CN113954890A - Noise reduction floor for railway vehicle - Google Patents
Noise reduction floor for railway vehicle Download PDFInfo
- Publication number
- CN113954890A CN113954890A CN202111329986.3A CN202111329986A CN113954890A CN 113954890 A CN113954890 A CN 113954890A CN 202111329986 A CN202111329986 A CN 202111329986A CN 113954890 A CN113954890 A CN 113954890A
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- CN
- China
- Prior art keywords
- noise reduction
- upper panel
- cavities
- panel
- corrugated plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
- B61D17/10—Floors
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
Abstract
The invention discloses a noise reduction floor for a railway vehicle, which comprises: the corrugated plate is provided with a plurality of micropores; the utility model discloses a high-frequency noise absorber, including upper panel, buckled plate and lower panel, upper panel, buckled plate and buckled plate are fixed connection in proper order from top to bottom, the upper panel is connected with the buckled plate and is formed a plurality of trough cavities, and the lower panel is connected with the buckled plate and is formed a plurality of crest cavities, it has the sound absorbing material of different acoustic impedance characteristics to fill respectively in trough cavity and the crest cavity for absorb or isolated high-frequency noise. The invention has the advantages of compact structure, simple manufacture, high mechanical strength, excellent sound insulation and sound absorption performance and the like.
Description
Technical Field
The invention belongs to the technical field of noise reduction of rail train bodies, and particularly relates to a noise reduction floor for a rail train.
Background
Nowadays, as the running speed of a high-speed train is continuously improved, the problem of train noise is increasingly serious, the riding comfort of people is influenced, high-intensity noise can bring irritation and fatigue to the body of passengers, and the passengers are in the noise for a long time and even damage the hearing of the people. Meanwhile, long-time noise has little threat to the health of train drivers and passengers, and the noise causes rapid fatigue of train personnel and even influences normal work of trains, so that the problem of controlling noise in high-speed trains is a problem which needs to be solved urgently.
At present, in order to realize the lightweight of a vehicle body structure, the main measure is to replace an interior floor with a corrugated plate, which consists of an upper plate, a lower plate and a middle corrugated plate. The sandwich structure of the corrugated board enables the stress of the panel to be uniformly dispersed, and the structure is prevented from generating concentrated load. It has good rigidity and strength, and can bear the weight of the car body with a thin thickness. But because the rigidity intensity of corrugated plate structure is great, and the quality is light, it is relatively poor to the sound insulation effect of bottom wheel rail noise. And the panel of the corrugated board is made of compact metal materials, so that the sound absorption effect on the noise in the vehicle is extremely poor.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defect of poor sound insulation and sound absorption performance of the built-in floor of the railway vehicle in the prior art, and provides the noise reduction floor of the railway vehicle, which has the advantages of compact structure, simplicity in manufacturing, high mechanical strength and excellent sound insulation and sound absorption performance.
In order to solve the technical problems, the invention adopts the following technical scheme:
a noise-reducing floor for a rail vehicle, comprising: the corrugated plate is provided with a plurality of micropores; the utility model discloses a high-frequency noise absorber, including upper panel, buckled plate and lower panel, upper panel, buckled plate and buckled plate are fixed connection in proper order from top to bottom, the upper panel is connected with the buckled plate and is formed a plurality of trough cavities, and the lower panel is connected with the buckled plate and is formed a plurality of crest cavities, it has the sound absorbing material of different acoustic impedance characteristics to fill respectively in trough cavity and the crest cavity for absorb or isolated high-frequency noise.
As a further improvement of the invention, air interlayers with adjustable thickness are arranged between the sound absorption material and the wave trough cavity and between the sound absorption material and the wave crest cavity, so that a series resonance sound absorption structure is formed among the sound absorption material, the upper panel and the corrugated plate and is used for absorbing low-frequency noise.
As a further improvement of the invention, a plurality of first micropores are uniformly distributed on the upper panel, and the diameter of each first micropore is 1-3 mm.
As a further improvement of the corrugated plate, second micropores are symmetrically arranged on two sides of a wave crest of the corrugated plate, and the diameter of each second micropore is 0.5-2.5 mm.
As a further improvement of the present invention, the diameter of the first micro-hole is greater than or equal to the diameter of the second micro-hole.
As a further improvement of the invention, the filling height of the sound absorption material in the wave trough cavities and the wave crest cavities is lower than or equal to the setting height of the second micropores on the corrugated plate.
As a further improvement of the invention, the sound absorption material is melamine or rock wool or rubber damping material.
As a further improvement of the invention, the preparation material of the upper panel and the lower panel is a metal material.
