CN101016729A - Sound absorbing and insulating barrier - Google Patents
Sound absorbing and insulating barrier Download PDFInfo
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- CN101016729A CN101016729A CNA2006101709928A CN200610170992A CN101016729A CN 101016729 A CN101016729 A CN 101016729A CN A2006101709928 A CNA2006101709928 A CN A2006101709928A CN 200610170992 A CN200610170992 A CN 200610170992A CN 101016729 A CN101016729 A CN 101016729A
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- support frame
- screen board
- sound absorption
- absorption screen
- insulating barrier
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0023—Details, e.g. foundations
Abstract
The invention relates to a shield besides road to adsorb noise, which comprises a sound adsorption shield and a support frame, wherein the shield plate and the support frame or/and support frame and the base are connected via flexible element or/and damping element, the flexible element and the damping element can be serially, parallel or integrally connected. The invention can improve sound adsorption ability and protect the base, with long service life, less increase on the load of road, and high safety or the like.
Description
Technical field
The present invention relates to noise control and vibration isolation field, belong to a kind of sound absorption, sound insulation, vibration absorber, be specially a kind of barrier that is used to inhale in highway and railway both sides every noise.
Background technology
Various vehicles can produce strong noise in the running on highway or railway; in order to alleviate the influence of noise, in the highway that passes bridge, residential community or industrial occupancy or railway bypass regular meeting sound absorbing-insulating barrier is set and realizes sound insulation and noise reduction production facility, building and people's life.Quickening along with people's rhythm of life, the speed of a motor vehicle of motor vehicle is more and more higher, many passenger rail vehicles have raised speed 200-250 kilometer/hour, in the future even will raise speed 300-350 kilometer/hour, but, the sound absorbing-insulating barrier that uses is for the requirement of functional and economy and the restriction of mounting structure at present, the lighter weight of the common material that uses, breadth is bigger, rigidity is relatively poor, antivibration is indifferent, when vehicle low speed can satisfy instructions for use by fashion, but when vehicle at a high speed by the time because the variation of air pressure can form the alternation exciting force that pulling force and suction replace, formed discrepancy blast when particularly headstock enters and leaves with the tailstock makes sound absorbing-insulating barrier produce strong vibration.On the one hand, rigidity that the sound absorption screen board is relatively poor and less damping meeting are because resonance amplitude is exaggerated, and each component stress cycle-index is many, and the time one is of a specified duration, causes the fatigue damage of sound absorption screen board easily; On the other hand, this strong vibration meeting forms bigger destruction to the rear frame legs connecting portion of sound absorbing-insulating barrier and even coupled bridge, road basis or pier, as cause the supporting leg connecting portion to rupture, connecting bolt is loosening, phase company headquarters concrete crackle occurs even peels off etc., have a strong impact on the application life of sound absorbing-insulating barrier, not only cause huge economic waste, even also threaten the safety of traffic safety and road infrastructure.The sound absorbing-insulating barrier that is provided with in the big both sides, highway section of wind-force of windy area is because the influence of wind-force also exists same problem.This type of problem has become a difficult problem that needs to be resolved hurrily in Control Noise Pollution field in the global range.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective; a kind of sound absorbing-insulating barrier that can effectively cushion the external exciting force of decay is provided; it has long service life, and the fast characteristics of external exciting that decay can effectively be protected sound absorbing-insulating barrier itself and coupled bridge, road basis or pier.
The present invention is achieved in that and comprises sound absorption screen board and support frame, between sound absorption screen board and the support frame or/and adopt flexible member or/and damping element is connected between support frame and the pedestal.Wherein, flexible member can adopt with damping element and connect, or in parallel, or becomes one.Described flexible member comprises spring, rubber, elastic polyurethane or rope etc., and damping element is damper or visco-elastic damping material etc.
