CN104389247A - Dynamic vibration absorbing device applicable to F-track of medium-and-low-speed maglev train, and F-track structure - Google Patents

Dynamic vibration absorbing device applicable to F-track of medium-and-low-speed maglev train, and F-track structure Download PDF

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Publication number
CN104389247A
CN104389247A CN201410603618.7A CN201410603618A CN104389247A CN 104389247 A CN104389247 A CN 104389247A CN 201410603618 A CN201410603618 A CN 201410603618A CN 104389247 A CN104389247 A CN 104389247A
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CN
China
Prior art keywords
steel bar
track
rail
medium
low
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Application number
CN201410603618.7A
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Chinese (zh)
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CN104389247B (en
Inventor
马卫华
宗凌潇
罗世辉
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CHANGZHOU SOUTHWEST JIAOTONG UNIVERSITY JINLU RAILWAY TRANSPORTATION TECHNOLOGY DEVELOPMENT Co Ltd
Southwest Jiaotong University
Original Assignee
CHANGZHOU SOUTHWEST JIAOTONG UNIVERSITY JINLU RAILWAY TRANSPORTATION TECHNOLOGY DEVELOPMENT Co Ltd
Southwest Jiaotong University
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Application filed by CHANGZHOU SOUTHWEST JIAOTONG UNIVERSITY JINLU RAILWAY TRANSPORTATION TECHNOLOGY DEVELOPMENT Co Ltd, Southwest Jiaotong University filed Critical CHANGZHOU SOUTHWEST JIAOTONG UNIVERSITY JINLU RAILWAY TRANSPORTATION TECHNOLOGY DEVELOPMENT Co Ltd
Priority to CN201410603618.7A priority Critical patent/CN104389247B/en
Publication of CN104389247A publication Critical patent/CN104389247A/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B25/00—Tracks for special kinds of railways
    • E01B25/30—Tracks for magnetic suspension or levitation vehicles
    • 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

Abstract

The invention relates to the technical field of vibration and vibration control of the rail transit, in particular to a dynamic vibration absorbing device applicable to an F-track of a medium-and-low-speed maglev train, and an F-track structure. The dynamic vibration absorbing device comprises a connection seat and a steel bar, one end of the steel bar is fixed to the connection seat, the other end of the steel bar is a free end, a height difference exists between the steel bar and the installation surface of the connection seat, and a damping rubber material is pasted on the steel bar. The F-track structure comprises an F-track body and the dynamic vibration absorbing device, and the connection seat of the dynamic vibration absorbing device is fixed on the lower surface of a cantilever part of the F-track body. The dynamic vibration absorbing device applicable to the F-track of the medium-and-low-speed maglev train, and the F-track structure have the beneficial effects that the structure is simple and reliable, the assembly and the disassembly are convenient, the cost performance is excellent, the vibration and noise of the F-track generated during passing of the maglev train can be effectively reduced, the service life of the F-track can be prolonged, and the dynamic vibration absorbing device applicable to the F-track of the medium-and-low-speed maglev train, and the F-track structure have a broad prospect in actual engineering application.

