CN206359909U

CN206359909U - Railway integrated curved form sound barrier

Info

Publication number: CN206359909U
Application number: CN201621465572.8U
Authority: CN
Inventors: 刘振标; 曾敏; 马广; 胡喆; 康小英; 陈正驰; 李光凤
Original assignee: China Railway Siyuan Survey and Design Group Co Ltd
Current assignee: China Railway Siyuan Survey and Design Group Co Ltd
Priority date: 2016-12-29
Filing date: 2016-12-29
Publication date: 2017-07-28
Anticipated expiration: 2026-12-29

Abstract

The utility model discloses a kind of railway integrated curved form sound barrier, including sound barrier base and sound barrier；The section of sound barrier is the smooth curve of closing, smooth curve is arranged symmetrically and is peak with the intersection point of symmetry axis, smooth curve be from peak away from symmetry axis simultaneously downwards it is smooth extend a distance into after be further continued for downwards and smooth close to a segment distance to symmetry axis, two ends and the sound barrier base of smooth curve are fixed.The utility model can effectively reduce the outside windage of sound barrier, be conducive to reducing the blast that structure is born；Can reduce train by when Local Contraction ratio, reduce the Pneumatic pressure of inner high speed train, so that the lateral resistance of train is obviously reduced, be conducive to reducing and vibrated caused by sound barrier sheet material and train aerodynamic-force suffered by skeleton, be conducive to noise reduction, can also strengthen comfort level when train is travelled inside it；Interior noise is reflected back by original route to greatest extent, so as to form effective sound wave interference, so as to reduce noise.

Description

Railway integrated curved form sound barrier

Technical field

The utility model is related to the component used in railway, and in particular to a kind of railway sound barrier.

Background technology

Developed countries are studied in acoustic screen and application aspect has done substantial amounts of work, have developed erect type, Y A variety of patterns such as type, inverted L shape, apsacline and acoustic hood, but there is no the relevant report of the totally-enclosed sound barrier of high-speed railway.

In recent years, with Chinese society expanding economy and the raising of common people's environmental consciousness, vibrate and make an uproar caused by traffic Sound is gradually paid attention to the ambient influnence in region, and various noise barrier structure is obtained in railway, highway and rail traffic bridge Substantial amounts of utilization is arrived, its sound insulation, noise reduction feature are as follows：

(1) railway vertical type sound barrier

Such sound barrier environment sensitive spot that railway passes through at home, generally makes in school, factory, residential neighborhood With, its highly low, simple structure, three-dimensional sound insulation, noise reduction are general.

(2) mining under railways+steel frame, the semi-enclosed sound barrier of sound panel combination

In terms of such sound barrier is used primarily in passenger dedicated railway line, such as Shanghai-Hangzhou visitor specially employs semi-enclosed sound barrier. This section of semi-enclosed long 300m of sound barrier, beam portion uses single box single chamber concrete simple supported box beam, and wind barrier is gate-type steel frame knot Structure, half side closing, train pneumatic stress effect is not as good as full-closed structure.But, the combination sound-screen of steel frame+acoustic board and sound insulationg board There is cost height, poor durability, late maintaining maintenance capacity greatly in barrier structure, the problems such as semi-closed structure defening effect is not notable.And Test result shows that the noise curve contrast of this section of sound barrier inner side and outer side shows that oise insulation factor does not reach 30dB (A), And the oise insulation factor of open side is lower, 30dB (A) requirements are not reached far.

(3) flute profile semi-closed structure+steel frame, the wind shielding structure of sound panel combination

This similar structures such as Lan-xing Railway the second double line wind barrier, the program uses light section steel structure frame, covering Perforate corrugated sheet steel is mainly to solve the windproof requirement of contact net.Wind shielding structure is located at circuit both sides, column and freely-supported flange of beam It is bolted.The class formation is the ventilative structure in part, it is impossible to be used in reduction structureborne noise.