As a further improvement of the invention, the upper panel, the corrugated plate and the lower panel are fixedly connected by welding.
As a further improvement of the invention, the preparation materials of the upper panel and the lower panel are non-metal composite materials.
As a further improvement of the invention, the upper panel, the corrugated plate and the lower panel are fixedly connected by gluing.
Compared with the prior art, the invention has the advantages that:
according to the noise reduction floor for the railway vehicle, the upper panel and the corrugated pipe are respectively provided with the micropores, and the wave trough cavities formed by connecting the upper panel and the corrugated plates and the wave crest cavities formed by connecting the lower panel and the corrugated plates are respectively filled with the sound absorption materials with different acoustic impedance characteristics, so that the high-frequency noise is effectively absorbed or isolated; meanwhile, the crest bilateral symmetry of buckled plate is equipped with the second micropore for trough cavity and crest cavity UNICOM each other, and all there is thickness adjustable air interlayer between sound absorbing material and trough cavity and the crest cavity, also all reserved the air bed of certain thickness between sound absorbing material and top panel and the bellows promptly, make to constitute serial-type resonance sound absorbing structure between sound absorbing material and top panel and the buckled plate, realized the noise absorption of lower frequency and wider frequency channel. Further, micropore aperture size and range position on top panel and the buckled plate, and the cavity size of serial-type resonance sound absorption structure all are relevant with the frequency of the interior dominant noise of rail vehicle, and can adjust the cavity size of serial-type resonance sound absorption structure through changing the filled volume of sound absorbing material in each trough cavity and each crest cavity, the series combination of different cavities has been formed, diversified sound absorption structure has been obtained in the floor of making an uproar falls, the material of making an uproar falls in the acoustics and the characteristic of resonance structure, the sound insulation and the sound absorption performance on the floor of making an uproar fall have been showing to have improved, rail vehicle's the demand of making an uproar falls has been satisfied well, rail vehicle's riding comfort has been improved.
Drawings
Fig. 1 is a schematic structural diagram of the noise reduction floor for a railway vehicle according to the present invention.
FIG. 2 is a schematic cross-sectional structural diagram of the noise reduction floor for a railway vehicle according to the present invention.
FIG. 3 is a schematic structural diagram of a corrugated board in the noise reduction floor for a railway vehicle according to the present invention.
Illustration of the drawings: 1. an upper panel; 2. a lower panel; 3. a corrugated plate; 4. a first sound absorbing material; 5. a second sound absorbing material; 6. a first micropore; 7. a trough cavity; 8. a second micro-hole; 9. a wave crest cavity.
Detailed Description
The invention is further described below with reference to the drawings and specific preferred embodiments of the description, without thereby limiting the scope of protection of the invention.
Example 1
As shown in fig. 1 to 3, the noise reduction floor for a railway vehicle of the present invention includes: the corrugated plate comprises an upper panel 1, a lower panel 2 and a corrugated plate 3, wherein micropores are formed in the upper panel 1 and the corrugated plate 3, and the height of the corrugated plate 3 is 20 mm-40 mm. Upper panel 1, buckled plate 3 and lower panel 2 are fixed connection in proper order from top to bottom, and upper panel 1 is connected with buckled plate 3 and is formed a plurality of trough cavities 7, and lower panel 2 is connected with buckled plate 3 and is formed a plurality of crest cavities 9. The wave trough cavity 7 is filled with the first sound-absorbing material 4, the wave crest cavity 9 is filled with the second sound-absorbing material 5, the first sound-absorbing material 4 and the second sound-absorbing material 5 have different acoustic impedance characteristics respectively, but porous sound-absorbing materials can be adopted for absorbing or isolating high-frequency noise so as to reduce the noise of the railway vehicle. It is understood that, in the present embodiment, the high frequency noise refers to noise with a frequency of 1000Hz to 3000Hz, and the low frequency noise refers to noise with a frequency of 100Hz to 1000 Hz. It will be appreciated that the choice of the type of first and second sound absorbing materials 4, 5 and the location of the filling of the two sound absorbing materials in the valley and peak cavities 7, 9 is related to the frequency of the dominant noise of the vehicle. For example, a part with higher noise frequency can be selected to be a porous sound absorption material with better acoustic impedance characteristics, and the filling amount of the porous sound absorption material in the trough cavity 7 and the peak cavity 9 is increased to improve the noise reduction effect; at the part with lower noise frequency, the performance requirement on the porous sound absorption material can be reduced, and the filling amount of the porous sound absorption material in the wave trough cavity 7 and the wave crest cavity 9 is correspondingly adjusted, so that the requirement of noise reduction is met, and the manufacturing cost of the noise reduction floor is reduced. In the process of manufacturing the noise reduction floor, firstly, the porous sound absorption material is correspondingly cut according to the filling requirements in the wave trough cavities 7 and the wave crest cavities 9, and then the cut porous sound absorption material is filled into the corresponding wave trough cavities 7 or the wave crest cavities 9.
