CN109538686A - The three-dimensional vibration absorber and design method of totally enclosed type sound barrier on a kind of high metal bridge - Google Patents
The three-dimensional vibration absorber and design method of totally enclosed type sound barrier on a kind of high metal bridge Download PDFInfo
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- CN109538686A CN109538686A CN201811442878.5A CN201811442878A CN109538686A CN 109538686 A CN109538686 A CN 109538686A CN 201811442878 A CN201811442878 A CN 201811442878A CN 109538686 A CN109538686 A CN 109538686A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Abstract
The invention discloses the three-dimensional vibration absorbers and design method of totally enclosed type sound barrier on a kind of high metal bridge, the device includes upper component and lower component, upper component includes upper plate, upper plate both ends are provided with riser, upper plate bottom surface is provided with limit steel plate, lower component includes lower plate, lower plate two sides are provided with lower riser, two-way energy consuming components are provided between upper riser and lower riser, two-way energy consuming components include fixation steel plate and sliding steel plate, vertical energy consuming components are provided between upper plate and lower plate, vertical energy consuming components include outer cylinder and inner cylinder, outer cylinder is arranged on movable steel plate, inner cylinder is arranged on lower plate, several rotating limit devices are provided between upper plate and lower plate；The invention also discloses the design methods of the three-dimensional vibration absorber.Present invention can be implemented in horizontal directions, vertical and rotation direction three-dimensional vibration damping and limit function, protect noise barrier structure.
Description
Technical field
The invention belongs to high metal bridge vibration absorber and method and technology fields, and in particular to totally enclosed type on to a kind of high metal bridge
The three-dimensional vibration absorber and design method of sound barrier.
Background technique
With the fast development of domestic high-speed rail and the raising of common people's environmental consciousness, vibration and noise pair caused by train is passed a bridge
The environment influence of sensitizing range is gradually paid attention to, and various noise barrier structure obtains in railway, highway and rail traffic bridge
A large amount of utilization is arrived.The vertical type sound barrier being widely used at present, height is generally 2.15~3.15m, using being cast in bridge
U-shaped muscle inside beam flange plate is fixed together with sound barrier suspension column, but the noise reduction effect of vertical type sound barrier is very limited, closely
Begin to use totally enclosed type or semi-enclosed sound barrier to increase noise reduction effect in engineering over year.However, it is limited by limit factor,
It is 12m tall and slender structure that totally enclosed type sound barrier, which has to be designed as height more than 8m, transverse width, on bridge, so the vibration of sound barrier
Dynamic disease and resulting safety problem are urgently to be resolved.
When bullet train passes through towering sound barrier, the movement of train will lead to surrounding air and generate strong disturbance,
And the pulsating wind pressure changed over time is generated on sound barrier, weakness (such as being bolted place) is connected so as to cause sound barrier
Flutter failure or fatigue failure.For totally enclosed type sound barrier on bridge, since the spacing of sound barrier and track is small, when speed reaches
When 350km/h or higher, this problem will become extremely severe.The connection type of existing totally enclosed type sound barrier and bridge is still
It is so to copy vertical type sound barrier, i.e. its basis flange plate outer edge for being usually mounted to bridge.The wheel-rail impact of bullet train
Energy is transmitted to each position of bridge by track structure.For bridge flange plate, " whipping effect " will make the region
Local vibration is very violent, and the basis of totally enclosed type sound barrier must not be not arranged in bridge flange plate end.Therefore, wheel track
The vibration of sound barrier brought by motivating is same very important.In addition, high, long, narrow feature is integrally presented in totally enclosed type sound barrier,
It is different from general building structure, tall and slender structure body.Its support construction is by assembled big of the biggish rod piece of slenderness ratio
Type skeleton structure, front face area is big, whole light, is influenced especially severe by environmental excitations such as typhoon, earthquake loads, once go out
Existing flutter failure problem, just very likely leads to serious traffic safety accident.Therefore, it is necessary to a kind of vibration absorber is designed,
Can successfully be dissipated train fluctuating wind and wheel track excitation energy, and can be when typhoon, earthquake occurs when protect sound-screen
Hinder structure.
