CN108411713B - Quasi-zero stiffness vibration isolators floating plate railway roadbed and its design method - Google Patents
Quasi-zero stiffness vibration isolators floating plate railway roadbed and its design method Download PDFInfo
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- CN108411713B CN108411713B CN201810244688.6A CN201810244688A CN108411713B CN 108411713 B CN108411713 B CN 108411713B CN 201810244688 A CN201810244688 A CN 201810244688A CN 108411713 B CN108411713 B CN 108411713B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
- E01B1/005—Ballastless track, e.g. concrete slab trackway, or with asphalt layers with sleeper shoes
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- 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
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Abstract
Quasi-zero stiffness vibration isolators floating plate railway roadbed, it is characterized by comprising floating plates, the vibration isolation component being arranged in floating plate, vibration isolation component is spaced apart along floating plate length direction, it is characterized in that the vibration isolation component includes the outer sleeve being cast in floating plate and the quasi-zero stiffness vibration isolators in outer sleeve, it is lined with the height-regulating gasket for adjusting floating plate height between the quasi-zero stiffness vibration isolators and outer sleeve, is stamped insulation cover plate at the top of outer sleeve.Quasi-zero stiffness vibration isolators are arranged in floating plate railway roadbed in the present invention, floating plate track bearing capacity and stability are not influenced, and floating plate railway roadbed is made to have the advantages that high-mechanic, small deformation ability, low frequency vibration isolation effect are good and isolation frequency range is big, the low-frequency vibration ingredient for effectively inhibiting floating plate railway roadbed, realizes the low frequency vibration isolation of floating plate track.The present invention also provides a kind of design methods of quasi-zero stiffness vibration isolators floating plate railway roadbed.
Description
Technical field
The present invention relates to a kind of quasi-zero stiffness vibration isolators floating plate railway roadbed and its design methods, realize the low of floating plate track
Frequency vibration isolation belongs to track vibration damping denoising field.
Background technique
In recent years, Urban Rail Transit Development bring vibration noise problem more and more attracts attention.
Vibration caused by wheel-rail interaction is transferred to the surrounding infrastructures such as tunnel or bridge through track structure, and then is passed by ground
Adjacent Buildings are delivered to, adverse effect can all be generated to subjective reflection, school, hospital, office building etc..Currently, in numerous tracks
In vibration reducing measure, floating plate rail structure is considered as the best track vibration-reducing form of effectiveness in vibration suppression.But it is studies have shown that floating
The vibration component of upper frequency can effectively be inhibited by setting plate track, and simultaneously to the low-frequency vibration ingredient inhibitory effect less than 20Hz
It is unobvious, especially in the buildings such as hospital, school, laboratory, museum precision instrument and rare cultural relics it is very quick
The vibration component of the 10Hz of sense or so is even more difficult to reach ideal attenuating.
Floating plate track is substantially a mass-spring-damper vibrating isolation system.Floating plate mainly uses steel spring at present
Vibration isolator and common rubber shock absorber, the stiffness characteristics of both vibration isolators are all linear rigidities or close to linear rigidity.
By linear oscillator theory it is found that for general linear spring mass-damping isolator, either still exist in HARMONIC FORCE
Under vibration of foundation incentive action, only when external excitation frequency is greater thanTimes system frequency when, vibration isolating effect could be generated.
Therefore, it is influenced to efficiently reduce train to the vibration of building along the line, traditional method is by the intrinsic frequency of track structure
Rate continues to reduce, i.e. increase track quality or reduction vibration isolator rigidity.But the quality for increasing track structure will receive tunnel
The limitation of space and construction cost；Reducing rigidity can make the intrinsic frequency of track structure become lower, but will increase steel simultaneously
Rail displacement, the strong influence safety of train operation.Therefore, it has been reduced by reducing the intrinsic frequency of floating plate track
The method limitation for imitating the frequency range of vibration isolation is very big.