When flexible member and damping element are arranged between support frame and the pedestal, support frame has at least a place to pass through flexible member or/and damping element links to each other with pedestal, support frame can be along the elasticity translation of sound absorption screen board normal direction or around sound absorption screen board longitudinal elasticity swing, and translation intrinsic frequency or swing intrinsic frequency are lower than 1.4 times of excited frequency.The support frame lower end is provided with the allotment leg of bending resistance, L shaped supporting leg, inverted T-shaped supporting leg or triangle supporting leg, or the flange of flange, band reinforcing rib.Support frame can also be provided with along the horizontally-guided device of sound absorption screen board normal direction, described horizontally-guided device is provided with linear roller bearing or linear slide bearing or pilot hole or road along the line vertical stiffness much larger than the rubber spring along sound absorption screen board normal stiffness, and flexible member and/or damping element are at least along the normal direction effect of sound absorption screen board.Also the supporting leg lower end of support frame can be inserted in the seat tube that is arranged at pedestal, between support frame supporting leg and seat tube, flexible member and/or damping element are set.Can also support frame lower end and pedestal is hinged, support frame leaves that any click-through of pin joint is crossed flexible member and/or damping element is connected with pedestal.
When flexible member and damping element are arranged between sound absorption screen board and the support frame, the sound absorption screen board is passed through flexible member or/and damping element links to each other with support frame, make the sound absorption screen board can be, and translation intrinsic frequency or swing intrinsic frequency be lower than 1.4 times of excited frequency along its normal direction resilient movement or coiling road longitudinal oscillation.Also rope and/or damper can be set on support frame, wherein rope ends links to each other with support frame and tensioning, and the sound absorption screen board is suspended on the rope, and an end of damper is connected on the framework, and the other end links to each other with the sound absorption screen board.
Traditional sound absorbing-insulating barrier adopts rigid connection with the basis, employing is with the firm method of firm gram, the resonance of exciting force is amplified inevitable, guarantee that sound absorption screen board itself and pedestal junction do not destroy, cost is very high, deadweight increases a lot, increases the bridge load, still is difficult to guarantee the sound absorption screen board and does not destroy with the pedestal junction.
The sound absorption screen board is or/and support frame adopts mode of the present invention to utilize flexible member or/and after the damping element connection, sound absorption screen board or support frame are pressed under the suction and can be swung along the elasticity translation of sound absorption screen board normal direction or around sound absorption screen board longitudinal elasticity in the blast pulse, owing to adopted the flexible member connection, make that translation intrinsic frequency or swing intrinsic frequency can be far below the effect frequencies (inverse of positive and negative blast pulse operating time) of blast, according to the kinetics vibration isolation principle, at this moment the inertia mass institute balance of the most of supported framework itself of exciting force, the exciting force that passes on the pedestal is significantly decayed; If adopted damping element simultaneously, the vibration attenuation of support frame and sound absorption screen board is very fast, and the fatigue stress cycle-index of sound absorption screen board, support frame and pedestal connecting portion will significantly reduce.
If noise barrier does not adopt flexible member; connect but only on the basis of fixed connection, increase damping element; the intrinsic frequency of noise barrier generally can be in resonance range; at this moment the amplitude that the damping of damping element can suppress to resonate; accelerate the decay of vibration; thereby the connecting portion of protection sound absorbing-insulating barrier and pedestal also has effect preferably.
Because support frame adopts above-mentioned supporting leg and flange, strengthened the acting force arm of dynamical bending moment in addition, reduced sound absorbing-insulating barrier the moment of flexure and the shearing of pedestal connecting portion are concentrated effect, the pedestal indefatigability is damaged.
Sound absorption screen board between the support frame column itself also can be by being provided with the bending rigidity that pretension rope or bending resistance section bar or truss improve the sound absorption screen board, or increase the damping of sound absorption screen board by the method for setting up damping-constraining or tuned mass damper.These measures can reduce the resonance amplitude of sound absorption screen board itself, accelerate vibration attenuation, reduce the fatigue stress and the cycle-index of sound absorption screen board, improve its life-span and the safety of sound absorption screen board itself.
The present invention by between sound absorption screen board and the support frame or/and flexible member is set or/and damping element between support frame and the pedestal; under the situation that does not change existing sound absorbing-insulating barrier material and performance; improved the ability that the anti-extraneous exciting force of sound absorbing-insulating barrier destroys greatly; and the pedestal that links to each other with sound absorbing-insulating barrier realized effective protection; therefore it has long service life; the Wind-Pressure Resistance ability is strong; bridge, road basis or pier static load are increased few; advantages such as the dynamic load effect is little, safety, economy and the feature of environmental protection are all good.
