CN108086065A - A kind of rail resonance sound-absorbing device - Google Patents
A kind of rail resonance sound-absorbing device Download PDFInfo
- Publication number
- CN108086065A CN108086065A CN201711178789.XA CN201711178789A CN108086065A CN 108086065 A CN108086065 A CN 108086065A CN 201711178789 A CN201711178789 A CN 201711178789A CN 108086065 A CN108086065 A CN 108086065A
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- CN
- China
- Prior art keywords
- rail
- absorbing device
- shell
- resonance sound
- resonant cavity
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Classifications
-
- 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
Abstract
To realize that multiband noise absorbent and absorption frequency are controllable, good inhibitory action is played to the rail noise under the conditions of train operation for a kind of rail resonance sound-absorbing device.It includes：Shell surrounds between the rail both sides web of the rail and the flange of rail, with Rail Surface and forms closed cavity；Resonant absorber is fixedly installed on the inner wall of shell, several resonant cavity units are inside distributed with, and each resonant cavity unit is communicated by its air duct with closed cavity.
Description
Technical field
The present invention relates to track traffic, more particularly to a kind of rail resonance sound-absorbing device.
Background technology
The noise that rail traffic vehicles induce in the overhead and highdensity operational process in tunnel causes serious noise
Pollution, affects the production and living of track subjective reflection, while noise transmission is to also affecting track traffic passenger's in compartment
Ride comfort sexual experience.Existing rail noise reduction technology is broadly divided into active noise reduction techniques and passive noise reduction technology.Active noise reduction
Technology is mainly by reducing noise source, and control sound source is vibrated to reduce noise, such as damping-constraining steel rail and rail dynamic absorber
Device etc., existing rail damper can only often decay noise caused by high-frequency vibration, and low-frequency noise can not be handled, and steel
Rail dynamic vibration absorber is only capable of inhibiting the vibration at rail intrinsic frequency, and active noise reduction techniques difficulty is big, with high costs；Passive drop
Technology of making an uproar is mainly the propagation path by cutting off noise, and obstruction makes an uproar sonic propagation to reduce noise, such as sound barrier, technology by
In using porous sound absorption principle, it is difficult to realize the absorption of specific frequency noise more, noise reduction is restricted, and in tunnel
Installation space is restricted.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of rail resonance sound-absorbing device, to realize that multiband noise is inhaled
It receives and absorption frequency is controllable, good inhibitory action is played to the rail noise under the conditions of train operation
The technical solution adopted by the present invention to solve the technical problems is as follows：
A kind of rail resonance sound-absorbing device of the present invention, it is characterized in that it includes：Shell surrounds the rail both sides web of the rail and rail
Closed cavity is formed between bottom, with Rail Surface；Resonant absorber is fixedly installed on the inner wall of shell, if being inside distributed with
Dry resonant cavity unit, each resonant cavity unit are communicated by its air duct with closed cavity.
The invention has the advantages that simple in structure, compact in design, can realize rail multiband noise absorbent, sound absorption
Excellent effect has good application prospect.
Description of the drawings
This specification includes following seven width attached drawing：
Fig. 1 is a kind of cross-section diagram of rail resonance sound-absorbing device of the present invention；
Fig. 2 is the enlarged drawing of A parts in Fig. 1；
Fig. 3 is the expanded view of resonator in a kind of rail resonance sound-absorbing device of the present invention；
Fig. 4 is the cross-section diagram of resonator in a kind of rail resonance sound-absorbing device of the present invention；
Fig. 5 is a kind of cross-section diagram of rail resonance sound-absorbing device of the present invention；
Fig. 6 is the enlarged drawing of B parts in Fig. 5；
Fig. 7 is the mounting means schematic diagram of shell in a kind of rail resonance sound-absorbing device of the present invention；
Component and corresponding mark are shown in figure：Rail 10, shell 20, closed cavity 21, adhesive linkage 22, elastic insert
23rd, air duct 31, resonant cavity unit 32, shell structure 33, circular pipe type boss 34, pedestal 35, cover board 36.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
Referring to Figures 1 and 2, a kind of rail resonance sound-absorbing device of the invention includes：Shell 20 surrounds 10 liang of siding tracks of rail
Closed cavity 21 is formed between waist and the flange of rail, with 10 surface of rail；Resonant absorber is fixedly installed on the inner wall of shell 20,
Several resonant cavity units 32 are distributed in it, each resonant cavity unit 32 is communicated by its air duct 31 with closed cavity 21.
