CN213705430U - Rail vehicle floor and side wall integrated configuration - Google Patents
Rail vehicle floor and side wall integrated configuration Download PDFInfo
- Publication number
- CN213705430U CN213705430U CN202022187481.5U CN202022187481U CN213705430U CN 213705430 U CN213705430 U CN 213705430U CN 202022187481 U CN202022187481 U CN 202022187481U CN 213705430 U CN213705430 U CN 213705430U
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- Prior art keywords
- floor
- layer
- sound
- rail vehicle
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- 229920000742 Cotton Polymers 0.000 claims abstract description 22
- 238000010521 absorption reaction Methods 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 7
- 230000001629 suppression Effects 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 16
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 230000002829 reduced Effects 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000005755 formation reaction Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 76
- 239000000463 material Substances 0.000 description 13
- 229910052782 aluminium Inorganic materials 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound 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- 230000002265 prevention Effects 0.000 description 1
Abstract
The utility model discloses a rail vehicle floor and side wall integrated configuration, include the section bar floor and connect in the section bar side wall at section bar floor along rail vehicle width direction both ends, the upper surface on section bar floor is equipped with a plurality of bellied cavity rigid support seats up, a plurality of rigid support seats are along rail vehicle's width direction interval arrangement, section bar floor upper surface upper berth between two adjacent rigid support seats is equipped with the cotton layer of first sound absorption, be equipped with the damping pad on the rigid support seat, floor laying is on the upper surface of a plurality of damping pads in the car, two adjacent damping pads, enclose between floor and the first cotton layer of first sound absorption and close formation air bed in the car. The rigid lower supporting seat and the vibration damping pad form an elastic supporting seat, so that the transmission of structural vibration from bottom to top can be effectively reduced, and the structural sound transmission is inhibited. The combination of the sound absorption layer and the air layer laid between the floor in the vehicle and the section floor has high-efficiency sound insulation and environmental protection performances.
Description
Technical Field
The utility model relates to a technical field of making an uproar falls in the rail vehicle especially relates to a rail vehicle floor and side wall integrated configuration.
Background
Noise in the rail transit vehicle seriously affects riding comfort of passengers and driving emotion of drivers, and becomes a problem which restricts the speed of the train and must be faced and solved. The noise sources in the train mainly comprise wheel-rail noise, aerodynamic noise, current collection noise of a current collection system and structure noise, wherein the wheel-rail noise is still an important source of high-speed railway noise. Researches show that vibration generated by the underframe equipment and the wheel rails transmits sound through the floor and the side wall, and air transmission of noise of the wheel rails, pneumatic noise and traction transmission system noise through the floor and the side wall is an important influence factor influencing noise in the car, and the vibration noise of a passenger room area above the underframe vibration noise source equipment (a bogie, a transformer, a converter and the like) is higher than that of other passenger room areas. The vibration reduction and sound insulation performance of the floor and the side wall in the chassis vibration noise source area is improved, and the method has important significance for improving the acoustic comfort of drivers and passengers.
Along with the popularization of aluminum alloy extruded profile car bodies, various composite floor and side wall structures taking hollow aluminum profiles as main bodies are produced, and the train floor and side wall structures gradually develop towards the direction of vibration and noise reduction while considering light weight. However, aiming at the special vibration and sound field environment of the vibration noise source of the train underframe, at present, a composite structure of the floor and the side wall, which can effectively solve the problem that the vibration noise of the passenger room above the underframe vibration noise source equipment is too large locally and simultaneously meets the lightweight design requirement, does not exist.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art's is not enough, provides a rail vehicle floor and side wall integrated configuration who effectively weakens chassis vibration noise source equipment top guest room vibration noise.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a rail vehicle floor and side wall integrated configuration, includes the section bar floor and connects in the section bar side wall at section bar floor along rail vehicle width direction both ends, the top on section bar floor is equipped with floor in the car, the upper surface on section bar floor is equipped with a plurality of bellied rigid support seats up, the rigid support seat is hollow structure, and a plurality of rigid support seats are arranged along rail vehicle's width direction interval, and section bar floor upper surface upper berth between two adjacent rigid support seats is equipped with first sound absorption cotton layer, is equipped with the damping pad on the rigid support seat, and on the upper surface of laying a plurality of damping pads on the floor in the car, enclose between two adjacent damping pads, floor in the car and the first sound absorption cotton layer and close and form first air bed.