Description of drawings
Fig. 1 is one of structural representation of the present invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is two of a structural representation of the present invention.
Fig. 4 is three of a structural representation of the present invention.
Fig. 5 is four of a structural representation of the present invention.
Fig. 6 is five of a structural representation of the present invention.
Fig. 7 is six of a structural representation of the present invention.
Fig. 8 is seven of a structural representation of the present invention.
Fig. 9 is the A-A sectional view of Fig. 8.
Figure 10 is eight of a structural representation of the present invention.
Figure 11 is nine of a structural representation of the present invention.
Figure 12 is ten of a structural representation of the present invention.
The specific embodiment
Embodiment one
Sound absorbing-insulating barrier of the present invention as shown in Figure 1 and Figure 2, comprise support frame 1 and sound absorption screen board 2, sound absorption screen board 2 is arranged in the support frame 1, be provided with flexible member and damping element in parallel between support frame 1 and the pedestal 5, wherein, flexible member is a spring 3, and damping element is a damper 4.The stone bolt 16 (not specifically illustrating among the figure) that utilization is preset in the pedestal 5 links together support frame 1 and pedestal 5 in advance tightly.For strengthening the bending rigidity of support frame bottom, the bottom of support frame is provided with oblique reinforcing rib 17, makes the support frame bottom form the triangle supporting leg.
When the extraneous exciting force of vehicle process or wind formation acts on sound absorbing-insulating barrier, because the existence of spring 3 and damper 4 between sound absorbing-insulating barrier and the pedestal, sound absorbing-insulating barrier can be swung along the normal direction translation of sound absorption screen board and around sound absorption screen board longitudinal elasticity, if make translation intrinsic frequency and swing intrinsic frequency (accurately be 1.414 times less than 1.4 times of excited frequency, reality is generally got 2-3 doubly), according to the kinetics vibration isolation principle, at this moment not only avoided resonance, the inertia mass institute balance of the most of on the contrary supported framework of exciting force itself, the exciting force that passes on the pedestal is significantly decayed, owing to adopted damping element 4 simultaneously, the vibration attenuation of support frame and sound absorption screen board is very fast, the sound absorption screen board, the fatigue stress cycle-index of support frame and pedestal connecting portion will significantly reduce.
Simultaneously; what the triangle supporting leg had strengthened support frame and pedestal is connected area and moment of flexure acting force arm; greatly reduce in the sound absorbing-insulating barrier vibration processes moment of flexure that forms at the supporting leg place and shearing concentrated load to the influence of pedestal 5 connecting portions, effectively protected sound absorbing-insulating barrier and pedestal.
In addition, the wire rope 12 of tensioning can be crisscross arranged on the surface of sound absorption screen board 2, improving the bending rigidity and the damping of sound absorption screen board 2 self, thereby the distortion and the fatigue failure of sound absorption screen board itself when reducing vibration further prolongs application life of sound absorption screen board.Certainly by being set, technological means such as bending resistance section bar or truss also can realize same effect between the sound absorption screen board.For overcoming the defective of less, the easy generation vibration of sound absorption screen board self damping, can when making the sound absorption screen board, select the higher material of damped coefficient as far as possible for use or pass through additional constraint damping material (not shown) outside the sound absorption screen board, or the method for tuned mass damper (not shown) increases self damping of sound absorption screen board, to suppress the resonance of sound absorption screen board itself.
When utilizing stone bolt 16 that support frame 1 and pedestal 5 are linked together in advance tightly, can be by the initial service load of control to the pretightning force control spring of spring 3, outside exciting force is during less than initial service load, spring is rigidity, can avoid the small size vibration of sound absorption screen board, after outside exciting force surpasses initial service load, spring begins to enter elastic stage, have the buffer shock-absorbing effect, but pretightning force does not surpass the spring rated load, otherwise spring 3 will lose the buffer shock-absorbing effect.Described spring not only refers to helical spring, also can be the spring of dish spring, leaf spring, rubber mat or other kind.If the intensity of support frame supporting leg horizontal segment part itself is enough, also reinforcing rib 17 can be set, this moment, support frame saw it promptly is said " L " type from the side.