Summary of the invention
In view of the above deficiencies, the present invention provides the three-dimensional vibration absorber and design of totally enclosed type sound barrier on a kind of high metal bridge
Method protects noise barrier structure, it can be achieved that in horizontal direction, vertical and rotation direction three-dimensional vibration damping and limit function.
To achieve the above object, the technical solution adopted by the present invention to solve the technical problems is: providing a kind of high metal bridge
The three-dimensional vibration absorber of upper totally enclosed type sound barrier, including upper component and lower component, upper component are arranged right above lower component, on
Component includes upper plate, and upper plate both ends are provided with riser, and upper plate bottom surface is provided with limit steel plate, and lower component includes bottom
Plate, lower plate two sides are provided with lower riser, and two-way energy consuming components, two-way energy consuming components packet are provided between upper riser and lower riser
Include fixation steel plate and sliding steel plate, fixation steel plate and sliding steel plate are in H-type, and between be provided with several elastomers, on upper riser
Be provided with the matched sliding groove of sliding steel plate, be provided on lower riser with the matched fixing groove of fixation steel plate, upper plate and under
Vertical energy consuming components are provided between bottom plate, vertical energy consuming components include outer cylinder and inner cylinder, and outer cylinder is arranged in movable steel
On plate, tube plug is provided in outer cylinder, inner cylinder is arranged on lower plate, and the annular groove between outer cylinder and tube plug
Interior, inner cylinder diameter is greater than tube plug diameter, and outer cylinder diameter is greater than inner cylinder diameter, is provided with shock-absorbing spring in inner cylinder, and
It is provided with several rotating limit devices filled with damping agent, between upper plate and lower plate, several fixations are provided on upper plate
Bolt is provided with several fixation holes on lower plate.
The beneficial effect of the present apparatus is: when device is by load, relative displacement occurs between upper component and lower component, on
The two-way energy consuming components of lateral extrusion during riser and lower riser are close to each other are realized by the tension and compression deformation and recovery of elastomer
Horizontal direction energy consumption realizes rotation direction energy consumption by shear-deformable and recovery, thus realize the purpose of both direction vibration damping, on
Component and the lower component vertical energy consuming components of extruding close to each other, pass through the deformation of shock-absorbing spring and damping agent, realize vertical direction
Passive energy dissipation, and rotating limit device then realizes the passive energy dissipation of rotation direction；In the case of extreme load, upper component and the following group
The horizontal relative displacement of part reaches maximum, limits steel plate and lower riser is in contact, and becomes the main of horizontal direction instead of elastomer
Force structure plays the role of Horizontal limiting to limit the horizontal relative displacement of upper component and lower component；Extreme load situation
Under, vertical motion is excessive, and shock-absorbing spring and damping agent generate moderate finite deformation, so that inner cylinder is in annular groove inner impact to movable steel
The bottom surface of plate becomes the main force structure of vertical direction instead of shock-absorbing spring and damping agent, is achieved in vertical spacing；Rotation
Limiting device then realizes rotary spacing；Horizontal direction upper limit steel plate and movable steel plate sliding contact slide steel on vertical direction
Plate slides in lower riser, and rotating limit device does not generate vertical or horizontal constraint to upper component, it can be achieved that level, vertical
And the decoupling of rotation direction.
Further, rotating limit device includes upper hinge and lower hinge, and upper hinge and lower hinge are separately positioned on upper plate
On lower plate, upper hinge and lower hinge pass through the connecting plate and pin hinge connection to match, are provided with upper end hole on connecting plate, on
Stomidium length is greater than pin and cuts with scissors diameter.