Above-mentioned is contradiction existing for linear vibration isolator.In order to solve this contradiction, nonlinear theory of vibration isolation is applied and is given birth to,
I.e. quasi- zero stiffness theory of vibration isolation, it is formed using the in parallel of positive negative stiffness.When a negative stiffness element and a positive rigidity member
When part parallel connection, negative stiffness state will be by positive rigidity state constraint, will when by negative stiffness and positive rigidity Design at matching
Zero stiffness is formed in some equilbrium position, is formed about small stiffness characteristics in equilbrium position, i.e., so-called quasi- zero stiffness.It is this
The gravity of quasi- zero stiffness structure system at equipoise is carried by positive rigidity elastic element, is vibrated near this equilbrium position
When system rigidity very little, it is low here it is solving so vibration isolation range can be expanded to low frequency so its intrinsic frequency can be very low
The thinking of frequency vibration isolation.In recent years, a series of vibration isolators with quasi- zero stiffness feature are suggested and have been applied in engineering field,
Ground resonance test, space microgravity experimental study, laser interferometer, seismic wave survey meter, gravitational wave including aircraft are visited
Survey the vibration isolation and Packaging Engineering, vehicle seat, bogie suspension, the protection of motive, mechanical precision of the precision instruments such as device
Processing etc..But this technology is applied to not yet in the damping technology of rail traffic.
The related art retrieved:
1, CN201610340470 .1, a kind of floating plate vibration absorber, including multiple floating plates, rubber damping band and more
A vibration isolation unit, the floating plate make floating plate and floor or ground by the vibration isolation unit support being placed on floor or ground
Between form gap, the rubber damping band is arranged between adjacent floating plate, the isolation mounting can effectively by machine vibration with
Floor isolation, and vibrating isolation system work progress jacking is convenient, can realize maintenance and replacement in use process.
2, CN201620709585.9 is related to a kind of spiral jacking spring cushion for track floating plate, packet
Include: outer sleeve, inner sidewall, which is equipped with, is turned up jacking cylinder, and being turned up in the middle part of jacking cylinder has threaded hole；Spiral top plate is threadedly coupled
The threaded hole in the middle part of jacking cylinder is turned up；Inner sleeve, with top and bottom end, tip side is set in outer sleeve, and top is supported
Spiral top plate is pushed up, bottom end side stretches out outer sleeve, so that resilient support formation pair of the inner sleeve by its top to spiral top plate
The resilient support of outer sleeve, when adjust spiral top plate be turned up jacking cylinder threaded hole in be spirally connected depth when, be able in adjustment
Resilient support height of the sleeve to outer sleeve.
3,201710265068.6 CN, disclose a kind of dish type non-linear low frequency based on positive and negative Stiffness principle every
Shake device, is made of power input portion, tension spring system, pressure spring system and shell, and tension spring system realizes that positive rigidity, pressure spring system are real
Existing negative stiffness, the two, which combines, makes static system force-displacement curve that quasi- zero stiffness characteristic be presented.
4,201310330360.3 CN, provide a kind of dish-shaped rubber quasi-zero stiffness vibration isolators, including pedestal, upper cover and
Connector is carried, the upper cover inner wall is connected with butterfly rubber, and the dish rubber is fixed with the carrying connector and the upper cover
The composition that links together has the elastic element of negative stiffness, is equipped with reinforcing rib in the butterfly rubber, the carrying connector passes through
Gland is connect with the axial rubber with positive rigidity, and the axial rubber connects on the base by adjusting set.
To sum up, in the prior art, quasi-zero stiffness vibration isolators are used in some vibration damping fields, but in floating plate
In track, there are no example is specifically used, according to the load-carrying properties of floating plate track, damping requirements and architectural characteristic, use
The vibration attenuation mechanism of quasi-zero stiffness vibration isolators, the low frequency vibration isolation of Lai Shixian floating plate track realize the low-frequency vibration in train driving
Ingredient inhibits to be the direction of the invention studied.
Summary of the invention
Quasi-zero stiffness vibration isolators floating plate railway roadbed provided by the invention and its design method are arranged quasi- in floating plate railway roadbed
Zero-rigidity vibration isolator does not influence floating plate track bearing capacity and stability, and floating plate railway roadbed is made to have high-mechanic, small
Deformability, the advantage that low frequency vibration isolation effect is good and isolation frequency range is big, effectively inhibit floating plate railway roadbed low-frequency vibration at
Point, realize the low frequency vibration isolation of floating plate track.The present invention also provides a kind of design sides of quasi-zero stiffness vibration isolators floating plate railway roadbed
Method.
In order to achieve the above objectives, the technical scheme is that
Quasi-zero stiffness vibration isolators floating plate railway roadbed, it is characterised in that including floating plate, the vibration isolation group being arranged in floating plate
Part, vibration isolation component are spaced apart along floating plate length direction, it is characterised in that the vibration isolation component includes being cast in floating plate
Interior outer sleeve and the quasi-zero stiffness vibration isolators in outer sleeve are lined between the quasi-zero stiffness vibration isolators and outer sleeve
For adjusting the height-regulating gasket of floating plate height, insulation cover plate is stamped at the top of outer sleeve.