The die cavity rigidity lower carriage that floor section bar roof upper surface set up links to each other with the damping pad upper support and forms the elastic support seat, can effectively reduce the transmission of structural vibration from bottom to top, restraines the structure transaudient, and the supporting seat installation is simple stable firm moreover.
The combination of the sound absorption layer and the air layer laid between the floor and the profile floor in the vehicle has high-efficiency sound insulation and environmental protection performances, the composite structure containing the air layer reduces the total weight of the structure while improving the sound insulation quantity, and the light-weight design requirement of the floor is met.
As a further improvement of the above technical solution:
and a first damping layer for inhibiting medium-high frequency vibration sound is arranged on the lower surface of the sectional material floor. The first damping layer is preferably a water-based damping coating layer.
And a second damping layer for restraining the sectional material floor is arranged between the sectional material floor and the first sound absorption cotton layer. The second damping layer is preferably made of a viscoelastic damping material, and has a good sound insulation effect at low frequency and high frequency.
A first sound-insulating felt layer is arranged between the vibration-damping pad and the floor in the vehicle.
And a rubber cushion layer is connected between the rigid supporting seat and the vibration damping pad.
A first inner decoration layer is paved on the upper surface of the floor in the vehicle.
The second sound-absorbing cotton layer is laid on the inner wall surface of the side wall of the section bar and extends downwards to the first sound-absorbing cotton layer at the corresponding end part of the section bar floor to be connected with the section bar floor.
And a second sound-insulating felt layer is arranged between the second sound-absorbing cotton layer and the side wall of the section bar.
And the second sound-proof felt layer is connected with the side wall of the section bar through a third damping layer. The third damping layer is preferably made of a viscoelastic damping material, and based on the transmission rule of vibration noise in the bogie area, the sound insulation effect of low frequency and high frequency of the side wall can be improved, and meanwhile, the lightweight design requirement of the side wall can be met.
The inboard of second sound-proof felt layer is equipped with the second interior trim layer with second sound-proof felt layer parallel arrangement, the second interior trim layer is connected between section bar floor and rail vehicle roof, enclose between second sound-proof felt layer, second interior trim layer, section bar floor and the rail vehicle roof and close and form the second air bed.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses a rail vehicle floor and side wall integrated configuration, to the regional special vibration of chassis vibration noise source and sound field environment, according to the characteristic of chassis vibration noise source equipment vibration noise transmission, route and lightweight design requirement, with high performance damping material, sound-proof material, sound absorbing material and air bed and aluminium alloy verify according to brand-new combination level, obtain a floor and side wall damping sound insulation composite construction who effectively weakens chassis vibration noise source equipment top guest room vibration noise, overcome the not enough or poor shortcoming of floor side wall combination equivalent sound insulation of single floor sound insulation.
Drawings
Fig. 1 is a sectional view of the combination structure of the floor and the side wall of the railway vehicle according to the embodiment.
Fig. 2 is a cross-sectional view of the floor structure of fig. 1.
Fig. 3 is a cross-sectional view of the sidewall structure in fig. 1.
FIG. 4 is a comparative illustration of a damping patch sound insulation spectrum curve test.
FIG. 5 is a comparative illustration of a sound insulation spectrum curve test of a floor structure.
Illustration of the drawings: 1. a first damping layer; 2. a profile floor; 3. a second damping layer; 4. a first sound absorbing cotton layer; 5. a first air layer; 6. a rigid support base; 7. a rubber cushion layer; 8. a vibration damping pad; 9. a first sound-deadening felt layer; 10. a floor in the vehicle; 11. a first interior layer; 12. a profile side wall; 13. a third damping layer; 14. a second sound-deadening felt layer; 15. a second sound absorbing cotton layer; 16. a second air layer; 17. a second inner decoration layer.
Detailed Description
The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.
Example 1:
as shown in fig. 1, the floor and side wall combination structure of the rail vehicle in this embodiment includes a floor structure and side wall structures connected to both ends of the floor structure in the width direction of the rail vehicle.
The floor structure comprises a section floor 2 made of aluminum and having a thickness of 60-80mm and an interior floor 10 provided above the section floor 2.
