CN205529712U - A device of making an uproar falls in damping for moderate -low speed magnetic levitation switch roof beam - Google Patents
A device of making an uproar falls in damping for moderate -low speed magnetic levitation switch roof beam Download PDFInfo
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- CN205529712U CN205529712U CN201620224237.2U CN201620224237U CN205529712U CN 205529712 U CN205529712 U CN 205529712U CN 201620224237 U CN201620224237 U CN 201620224237U CN 205529712 U CN205529712 U CN 205529712U
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Abstract
The utility model discloses a device of making an uproar falls in damping for moderate -low speed magnetic levitation switch roof beam, including setting up the embedded plate on the switch breast portion edge of a wing and installing a plurality of harmonious mass damper on this embedded plate, wherein, harmonious mass damper includes main vibration system, is provided with the container of built -in harmonious attenuator on it, fill in this container into there being the damping liquid, and through quality, rigidity and the damping coefficient parameter of adjusting harmonious damping machanism, and the adjustment the size of container and the degree of depth of internal damping liquid, make its satisfy respectively the quality harmonious with the harmonious condition of liquid, it is harmonious with liquid to reach the quality, and then realizes falling the damping of switch roof beam and make an uproar. The utility model discloses ensureing that it targets in place under the prerequisite at the specified time internal rotation to satisfy the switch roof beam, can reduce the vertical vibrational acceleration long -term stability of switch roof beam to 0.5g's the safe and comfortable standard in, realizing the control to the vibration of switch roof beam.
Description
Technical field
This utility model belongs to medium-and low-speed maglev technical field of rail traffic, is specifically related to a kind of medium-and low-speed maglev turnout junction girder vibration and noise reducing device.
Background technology
Track switch is for making rolling stock proceed to the line connection equipment of another station track from a station track in track traffic, and the most AT STATION, marshalling yard lays in a large number.The track switch of medium-and low-speed maglev track traffic has generally included turnout junction girder, buttress beam, chassis, beam upper rail, driving means, locking device, movable end guide rail, electric control system, when needs lane change, conversion command is received from track switch electric control system, railroad switch actuating device drives track switch active beam transverse shifting, drive driven beam to move along chassis, make turnout junction girder, guide rail turn to specify locking device locking after buttress beam alignment, and then realize lane change.
Magnetic-levitation train is when turnout passing, in order to the changing points time is short, turnout junction girder design is general uses lightness I-steel to add diaphragm structure, and this turnout junction girder natural frequency of vibration is at 10-18Hz, and each rank natural frequency of vibration difference is less, on the one hand the magnetic-levitation train natural frequency of vibration is close with the turnout junction girder natural frequency of vibration, produces resonance, and this resonance can affect switch structure service life, on the other hand vibrate excessive, affect floating operation stability and the comfortableness listed of magnetic, and produce noise, affect environment.Therefore, it is necessary to the resonance between magnetic-levitation train and track switch is processed, reduce and improve the covibration produced between track switch and magnetic-levitation train.
At present, solve in the industry resonance problem and change vibration characteristics mainly by changing track switch quality, in active beam steel box-girder, such as add suitable sand (cobblestone) bag (case) processing means, the program can improve vibration characteristics, but its effectiveness in vibration suppression and continue the aspect such as stability of vibration damping and still suffer from deficiency, is mainly reflected in following two aspect:
1) it is difficult to reach expection vibration damping target
Middle low speed turnout junction girder is designed with lightness I-steel and adds diaphragm structure, turnout junction girder weight is about 247KN, 11KW motor can be met and rotate in place in 15s, add sand (cobblestone) bag (case) at active beam two span centre and increase track switch quality change vibration characteristics, sand (cobblestone) bag (case) quality should not too greatly (no more than 4000kg), otherwise cannot meet time requirement in track switch rotates 15 seconds, and abrasive band (case) is although quality has certain effectiveness in vibration suppression in 4000kg, vertical motion acceleration can be reduced to about 1.0g to 1.3g by 3.3g, but it is difficult to reach vertical motion Acceleration Control in no more than 0.5g safety and comfort standard.