For preventing dust, rainwater or dirt erosion damage spring 3 and damper 4, cause the antivibration ability drop of sound absorbing-insulating, can grant asylum at spring 3 and damper 4 outer setting protective covers.
Present embodiment only shows one and strides sound absorbing-insulating barrier; in fact the present invention is equally applicable to the continuous sound absorbing-insulating barrier of multispan; except the sound absorbing-insulating barrier that is applicable to; also be applicable to simple noise barrier or simple absorbent lined barrier; only need the sound absorption screen board is replaced with sound absorption screen board or sound insulation screen board accordingly, can realize same protective effect.
Embodiment two
Sound absorbing-insulating barrier of the present invention as shown in Figure 3, be with the difference of embodiment one, be provided with guiding device guide type shoe 18 between the supporting leg of sound absorbing-insulating barrier support frame 1 and the pedestal 5, guide type shoe 18 is provided with along the horizontally-guided hole of sound absorption screen board normal direction, make the support frame supporting leg relatively guide type shoe 18 move horizontally, corresponding spring 3 and damper 4 also change horizontal direction into and are arranged between supporting leg and the guide type shoe 18, and guide type shoe 18 connects with pedestal 5 usefulness bolt.
After sound absorption screen board 2 bears extraneous exciting force, drive support frame 1 along the translation of sound absorption screen board normal direction elasticity, its inertia mass has balanced most of exciting force, compress simultaneously or extension spring 3 and damper 4, according to aforementioned vibration isolation and damping principle, spring 3 and damper 4 can cushion and absorb vibrational energy, make vibration decay rapidly.Because the supporting leg of sound absorbing-insulating barrier has strengthened the moment of flexure acting force arm, therefore in the extraneous exciting force of buffering, also greatly reduce the moment of flexure and the concentrated load that form at the supporting leg place in the sound absorbing-insulating barrier generation vibration processes, littler to the influence of pedestal 5.
Present embodiment adopts the horizontally-guided device to limit the swing of making noise barrier, and the acceleration on the top of sound absorption screen board own is less, helps improving the life-span of protection sound absorption screen board itself.Linear roller bearing or linear slide bearing also can be set certainly as the horizontally-guided device on guide type shoe, can play good effect.
Embodiment three
Sound absorbing-insulating barrier of the present invention as shown in Figure 4, and the difference of embodiment one is between support frame 1 and the pedestal 5 laminated rubber bases 6 to be set, be the shock isolating pedestal described in the Chinese patent of ZL3112549.2 as the patent No. of on September 7th, 2005 bulletin, it can be considered the integrated of flexible member and damping element.
This laminated rubber bases 6 is very big in the rigidity of vertical direction, but elasticity is fine in the horizontal direction, therefore plays the horizontal direction guide effect.Owing to can realize bigger horizontal shear distortion, limited the swing of sound absorbing-insulating barrier, therefore have guide function, spring function and damping function simultaneously, so when sound absorbing-insulating barrier is subjected to extraneous exciting force, laminated rubber bases 6 can take place along the bigger horizontal resilient movement of sound absorption screen board normal direction, realize the efficient buffer vibration isolation, thereby assurance sound absorption screen board 2, support frame 1 supporting leg and pedestal 5 are avoided destroying.
Present embodiment has the advantage of embodiment two simultaneously, but structure is simpler, compact, economical and practical.
Embodiment four
Sound absorbing-insulating barrier of the present invention as shown in Figure 5, and the difference of embodiment one is to change between support frame 1 and the pedestal 5 hinged, auxiliary oblique support is set in the support frame bottom simultaneously, be specially a pull bar 7, an end and the support frame 1 of pull bar 7 are hinged, and the other end of pull bar 7 places in the vibration isolator 14, vibration isolator 14 is hinged with pedestal 5, be provided with dish spring 8 in the vibration isolator 14, and make the swing intrinsic frequency of sound absorbing-insulating barrier be lower than 1.4 times of excited frequency, doubly as 2-3.Because dish spring 8 has elasticity and damping characteristic concurrently, therefore be equivalent to the integrated of flexible member and damping element.
