CN110983943A - Damping type low-noise trough beam for high-speed railway - Google Patents
Damping type low-noise trough beam for high-speed railway Download PDFInfo
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- CN110983943A CN110983943A CN201911423316.0A CN201911423316A CN110983943A CN 110983943 A CN110983943 A CN 110983943A CN 201911423316 A CN201911423316 A CN 201911423316A CN 110983943 A CN110983943 A CN 110983943A
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- 238000013016 damping Methods 0.000 title claims abstract description 51
- 230000009467 reduction Effects 0.000 claims abstract description 44
- 230000000694 effects Effects 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 description 8
- 230000002411 adverse Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000002861 polymer material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
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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
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a damping type low-noise trough beam for a high-speed railway, which comprises a bottom plate, wing plates, curved surface scattering noise reduction structures and damping vibration reduction structures, wherein the wing plates are symmetrically arranged on two sides of the bottom plate along the length direction of the bottom plate; the longitudinal section of each wing plate is in an inclined T shape and comprises a horizontal part at the upper end and an inclined part, the lower end of the inclined part is connected with the end part of the bottom plate, and the inclined part is inclined outwards; the damping vibration attenuation structure comprises a hollow plane plate-shaped structure and a damping layer arranged in the hollow plane plate-shaped structure, the plane plate-shaped structure is parallel to the inclined part, and a cavity is enclosed by the plane plate-shaped structure, the inclined part, the horizontal part and the bottom plate. The damping type low-noise trough beam for the fast railway can improve the noise reduction effect of the noise outside the train and reduce the influence on the noise inside the train; the method can simultaneously give consideration to the clearance requirement and the structural noise vibration requirement, and is particularly suitable for sections where high-speed railways pass through urban areas and must meet the internal and external noise limit values of vehicles at the same time.
Description
Technical Field
The invention relates to the technical field of high-speed railway bridges, in particular to a damping type low-noise trough beam for a high-speed railway.
Background
With the increase of the running speed of the high-speed railway, the noise problem generated by the running speed of the high-speed railway becomes a prominent factor influencing the quality of life of residents along the railway. In bridge sections, vehicle exterior noise is often reduced by installing sound barriers on the box beams. In addition, with the acceleration of the urbanization process, more and more high-speed railways pass through cities, overpass sections of urban road sections are more, the requirement of clearance exists, box beam buildings commonly used for railways are high in height and limited in use, and trough beams are usually adopted for replacing the box beam buildings.
However, existing trough beams typically do not take into account noise reduction requirements while taking into account headroom requirements. The inner side of the wing plate of the channel beam is a rigid reflecting surface, multiple reflections are formed between the rigid reflecting surface and a train, the noise reduction effect outside the train can be weakened, and the influence on the noise inside the train is larger than that of a sound barrier with the same height. The wing plate is a structure similar to a cantilever beam, and wheel rail force and air flow act on the wing plate, so that low-frequency secondary structure vibration noise can be generated, and the life of residents is interfered.
Therefore, in order to better improve the noise reduction effect outside the vehicle and reduce the influence on the inside of the vehicle of the trough beam and simultaneously reduce the vibration noise of the secondary structure generated by the structure of the trough beam body, a special vibration reduction and noise reduction design needs to be carried out on the trough beam.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a damping type low-noise trough beam for a high-speed railway, which can improve the noise reduction effect of the noise outside a vehicle and reduce the influence on the noise inside the vehicle.
The invention is realized by the following technical scheme:
a damping type low-noise channel beam for a high-speed railway comprises a base plate, wing plates, a curved surface scattering noise reduction structure and a damping vibration attenuation structure, wherein the wing plates are symmetrically arranged on two sides of the base plate along the length direction of the base plate;
the longitudinal section of each wing plate is in an inclined T shape and comprises a horizontal part at the upper end and an inclined part at the lower end, and the inclined parts are connected with the end parts of the bottom plates and are inclined outwards;
one surface of the curved surface scattering noise reduction structure is attached to the inner side surface of the inclined part, and the other surface of the curved surface scattering noise reduction structure is thickened in the transverse direction to form a wavy scattering noise reduction surface;
the damping vibration attenuation structure comprises a hollow plane plate-shaped structure and a damping layer arranged in the hollow plane plate-shaped structure, the plane plate-shaped structure is parallel to the inclined part, and the plane plate-shaped structure, the inclined part, the horizontal part and the bottom plate enclose a cavity.