2) effectiveness in vibration suppression is unstable
Add sand (cobblestone) bag (case) at active beam two span centre and change vibration characteristics, after being run multiple times along with magnetic-levitation train, its effectiveness in vibration suppression worse and worse, when this is primarily due to just be open to traffic, sand (cobblestone) is loose, having certain damping action, along with train is run multiple times vibration, sand (cobblestone) becomes closely knit, its damping action is more and more less, final only mass action, effectiveness in vibration suppression worse and worse, its vibration damping poor stability.
Utility model content
Disadvantages described above or Improvement requirement for prior art, this utility model provides a kind of vibration and noise reducing device for medium-and low-speed maglev turnout junction girder, it organizes tuned mass damper by arranging in steel case turnout junction girder more, by the vibration of movable mass block in the vibrational energy transfer of turnout junction girder to tuned mass damper, guaranteeing that meeting turnout junction girder rotate in place under premise at the appointed time, turnout junction girder vertical motion acceleration can be reduced in the safety and comfort standard of 0.5g steadily in the long term, it is achieved the control to turnout junction girder vibration.
For achieving the above object, according to this utility model, it is provided that a kind of vibration and noise reducing device for medium-and low-speed maglev turnout junction girder, it is characterised in that this device includes:
It is arranged on the embedded board on turnout junction girder bottom flange；
The multiple tuned mass dampers being fixedly mounted on this embedded board；
Wherein, described tuned mass damper includes principal oscillation system, the container of built-in tuned damper it is provided with in this principal oscillation system, it has been filled with damping fluid in this container, quality by regulation tuning damping mechanism, rigidity and damped coefficient, and adjust size and the degree of depth of internal damping liquid thereof of described container, it is made to meet mass tuning and tunable liquid condition respectively, the vibrational energy making turnout junction girder in this way can be transferred to the vibration of movable mass block, and by the vibrational energy of damping fluid dissipation movable mass block, reach mass tuning and tunable liquid, and then realize the vibration and noise reducing to turnout junction girder.
As of the present utility model further preferably, described tuned mass damper is more than four groups.
As of the present utility model further preferably, each organize described tuned mass damper and be symmetrically distributed in turnout junction girder.
As of the present utility model further preferably, often organize described tuned mass damper and include three to six mass dampers, be transversely evenly arranged along turnout junction girder.
As of the present utility model further preferably, the damping ratio often organizing described tuned mass damper is 0.1, and frequency is preferably in the range of 16.56-17.56.
As of the present utility model further preferably, the quality often organizing described tuned mass damper is 45-55kg.
In this utility model, middle low speed turnout junction girder Tuned mass damper system (TMD, Tuned Mass Damper) it is the frequency by regulating self, in tuning range, by the vibration of movable mass block in the vibrational energy transfer of turnout junction girder to TMD, damping unit in TMD can the vibrational energy of abundant dissipation movable mass block, to reach to control the purpose of turnout junction girder vibration.
This utility model, by installing many group TMD tuned mass dampers in active beam, increases damping value, vibratory response can be greatly reduced.
In general, by the contemplated above technical scheme of this utility model compared with prior art, have the advantages that
(1) this utility model arranges in principal oscillation system damping mass block further, and mass is placed in damping fluid simultaneously, by frequency and the damping parameter of damping fluid of regulation mass so that mass is transported
Damping fluid motion is promoted time dynamic, i.e. by quality and liquid double tunning, utilize the coupling of fluid and solid, when substantially reducing vibration absorber volume simultaneously, the parameter adjustment not only making whole vibration absorber is convenient, and makes its effectiveness in vibration suppression more preferably；
(2), in this utility model, after installing antivibrator, track switch quality only increases 1200kg, meets 15s rotation time requirement, and turnout junction girder vertical motion acceleration is reduced in 0.5g safety and comfort standard, and vibration damping is steady in a long-term.
Accompanying drawing explanation
Fig. 1 is the principle schematic of vibration absorber of the present utility model；
Fig. 2 be in the vibration absorber according to one embodiment of this utility model TMD and 1 across the schematic diagram of active beam mounting structure；
Fig. 3 (a) is the facade structures schematic diagram that in the vibration absorber in Fig. 2, TMD and 1 installs across active beam；3 (b) is the planar structure schematic diagram that TMD and 1 installs across active beam；3 (c) is the side structure schematic diagram that TMD and 1 installs across active beam.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this utility model.As long as just can be mutually combined additionally, technical characteristic involved in each embodiment of this utility model disclosed below does not constitutes conflict each other.