Preferably, the quasi-zero stiffness vibration isolators include linear positive rigidity elastic element and first with linear positive rigidity elasticity
Part is in parallel and can express the negative stiffness elastic element of negative stiffness characteristic in deformation process.
Preferably, the linear positive rigidity elastic element is steel spring vibration isolator, and the negative stiffness elastic element is
Butterfly spring, interior two layers for being divided into upper and lower connection by supporting baffle of outer sleeve, upper layer are installation chamber, and lower layer is support chamber
Room, steel spring vibration isolator adjust backing plate and are placed between supporting baffle and steel spring vibration isolator in support chamber, butterfly spring
It is coaxially disposed with steel spring vibration isolator, and carries respectively.
Preferably, the butterfly spring mounting base of annular, the inner wall of outer sleeve are welded on the outer wall of the steel spring vibration isolator
It is welded with the butterfly spring deck of annular, the butterfly spring deck is located in support chamber and is arranged in parallel in the upper of butterfly spring mounting base
Side, the butterfly spring is placed on steel spring vibration isolator periphery, and is arranged in flaring upwards, is against butterfly spring at the top of butterfly spring
On deck, bottom is against in butterfly spring mounting base.
Preferably, the butterfly spring fulcrum bearing of annular, the butterfly spring branch are welded on the outer wall of the steel spring vibration isolator
It is axially disposed to hold seat, passes through bearing plate washer, penetrates and install in chamber, butterfly spring is mounted in installation chamber, and in expansion downwards
Mouth is arranged, and is against on insulation cover plate at the top of butterfly spring, bottom is against in butterfly spring fulcrum bearing.
Preferably, the insulation cover plate bottom surface is fixed with the T-type mounting base with tool cooperation at the top of butterfly spring, described
T-type mounting base is located in installation chamber, is covered on the lower semisection of T-type mounting base at the top of butterfly spring, and top surface and T-type are installed
Seated connection touching.
Preferably, the steel spring vibration isolator include with outer sleeve coaxial arrangement vibration isolator sleeve, for seal every
The vibration isolator pedestal of vibration device sleeve bottom, the spiral bullet fixed with the coaxial arrangement of vibration isolator sleeve and bottom and vibration isolator pedestal
Spring, the rubber seal with vibration isolator cover board fixed at the top of helical spring, sealed connection vibration isolator cover board and vibration isolator sleeve,
Fluid damping agent is housed, the lower semisection of helical spring is dipped in fluid damping agent, fixed on vibration isolator cover board in vibration isolator sleeve
There is axially disposed dampened disk, dampened disk protrudes into helical spring, and lower part is immersed in fluid damping agent, with vibration isolator pedestal
It does not contact.
Preferably, the spacing between adjacent quasi-zero stiffness vibration isolators is 1.2 ~ 1.8 meters, the standard zero close to floating plate end
Rigidity vibration isolator between floating plate end face at a distance from be no more than 1 meter.
The design method of above-described quasi-zero stiffness vibration isolators floating plate railway roadbed, it is characterised in that according to floating plate railway roadbed
Carrying situation, design quasi-zero stiffness vibration isolators, quasi-zero stiffness vibration isolators quantity and adjacent quasi-zero stiffness vibration isolators between
Away from, carry the quasi-zero stiffness vibration isolators in the floating plate of carrying uniformly, each quasi-zero stiffness vibration isolators dynamic rate goes to zero,
Reach vibration balancing position, realizes the low frequency vibration isolation of floating plate.
Preferably, the dynamic loading of floating plate railway roadbed when being crossed according to train designs linear just rigid in quasi-zero stiffness vibration isolators
The rigidity for spending elastic element and negative stiffness elastic element makes quasi- zero stiffness when holder carrying, and negative stiffness elastic element is shown
Negative stiffness characteristic, the dynamic rate merged with linear positive rigidity elastic element go to zero, and it is flat that quasi-zero stiffness vibration isolators reach vibration
Weighing apparatus position.