As shown in fig. 2, a first damping layer 1 for suppressing middle and high frequency vibration sound is sprayed on the lower surface of the profile floor 2 in a thickness of 3 mm. The first damping layer 1 is a water-based damping coating layer, preferably a water-based damping coating with the model number of SVE005 produced by Hualian high-tech, Limited liability company of Zhou province.
The upper surface of the section bar floor 2 is provided with a plurality of rigid supporting seats 6 which are raised upwards (the height is 30-40mm), and the rigid supporting seats 6 are of hollow structures and are integrally formed with the section bar floor 2. The rigid supporting seats 6 are arranged at intervals in the width direction of the railway vehicle, a second damping layer 3 which is 1mm and is provided with a constraint section floor 2 is adhered to the upper surface of the section floor 2 between every two adjacent rigid supporting seats 6, the second damping layer 3 is preferably made of viscoelastic damping materials, the thickness of the second damping layer is 1mm, the thickness of the viscoelastic damping material layer is 0.8mm, and the thickness of the constraint aluminum plate is 0.2 mm. The aluminum profile has good sound insulation effect at low frequency and high frequency, and test results show that the viscoelastic damping material layer of the 1mm constraint aluminum plate increases the sound insulation amount of the aluminum profile by about 1.6dB, as shown in figure 4. The first sound absorption cotton layer 4 with the cold-proof performance and the thickness of 30-40mm is paved on the second damping layer 3, and the first sound absorption cotton layer 4 is preferably made of carbon fiber cotton.
The rigid supporting seat 6 is connected with a silica gel vibration damping pad 8 with the thickness of 10-20mm through a rubber cushion layer 7 layer, and the lower support of the silica gel vibration damping pad is connected with the rigid supporting seat through a rubber cushion to form an elastic supporting seat. A first sound-proof felt layer 9 having a fire-proof property and having a thickness of 1-3mm is laid on the upper surfaces of the plurality of vibration-proof pads 8, as shown in FIG. 5, and the noise of the passenger compartment above the chassis vibration noise source equipment can be reduced by 0.6dB by laying the sound-proof felt. The vehicle interior floor 10 is laid on the first sound-proof felt layer 9, the vehicle interior floor 10 is made of fiber reinforced composite materials with the thickness of 15-20mm, a first inner decoration layer 11 is laid on the upper surface of the vehicle interior floor 10, and the first inner decoration layer 11 is rubber floor cloth with the thickness of 2.5-3 mm. A first air layer 5 with the thickness of 10-20mm is formed by the enclosure among two adjacent damping cushions 8, the first sound-insulating felt layer 9 and the first sound-absorbing cotton layer 4.
The aluminium die cavity rigidity lower supporting seat that floor aluminium alloy roof upper surface was reserved links to each other through rubber damping pad with silica gel damping pad upper support and forms elastic support seat, can effectively reduce the transmission of structural vibration from bottom to top, restraines the structure and passes through the sound, and the supporting seat installation is simple stable firm moreover.
The cold-proof sound absorbing material layer and the air bed combination of laying between floor elastic damping material layer and the fire prevention sound deadening felt layer have efficient sound insulation environmental protection performance, and the composite construction who contains the air bed has reduced the gross weight of structure when improving the sound insulation volume, satisfies floor lightweight design requirement.
As shown in fig. 3, the side wall structure includes an aluminum profile side wall 12 (with a thickness of 40-60mm) connected to the corresponding end of the profile floor 2 in the width direction of the rail vehicle, and a second inner finishing layer 17 provided inside the profile side wall 12, the second inner finishing layer 17 being connected between the first inner finishing layer 11 and the roof of the rail vehicle, and the second inner finishing layer 17 being a glass fiber reinforced plastic inner finishing layer with a thickness of 1-3 mm. A third damping layer 13, a second sound-insulating felt layer 14 (with the thickness of 1-3mm), a second sound-absorbing cotton layer 15 (with the thickness of 40-50mm) and a second air layer 16 (with the thickness of 20-30mm) are sequentially arranged between the profile side wall 12 and the second interior trim layer 17. And a second air layer 16 is formed by the enclosure among the second sound-proof felt layer 14, the second inner decoration layer 17, the profile floor 2 and the roof of the railway vehicle.