In the above-described aspect, the horizontal portion may extend to an outer side of the inclined portion by a length greater than a length extending to an inner side of the inclined portion.
In the technical scheme, the horizontal part is provided with 6 faces, the first side face, the second side face, the third side face, the top face, the fourth side face and the fifth side face are sequentially arranged from the connecting position of the horizontal part and the outer side face of the inclined part, the top face is a horizontal face, the third side face and the fourth side face are vertical faces, and the fifth side face is connected with the inner side face of the inclined part.
In the above technical solution, two opposite slopes are formed downwards at two ends of the top surface of the bottom plate.
In the above technical scheme, the inner end of the inclined plane is connected with the bottom end of the outer side surface of the inclined part, and the outer end of the inclined plane is connected with the bottom end of the damping vibration attenuation structure.
In the above technical solution, the damping vibration attenuation structure includes an inner panel close to the inclined portion and an outer panel far from the inclined portion, and the damping layer is laid between the inner panel and the outer panel.
In the above technical scheme, the top end of the outer panel is connected to the slightly inward position of the outer end of the first side face, and the bottom end of the outer panel is connected to the outer end of the inclined face.
In the above technical solution, an included angle between the first side surface and the inner panel is less than 90 °.
In the technical scheme, the inner side of the inclined part forms an included angle of 120-135 degrees with the bottom plate.
In the above technical solution, an included angle formed by an inner side of the inclined portion and the bottom plate is preferably 120 °.
The invention has the advantages and beneficial effects that:
(1) the wing plates of the damping type low-noise trough beam of the high-speed railway are inclined outwards, the width of the interior of the trough beam is increased, the adverse effect of pneumatic load is weakened, the wheel track noise and the lower pneumatic noise are shielded, meanwhile, the acting force of the pneumatic force on the wing plates is reduced, and the safety performance of the trough beam is improved;
(2) the horizontal part of the wing plate of the damping type low-noise trough beam of the high-speed railway is provided with a plurality of surfaces to form a diffraction surface with a certain width, so that the noise reduction effect is improved, and meanwhile, the diffraction surface can be designed in a targeted manner according to the frequency of the control noise;
(3) the curved surface scattering noise reduction structure of the damping type low-noise trough beam of the high-speed railway further improves the noise reduction effect of the external noise of the wing plate, and simultaneously weakens multiple reflections so as to reduce the influence on the internal noise of the vehicle;
(4) the damping vibration attenuation structure of the damping type low-noise trough beam of the high-speed railway greatly reduces the transverse vibration of the wing plate, dissipates vibration energy, reduces the vibration sound radiation of the secondary structure of the wing plate, and can shield the radiation noise outside the wing plate;
(5) the damping type low-noise trough beam for the high-speed railway can simultaneously give consideration to clearance requirements and structural noise vibration requirements, and is particularly suitable for sections where the high-speed railway passes through urban areas and must simultaneously meet internal and external noise limit values of vehicles.
Drawings
FIG. 1 is a schematic cross-sectional view of a damping type low-noise trough beam of a high-speed railway according to the present invention.
Fig. 2 is a view in the direction a of fig. 1.
Wherein:
1: bottom plate, 101: inclined plane, 2: horizontal portion, 201: first side, 202: second side, 203: third side, 204: top surface, 205: fourth side, 206: fifth side, 3: inclined portion, 4: damping vibration attenuation structure, 401: outer panel, 402: inner panel, 403: damping layer, 5: cavity, 6: curved surface scattering noise reduction structure, 601: a scattering noise reduction surface.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
The invention is described in further detail below with reference to specific embodiments and with reference to the following figures. It should be noted that: the following examples are illustrative and not intended to be limiting, and are not intended to limit the scope of the invention.
Example one
The invention discloses a damping type low-noise trough beam for a high-speed railway, which comprises a base plate 1, wing plates, a curved surface scattering noise reduction structure 6 and a damping vibration attenuation structure 4, wherein the wing plates are symmetrically arranged on two sides of the base plate 1 along the length direction of the base plate 1; wherein the longitudinal section of each wing plate is in an inclined T shape and comprises a horizontal part 2 at the upper end and an inclined part 3 which is connected with the end part of the bottom plate 1 at the lower end and inclines outwards; the wing plates incline outwards, the width of the interior of the trough beam is increased, the adverse effect of pneumatic load is weakened, wheel track noise and lower portion pneumatic noise are shielded, meanwhile, the acting force of the pneumatic force on the wing plates is reduced, and the safety performance of the trough beam is improved.