Vibration isolation principle of the invention are as follows: interval setting quasi-zero stiffness vibration isolators, quasi- zero stiffness vibration isolation in floating plate railway roadbed
Device has the characteristic of positive and negative Stiffness vibration isolation, the low dynamic stiffness of high Static stiffness, and high Static stiffness can guarantee that vibration isolator will not generate
Big Static Correction, does not influence the bearing capacity and stability of floating plate track, and the load of train reaches quasi-zero stiffness vibration isolators
The positive negative stiffness of equilbrium position, quasi-zero stiffness vibration isolators merges, dynamic rate zero, and DYNAMIC LOADING OF DRIVING TRAIN ON BRIDGES lotus is in quasi- zero stiffness vibration isolation
When low amplitude vibrations are done in device equilbrium position, the dynamic rate of quasi-zero stiffness vibration isolators goes to zero, and realizes lower vibration isolation initial frequency,
Low-frequency vibration ingredient is effectively inhibited, realizes the low frequency vibration isolation of floating plate track.
The beneficial effects of the present invention are:
1, the quasi-zero stiffness vibration isolators with positive and negative Stiffness vibration isolation, the low dynamic stiffness characteristic of high Static stiffness are set to floating
It sets in plate railway roadbed, floating plate railway roadbed is made to obtain high static rigidity and low dynamic stiffness characteristic, make floating plate railway roadbed that there is high-mechanic, small
Deformability, the advantage that low frequency vibration isolation effect is good and isolation frequency range is big.
2, it is provided with the floating plate railway roadbed of quasi-zero stiffness vibration isolators, when quasi-zero stiffness vibration isolators stress reaches equilbrium position,
High Static stiffness can guarantee that vibration isolator will not generate excessive Static Correction, not influence the bearing capacity and stability of floating plate track.
3, DYNAMIC LOADING OF DRIVING TRAIN ON BRIDGES lotus is when low amplitude vibrations are done in quasi-zero stiffness vibration isolators equilbrium position, the dynamic of quasi-zero stiffness vibration isolators
Rigidity goes to zero, and realizes lower vibration isolation initial frequency, has good low frequency vibration isolation performance, effectively inhibits floating plate railway roadbed
Low-frequency vibration ingredient, realize the low frequency vibration isolation of floating plate track.
4, structure of the invention is simple, simple to install of the quasi-zero stiffness vibration isolators in floating plate, compared with the prior art
Middle use is actively and semi-active vibration-isolating device structure floating plate, its cost of manufacture are lower and feasibility is more preferable.
5, design method of the invention has designed quasi-zero stiffness vibration isolators, standard zero just according to the carrying situation of floating plate railway roadbed
The spacing between the quantity and adjacent quasi-zero stiffness vibration isolators of vibration isolator is spent, different routes, different automobile types, different travel speeds are met
Under, the low frequency vibration isolation demand of required floating plate track designs floating plate railway roadbed, floating plate for the vibration damping demand of different routes
The vibration damping reliability and applicability of track are stronger.
Detailed description of the invention
Fig. 1 is that the quasi-zero stiffness vibration isolators floating plate railway roadbed in embodiment one reaches equilbrium position in quasi-zero stiffness vibration isolators
When structural schematic diagram.
Fig. 2 is the structural schematic diagram of the quasi-zero stiffness vibration isolators in embodiment one.
Fig. 3 is the structural schematic diagram of the steel spring vibration isolator in embodiment one.
Fig. 4 is the structural schematic diagram of the quasi-zero stiffness vibration isolators in embodiment two.
Stiffness curve figure of Fig. 5 quasi-zero stiffness vibration isolators in load bearing process.
Specific embodiment
It below will the present invention will be further described by attached drawing 1 ~ 5 and embodiment.
Embodiment one:
Quasi-zero stiffness vibration isolators floating plate railway roadbed, it is characterised in that including floating plate 1, the vibration isolation being arranged in floating plate 1
Component, vibration isolation component are spaced apart along 1 length direction of floating plate, it is characterised in that the vibration isolation component is floating including being cast in
Outer sleeve 2 in plate 1 and the quasi-zero stiffness vibration isolators in outer sleeve 23, the quasi-zero stiffness vibration isolators 3 and outer sleeve 2
Between be lined with height-regulating gasket 4 for adjusting 1 height of floating plate, insulation cover plate 5 is stamped at the top of outer sleeve 2.
The quasi-zero stiffness vibration isolators 3 include linear positive rigidity elastic element and in parallel with linear just rigidity elastic element
And it can express the negative stiffness elastic element of negative stiffness characteristic in deformation process.