Beneficial effect using above-mentioned further scheme is: connecting plate and lower hinge can cut with scissors opposite turn by the pin of lower end
It is dynamic；Connecting plate and upper hinge can both be cut with scissors by the pin of upper end to produce relative rotation, and opposite position can also be generated by upper end hole
It moves, the setting of rotating limit device allows component to generate the rotation of certain angle under load action, can also be by limited
The upper end hole of length limits maximum rotation angle；In the case of extreme load, in rotation process, the upper end of side pin hinge is to moving down
It is dynamic, until touching the bottom of upper end hole, reach rotational limitation, the upper end pin hinge of the other side moves up, until touching
The top of stomidium reaches rotational limitation, realizes rotary spacing function.
Further, poly- four are provided in sliding groove, between movable steel plate and limit steel plate, between outer cylinder and inner cylinder
Vinyl fluoride coating.
Beneficial effect using above-mentioned further scheme is: polytetrafluorethylecoatings coatings are corrosion-resistant, weatherability, while in solid
Coefficient of friction is minimum in material, can have certain lubricating action, and surface tension is minimum, does not adhere to any substance.
Further, inner cylinder top surface is provided with rubber ring.
Beneficial effect using above-mentioned further scheme is: rubber ring reduces inner cylinder when vertical displacement reaches maximum
Position limiting structure is protected in impact to movable steel plate.
Further, limit steel plate two sides are provided with rubber pad.
Beneficial effect using above-mentioned further scheme is: rubber pad reduces movable steel when horizontal displacement reaches maximum
Impact between plate and lower riser, level of protection position limiting structure.
Further, vibration absorber lower part is mounted on the pre-buried U-shaped muscle of bridge flange plate by fixation hole, vibration absorber top
It is fixed by fixing bolt and noise barrier stand column.
Beneficial effect using above-mentioned further scheme is: it is convenient for site operation, can farthest ensures installation quality,
And late maintaining can be facilitated to repair.
The design method of the three-dimensional vibration absorber of totally enclosed type sound barrier on above-mentioned high metal bridge comprising following steps:
S1, according to train, the mechanics parameter of bridge and totally enclosed type sound barrier, it is solid by vehicle bridge coupling vibration theory and stream
Coupled wave theory obtains the totally enclosed type sound barrier magnitude of vibrations under train fluctuating wind and wheel track excitation synergy, and according to phase
Criterion restriction requirement is closed, determines the vibration damping target of totally enclosed type sound barrier；
S2, using rigidity and damping as key mechanics parameter, respectively with corresponding horizontal translation, vertical translation and what is rotated subtracting
Vibration unit simulates three-dimensional vibration absorber, and then determines the mechanics parameter of achievable vibration damping target；
S3, according to the mechanics parameter for the damper unit for realizing horizontal translation and rotation, to the quantity, spacing, ruler of elastomer
Very little, material parameter is designed；According to the mechanics parameter for realizing the damper unit being vertically translatable, to shock-absorbing spring and the damping
Quantity, size, the material parameter of agent are designed；
S4, energy consuming components entirely ineffective extreme case is considered under the premise of extreme load, it is true by structural stress analysis
Determine sound barrier and do not occur the limit demand that globality collapses, and then obtains limit steel plate and the gap of lower riser, inner cylinder and outer
The height of cylinder and gap, the size of sliding groove, the size of the spacing of rotating limit device and upper end hole.
Advantage of the process is that
1. this method has comprehensively considered complete caused by train fluctuating wind and wheel track excitation synergy compared to conventional method
Closed noise barrier vibration.When train passes through, wheel track excitation is transferred on device by box beam flange plate, by shock-absorbing spring and
The process dissipation vibrational energy that damping agent deforms and restores in vertical interior Repeated Compression, to reduce vertical motion to sound barrier
Transmitting, train fluctuating wind directly acts on sound barrier, and horizontal vibration and rotation are transferred on device by sound barrier, pass through elasticity
The horizontal tension and compression deformation of body and vertical non-uniform shear-deformable dissipation vibrational energy, to reduce the horizontal direction and rotation of sound barrier
The vibration of freedom degree.