In this embodiment, air interlayers with adjustable thickness are respectively arranged between the sound absorbing material and the wave trough cavities 7 and the wave crest cavities 9, so that a series resonance sound absorbing structure is formed among the sound absorbing material, the upper panel 1 and the corrugated plate 3 and is used for absorbing low-frequency noise. As shown in fig. 2, the filling heights of the first sound absorbing materials 4 in the respective valley cavities 7 are different, the filling heights of the second sound absorbing materials 5 in the peak cavities 9 are also slightly different, and the sound absorbing materials do not completely fill the valley cavities 7 or the peak cavities 9, so that the sound absorbing materials, the upper panel 1 and the corrugated panel 3 constitute a series resonance sound absorbing structure, and noise of low frequency is propagated and absorbed in the series resonance sound absorbing structure. It can be understood that the filling height of the sound-absorbing material in the wave trough cavity 7 or the wave crest cavity 9 can be adjusted according to the actual noise reduction requirement, so as to adjust the volume of the cavity of the series resonance sound-absorbing structure and absorb noise in a wider frequency band.
In this embodiment, the upper panel 1 is uniformly distributed with a plurality of first micropores 6, and the diameter of the first micropores 6 is 1mm to 3 mm. The wave crest both sides symmetry of buckled plate 3 is equipped with second micropore 8, and the diameter of second micropore 8 is 0.5mm ~ 2.5 mm. Further, the diameter of the first micropores 6 is 0.5mm larger than the diameter of the second micropores 8. According to the impedance matching principle, the aperture of the first micropore 6 serving as the front opening is larger than or equal to the aperture of the second micropore 8 serving as the rear opening, so that the sound absorption peak value is favorably improved, and the noise absorption effect is improved.
In the present embodiment, the filling level of the first sound-absorbing material 4 in the valley cavities 7 and the filling level of the second sound-absorbing material 5 in the peak cavities 9 are lower than or equal to the setting level of the second micro-holes 8 on the corrugated plate 3. So as to ensure the mutual communication of the wave trough cavity 7 and the wave crest cavity 9, and a series resonance sound absorption structure is formed between the sound absorption material and the upper panel 1 and the corrugated plate 3, thereby realizing the noise absorption of lower frequency and wider frequency band.
In this embodiment, the sound absorbing material may be melamine, rock wool, or a rubber damping material. Further, the first sound absorbing material 4 is made of melamine, and the second sound absorbing material 5 is made of rock wool. The first sound absorbing material 4 and the second sound absorbing material 5 are made of materials with different acoustic impedance characteristics, so that high-frequency noise can be better absorbed or isolated.
In this embodiment, the upper panel 1, the lower panel 2, and the corrugated plate 3 are made of a metal material, such as an aluminum alloy material, and have the characteristics of high mechanical strength, corrosion resistance, excellent welding performance, and the like. Correspondingly, the upper panel 1, the corrugated plate 3 and the lower panel 2 are fixedly connected by welding.
It is understood that in other embodiments, the upper panel 1, the lower panel 2 and the corrugated plate 3 may be made of non-metal composite materials, such as carbon fiber composite materials, which have excellent mechanical properties, and not only retain the inherent characteristics of carbon materials, but also have the soft workability of textile fibers, thereby realizing the light weight design of the noise reduction floor. Correspondingly, the upper panel 1, the corrugated plate 3 and the lower panel 2 are fixedly connected by gluing.
In this embodiment, all set up the micropore on upper panel 1 and bellows 3 to in the trough cavity 7 that upper panel 1 and buckled plate 3 are connected and are formed and the crest cavity 9 that lower panel 2 and buckled plate 3 are connected and are formed are filled with the first sound absorbing material and the second sound absorbing material of different acoustic impedance characteristics respectively, have effectively realized absorbing or isolated high frequency noise. Meanwhile, the crest bilateral symmetry of buckled plate 3 is equipped with second micropore 8 for trough cavity 7 and crest cavity 9 UNICOM each other, and all there is the air interlayer of adjustable thickness between sound absorbing material and trough cavity 7 and crest cavity 9, also all reserved the air bed of certain thickness between sound absorbing material and top panel 1 and the bellows 3, make and constituted serial-type resonance sound absorbing structure between sound absorbing material and top panel 1 and buckled plate 3, realized the noise absorption of more low frequency and wider frequency channel. Further, the pore size and the arrangement position of micropores on the upper panel 1 and the corrugated plate 3 and the size of a cavity of the serial resonance sound absorption structure are related to the frequency of main noise in the rail vehicle, and the size of the cavity of the serial resonance sound absorption structure can be adjusted by changing the filling volume of the sound absorption material in each wave trough cavity 7 and each wave crest cavity 9, so that the serial combination of different cavities is formed, diversified sound absorption structures are obtained in the noise reduction floor, the characteristics of the acoustic noise reduction material and the resonance structure are combined, the sound insulation and sound absorption performance of the noise reduction floor are obviously improved, and the noise reduction requirement of the rail vehicle is well met.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or equivalent modifications, without departing from the spirit and scope of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention.