As shown in Figure 1, quasi-zero stiffness vibration isolators are arranged in floating plate 1, quasi-zero stiffness vibration isolators are spaced in floating plate 1
Distribution forms the floating plate railway roadbed with low frequency vibration isolation, has positive and negative Stiffness vibration isolation, spy with quasi-zero stiffness vibration isolators
Property, when train crosses, the load of train makes quasi-zero stiffness vibration isolators reach equilbrium position, quasi-zero stiffness vibration isolators it is positive and negative just
Degree merges, dynamic rate zero, and DYNAMIC LOADING OF DRIVING TRAIN ON BRIDGES lotus is when low amplitude vibrations are done in quasi-zero stiffness vibration isolators equilbrium position, quasi- zero stiffness
The dynamic rate of vibration isolator goes to zero, and realizes lower vibration isolation initial frequency, effectively inhibits to low-frequency vibration ingredient, realizes floating
The low frequency vibration isolation of plate track.And the characteristic of the low dynamic stiffness of the high Static stiffness of quasi-zero stiffness vibration isolators 3 can guarantee that vibration isolator will not produce
Raw excessive Static Correction, will not influence the bearing capacity and stability of floating plate track.
Specifically, the linear positive rigidity elastic element is steel spring vibration isolator 31, the negative stiffness elastic element
For butterfly spring 32, interior two layers for being divided into upper and lower connection by supporting baffle 21 of outer sleeve 2, upper layer is installation chamber A, and lower layer is
Chamber B is supported, steel spring vibration isolator 31 adjusts backing plate 4 and be placed in supporting baffle 21 and steel spring vibration isolator in support chamber B
Between 31, butterfly spring 32 and steel spring vibration isolator 31 are coaxially disposed, and are carried respectively.When train crosses, train load effect
On track, each quasi-zero stiffness vibration isolators share weight in train length, as shown in figure 5, steel spring vibration isolator 31 is carrying
Stiffness characteristics in the process are linear positive rigidity, and butterfly spring 32 is non-linear rigidity, when butterfly spring 32 reaches pressing shape
When state, i.e. the state of butterfly spring in Fig. 1 can provide negative stiffness, at this time positive rigidity and negative rigid in entire quasi-zero stiffness vibration isolators
The merging rigidity of degree is zero, and quasi-zero stiffness vibration isolators reach equilbrium position, i.e., horizontal in the stiffness curve of quasi-zero stiffness vibration isolators
Coordinate is the stain position of X0, that is to say, that when the deflection of steel spring vibration isolator 31 and butterfly spring 32 is X0, is had
The positive linear coil springs of rigidity and the disc spring with negative stiffness carry static pressure respectively and reach standing balance, work as DYNAMIC LOADING OF DRIVING TRAIN ON BRIDGES
Lotus is near quasi-zero stiffness vibration isolators equilbrium positionWhen doing micro breadth oscillation in range, from figure 5 it can be seen thatRange is quasi-
The dynamic rate of Zero-rigidity vibration isolator goes to zero, to realize lower vibration isolation initial frequency, effectively inhibits low frequency vibration
Ingredient realizes low frequency vibration isolation.
Wherein, be welded on the outer wall of the steel spring vibration isolator 31 annular butterfly spring mounting base 33, outer sleeve 1 it is interior
Wall is welded with the butterfly spring deck 34 of annular, and the butterfly spring deck 34 is located in support chamber B and is arranged in parallel in butterfly spring installation
The top of seat 33, the butterfly spring 32 are placed on 31 periphery of steel spring vibration isolator, and in flaring setting upwards, butterfly spring 32
Top be against on butterfly spring deck 34, bottom is against in butterfly spring mounting base 33.Butterfly spring 32 is arranged in butterfly spring mounting base 33
Between butterfly spring deck 34, when guaranteeing carrying, butterfly spring 32 and the difference of steel spring vibration isolator 31 and synchronous bearer, quasi- zero stiffness
The bearing capacity of the static deformation amount of vibration isolator, the i.e. deflection of steel spring vibration isolator 31, floating plate railway roadbed does not reduce, from
And make floating plate track that there is preferable stability.