2. the present invention is put down in horizontal translation, vertically compared to the fixed form for being directly connected to noise barrier stand column using U-shaped muscle
It moves and rotates and carried out a degree of release in these three freedom degrees, so that under identical load action, vibration damping dress of the present invention
It sets and generates smaller internal force, meanwhile, when vibration is transferred to vibration absorber, it can be become by the tension and compression of two-way energy consuming components elastomer
Three-dimensional damping energy dissipation is realized in the compressive deformation of shock-absorbing spring and damping agent in shape and non-uniform shear-deformable and vertical energy consuming components,
Three-dimensional damping effect is played to sound barrier.On the other hand, sliding steel plate can slide along the vertical direction in the sliding groove of upper riser,
Inner cylinder can slide along the vertical direction in the annular groove between outer cylinder and tube plug, and upper component can pass through limit steel plate and activity
The contact surface of steel plate slides in the horizontal direction, and upper component can be rotated by rotating limit device.
3. vibration absorber horizontal direction upper limit steel plate of the present invention and movable steel plate sliding contact, steel is slided on vertical direction
Plate slides in the sliding groove of upper riser, and rotating limit device does not generate vertical or horizontal constraint to upper component, can avoid
Vibration absorber horizontal translation vertical is translatable and rotation interferes with each other.
4. vibration absorber of the present invention passes through setting level, vertical and rotation three degree of freedom limit for extreme load situation
Position measure limits the maximum displacement of vibration absorber, can effectively avoid two-way energy consuming components and vertical consumption under extreme load
When energy component is entirely ineffective, totally enclosed type sound barrier does not occur globality and collapses.
Detailed description of the invention
Fig. 1 is schematic diagram of the invention；
Fig. 2 is cross-sectional view of the invention；
Fig. 3 is the schematic diagram of upper component；
Fig. 4 is the schematic diagram of lower component；
Fig. 5 is the schematic diagram of outer cylinder；
Fig. 6 is the schematic diagram of two-way energy consuming components；
Fig. 7 is the schematic diagram of rotating limit device；
Wherein, 1, upper component；11, upper plate；12, upper riser；13, sliding groove；14, steel plate is limited；2, lower component；21,
Lower plate；22, lower riser；23, fixing groove；3, vertical energy consuming components；31, outer cylinder；32, movable steel plate；33, inner cylinder；34,
Shock-absorbing spring；35, damping agent；36, tube plug；37, annular groove；4, two-way energy consuming components；41, fixation steel plate；42, sliding steel plate；
43, elastomer；5, rotating limit device；51, upper hinge；52, lower hinge；53, connecting plate；54, pin hinge；55, upper end hole；6, solid
Determine bolt；7, rubber pad；8, fixation hole；9, rubber ring.
Specific embodiment
Specific embodiments of the present invention will be described in detail with reference to the accompanying drawing.