When vibration took place, sound absorption screen board 2 bore outside exciting force and drives support frame 1 generation swing vibration, and support frame 1 drives the dish springs 8 of pull bar 7 tension and compression vibration isolators 14 inner settings.Because dish spring 8 was not only flexible but also damping characteristic arranged, therefore can absorb vibrational energy by aforementioned vibration isolation and damping principle efficient buffer, make vibration decay rapidly, prevented that effectively sound absorption screen board 2 from because of the fatigue failure that high vibration forms, having prolonged the application life of sound absorption screen board 2 greatly.Again because being connected between support frame 1 and the pedestal 5 is hinged, so support frame 1 and pedestal 5 do not bear torque substantially, and load concentration is light, so the infringement that is subjected to is also very light.
Present embodiment is because sound absorbing-insulating barrier can only elastics wing, and the exciting force of sound absorbing-insulating barrier bottom is not isolated decay fully, though there are not embodiment one or embodiment two effective, simple structure, reliable operation, economical and practical.
Embodiment five
Sound absorbing-insulating barrier of the present invention as shown in Figure 6, and the difference of embodiment one and embodiment four is between support frame 1 and the pedestal 5 spring 3 to be set, and is arranged in parallel spring 3 and damper 4 on the pull bar 7 simultaneously.The supporting leg of support frame 1 is arranged to down T-shape.
When sound absorbing-insulating barrier is subjected to exciting force; sound absorbing-insulating barrier both can the elasticity translation; also can elastics wing; utilizing the spring buffer that is provided with between support frame 1 and the pedestal 5 to absorb main level moves and shearing; utilize the spring 3 and damper 4 bufferings that are provided with on the pull bar 7 to absorb main swing and swing moment of flexure; compare with embodiment one; because the vibration damping energy dissipating effect of pull bar; noise barrier top amplitude of fluctuation is less; the top of sound absorption screen board acceleration own is less; concentrated shearing and moment of flexure to pedestal are littler, can better realize the protection to sound absorbing-insulating barrier itself and pedestal.
Embodiment six
Sound absorbing-insulating barrier of the present invention as shown in Figure 7, be with the difference of embodiment five, when being subjected to the installing space restriction can't oblique supplemental support be set, connection area between flange expansion framework and the pedestal can be set in support frame 1 lower end, flange and and pedestal 5 between elastic polyurethane backing plate 9 is set, for strengthening the elasticity of elastic polyurethane backing plate 9, portion foams or some apertures is set within it.The securing member 10 that utilization is preset on the pedestal 5 links together sound absorbing-insulating barrier and pedestal, and preloading spring 3 is set above the support frame flange simultaneously, and suitable pretension.
When vibration takes place; sound absorption screen board 2 bears outside exciting force drive support frame 1 and vibrates; because elastic polyurethane backing plate 9 has better elastic and damping characteristic; and the existence of preloading spring 3; the sound absorption screen board can vertically be made elastics wing with the support frame road that winds the line together; and can translation (enough gaps should be left in the flange bolt hole) be arranged slightly along sound absorption screen board normal direction; can cushion the absorption exciting force well according to the vibration isolation and damping principle; the damped vibration cycle-index well protects sound absorbing-insulating barrier and pedestal to avoid destroying.
The present embodiment effectiveness in vibration suppression generally is lower than aforesaid several embodiment, but needs the space little, and compact conformation is economical and practical.
Embodiment seven
As Fig. 8, shown in Figure 9, for alleviating in the sound absorbing-insulating barrier generation vibration processes moment of flexure and concentrated load to the influence of pedestal 5, adopt direct insertion the connection between the support frame 1 of sound absorbing-insulating barrier and the pedestal 5, limit base 11 is set in pedestal 5, the rubber pad 9 as flexible member and damping element is set between the straight cutting supporting leg of limit base 11 and support frame 1.
When sound absorption screen board 2 is subjected to extraneous exciting force that vibration takes place, owing to can realize bigger horizontal movement after rubber pad is compressed, thereby sound absorption screen board and framework can be made elasticity translation and elastics wing, according to aforementioned vibration isolation and damping principle, the rubber pad 9 that support frame 1 links to each other can buffering absorb vibrational energy, damped vibration rapidly; The part that while is imbedded pedestal 5 owing to support frame 1 is longer, therefore can bear bigger torque, has reduced load concentration.