Specifically, the steel spring vibration isolator 31 includes the vibration isolator sleeve 31.1 being coaxially disposed with outer sleeve 2, is used for
The vibration isolator pedestal 31.2 of sealing 31.1 bottom of vibration isolator sleeve and the coaxial arrangement of vibration isolator sleeve 31.1 and bottom and vibration isolator
The fixed helical spring 31.3 of pedestal 31.2, with vibration isolator cover board 31.4 fixed at the top of helical spring 31.3, be tightly connected every
It shakes the rubber seal 31.5 of device cover board 31.4 and vibration isolator sleeve 31.1, fluid damping agent is housed in vibration isolator sleeve 31.1
31.6, the lower semisection of helical spring 31.3 is dipped in fluid damping agent 31.6, is fixed on vibration isolator cover board 31.4 and is set along axial direction
The dampened disk 31.7 set, dampened disk 31.7 protrude into helical spring 31.3, and lower part is immersed in fluid damping agent 31.6, with vibration isolation
Device pedestal 31.3 does not contact.As shown in figure 3, vibration isolator sleeve 31.1, vibration isolator pedestal 31.2, vibration isolator cover board 31.4 and rubber
Space in the vibration isolator of the composition sealing of sealing ring 31.5, wherein placing the helical spring 31.3 with linear positive stiffness characteristics, tool
There are a fluid damping agent 31.6 of damping function and the dampened disk 31.7 with limit function, when carrying under vibration isolator cover board 31.4
Pressure, compression helical spring 31.3, dampened disk 31.7 moves downward, since the lower end of dampened disk 31.7 and helical spring 31.3 is soaked
Enter in fluid damping agent 31.6, the damping force for keeping dampened disk 31.7 and helical spring 31.3 suffered when moving downward is bigger, steel bomb
The bearing capacity of spring vibration isolator is higher, and dampened disk 31.7 can be limited with vibration isolator pedestal 31.3 and be contacted, and protects steel spring vibration isolator
Permanent deformation is generated because carrying is excessive.And the load metamorphism amount of quasi-zero stiffness vibration isolators, as steel spring vibration isolator are held
Deflection is carried, so the bearing capacity of steel spring vibration isolator is higher, i.e. the bearing capacity of quasi-zero stiffness vibration isolators is higher, to protect
Stability of the floating plate railway roadbed in load bearing process is demonstrate,proved.
Wherein, the spacing between adjacent quasi-zero stiffness vibration isolators 3 is 1.2 ~ 1.8 meters, the standard zero close to 1 end of floating plate
Rigidity vibration isolator 3 between 1 end face of floating plate at a distance from be no more than 1 meter.In practical structures, according to the carrying situation of floating plate railway roadbed
With the stiffness characteristics of butterfly spring and steel spring vibration isolator in quasi-zero stiffness vibration isolators 3, floated quasi-zero stiffness vibration isolators 3 are arranged
Set the distribution in plate 1, when in order to guarantee that train crosses, the quasi-zero stiffness vibration isolators 3 in train length can share stress equally, it is adjacent every
Shake device between spacing be 1.2 ~ 1.8 meters, close to 1 end of floating plate 1 end face of quasi-zero stiffness vibration isolators 3 and floating plate between away from
From being no more than 1 meter, carry the quasi-zero stiffness vibration isolators 3 in train length uniformly, quasi-zero stiffness vibration isolators 3 are realized substantially and synchronized
Reach equilbrium position, realizes the low frequency vibration isolation of floating plate track.
Embodiment two:
With embodiment one the difference is that the installation site of butterfly spring, butterfly spring is mounted in the present embodiment
It fills in cavity A, as shown in figure 4, the butterfly spring fulcrum bearing 35 of annular is welded on the outer wall of the steel spring vibration isolator 31, it is described
Butterfly spring fulcrum bearing 35 it is axially disposed, pass through bearing plate washer 21, penetrate installation chamber A in, butterfly spring 32 be mounted in installation cavity
It in the A of room, and is against on insulation cover plate 5 in flaring setting, the top of butterfly spring 32 downwards, bottom is against butterfly spring fulcrum bearing 35
On.
5 bottom surface of insulation cover plate is fixed with and the T-type mounting base 36 that has cooperation at the top of butterfly spring 32, the T
Type mounting base 36 is located in installation chamber A, and the top of butterfly spring 32 covers on the lower semisection of T-type mounting base 36, and top surface and T
Type mounting base 36 contacts.T-type mounting base 36 is used to position butterfly spring 32, and in carrying, from the top down to butterfly spring
32 pressurizations.
The carrying loading process of embodiment two is the same as example 1, in order to facilitate the peace of quasi-zero stiffness vibration isolators
Steel spring vibration isolator 31 is pressed into the outer sleeve 2 being cast in floating plate 1 by dress, is then pushed steel spring vibration isolator 31 and is placed
Gasket 4 is turned up, makes the rising of floating plate 1 and surface separation, the height-regulating gasket 4 of suitable thickness is put into according to practical structures demand, adjust
The gap of floating plate 1 and ground is saved, butterfly spring 32 is put into installation chamber A again later, finally covers insulation cover plate 5.