Claims (11)
1. A noise-reducing floor for a rail vehicle, comprising: the corrugated plate comprises an upper panel (1), a lower panel (2) and a corrugated plate (3), wherein micropores are formed in the upper panel (1) and the corrugated plate (3); upper panel (1), buckled plate (3) and lower panel (2) are fixed connection from top to bottom in proper order, upper panel (1) is connected with buckled plate (3) and is formed a plurality of trough cavities (7), and lower panel (2) are connected with buckled plate (3) and are formed a plurality of crest cavities (9), the sound absorbing material that has different acoustic impedance characteristics is filled respectively in trough cavity (7) and crest cavity (9) for absorb or isolated high frequency noise.
2. The noise reduction floor for railway vehicles according to claim 1, characterized in that air separation layers with adjustable thickness are arranged between the sound absorption material and the wave trough cavities (7) and the wave crest cavities (9) so as to realize that a series resonance sound absorption structure is formed among the sound absorption material, the upper panel (1) and the corrugated plates (3) and is used for absorbing low-frequency noise.
3. The noise reduction floor for the railway vehicle as claimed in claim 2, wherein a plurality of first micropores (6) are uniformly distributed on the upper panel (1), and the diameter of each first micropore (6) is 1-3 mm.
4. The noise reduction floor for railway vehicles according to claim 3, characterized in that the corrugated plate (3) is symmetrically provided with second micropores (8) on both sides of the wave crest, and the diameter of the second micropores (8) is 0.5 mm-2.5 mm.
5. Rail vehicle noise reduction floor according to claim 4, characterized in that the diameter of the first micro-holes (6) is greater than or equal to the diameter of the second micro-holes (8).
6. The noise reduction floor for railway vehicles according to claim 4, characterized in that the filling height of the sound-absorbing material in the valley cavities (7) and the peak cavities (9) is lower than or equal to the setting height of the second micro-holes (8) on the corrugated sheet (3).
7. The rail vehicle noise reduction floor of any one of claims 1 to 6, wherein the sound absorbing material is melamine or rock wool or a rubber damping material.
8. The noise reduction floor for railway vehicles according to any one of claims 1 to 6, characterized in that the upper panel (1), the lower panel (2) and the corrugated plate (3) are made of metal materials.
9. The noise reduction floor for railway vehicles according to claim 8, characterized in that the upper panel (1), the corrugated plate (3) and the lower panel (2) are fixedly connected by welding.
10. The noise reduction floor for railway vehicles according to any one of claims 1 to 6, characterized in that the upper panel (1), the lower panel (2) and the corrugated plate (3) are all made of non-metallic composite materials.
11. The noise reduction floor for railway vehicles according to claim 10, characterized in that the upper panel (1), the corrugated plate (3) and the lower panel (2) are fixedly connected by gluing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111329986.3A CN113954890B (en) | 2021-11-10 | 2021-11-10 | Noise reduction floor for railway vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111329986.3A CN113954890B (en) | 2021-11-10 | 2021-11-10 | Noise reduction floor for railway vehicle |
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| CN113954890A true CN113954890A (en) | 2022-01-21 |
| CN113954890B CN113954890B (en) | 2023-08-01 |
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| CN112477894A (en) * | 2020-12-09 | 2021-03-12 | 中车青岛四方机车车辆股份有限公司 | Noise reduction structure and noise reduction design method for aluminum alloy section of vehicle body and vehicle body |
| CN213038228U (en) * | 2020-07-08 | 2021-04-23 | 北京市高速公路交通工程有限公司 | Sound absorbing element barrier for wide-tone noise |
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2021
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| CN1807761A (en) * | 2006-02-16 | 2006-07-26 | 上海交通大学 | Microporous foam double-side absorbing sound type ultra-thin barrier |
| CA2808903A1 (en) * | 2010-09-02 | 2012-03-08 | United States Gypsum Company | Lightweight acoustical flooring underlayment |
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