In one embodiment of the present of invention, as shown in figs. 1-7, three of totally enclosed type sound barrier on a kind of high metal bridge are provided
To vibration absorber, including upper component 1 and lower component 2, right above lower component 2, upper component 1 includes upper plate for the upper setting of component 1
11,11 both ends of upper plate are provided with riser 12, and 11 bottom surface of upper plate is provided with limit steel plate 14, and lower component 2 includes lower plate
21,21 two sides of lower plate are provided with lower riser 22, and two-way energy consuming components 4 are provided between upper riser 12 and lower riser 22, two-way
Energy consuming components 4 include fixation steel plate 41 and sliding steel plate 42, and fixation steel plate 41 and sliding steel plate 42 are in H-type, and between be provided with
Several elastomers 43, be provided on upper riser 12 with the matched sliding groove 13 of sliding steel plate 42, be provided on lower riser 22 with it is solid
Determine the matched fixing groove 23 of steel plate 41, when device is by load, relative displacement occurs between upper component 1 and lower component 2, it is upper perpendicular
The two-way energy consuming components 4 of lateral extrusion during plate 12 and lower riser 22 are close to each other, by the tension and compression deformation of elastomer 43 and extensive
Horizontal direction energy consumption is realized again, rotation direction energy consumption is realized by shear-deformable and recovery, to realize both direction vibration damping
Purpose；It is provided with vertical energy consuming components 3 between upper plate 11 and lower plate 21, vertical energy consuming components 3 include outer cylinder 31 and interior
Cylinder 33, outer cylinder 31 are arranged on movable steel plate 32, and tube plug 36 is provided in outer cylinder 31, and inner cylinder 33 is arranged in lower plate
On 21, and between outer cylinder 31 and tube plug 36,33 diameter of inner cylinder is greater than 36 diameter of tube plug, and 31 diameter of outer cylinder is greater than interior
33 diameter of cylinder is provided with shock-absorbing spring 34 in inner cylinder 33, and is filled with damping agent 35, and upper component 1 and lower component 2 are mutually leaned on
Vertical energy consuming components 3 are closely squeezed, by the deformation of shock-absorbing spring 34 and damping agent 35, realize the passive energy dissipation of vertical direction；On
It is provided with several fixing bolts 6 on top plate 11, several fixation holes 8 are provided on lower plate 21, for fixing vibration absorber.
In the case of extreme load, the horizontal relative displacement of upper component 1 and lower component 2 reaches maximum, and limit steel plate 14 is under
Riser 22 is in contact, and becomes the main force structure of horizontal direction instead of elastomer 43, to limit upper component 1 and lower component 2
Relative displacement, play the role of Horizontal limiting；In the case of extreme load, vertical motion is excessive, shock-absorbing spring 34 and damping agent 35
Generate moderate finite deformation so that inner cylinder 33 37 inner impact of annular groove to activity steel plate 32 bottom surface, instead of 34 He of shock-absorbing spring
Damping agent 35 becomes the main force structure of vertical direction, is achieved in vertical spacing；Horizontal direction upper limit steel plate 14 and work
32 sliding contact of steel plate is moved, sliding steel plate 42 slides in sliding groove 13 on vertical direction, and rotating limit device 5 is not to upper group
Part 1 generates vertical or horizontal constraint, it can be achieved that horizontal, vertical and rotation direction decoupling.
Rotating limit device 5 includes upper hinge 51 and lower hinge 52, and upper hinge 51 and lower hinge 52 are separately positioned on top
On plate 11 and lower plate 21, upper hinge 51 and lower hinge 52 pass through 54 connection of the connecting plate 53 to match and pin hinge, connecting plate 53
On be provided with upper end hole 55,55 length of upper end hole is greater than pin and cuts with scissors 54 diameters；Connecting plate 53 and lower hinge 52 can pass through the pin of lower end
Hinge 54 relatively rotates；Connecting plate 53 and upper hinge 51 both can cut with scissors 54 by the pin of upper end and produce relative rotation, and can also pass through
Upper end hole 55 generates relative displacement, and the setting of rotating limit device 5 allows component 1 to generate certain angle under load action
Rotation can also limit maximum rotation angle by the upper end hole 55 of finite length, in the case of extreme load, in rotation process,
The upper end pin hinge 54 of side moves down, until touching the bottom of upper end hole 55, reaches rotational limitation, the upper end pin of the other side
Hinge 54 moves up, until touching the top of upper end hole 55, reaches rotational limitation, realizes rotary spacing function.
It is provided in sliding groove 13, between movable steel plate 32 and limit steel plate 14, between outer cylinder 31 and inner cylinder 33
Polytetrafluorethylecoatings coatings, polytetrafluorethylecoatings coatings are corrosion-resistant, weatherability, while coefficient of friction is minimum in solid material, can have
There is certain lubricating action, and surface tension is minimum, does not adhere to any substance；33 top surface of inner cylinder is provided with rubber ring 9, rubber
Circle 9 reduces the impact of 33 pairs of inner cylinder movable steel plates 32, protects position limiting structure when vertical displacement reaches maximum；Limit steel plate
14 two sides are provided with rubber pad 7, and rubber pad 7 is when horizontal displacement reaches maximum, between reduction activity steel plate 32 and lower riser 22
Impact, level of protection position limiting structure.