The curved surface scattering noise reduction structure 6 is made of concrete, one surface of the curved surface scattering noise reduction structure is attached to the inner side surface of the inclined part 3, the other surface (the surface facing the center of the bottom plate) is thickened transversely to form a wavy scattering noise reduction surface 601, the structure further improves the noise reduction effect of the wing plate outside the vehicle, and meanwhile, the influence of multiple reflection on the noise inside the vehicle is reduced.
The damping vibration attenuation structure 4 comprises a hollow plane plate-shaped structure and a damping layer 403 arranged inside the hollow plane plate-shaped structure, the plane plate-shaped structure is parallel to the inclined part 3, the plane plate-shaped structure, the inclined part 3, the horizontal part 2 and the bottom plate 1 enclose a cavity 5, transverse vibration of the wing plate is greatly reduced, vibration energy is dissipated, secondary structure vibration sound radiation of the wing plate is reduced, and radiation noise outside the wing plate can be shielded.
Example two
On the basis of the first embodiment, the damping type low-noise trough beam for the high-speed railway comprises a base plate 1, wing plates symmetrically arranged on two sides of the base plate 1 along the length direction of the base plate 1, a curved surface scattering noise reduction structure 6 arranged on the inner sides of the wing plates, and a damping vibration reduction structure 4 arranged on the outer sides of the wing plates.
Wherein every the longitudinal section of pterygoid lamina is oblique T shape, including horizontal part 2 and the lower extreme of upper end and 1 end connection of bottom plate and the slope 3 that leans out, slope 3 inboard with bottom plate 1 forms 135 contained angles, and the pterygoid lamina leans out, has increased the inside width of channel beam, has weakened pneumatic load's harmful effects, has reduced the effort of aerodynamic force to the pterygoid lamina when sheltering from wheel rail noise and the aerodynamic noise of lower part, has improved the security performance of channel beam.
The horizontal part 2 has 6 surfaces, which are a first side surface 201, a second side surface 202, a third side surface 203, a top surface 204, a fourth side surface 205 and a fifth side surface 206 in sequence from the connection with the outer side surface of the inclined part 3, wherein the top surface 204 is a horizontal surface, the third side surface 203 and the fourth side surface 205 are vertical surfaces, the fifth side surface 206 is connected with the inner side surface of the inclined part 3, and the 6 surfaces form a diffraction surface with a certain width, so that the noise reduction effect is improved, and meanwhile, the diffraction surface can be designed in a targeted manner according to the frequency of the control noise.
Two opposite inclined planes 101 are formed downwards at two ends of the top surface of the bottom plate 1, the inner ends of the inclined planes 101 are connected with the bottom end of the outer side surface of the inclined part 3, and the outer ends of the inclined planes 101 are connected with the bottom end of the damping vibration attenuation structure 4.
The curved surface scattering noise reduction structure 6 is made of concrete, one surface of the curved surface scattering noise reduction structure is attached to the inner side surface of the inclined part 3, the other surface (the surface facing the center of the bottom plate) is thickened transversely to form a wavy scattering noise reduction surface 601, the structure further improves the noise reduction effect of the wing plate outside the vehicle, and meanwhile, the influence of multiple reflection on the noise inside the vehicle is reduced.
Damping vibration-damping structure 4 includes hollow plane platelike structure and sets up at its inside damping layer 403, plane platelike structure with slope 3 is parallel, plane platelike structure, slope 3, horizontal part 2 and bottom plate 1 enclose into a cavity 5, the transverse vibration of pterygoid lamina of having reduced of very big degree, has dissipated vibration energy, reduces the secondary structure vibration acoustic radiation of pterygoid lamina, can also shield the radiation noise in the pterygoid lamina outside.