When rail 10 is subject to dynamic excitation to generate vibration and radiated noise, the air column in air duct 31 is subject to the excitation of sound wave to generate
Vibration, when the frequency of sound wave and the close design frequency of resonator, air column generates resonance in air duct 31, passes through gas
Friction between column and hole wall converts vibrational energy into thermal energy consumption and dissipates, so as to reach sound absorption effect.
With reference to Fig. 4, the volume of resonant cavity unit 32 is V, and a diameter of S of air duct 31, depth L enter when there is sound wave
When penetrating, when the depth in hole and much smaller aperture ratio wave length of sound, the flexible deformation very little of air column in aperture can be examined not
Consider, thus can be handled using air column as mass block, the air in resonant cavity unit 32 is due to compressibility, playing sky
The effect of gas spring forms a vibrational system for being similar to spring oscillator, between air column resonance frequency and resonator dimensions
Shown in relation the following formula, wherein A is 31 area of air duct：
When being vibrated under excitation of the air column in air duct 31 in external sound wave, due to rubbing between air column and hole wall
Wiping acts on, and situation at this moment is equivalent to an air spring system for having damping.Due to the effect of damping, make the vibration of air column
Energy is gradually converted to thermal energy and loses, i.e., absorbs acoustic energy due to friction loss.If the frequency of incident acoustic wave and this
The intrinsic frequency of system is identical, and the air column of air duct 31 generates high vibration due to resonating, the acoustic energy being at this moment lost
Reach maximum.It is believed that the sound wave injected in air duct 31 is absorbed by resonant cavity, so as to reach maximum sound absorption effect
Fruit.
It follows that the resonant absorber of the invention being arranged on outside the 10 both sides web of the rail of rail and the flange of rail is by setting resonant cavity
31 size of unit 32 and air duct, you can different rail radiated noise frequencies is matched, so as to fulfill multiband rail noise
Control, high frequency noise, the limit value to low frequency noise low effort can only be cut down by breaching previous steel rail vibration damping structure, to train
Rail noise under service condition plays good inhibitory action.
With reference to Fig. 1 and Fig. 3, generally implement in 20 internal resonance sound absorber of shell by three entities, in the 10 both sides web of the rail of rail
Outer each setting one, air duct 31 face the web of the rail surface of rail 10 and flange of rail surface, another is arranged on 10 rail of rail
Below bottom, air duct 31 faces flange of rail bottom surface.With reference to Fig. 7, the upper end of the shell 20 and the 10 both sides web of the rail of rail can be with
It is fixedly connected by adhesive linkage 22, elastic insert 23 is set on the inside of adhesive portion.
Referring to Figures 1 and 2, the body of the resonant absorber be shell structure 33, in be separated into out by parting bead it is several
Resonant cavity unit 32 corresponds to each resonant cavity unit 32 on 33 outer wall of shell structure and sets circular pipe type boss 34, circular pipe type boss
34 endoporus forms air duct 31.With reference to Fig. 5 and Fig. 6, the body of the resonant absorber by pedestal 35 and can be also fixed on
The cover board 36 of its front end is formed, several resonant cavity units 32 of distribution in pedestal 35, is offered and each resonant cavity unit on cover board 36
32 through holes communicated form air duct 31.
The above simply explains through diagrams a kind of some principles of rail resonance sound-absorbing device of the present invention, be not intended to by
Shown in the present invention is confined to and in the concrete structure and the scope of application, thus it is every it is possible that the corresponding modification being utilized with
And equivalent, belong to the apllied the scope of the claims of the present invention.
Claims (4)
1. a kind of rail resonance sound-absorbing device, it is characterized in that it includes：Shell (20) surrounds rail (10) the both sides web of the rail and rail
Closed cavity (21) cavity is formed between bottom, with rail (10) surface；Resonant absorber is fixedly installed on the inner wall of shell (20)
On, several resonant cavity units (32) are inside distributed with, each resonant cavity unit (32) passes through its air duct (31) and confined air
Chamber (21) communicates.
