regulations, so that excessive hot melt is avoided;
paving a track panel and railway ballast: after the particle damping energy-consumption vibration reduction ballast pad 1 is paved, the ballast 11 is covered on the particle damping energy-consumption vibration reduction ballast pad as soon as possible; the vehicle for paving the railway ballast 11 must use rubber tires without sharp protrusions and slowly run, and sudden braking or acceleration should be avoided when the vehicle runs; after the paving of the railway ballast 11 is completed, paving a track panel above the railway ballast; the laying of the particle damping energy-dissipation vibration reduction ballast pad 1 of the embodiment is completed.
As shown in fig. 4, during the running of the train, vibrations generated by the interaction of the wheels with the rails 12 are transmitted to the railway ballast 11 through the sleepers 13, and then transmitted to the track foundation 10 through the railway ballast 11. The particle damping energy dissipation and vibration reduction ballast pad 1 is placed between the ballast 11 and the track foundation 10, and vibration energy is dissipated through the particle damping energy dissipation element 3 inside the particle damping energy dissipation device. The particle damping energy-dissipation vibration-reduction ballast pad 1 is added in the vibration propagation path of the track, which is equivalent to the change of the structural damping of the original track structure, and the energy of vibration can be effectively dissipated through the change of the structural damping, so that the effects of vibration reduction, vibration isolation and energy dissipation are achieved.
The beneficial technical effects of this embodiment are: the ballast pad adopting the particle damping technology not only can reduce the original rigidity of the track structure, but also can play a role in dissipating energy by increasing the structural damping, and effectively improves the vibration absorption and isolation effects of the ballast pad.
Claims (5)
1. The utility model provides a granule damping power consumption damping railway ballast pad, arranges between railway ballast and track foundation, its characterized in that: the particle damping energy dissipation vibration attenuation ballast pad comprises a rubber plate, and particle damping energy dissipation elements and steel wires which are buried in the rubber plate; the upper surface of the rubber plate is provided with a reserved cementing belt;
the rubber plate comprises natural rubber, phenolic resin and hard carbon black;
the rubber plate comprises a top bearing layer and a bottom mixing layer; the particle damping energy dissipation element and the steel wire are buried in the bottom mixed layer;
the particle damping energy dissipation elements are arranged in a single-layer array inside the rubber plate; the distance between the lower surface of the particle damping energy dissipation element and the lower surface of the rubber plate is more than 1cm; the distance between the upper surface of the particle damping energy dissipation element and the upper surface of the rubber plate is more than 2cm; the distance between the adjacent particle damping energy dissipation elements is 2-4 cm;
the steel wire surrounds the particle damping energy dissipation element, and the distance between the steel wire and the particle damping energy dissipation element is 0.5-1 cm.
2. The particulate damping energy-dissipating vibration attenuation ballast mat of claim 1, wherein: the particle damping energy dissipation element comprises a shell, and damping particles are arranged inside the shell.
3. The particulate damped energy-consuming vibration-reducing ballast mat of claim 2, wherein: the shell is hexahedral, and the side length of the shell is 1-2 cm.
4. The particulate damped energy-consuming vibration-reducing ballast mat of claim 2, wherein: the damping particles are made of any one or a combination of a plurality of tungsten powder, lead powder, copper powder and iron powder; the particle size of the damping particles is 0.001-0.5 mm; the filling rate of the damping particles in the shell is 50-90%.
5. The particulate damping energy-dissipating vibration attenuation ballast mat of claim 1, wherein: the reserved cementing strips are arranged on two sides of the upper surface of the rubber plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710656270.1A CN107366200B (en) | 2017-08-03 | 2017-08-03 | Particle damping energy-dissipation vibration reduction ballast pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710656270.1A CN107366200B (en) | 2017-08-03 | 2017-08-03 | Particle damping energy-dissipation vibration reduction ballast pad |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107366200A CN107366200A (en) | 2017-11-21 |
| CN107366200B true CN107366200B (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710656270.1A Active CN107366200B (en) | 2017-08-03 | 2017-08-03 | Particle damping energy-dissipation vibration reduction ballast pad |
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| CN (1) | CN107366200B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112211037B (en) * | 2020-09-03 | 2022-04-22 | 中铁第一勘察设计院集团有限公司 | Ballast track with adjustable rigid foundation and sleeper thereof |
| CN114214877A (en) * | 2021-11-26 | 2022-03-22 | 中铁一局集团有限公司 | High-speed railway track bed construction method |
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| CN106553397A (en) * | 2016-12-05 | 2017-04-05 | 吉林大学 | A kind of fiber/metal-layer structure composite and preparation method thereof |
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Inventor after: Feng Qingsong Inventor after: Li Wenbin Inventor after: Zhang Ling Inventor after: Luo Gun Inventor after: Lei Xiaoyan Inventor before: Feng Qingsong Inventor before: Li Wenbin Inventor before: Luo Gun Inventor before: Lei Xiaoyan |
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