The present invention also protects the design method of above-described quasi-zero stiffness vibration isolators floating plate railway roadbed, it is characterised in that root
According to the carrying situation of floating plate railway roadbed, quasi-zero stiffness vibration isolators 3, the quantity of quasi-zero stiffness vibration isolators 3 and adjacent quasi- zero have been designed just
The spacing between vibration isolator 3 is spent, carries the quasi-zero stiffness vibration isolators 3 in the floating plate 1 of carrying uniformly, each quasi- zero stiffness vibration isolation
3 dynamic rate of device goes to zero, and reaches vibration balancing position, realizes the low frequency vibration isolation of floating plate.
Specifically, since, with the change of operation road conditions, the load of floating plate track is also subsequently formed dynamic on same route
State variation, thus when being crossed according to train floating plate railway roadbed dynamic loading, design linear positive rigidity bullet in quasi-zero stiffness vibration isolators 3
Property element and negative stiffness elastic element rigidity, make quasi- zero stiffness when holder 3 carries, negative stiffness elastic element shows negative rigid
Characteristic is spent, the dynamic rate merged with linear positive rigidity elastic element goes to zero, and quasi-zero stiffness vibration isolators 3 reach vibration balancing position
It sets.
Since under different routes, different automobile types and different travel speeds, load suffered by track is different, above-mentioned design method
Floating plate railway roadbed is designed according to different bearer, to meet under different routes, different automobile types, different travel speeds, floating plate rail
The low frequency vibration isolation demand in road designs floating plate railway roadbed, the vibration damping reliability of floating plate track for the vibration damping demand of different routes
It is stronger with applicability.
It is completely described in conjunction with technical solution of the attached drawing to the embodiment of the present invention above, it should be noted that described
Embodiment is only a part of the embodiment of the present invention.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Claims (7)
1. quasi-zero stiffness vibration isolators floating plate railway roadbed, including floating plate (1), the vibration isolation component being arranged in floating plate (1), vibration isolation
Component is spaced apart along floating plate (1) length direction, it is characterised in that the vibration isolation component includes being cast in floating plate (1)
Outer sleeve (2) and the quasi-zero stiffness vibration isolators (3) in outer sleeve (2), the quasi-zero stiffness vibration isolators (3) and housing
The height-regulating gasket (4) for adjusting floating plate (1) height is lined between cylinder (2), outer sleeve is stamped insulation cover plate at the top of (2)
(5)；
The quasi-zero stiffness vibration isolators (3) include linear positive rigidity elastic element and it is in parallel with linear just rigidity elastic element and
It can express the negative stiffness elastic element of negative stiffness characteristic in deformation process；
The linear positive rigidity elastic element is steel spring vibration isolator (31), and the negative stiffness elastic element is butterfly spring
(32), it is divided into two layers of upper and lower connection in outer sleeve (2) by supporting baffle (21), upper layer is installation chamber (A), and lower layer is branch
It supports chamber (B), steel spring vibration isolator (31) is turned up gasket (4) and is placed in supporting baffle (21) and steel bomb in support chamber (B)
Between spring vibration isolator (31), butterfly spring (32) and steel spring vibration isolator (31) are coaxially disposed, and are carried respectively；
The butterfly spring fulcrum bearing (35) of annular, the butterfly spring fulcrum bearing are welded on the outer wall of the steel spring vibration isolator (31)
(35) axially disposed, bearing plate washer (21) is passed through, is penetrated in installation chamber (A), butterfly spring (32) is mounted in installation chamber (A)
In, and be arranged in flaring downwards, it is against on insulation cover plate (5) at the top of butterfly spring (32), bottom is against butterfly spring fulcrum bearing
(35) on.
2. quasi-zero stiffness vibration isolators floating plate railway roadbed according to claim 1, it is characterised in that the steel spring vibration isolation
The butterfly spring mounting base (33) of annular is welded on the outer wall of device (31), the inner wall of outer sleeve (1) is welded with the butterfly spring deck of annular
(34), the butterfly spring deck (34) is located in support chamber (B) and is arranged in parallel in the top of butterfly spring mounting base (33), described
Butterfly spring (32) be placed on steel spring vibration isolator (31) periphery, and in flaring setting upwards, the top of butterfly spring (32) is supported
On butterfly spring deck (34), bottom is against on butterfly spring mounting base (33).