Two-way energy consuming components 4 are between upper riser 12 and lower riser 22, by sliding steel plate 42, elastomer 43 and fixed steel
Plate 41 bonds, and the material that rubber, polyurethane etc. have favorable elasticity and energy-dissipating property can be used in elastomer 43.Subtracting
In the manufacturing process of vibrating device, two-way energy consuming components 4 can independently be made, and the filling of damping agent 35 to be done and the lower of upper component 1 are buckled
Later, two-way energy consuming components 4 are pressed along bridge from the two sides that vibration absorber is open to push-in, fixation steel plate 41 is pushed into lower riser 22
It is locked in fixing groove 23, sliding steel plate 42 is pushed into the sliding groove 13 of upper riser 12, but opposite can be slided in vertical direction, is avoided
That horizontally and vertically vibrates interferes with each other.Inner cylinder 33 is consolidated in lower plate 21, constitutes cylinder bottom and the cylinder of vertical energy consuming components 3
Body, outer cylinder 31 are wrapped in inner cylinder 33 outside, and the inner face of outer cylinder 31 and the outside of inner cylinder 33 are in contact, and the two can be in contact surface
On slide along the vertical direction, shock-absorbing spring 34 is arranged in the inner space of barrel structure, remaining remaining space is filled damping agent 35, made
With in the process, barrel structure remains that inner space is closed, and vertical energy consuming components 3 pass through the pressure of movable steel plate 32 and outer cylinder 31
Contracting is so that shock-absorbing spring 34 and damping agent 35 are deformed in cylinder, to realize energy consumption.Upper hinge 51 and lower hinge 52 are solid respectively
Knot is on upper plate 11 and lower plate 21, and by 54 connection of connecting plate 53 and pin hinge, connecting plate 53 and upper hinge 51 can both lead to
The pin hinge 54 for crossing upper end produces relative rotation, and can also generate relative displacement, the setting of rotating limit device 5 by upper end hole 55
Allow component 1 to generate the rotation of certain angle under load action, can also be limited most by the upper end hole 55 of finite length
Big rotational angle.Vibration absorber is mounted on the pre-buried U-shaped muscle of bridge flange plate by fixation hole 8, and noise barrier stand column is fixed on this
On the fixing bolt 6 of device.
The design method of the three-dimensional vibration absorber of totally enclosed type sound barrier on above-mentioned high metal bridge, comprising the following steps:
S1, according to train, the mechanics parameter of bridge and totally enclosed type sound barrier, it is solid by vehicle bridge coupling vibration theory and stream
Coupled wave theory obtains the totally enclosed type sound barrier magnitude of vibrations under train fluctuating wind and wheel track excitation synergy, and according to phase
Criterion restriction requirement is closed, determines the vibration damping target of totally enclosed type sound barrier.
When being not provided with vibration absorber between bridge and totally enclosed type sound barrier, is constrained with principal and subordinate and simulate company between the two
It connects.The prior art is respectively adopted to count the totally enclosed type sound barrier vibration under train fluctuating wind and wheel track excitation independent role
It calculates, is finally overlapped, to obtain global response.Wherein, response caused by train fluctuating wind is mainly in several hertz hereinafter, institute
To need to carry out low-pass filtering treatment to vibratory response, it is preferable that upper limiting frequency is set as 10Hz；Response master caused by wheel track excitation
It will be more than tens of Hertz, so needing to carry out high-pass filtering processing to vibratory response, it is preferable that lower frequency limit is set as 20Hz.
S2, using rigidity and damping as key mechanics parameter, respectively with corresponding horizontal translation, vertical translation and what is rotated subtracting
Vibration unit simulates three-dimensional vibration absorber, and then determines the mechanics parameter of achievable vibration damping target.