(4) highway, urban track traffic totally enclosed type (containing semi-enclosed) sound barrier

In terms of urban road and Bridges on Urban Rail Transit, number semi-enclosed sound barrier of line of Wuhan Rail Transit, north Capital city railway traffic engineering, Beijing zoo overpass and Hong Kong track traffic employ totally enclosed type sound barrier etc..This The height of class formation is much smaller than railway or high-speed railway, and wind area is small, comparable with railway sound barrier in structure height size Property is small.And the low train pneumatic stress effect of road speed is not very notable, automobile and Repeated-load of High-speed Track Vehicles are lighter than railway, dither effect and Noise is less than railroad bridge；Maintenance is smaller than railway to traffic impact.

In addition, above-mentioned several structures, which can not be played, effectively reduces external wind pressure, train aerodynamic-force effect.

Utility model content

The a series of problems existed when being applied for existing noise barrier structure on railroad bridge, the purpose of this utility model Be provide one kind be able to can play effectively reduce external wind pressure, reduction train aerodynamic-force effect, can improve again sound barrier every The railway integrated curved form sound barrier of sound sound absorbing capabilities.

To reach above-mentioned purpose, the railway integrated curved form sound barrier of the utility model design, it is characterised in that：Including Sound barrier base and sound barrier；The section of the sound barrier for closing smooth curve, the smooth curve be arranged symmetrically and with it is right The intersection point of axle is called peak, the smooth curve be by peak away from symmetry axis simultaneously downwards it is smooth extend a distance into after It is further continued for downwards and to the smooth close segment distance of symmetry axis, two ends and the sound barrier base of the smooth curve are fixed.

It is preferred that, the smooth curve is more than the smooth curve two-end-point to farthest the distance between 2 points of symmetry axis The distance between.

It is preferred that, the smooth curve is more than bridge deck width to farthest the distance between 2 points of symmetry axis.

It is preferred that, the smooth curve is that ellipse clips partial line section.

It is preferred that, the smooth curve is the tangent circular arc of multistage.

It is further preferred that the smooth curve is three sections of tangent circular arcs.

It is preferred that, the sound barrier includes skeleton and sound insulationg board.

The beneficial effects of the invention are as follows：First, the outside wind of sound barrier can be effectively reduced using the contour structures of integrated curved Resistance, is conducive to reducing the blast that structure is born, it is adaptable to typhoon region, reduces primary structure member quantities.2nd, using integrated curved Contour structures can be under bridge deck width identical condition part, sound barrier bottom, which is tried one's best, to be extended out, the knot in the altitude range of train Structure inner width increase so that reduce train by when Local Contraction ratio, reduce inner high speed train Pneumatic pressure so that train Lateral resistance be obviously reduced, be conducive to reducing and vibrated caused by sound barrier sheet material and train aerodynamic-force suffered by skeleton, had Beneficial to noise reduction, it can also strengthen comfort level when train is travelled inside it；3rd, using the contour structures energy maximum limit of integrated curved That spends is reflected back interior noise by original route, so as to form effective sound wave interference, so as to reduce noise.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model

Fig. 2 is the structural representation of prior art one

Fig. 3 is the structural representation of prior art two

Fig. 4 is the flow field figure and tonogram of prior art one

Fig. 5 is the flow field figure and tonogram of prior art two

Fig. 6 is flow field figure of the present utility model and tonogram

In figure：Sound barrier base 1, sound barrier 2, symmetry axis 3, girder 4.

Embodiment

Below by Fig. 1~Fig. 6 and the modes of some alternative embodiments of the present utility model is enumerated, to the utility model Technical scheme (including optimal technical scheme) be described in further detail, any technical characteristic in the present embodiment and appoint What technical scheme does not limit protection domain of the present utility model.

As shown in figure 1, the railway integrated curved form sound barrier of the utility model design, including sound barrier base 1 and sound-screen Barrier 2, the sound barrier base 1 is located at the both sides of the direction across bridge of girder 4；The section of the sound barrier 2 is the smooth curve of closing, described Smooth curve is arranged symmetrically and is peak with the intersection point of symmetry axis 3, and the smooth curve is same away from symmetry axis 3 by peak When downwards it is smooth extend a distance into after be further continued for it is downwards and smooth close to a segment distance to symmetry axis 3, the smooth curve Two ends are fixed with sound barrier base 1.