EXAMPLE III
On the basis of the second embodiment, the damping type low-noise trough beam for the high-speed railway comprises a base plate 1, wing plates symmetrically arranged on two sides of the base plate 1 along the length direction of the base plate 1, a curved surface scattering noise reduction structure 6 arranged on the inner sides of the wing plates, and a damping vibration reduction structure 4 arranged on the outer sides of the wing plates.
Wherein every the longitudinal section of pterygoid lamina is oblique T shape, including horizontal part 2 and the lower extreme of upper end and 1 end connection of bottom plate and the slope 3 that leans out, 3 inboard of slope with bottom plate 1 forms 120 contained angles, and the pterygoid lamina leans out, has increased the inside width of channel beam, has weakened the harmful effects of pneumatic load, has reduced the effort of aerodynamic force to the pterygoid lamina when sheltering from wheel rail noise and the aerodynamic noise of lower part, has improved the security performance of channel beam.
The horizontal part 2 has 6 surfaces, which are a first side surface 201, a second side surface 202, a third side surface 203, a top surface 204, a fourth side surface 205 and a fifth side surface 206 in sequence from the connection with the outer side surface of the inclined part 3, wherein the top surface 204 is a horizontal surface, the third side surface 203 and the fourth side surface 205 are vertical surfaces, the fifth side surface 206 is connected with the inner side surface of the inclined part 3, and the 6 surfaces form a diffraction surface with a certain width, so that the noise reduction effect is improved, and meanwhile, the diffraction surface can be designed in a targeted manner according to the frequency of the control noise.
Two opposite inclined planes 101 are formed downwards at two ends of the top surface of the bottom plate 1, the inner ends of the inclined planes 101 are connected with the bottom end of the outer side surface of the inclined part 3, and the outer ends of the inclined planes 101 are connected with the bottom end of the damping vibration attenuation structure 4.
The curved surface scattering noise reduction structure 6 is made of concrete, one surface of the curved surface scattering noise reduction structure is attached to the inner side surface of the inclined part 3, the other surface (the surface facing the center of the bottom plate) is thickened transversely to form a wavy scattering noise reduction surface 601, the structure further improves the noise reduction effect of the wing plate outside the vehicle, and meanwhile, the influence of multiple reflection on the noise inside the vehicle is reduced.
The damping vibration attenuation structure 4 comprises an inner panel 402 close to the inclined part 3 and an outer panel 401 far away from the inclined part 3, which form a hollow plane plate-shaped structure, and the damping layer 403 is made of a high polymer material and is laid between the inner panel 402 and the outer panel 401. The cavity 5 is enclosed by the inner side face of the inner panel 402, the first side face 201, the inclined part 3 and the inclined plane 101 of the bottom plate 1, so that the transverse vibration of the wing plate is reduced to a great extent, the vibration energy is dissipated, the secondary structure vibration sound radiation of the wing plate is reduced, and the radiation noise outside the wing plate can be shielded.
In the damping vibration attenuation structure 4, the top end of the outer panel 401 is connected to the outer end of the first side surface 201 slightly inward, the bottom end is connected to the outer end of the inclined surface 101, and the included angle between the first side surface 201 and the inner panel 402 is 45 °.
The damping type low-noise trough beam for the high-speed railway can simultaneously give consideration to clearance requirements and structural noise vibration requirements, and is particularly suitable for sections where the high-speed railway passes through urban areas and must simultaneously meet internal and external noise limit values of vehicles.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (10)
1. A damping type low-noise trough beam for a high-speed railway is characterized in that: the damping noise reduction device comprises a bottom plate (1), wing plates, a curved surface scattering noise reduction structure (6) and a damping vibration reduction structure (4), wherein the wing plates are symmetrically arranged on two sides of the bottom plate (1) along the length direction of the bottom plate (1), the curved surface scattering noise reduction structure is arranged on the inner sides of the wing plates, and the damping vibration reduction structure is arranged on the outer sides of the wing plates;
the longitudinal section of each wing plate is in an inclined T shape and comprises a horizontal part (2) at the upper end and an inclined part (3) at the lower end, and the inclined part (3) is connected with the end part of the bottom plate (1) and is inclined outwards;
one surface of the curved surface scattering noise reduction structure (6) is attached to the inner side surface of the inclined part (3), and the other surface is thickened in the transverse direction to form a wavy scattering noise reduction surface (601);
the damping vibration attenuation structure (4) comprises a hollow plane plate-shaped structure and a damping layer (403) arranged in the hollow plane plate-shaped structure, the plane plate-shaped structure is parallel to the inclined part (3), and a cavity (5) is enclosed by the plane plate-shaped structure, the inclined part (3), the horizontal part (2) and the bottom plate (1).