When vibration absorber is arranged between bridge and totally enclosed type sound barrier, company between the two is simulated with damper unit
It connects.The parameter of damper unit includes two classes of rigidity and damping, wherein horizontal translation, the vertical damper unit phase being translatable and rotate
It is mutually independent, therefore share 6 mechanics parameters.Preferably, the rigidity and damping for first determining vertical translation damper unit, only need to examine at this time
Consider the sound barrier vibration under wheel track incentive action.Then, in conjunction with the knot of the quiet component of train wind load and totally enclosed type sound barrier
Structure parameter determines the rigidity and damping of rotation damper unit.Finally, considering the dynamic effect of train wind loads, water is determined
The rigidity and damping of average dynamic damper unit.
S3, according to the mechanics parameter for the damper unit for realizing horizontal translation and rotation, to the quantity of the elastomer 43,
Away from, size, material parameter be designed；According to the mechanics parameter for realizing the damper unit being vertically translatable, to the shock-absorbing spring
34 and quantity, size, the material parameter of the damping agent 35 be designed.
Firstly, determining the planar dimension and minimum constructive height of vibration absorber according to the size of totally enclosed type sound barrier.Then,
It is right according to existing susceptor design method according to the mechanics parameter for realizing horizontal translation, the vertical damper unit for being translatable and rotating
Elastomer 43, shock-absorbing spring 34 and damping agent 35 are designed.Finally, steady to the intensity of vibration absorber each section and entirety respectively
It is qualitative to carry out inspection calculation.
S4, energy consuming components entirely ineffective extreme case is considered under the premise of extreme load, it is true by structural stress analysis
Determine sound barrier and do not occur the limit demand that globality collapses, and then obtains between the limit steel plate 14 and the lower riser 22
Gap, the height of the inner cylinder 33 and the outer cylinder 31 and gap, the size of the sliding groove 13, the rotating limit device
The size of 5 spacing and the upper end hole 55.
Under the entirely ineffective extreme case of energy consuming components, all parts of vibration absorber reach maximum displacement.This is become
Position is considered as the displacement boundary conditions of totally enclosed type sound barrier, establishes the finite element model of totally enclosed type sound barrier, whether checks it
Globality can occur because of intensity deficiency to collapse.When being likely to occur globality and collapsing, the limit that vibration absorber is gradually reduced becomes
Position determines the limit demand of vibration absorber with this until qualification.
Although being described in detail in conjunction with attached drawing to a specific embodiment of the invention, should not be construed as special to this
The restriction of the protection scope of benefit.In range described by claims, those skilled in the art are without creative work
The various modifications and deformation that can make still belong to the protection scope of this patent.
Claims (7)
1. the three-dimensional vibration absorber of totally enclosed type sound barrier on a kind of high metal bridge, which is characterized in that including upper component (1) and the following group
Part (2), right above the lower component (2), the upper component (1) includes upper plate (11), described for upper component (1) setting
Upper plate (11) both ends are provided with riser (12), and upper plate (11) bottom surface is provided with limit steel plate (14), the following group
Part (2) includes lower plate (21), and lower plate (21) two sides are provided with lower riser (22), the upper riser (12) and it is described under
It is provided between riser (22) two-way energy consuming components (4), the two-way energy consuming components (4) include fixation steel plate (41) and sliding steel
Plate (42), the fixation steel plate (41) and the sliding steel plate (42) be in H-type, and between be provided with several elastomers (43), institute
State be provided on riser (12) with the sliding steel plate (42) matched sliding groove (13), be provided on the lower riser (22)
With the fixation steel plate (41) matched fixing groove (23), it is provided between the upper plate (11) and the lower plate (21) perpendicular
To energy consuming components (3), the vertical energy consuming components (3) include outer cylinder (31) and inner cylinder (33), and the outer cylinder (31) sets
It sets on movable steel plate (32), is provided with tube plug (36) in the outer cylinder (31), the inner cylinder (33) is arranged under described
In annular groove (37) on bottom plate (21), and between the outer cylinder (31) and the tube plug (36), the inner cylinder
(33) it is provided in shock-absorbing spring (34), and is filled with damping agent (35), outer cylinder (31) diameter is greater than the inner cylinder
(33) diameter is provided with several rotating limit devices (5) between the upper plate (11) and the lower plate (21), the upper top
It is provided on plate (11) several fixing bolts (6), is provided with several fixation holes (8) on the lower plate (21).