According to one preferred embodiment of this utility model damping device structure as illustrated in fig. 1 and 2, the vibration absorber of this embodiment includes organizing tuned mass damper more, weld the embedded board of certain thickness (such as 24mm) on the I-steel bottom flange of turnout junction girder both sides, fix with embedded board with bolt bottom tuned mass damper.
In one embodiment, whole group of track switch active beam two across, be often preferably four groups across antivibrator, often group antivibrator preferably includes three antivibrators being arranged in juxtaposition, preferably along the laterally homogeneous layout of turnout junction girder.Certainly this practicality
In novel, the group number for antivibrator is not limited to this, can be selected by model analysis as the case may be.
Owing to TMD antivibrator is for the sensitivity of frequency, for the TMD of single frequency, controlled frequency range is narrower, and once beyond the frequency departure controllable frequency scope of main structure, controlling effect can have a greatly reduced quality.Float the vibration damping project of engineering turnout junction girder for magnetic for, turnout junction girder lighter weight, the frequency of turnout junction girder can be produced impact when train passes through, and many this influence degree differences that causes at least of passenger, therefore, the operation phase actual frequency of this turnout junction girder are not fixed, therefore take the mode of multiple tuning quality liquid double tunning antivibrator (TLMD) that it is carried out vibration control.
It practice, middle low speed turnout junction girder controls vibration has a following two feature: 1) controlled frequency is up to 18Hz.Turnout junction girder has the predominant oscillatory frequencies of car state to be 18Hz, and after this frequency Train leaves, track switch vibration of beam decay persistence time is the shortest, and therefore TMD major control has car state (i.e. controlled frequency is 18Hz)；2) idling frequency of turnout junction girder is with to have car frequency phase-difference very big, and has car frequency to change along with the mass change of car body.Therefore many class frequencys distributed MTMD antivibrator is used to carry out vibration control.
Antivibrator operation principle is shown in Fig. 1, it is M in quality, rigidity is K, and damped coefficient is in the principal oscillation system of C, arranges the container of a built-in tuned mass damper, in container, the quality of tuned mass damper is m, rigidity is k, and damped coefficient is c, regulates the parameters such as quality m of Tuned mass damper mechanism, rigidity k, damped coefficient c, it is made to meet mass tuning condition, to reach the effectiveness in vibration suppression of mass tuning.Meanwhile, in container, it is filled with damping fluid, by adjusting container dimensional and the degree of depth of internal damping liquid thereof so that it is meet tunable liquid condition, to reach the effectiveness in vibration suppression of tunable liquid.Owing to promoting damping fluid motion when mass m moves, make its wave amplitude bigger, it is more beneficial for it to absorb and the energy of the principal oscillation system that dissipates, i.e. by quality and liquid double tunning, utilize the coupling of fluid and solid simultaneously, when substantially reducing vibration absorber volume, the parameter adjustment not only making whole vibration absorber is convenient, and makes its effectiveness in vibration suppression more preferably.
In Fig. 1, antivibrator kinetics equation is:
In formula:
The quality coefficient of M, C, K main structure, damped coefficient and stiffness coefficient；The dynamic excitation that p (t) main structure is subject to；The displacement of y main structure；The quality coefficient of i-th TMD, damped coefficient and stiffness coefficient；The displacement of i-th TMD；I-th TMD and the displacement of main structure junction.
Above-mentioned vibrational system is carried out moda1 decomposition, obtains its modal equations:
In formula: qkMain structure kth component level is moved；γkThe TLMD relative displacement to structure kth order mode state；mk、ωk、ζk、FkThe modal mass on main structure kth rank, circular frequency, modal damping and mode external force；
The i-th TLMD vibration shape value to mass ratio, circular frequency, damping ratio and the installed position main structure of main structure kth order mode state.
Aiming at of multiple target satisfaction control theory, when mass ratio one timing of multiple TMD, the power augmentation multiple of main structure (turnout junction girder) and TMD all takes minima.