3. quasi-zero stiffness vibration isolators floating plate railway roadbed according to claim 1, it is characterised in that the insulation cover plate (5)
Bottom surface is fixed with the T-type mounting base (36) with cooperation at the top of butterfly spring (32), and the T-type mounting base (36) is located at installation cavity
In room (A), butterfly spring covers on the lower semisection of T-type mounting base (36) at the top of (32), and top surface connects with T-type mounting base (36)
Touching.
4. quasi-zero stiffness vibration isolators floating plate railway roadbed according to claim 1, it is characterised in that the steel spring vibration isolation
Device (31) includes with the vibration isolator sleeve (31.1) of outer sleeve (2) coaxial arrangement, for sealing vibration isolator sleeve (31.1) bottom
Vibration isolator pedestal (31.2), with the fixed spiral shell of vibration isolator sleeve (31.1) coaxial arrangement and bottom and vibration isolator pedestal (31.2)
Revolve spring (31.3), the vibration isolator cover board (31.4) with fixing at the top of helical spring (31.3), sealed connection vibration isolator cover board
(31.4) and the rubber seal (31.5) of vibration isolator sleeve (31.1) fluid damping agent, is housed in vibration isolator sleeve (31.1)
(31.6), the lower semisection of helical spring (31.3) is dipped in fluid damping agent (31.6), and vibration isolator cover board is fixed on (31.4)
Axially disposed dampened disk (31.7), dampened disk (31.7) protrude into helical spring (31.3), and fluid damping is immersed in lower part
In agent (31.6), do not contacted with vibration isolator pedestal (31.3).
5. quasi-zero stiffness vibration isolators floating plate railway roadbed according to claim 1, it is characterised in that adjacent quasi- zero stiffness every
Spacing between vibration device (3) is 1.2 ~ 1.8 meters, quasi-zero stiffness vibration isolators (3) and floating plate (1) close to floating plate (1) end
Distance between end face is no more than 1 meter.
6. claim 1 is to the design method of the described in any item quasi-zero stiffness vibration isolators floating plate railway roadbeds of claim 5, special
Sign is the carrying situation according to floating plate railway roadbed, design quasi-zero stiffness vibration isolators (3), the quantity of quasi-zero stiffness vibration isolators (3)
Spacing between adjacent quasi-zero stiffness vibration isolators (3) holds the quasi-zero stiffness vibration isolators (3) in the floating plate (1) of carrying uniformly
It carries, each quasi-zero stiffness vibration isolators (3) dynamic rate goes to zero, reaches vibration balancing position, realize the low frequency vibration isolation of floating plate.
7. the design method of quasi-zero stiffness vibration isolators floating plate railway roadbed according to claim 6, it is characterised in that according to column
The dynamic loading of floating plate railway roadbed when vehicle crosses designs linear positive rigidity elastic element and negative stiffness in quasi-zero stiffness vibration isolators (3)
The rigidity of elastic element makes quasi- zero stiffness when holder (3) carry, and negative stiffness elastic element shows negative stiffness characteristic, with line
Property the dynamic rate that merges of positive rigidity elastic element go to zero, quasi-zero stiffness vibration isolators (3) reach vibration balancing position.
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| CN108980246B (en) * | 2018-09-10 | 2019-12-27 | 东北大学 | Vibration isolator based on quasi-zero rigidity |
| CN109837807A (en) * | 2019-01-21 | 2019-06-04 | 株洲时代新材料科技股份有限公司 | A kind of track floating plate vibration isolator |
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| CN110725159A (en) * | 2019-09-16 | 2020-01-24 | 北京工业大学 | Quasi-zero stiffness floating slab track bed system based on positive and negative stiffness parallel connection |
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| CN112900158A (en) * | 2020-12-29 | 2021-06-04 | 北京九州一轨环境科技股份有限公司 | Vibration isolator and inner sleeve thereof |
| CN112816115B (en) * | 2020-12-30 | 2022-06-03 | 隔而固(青岛)振动控制有限公司 | Stress detection method and measuring tool for elastic vibration isolator in built-in floating slab track bed |
| CN113047092A (en) * | 2021-03-29 | 2021-06-29 | 中铁第一勘察设计院集团有限公司 | Electromagnetic variable-rigidity self-adjusting steel spring floating slab track system and vibration isolator |
| CN113551000B (en) * | 2021-07-09 | 2022-05-06 | 浙江大学 | Vibration isolation device of lower hanging structure |
| CN114990939A (en) * | 2022-07-21 | 2022-09-02 | 株洲时代新材料科技股份有限公司 | Spring vibration isolator for floating slab track bed and jacking method of floating slab track bed |
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