The third damping layer 13 is made of a viscoelastic damping material for restraining the aluminum plate, the third damping layer 13 is bonded to the area, below the car window, of the inner surface of the aluminum profile side wall 12, the thickness of the third damping layer is preferably 1mm, and based on the transmission rule of vibration noise of a bogie area, the sound insulation effect of low frequency and high frequency of the side wall can be improved, and meanwhile the lightweight design requirement of the side wall can be met.
The rail vehicle floor and side wall composite structure of the embodiment is particularly suitable for being arranged in a chassis vibration noise source area, and a longitudinal laying area of a vibration and noise reduction floor and a side wall is as follows: the noise reduction structure extends outwards for a certain distance along the center of the chassis vibration noise source, so that the noise of a passenger room above the chassis vibration noise source equipment is reduced by 2-3dB (A), and therefore, high-quality vibration reduction and noise reduction structures do not need to be arranged on the floor and the side walls, and the driving comfort of drivers and passengers is greatly improved.
The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.
Claims (10)
1. A rail vehicle floor and side wall combined structure comprises a section bar floor (2) and section bar side walls (12) connected to two ends of the section bar floor (2) along the width direction of a rail vehicle, an in-vehicle floor (10) is arranged above the section bar floor (2), it is characterized in that the upper surface of the section bar floor (2) is provided with a plurality of rigid supporting seats (6) which are raised upwards, rigid support seat (6) are hollow structure, a plurality of rigid support seats (6) are arranged at intervals along the width direction of rail vehicle, a first sound absorption cotton layer (4) is paved on the upper surface of a section bar floor (2) between two adjacent rigid support seats (6), a vibration absorption pad (8) is arranged on each rigid support seat (6), a floor (10) is paved on the upper surface of a plurality of vibration absorption pads (8) in the vehicle, and a first air layer (5) is formed by enclosing between two adjacent vibration absorption pads (8), the floor (10) in the vehicle and the first sound absorption cotton layer (4).
2. The rail vehicle floor and side wall composite structure according to claim 1, wherein the lower surface of the profile floor (2) is provided with a first damping layer (1) for suppressing medium-high frequency vibration sound.
3. A rail vehicle floor and side wall combination according to claim 1, characterised in that a second damping layer (3) is provided between the profiled floor (2) and the first sound-absorbing cotton layer (4) which constrains the profiled floor (2).
4. A rail vehicle floor and side wall combination according to claim 1, characterised in that a first sound-insulating felt layer (9) is provided between the damping mat (8) and the vehicle interior floor (10).
5. A rail vehicle floor and side wall combination according to claim 1, characterised in that a rubber cushion layer (7) is connected between the rigid support base (6) and the damping pad (8).
6. The rail vehicle floor and side wall combination according to claim 1, wherein a first interior finishing layer (11) is applied to the upper surface of the interior floor (10).
7. A rail vehicle floor and side wall combination according to any one of claims 1-6, characterised in that the profile side wall (12) is provided with a second sound-absorbing cotton layer (15) on its inner wall surface, which second sound-absorbing cotton layer (15) extends down to the connection with the first sound-absorbing cotton layer (4) at the respective end of the profile floor (2).
8. A rail vehicle floor and side wall combination according to claim 7, characterised in that a second sound-insulating felt layer (14) is provided between the second sound-absorbing cotton layer (15) and the profile side wall (12).
9. A rail vehicle floor and side wall combination according to claim 8, characterized in that the second sound-deadening felt layer (14) and the profile side wall (12) are connected by a third damping layer (13).
10. The rail vehicle floor and side wall combination according to claim 8, wherein the second acoustic felt layer (14) is provided on its inner side with a second inner finishing layer (17) arranged in parallel with the second acoustic felt layer (14), the second inner finishing layer (17) being connected between the profile floor (2) and the rail vehicle roof, and a second air layer (16) being formed by the second acoustic felt layer (14), the second inner finishing layer (17), the profile floor (2) and the rail vehicle roof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022187481.5U CN213705430U (en) | 2020-09-29 | 2020-09-29 | Rail vehicle floor and side wall integrated configuration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022187481.5U CN213705430U (en) | 2020-09-29 | 2020-09-29 | Rail vehicle floor and side wall integrated configuration |
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| CN213705430U true CN213705430U (en) | 2021-07-16 |
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| CN202022187481.5U Active CN213705430U (en) | 2020-09-29 | 2020-09-29 | Rail vehicle floor and side wall integrated configuration |
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