This example only when support frame just enters pedestal and do not hold two positions to be provided with limit base and rubber pad, when using, also can suitably increase the number that limit base and rubber pad are set according to actual needs, in addition below seat surface whole the setting.
Embodiment eight
As shown in figure 10, be with the difference of embodiment seven, for avoiding support frame 1 supporting leg to push repeatedly in the process of rubber pad 9, rubber pad 9 produces destruction and loosening, also can place the supporting leg in the pedestal to be made as pipe support frame 1, can be chosen to product tubing accordingly and make outer sleeve 11, middle adopt an integral body or totally two ring-shaped rubber cushion blockings up and down, outer sleeve can be poured in the pedestal, also can realize same effectiveness in vibration suppression, more compact structure, more durable is installed simpler, and both artistic and practical.
Embodiment nine
Flexible member in the sound absorbing-insulating barrier of the present invention and damping element can also be arranged between sound absorption screen board and the support frame except that being arranged between support frame and the pedestal.As shown in figure 11, sound absorption screen board 2 embeds and is arranged in the H shaped steel column of support frame 1, and spring 3 and damper 4 are set between support frame 1 and sound absorption screen board 2.
When sound absorption screen board 2 is subjected to external exciting force effect vibration takes place, the sound absorption screen board can be along its normal direction elasticity translation, if make its translation intrinsic frequency be lower than 1.4 times of excited frequency, as 2-3 doubly, at this moment spring 3 and damper 4 can buffering absorb vibrational energy, sound absorption screen board 2 is tended towards stability rapidly, avoid impaired.Therefore simultaneously, the vibration that is passed to support frame 1 by sound absorption screen board 2 is less, to the also corresponding reduction of dynamic effect of the supporting leg and the pedestal connecting portion of support frame.
Embodiment ten
Said flexible member also comprises rope in the sound absorbing-insulating barrier of the present invention, as wire rope, as shown in figure 12, utilize snap close 15 that sound absorption screen board 2 and wire rope 12 interludes are fixed together, wire rope one end is fixed on support frame 1 bottom, and the other end is regulated bolt 13 by rate of tension and is fixed on support frame 1 top.Like this, utilize wire rope 12 that sound absorption screen board 2 is suspended in the support frame 1, and between sound absorption screen board 2 and support frame 1, also be provided with damper 4.
During use, regulate bolt 13 tensioning wire rope 12, make its translation intrinsic frequency be lower than 1.4 times of excited frequency, doubly as 2-3 by adjusting rate of tension.When being subjected to external exciting force, sound absorption screen board 2 does the time spent, because sound absorption screen board 2 is in a kind of free state of suspention, therefore it can be subjected to displacement to stressed direction, exciting force is by the most of balance of its inertia mass, the influence that is subjected to of sound absorption screen board 2 is less like this, its vibration that passes to support frame 1 is also lighter, again owing between sound absorption screen board 2 and support frame 1, also be provided with damper 4, vibrate damped rapid decay, the vibration cycles number of times is less, and therefore vibration and the fatigue to support frame and pedestal influences also corresponding reduction.
Certainly in the horizontal direction wire rope 12 and sound absorption screen board 2 are linked together and tensioning, utilize wire rope 12 that sound absorption screen board 2 is suspended in the support frame 1, or on four frames of support frame 1, wire rope 12 is set respectively sound absorption screen board 2 is suspended in the support frame 1, auxiliary again with damper 4 common bufferings and absorption vibrational energy, also can realize good effect.The advantage of present embodiment is by regulating the tension force of wire rope, can adjust the intrinsic frequency of sound absorption screen board simply.
The embodiment of the invention described above may be used alone, can also be used in combination, and can both realize good effect.
Sound absorbing-insulating barrier of the present invention, the principle that employing is defeated a force with a tenderness, utilize flexible member and damping element to change the rigid support of sound absorption screen board or support frame into resiliency supported, cushioned sound absorbing-insulating barrier to support frame and support frame vibration action intensity to pedestal, reduced vibration effect cycle-index, make the sound absorbing-insulating barrier reliable operation, long service life, the Wind-Pressure Resistance ability is strong, to bridge, road basis or pier dead weight increase few, the dynamic load fatigue effect is little, is expected effectively to solve the world-famous puzzle that the high-speed railway sound absorbing-insulating barrier damages easily, has high application value.