It is preferred that, the distance between described smooth curve to two farthest point A, B of symmetry axis is more than the smooth curve two The distance between end points C, D, even if also line segment AB ＞ line segments CD.The smooth curve is between two farthest point A, B of symmetry axis Distance be more than bridge deck width, that is to say the structure for foring evagination.

It is preferred that, the sound barrier includes skeleton and sound insulationg board.Skeleton and sound insulation sheet material can be prefabricated in factory, are transported to work Ground in-site installation.Using the tangent circular arc scheme of multistage, the species and manufacture difficulty of skeleton and sound insulationg board can be reduced.

One) external pneumatic performance comparison

Using the SST k- ω models in Fluid Mechanics Computation (CFD) software FLUENT, the different wind speed of permanent analysis, difference Angle of attack lower girder section and three quiet general mood dynamic characteristics with totally enclosed type sound barrier section scheme (Fig. 1 to Fig. 3).

1 is carried out to tri- kinds of structures of Fig. 1 to Fig. 3:1 model is calculated, selected wind speed 15m/s, -3 ° of the wind angle of attack, 0 °, 3 ° enter promoting the circulation of qi Power numerical simulation analysis, as a result as shown in table 1 and Fig. 4 to 6.

From flow field figure and tonogram (Fig. 4 to Fig. 6), substantially rearward, appearance two is right for burble point of the present utility model The wake vortices of title, and position is low compared with two kinds of structures of prior art one and prior art two, therefore resistance coefficient is less than existing skill In the two schemes of art, table 1 damped coefficient of sound barrier all angles of the present utility model be only remaining two scheme 62%~ 89%, due to totally enclosed type sound barrier configuration design, resistance coefficient plays control action, therefore square the utility model external pneumatic power Performance is better than two schemes of the prior art.

Each section pneumatic force coefficient under the different wind speed of table one

Two) aerodynamic performance of train is contrasted：

CFD Three Dimensional Aerodynamic analysis results show, prior art one, two (Fig. 2 and Fig. 3) and the utility model (Fig. 1) Blocking rate is approached, but train in the sound barrier that the utility model is designed when running, the lateral resistance of train, vertical lift side, Turn over torque is respectively prior art 67%, 36%, 70%.

It should be readily apparent to one skilled in the art that preferred embodiment of the present utility model is these are only, not with limitation The utility model, all any modification, combination, replacement, improvement for being made etc. under spirit of the present utility model and principle are included Within protection domain of the present utility model.

Claims

1. a kind of railway integrated curved form sound barrier, it is characterised in that：Including sound barrier base (1) and sound barrier (2)；The sound The section of barrier (2) is the smooth curve of closing, and the smooth curve is arranged symmetrically and is highest with the intersection point of symmetry axis (3) Point, the smooth curve be by peak away from symmetry axis (3) and meanwhile downwards it is smooth extend a distance into after be further continued for downwards simultaneously Smooth close to a segment distance to symmetry axis (3), the two ends of the smooth curve and sound barrier base (1) are fixed.

2. railway integrated curved form sound barrier according to claim 1, it is characterised in that：The smooth curve is to symmetrically Farthest the distance between 2 points of axle (3) are more than the distance between described smooth curve two-end-point.

3. railway integrated curved form sound barrier according to claim 1, it is characterised in that：The smooth curve is to symmetrically Farthest the distance between 2 points of axle are more than bridge deck width.

4. the railway integrated curved form sound barrier according to claim 1 or 2 or 3, it is characterised in that：The smooth curve Partial line section is clipped for ellipse.

5. the railway integrated curved form sound barrier according to claim 1 or 2 or 3, it is characterised in that：The smooth curve For the tangent circular arc of multistage.

6. railway integrated curved form sound barrier according to claim 5, it is characterised in that：The smooth curve is three sections Tangent circular arc.

7. railway integrated curved form sound barrier according to claim 1, it is characterised in that：The sound barrier (2) includes Skeleton and sound insulationg board.