2. The high speed railway damped low noise trough beam of claim 1, wherein: the horizontal part (2) extends to the outer side of the inclined part (3) for a length longer than the length extending to the inner side of the inclined part (3).
3. The damped low noise trough beam for high speed railways of claim 1 or 2, wherein: the horizontal part (2) is provided with 6 faces, a first side face (201), a second side face (202), a third side face (203), a top face (204), a fourth side face (205) and a fifth side face (206) are sequentially arranged from the connecting position of the horizontal part and the outer side face of the inclined part (3), the top face (204) is a horizontal plane, the third side face (203) and the fourth side face (205) are vertical faces, and the fifth side face (206) is connected with the inner side face of the inclined part (3).
4. The high speed railway damped low noise trough beam of claim 3, wherein: two opposite inclined planes (101) are formed downwards at two ends of the top surface of the bottom plate (1).
5. The high speed railway damped low noise trough beam of claim 4, wherein: the inner end of the inclined plane (101) is connected with the bottom end of the outer side face of the inclined part (3), and the outer end of the inclined plane is connected with the bottom end of the damping vibration attenuation structure (4).
6. The damped low noise trough beam for high speed railways of claim 4 or 5, wherein: the damping vibration attenuation structure (4) comprises an inner panel (402) close to the inclined part (3) and an outer panel (401) far away from the inclined part (3), and the damping layer (403) is laid between the inner panel (402) and the outer panel (401).
7. The high speed railway damped low noise trough beam of claim 6, wherein: the top end of the outer panel (401) is connected to the outer end of the first side surface (201) slightly inwards, and the bottom end of the outer panel is connected to the outer end of the inclined surface (101).
8. The high speed railway damped low noise trough beam of claim 7, wherein: the included angle between the first side surface (201) and the inner panel (402) is less than 90 degrees.
9. The high speed railway damped low noise trough beam of claim 1, wherein: the inner side of the inclined part (3) forms an included angle of 120-135 degrees with the bottom plate (1).
10. The high speed railway damped low noise trough beam of claim 9, wherein: the included angle formed by the inner side of the inclined part (3) and the bottom plate (1) is 120 degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911423316.0A CN110983943A (en) | 2019-12-31 | 2019-12-31 | Damping type low-noise trough beam for high-speed railway |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911423316.0A CN110983943A (en) | 2019-12-31 | 2019-12-31 | Damping type low-noise trough beam for high-speed railway |
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| CN104532739A (en) * | 2014-12-31 | 2015-04-22 | 铁道第三勘察设计院集团有限公司 | Steel bridge noise reduction device |
| CN104631354A (en) * | 2015-02-15 | 2015-05-20 | 青岛声达技术有限公司 | Sound absorbing device used for U-beam composite structure of light rail |
| CN204491389U (en) * | 2015-02-13 | 2015-07-22 | 济南轨道交通集团有限公司 | The prefabricated trough girder of track traffic punched-type thin-walled |
| CN109722978A (en) * | 2019-02-19 | 2019-05-07 | 上海市政工程设计研究总院（集团）有限公司 | A kind of vibration-damping noise-reduction type U-shaped beam for urban rail transit elevated |
| CN211571356U (en) * | 2019-12-31 | 2020-09-25 | 中国铁路设计集团有限公司 | Damping type low-noise trough beam of high-speed railway |
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2019
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100603906B1 (en) * | 2005-12-28 | 2006-07-24 | 한국철도시설산업 (주) | Pc girder bridge of u-type |
| CN203383133U (en) * | 2013-07-17 | 2014-01-08 | 铁道第三勘察设计院集团有限公司 | Simply supported U-shaped girder for noise reduction of high-speed rail |
| CN104005309A (en) * | 2014-05-10 | 2014-08-27 | 青岛科而泰环境控制技术有限公司 | Shearing type track damping noise reducing device |
| CN104532739A (en) * | 2014-12-31 | 2015-04-22 | 铁道第三勘察设计院集团有限公司 | Steel bridge noise reduction device |
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