Claims (10)
1, a kind of sound absorbing-insulating barrier comprises sound absorption screen board and support frame, it is characterized in that between sound absorption screen board and the support frame or/and adopt flexible member or/and damping element is connected between support frame and the pedestal.
2, sound absorbing-insulating barrier according to claim 1, it is characterized in that flexible member and damping element serial or parallel connection or become one, flexible member is spring or rubber or elastic polyurethane or rope, and damping element is damper or visco-elastic damping material.
3, sound absorbing-insulating barrier according to claim 2, its feature has at least a place to pass through flexible member or/and damping element links to each other with pedestal at support frame, support frame can be along the elasticity translation of sound absorption screen board normal direction or around sound absorption screen board longitudinal elasticity swing, and translation intrinsic frequency or swing intrinsic frequency are lower than 1.4 times of excited frequency.
4, sound absorbing-insulating barrier according to claim 3 is characterized in that the support frame lower end is provided with allotment leg or L shaped, the inverted T-shaped or the triangle supporting leg of bending resistance, or the flange of flange or band reinforcing rib.
5, sound absorbing-insulating barrier according to claim 4, it is characterized in that support frame is provided with along the horizontally-guided device of sound absorption screen board normal direction, the horizontally-guided device is provided with linear roller bearing or linear slide bearing or pilot hole or the road vertical stiffness is much larger than the rubber spring along sound absorption screen board normal stiffness along the line, and flexible member and/or damping element are at least along the effect of sound absorption screen board normal direction.
6, sound absorbing-insulating barrier according to claim 4 is characterized in that the supporting leg lower end of support frame is inserted in the seat tube that is arranged at pedestal, is provided with flexible member and/or damping element between support frame supporting leg and seat tube.
7, sound absorbing-insulating barrier according to claim 3 is characterized in that support frame lower end and pedestal are hinged, and support frame leaves that any click-through of pin joint is crossed flexible member and/or damping element is connected with pedestal.
8, sound absorbing-insulating barrier according to claim 2, it is characterized in that the sound absorption screen board passes through flexible member or/and damping element links to each other with support frame, the sound absorption screen board can be along its normal direction resilient movement or coiling road longitudinal oscillation, and translation intrinsic frequency or swing intrinsic frequency are lower than 1.4 times of excited frequency.
9, sound absorbing-insulating barrier according to claim 8, it is characterized in that being provided with on the support frame rope and/or damper, wherein rope ends links to each other with support frame and tensioning, and the sound absorption screen board is suspended on the rope, one end of damper is connected on the framework, and the other end links to each other with the sound absorption screen board.
10, sound absorbing-insulating barrier according to claim 1, it is characterized in that sound absorption screen board between the support frame column by the bending rigidity that pretension rope or bending resistance section bar or truss improve the sound absorption screen board is set, or increase the damping of sound absorption screen board by damping-constraining or tuned mass damper are set.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610170992A CN100575610C (en) | 2006-12-26 | 2006-12-26 | Sound absorbing-insulating barrier |
| PCT/CN2007/003820 WO2008077318A1 (en) | 2006-12-26 | 2007-12-26 | Sound insulation screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610170992A CN100575610C (en) | 2006-12-26 | 2006-12-26 | Sound absorbing-insulating barrier |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103091124A Division CN101781880B (en) | 2006-12-26 | 2006-12-26 | Sound absorbing-insulating barrier |
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| Publication Number | Publication Date |
|---|---|
| CN101016729A true CN101016729A (en) | 2007-08-15 |
| CN100575610C CN100575610C (en) | 2009-12-30 |
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| CN200610170992A Active CN100575610C (en) | 2006-12-26 | 2006-12-26 | Sound absorbing-insulating barrier |
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| WO (1) | WO2008077318A1 (en) |
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| WO2008077318A1 (en) | 2008-07-03 |
| CN100575610C (en) | 2009-12-30 |
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