2. a kind of rail resonance sound-absorbing device as described in claim 1, it is characterized in that：The body of the resonant absorber is shell
Body structure (32), it is interior that several resonant cavity units (32) are separated into out by parting bead, correspond on shell structure (33) outer wall each common
The chamber unit (32) that shakes sets circular pipe type boss (34), and the endoporus of circular pipe type boss (34) forms air duct (31).
3. a kind of rail resonance sound-absorbing device as described in claim 1, it is characterized in that：The body of the resonant absorber is the bottom of by
Seat (35) and cover board (36) composition for being fixed on its front end, the interior several resonant cavity units (32) of distribution of pedestal (35), cover board (36)
On offer the through hole that is communicated with each resonant cavity unit (32) and form air duct (31).
4. a kind of rail resonance sound-absorbing device as described in claim 1, it is characterized in that：The upper end of the shell (20) and rail
(10) the both sides web of the rail is fixedly connected by adhesive linkage (22), and elastic insert (23) is set on the inside of adhesive portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711178789.XA CN108086065A (en) | 2017-11-23 | 2017-11-23 | A kind of rail resonance sound-absorbing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711178789.XA CN108086065A (en) | 2017-11-23 | 2017-11-23 | A kind of rail resonance sound-absorbing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108086065A true CN108086065A (en) | 2018-05-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711178789.XA Pending CN108086065A (en) | 2017-11-23 | 2017-11-23 | A kind of rail resonance sound-absorbing device |
Country Status (1)
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| CN (1) | CN108086065A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109468895A (en) * | 2018-11-26 | 2019-03-15 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | For the vibration damping acoustic absorptive member of track and with its package system |
| CN110184861A (en) * | 2019-05-29 | 2019-08-30 | 长安大学 | A kind of compound passive energy dissipation denoising device |
| CN110593025A (en) * | 2019-10-22 | 2019-12-20 | 中铁二院工程集团有限责任公司 | Dynamic vibration absorber for corrugation steel rail |
| WO2020238798A1 (en) * | 2019-05-24 | 2020-12-03 | 青岛科而泰环境控制技术有限公司 | Combined steel rail noise reduction and sound absorption device |
| CN112283809A (en) * | 2020-10-30 | 2021-01-29 | 青岛海信日立空调系统有限公司 | Outdoor air conditioner |
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| KR101785969B1 (en) * | 2017-02-13 | 2017-10-19 | 한국철도기술연구원 | Noise insulation devices using sound-absorbing panels |
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| CN2123564U (en) * | 1991-09-13 | 1992-12-02 | 王法源 | High-damped wide frequeney band sound absorption wall |
| CN1077558A (en) * | 1993-05-11 | 1993-10-20 | 王法源 | A kind of sound absorption structure |
| EP0965977A2 (en) * | 1998-06-16 | 1999-12-22 | Continental Aktiengesellschaft | Damping element |
| JP2005266399A (en) * | 2004-03-19 | 2005-09-29 | Ryobi Ltd | Resonator type muffling structure |
| JP2006002442A (en) * | 2004-06-17 | 2006-01-05 | Railway Technical Res Inst | Soundproof structure of rail |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109468895A (en) * | 2018-11-26 | 2019-03-15 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | For the vibration damping acoustic absorptive member of track and with its package system |
| WO2020238798A1 (en) * | 2019-05-24 | 2020-12-03 | 青岛科而泰环境控制技术有限公司 | Combined steel rail noise reduction and sound absorption device |
| CN110184861A (en) * | 2019-05-29 | 2019-08-30 | 长安大学 | A kind of compound passive energy dissipation denoising device |
| CN110593025A (en) * | 2019-10-22 | 2019-12-20 | 中铁二院工程集团有限责任公司 | Dynamic vibration absorber for corrugation steel rail |
| CN110593025B (en) * | 2019-10-22 | 2024-03-26 | 中铁二院工程集团有限责任公司 | Dynamic vibration absorber for wave-grinding steel rail |
| CN112283809A (en) * | 2020-10-30 | 2021-01-29 | 青岛海信日立空调系统有限公司 | Outdoor air conditioner |
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