In one embodiment, by optimizing, the parameters optimization arranging four groups of TMD is as shown in the table.
Under this parameter, the power augmentation multiple maximum of active beam is 6.37.
After turnout junction girder is by installing TMD, vertical motion acceleration is reduced in 0.5g safety and comfort standard by 3.3g when not installing TMD, and can be steady in a long-term, and after installing antivibrator, track switch quality only increases 1200kg, meets 15s rotation time requirement.
It addition, damping fluid in antivibrator in addition to providing damping that is stable and that be easy to regulation to whole vibration absorber, each component returning vibration absorber provides anti-corrosion environment, extends whole vibration absorber service life, and reduces the integrated cost of full validity period.
Those skilled in the art is easy to understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, within should be included in protection domain of the present utility model.
Claims (6)
1. the vibration and noise reducing device for medium-and low-speed maglev turnout junction girder, it is characterised in that this device includes:
It is arranged on the embedded board on turnout junction girder bottom flange；
The multiple tuned mass dampers being fixedly mounted on this embedded board；
Wherein, described tuned mass damper includes principal oscillation system, and this principal oscillation system is provided with built-in tune
The container of humorous antivibrator, has been filled with damping fluid in this container, makes shaking of turnout junction girder by regulation tuning damping mechanism
Energy can be transferred to the vibration of movable mass block, and by the vibrational energy of damping fluid dissipation movable mass block,
Reach mass tuning and tunable liquid, and then realize the vibration and noise reducing to turnout junction girder.
Vibration and noise reducing device for medium-and low-speed maglev turnout junction girder the most according to claim 1, wherein, institute
Stating tuned mass damper is more than four groups.
Vibration and noise reducing device for medium-and low-speed maglev turnout junction girder the most according to claim 1, wherein, respectively
Organize described tuned mass damper to be symmetrically distributed in turnout junction girder.
Vibration and noise reducing device for medium-and low-speed maglev turnout junction girder the most according to claim 3, wherein, often
Organize described tuned mass damper and include three to six mass dampers, be transversely evenly arranged along turnout junction girder.
5. according to the vibration and noise reducing device for medium-and low-speed maglev turnout junction girder according to any one of claim 1-4,
Wherein, the damping ratio often organizing described tuned mass damper is 0.1, and frequency is in the range of 16.56-17.56.
6. according to the vibration and noise reducing device for medium-and low-speed maglev turnout junction girder according to any one of claim 1-4,
Wherein, the quality often organizing described tuned mass damper is 45-55kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620224237.2U CN205529712U (en) | 2016-03-22 | 2016-03-22 | A device of making an uproar falls in damping for moderate -low speed magnetic levitation switch roof beam |
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| CN201620224237.2U CN205529712U (en) | 2016-03-22 | 2016-03-22 | A device of making an uproar falls in damping for moderate -low speed magnetic levitation switch roof beam |
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| CN205529712U true CN205529712U (en) | 2016-08-31 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017162060A1 (en) * | 2016-03-22 | 2017-09-28 | 中铁第四勘察设计院集团有限公司 | Damping device and method for medium/low speed magnetic levitation turnout beam |
| CN107916599A (en) * | 2017-11-16 | 2018-04-17 | 中国铁建重工集团有限公司 | A kind of magnetic floats turnout junction girder |
| CN114875726A (en) * | 2022-04-11 | 2022-08-09 | 湖南九域同创高分子新材料有限责任公司 | Steel rail turnout vibration damping energy dissipation system |
-
2016
- 2016-03-22 CN CN201620224237.2U patent/CN205529712U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017162060A1 (en) * | 2016-03-22 | 2017-09-28 | 中铁第四勘察设计院集团有限公司 | Damping device and method for medium/low speed magnetic levitation turnout beam |
| CN107916599A (en) * | 2017-11-16 | 2018-04-17 | 中国铁建重工集团有限公司 | A kind of magnetic floats turnout junction girder |
| CN114875726A (en) * | 2022-04-11 | 2022-08-09 | 湖南九域同创高分子新材料有限责任公司 | Steel rail turnout vibration damping energy dissipation system |
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