2. the three-dimensional vibration absorber of totally enclosed type sound barrier on high metal bridge as described in claim 1, which is characterized in that described turn
Dynamic limiting device (5) include upper hinge (51) and lower hinge (52), and the upper hinge (51) and the lower hinge (52) are set respectively
It sets on the upper plate (11) and the lower plate (21), the upper hinge (51) and the lower hinge (52) are by matching
Connecting plate (53) and pin hinge (54) connection, be provided with upper end hole (55) on the connecting plate (53), the upper end hole (55) is long
Degree is greater than the pin and cuts with scissors (54) diameter.
3. the three-dimensional vibration absorber of totally enclosed type sound barrier on high metal bridge as described in claim 1, which is characterized in that the cunning
In dynamic slot (13), between the movable steel plate (32) and the limit steel plate (14), the outer cylinder (31) and the inner cylinder
(33) polytetrafluorethylecoatings coatings are provided between.
4. the three-dimensional vibration absorber of totally enclosed type sound barrier on high metal bridge as described in claim 1, which is characterized in that in described
Cylinder (33) top surface is provided with rubber ring (9).
5. the three-dimensional vibration absorber of totally enclosed type sound barrier on high metal bridge as described in claim 1, which is characterized in that the limit
Position steel plate (14) two sides are provided with rubber pad (7).
6. the three-dimensional vibration absorber of totally enclosed type sound barrier on high metal bridge as described in claim 1, which is characterized in that described to subtract
Vibrating device is mounted on the pre-buried U-shaped muscle of bridge flange plate by the fixation hole (8), and noise barrier stand column is fixed on the institute of the present apparatus
It states on fixing bolt (6).
7. the Vibration Absorption Designing method of any one of claim 1-6 described device, which comprises the steps of:
S1, according to train, the mechanics parameter of bridge and totally enclosed type sound barrier, pass through that vehicle bridge coupling vibration is theoretical and fluid structurecoupling
Theory obtains the totally enclosed type sound barrier magnitude of vibrations under train fluctuating wind and wheel track excitation synergy, and advises according to correlation
The requirement of model limit value, determines the vibration damping target of totally enclosed type sound barrier；
S2, key mechanics parameter is used as using rigidity and damping, respectively with corresponding horizontal translation, vertical translation and the vibration damping list rotated
Member simulates three-dimensional vibration absorber, and then determines the mechanics parameter of achievable vibration damping target；
S3, according to the mechanics parameter for the damper unit for realizing horizontal translation and rotation, to the quantity of the elastomer (43),
Away from, size, material parameter be designed；According to the mechanics parameter for realizing the damper unit being vertically translatable, to the shock-absorbing spring
(34) it is designed with quantity, size, the material parameter of the damping agent (35)；
S4, energy consuming components entirely ineffective extreme case is considered under the premise of extreme load, sound is determined by structural stress analysis
The limit demand that the globality that barrier do not occur collapses, and then obtain between the limit steel plate (14) and the lower riser (22)
Gap, the height of the inner cylinder (31) and the outer cylinder (33) and gap, the size of the sliding groove (13), the rotation limit
The spacing of position device (5) and the size of the upper end hole (55).
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| CN112324828A (en) * | 2020-11-24 | 2021-02-05 | 北京航空航天大学 | Three-way rigidity damping decoupling high-bearing metal rubber combined vibration isolator |
| CN113653195A (en) * | 2021-09-07 | 2021-11-16 | 株洲时代新材料科技股份有限公司 | Vertical vibration reduction support and vibration reduction method thereof |
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