Description

Be applicable to powered shock absorption device and the F rail structure of medium-and low-speed maglev car F rail
Technical field
The present invention relates to vibration and the vibration control technology field of track traffic, particularly a kind of powered shock absorption device and F rail structure being applicable to medium-and low-speed maglev car F rail.
Background technology
Relative to wheel-rail train and high-speed maglev train, medium-and low-speed maglev train has safety, quiet, green, economic four large distinguishing features.Its every kilometer cost and operating maintenance cost are all lower than subway and light rail.This illustrates that medium-and low-speed maglev has obvious advantage and wide prospect in urban track traffic.During current China has three medium-and low-speed maglev circuits building and plans.
Medium-and low-speed maglev train track used is its distinctive F shape rail (being also called F rail), and magnetic-levitation train produces suction suspend by installing electromagnet excitation ON TRAINS and below F rail and F rail.Suspending power is controlled by suspension control system, and the gap and train vertical acceleration that record electromagnet and F rail are fed back to suspension control system by the gap sensor in suspension control system, make it produce corresponding suspending power.Train is in suspension and traveling process, the size of suspending power is unstable, under making train and rail interaction, easily cause resonance, make track produce unnecessary vibration & noise, the consequence caused be affect vehicle safe operation, cause the fatigue of F rail to affect its life-span, produce the daily life of influence of noise pollution nearby residents.
In this case, suppress the vibration & noise of F rail to be extremely necessary, that can take mounting dampers reduces its vibration.But limited space on F rail, and track be frame on sleeper, general shock absorber cannot directly be installed, must adopt servicing unit.If every root F rail two ends, whole piece magnetic flotation line road all adopt shock absorber, huge quantity demand this way for single expensive shock absorber is obviously inappropriate.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of structure simple, good stability, be suitable for frequency domain wide, the powered shock absorption device being applicable to medium-and low-speed maglev car F rail that safety and life-span are long, solve medium-and low-speed maglev train F used rail and produce excessive vibration and noise problem.
The technical solution adopted for the present invention to solve the technical problems is: a kind of powered shock absorption device being applicable to medium-and low-speed maglev car F rail, comprise Connection Block and steel bar, one end and the Connection Block of steel bar are fixed, the other end of steel bar is free end, there is difference in height between steel bar and the installed surface of Connection Block, steel bar attaches damping rubber material.
The steel bar of this powered shock absorption device controls the intrinsic frequency of bump leveller by the change of size, when the intrinsic frequency of exciting force and bump leveller intrinsic frequency close to time, the amplitude of F rail can reduce greatly; The damping rubber material of this powered shock absorption device reaches optimum damped coefficient by the change of thickness, thus can absorb the exciting force under larger frequency bandwidth, reaches the effect of reducing vibration and noise.Compared to the prior art structure is simple, the vibration that can produce with lower cost reduction F rail and noise.
Further restriction, steel bar is fixed on Connection Block by steel bar seat, and steel bar and steel bar seat are structure as a whole.
Further restriction, steel bar seat and Connection Block are bolted.
Further restriction, damping rubber material attachment is at the tow sides of steel bar.
Further restriction, steel bar along its length thickness is even.
A kind of F rail structure, comprise F rail body and powered shock absorption device, the Connection Block of powered shock absorption device is fixed on the soffit of the bracketed part of F rail body.
Further restriction, Connection Block is fixed on the end of the soffit of the bracketed part of F rail body.
Further restriction, the bearing of trend of the steel bar of powered shock absorption device is consistent with the bearing of trend of F rail body.
Further restriction, the bracketed part of Connection Block and F rail body is welded to connect.
The invention has the beneficial effects as follows: simple and reliable for structure, be easy for installation and removal, cost performance is superior, and effectively can reduce F rail there being magnetic and float the vibration & noise of car through out-of-date generation, and can extend the F rail life-span, it has prospect widely in practical implementation.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described;
Fig. 1 is system vibration illustraton of model of the present invention;
Fig. 2 is that F rail is by the frequency width functional arrangement under exciting force;
Fig. 3 is the structural representation of F rail structure of the present invention;
Fig. 4 is the structural representation of powered shock absorption device of the present invention;
In figure, 2.F rail body, 3. bracketed part, 4. Connection Block, 5. steel bar, 6. damping rubber material, 7. steel bar seat, 8. bolt.
Detailed description of the invention
As shown in Figure 4, a kind of powered shock absorption device being applicable to medium-and low-speed maglev car F rail, comprise Connection Block 4 and steel bar 5, the end face of Connection Block 4 is installed surface, the bottom surface of Connection Block 4 is drilled with and is uniformly distributed bolt hole, one end of steel bar 5 has the steel bar seat 7 be structure as a whole with steel band 5, steel bar 5 is extended by the center of steel bar seat 7, and steel bar 5 along its length thickness is even, steel bar seat 7 is fixed by bolt 8 with Connection Block 4, the other end of steel bar 5 is free end, and the tow sides of steel bar 5 all attach the damping rubber material 6 identical with steel bar 5 area.
As shown in Figure 3, a kind of F rail structure, comprises the powered shock absorption device of F rail body 2 and said structure, and the Connection Block 4 of powered shock absorption device is fixed on the end of the soffit of the bracketed part 3 of F rail body 2.The bearing of trend of steel bar 5 is consistent with the bearing of trend of F rail body 2.Connection Block 4 is welded to connect with the bracketed part 3 of F rail body 2.
The shape of powered shock absorption device of the present invention is similar to semi girder, a simple spring-quality system can be regarded as, the size of steel bar 5 is regulated to change the intrinsic frequency of steel bar 5, significantly can reduce the amplitude of F rail when the driving frequency that the intrinsic frequency of steel bar 5 is subject to close to F rail body 2, the intrinsic frequency of whole Iarge-scale system to be coupled the driving frequency caused away from track.
At the double-edged damping rubber material 6 of steel bar 5, play the effect of damper, the thickness of damping adjusting elastomeric material 6 can change its damped coefficient, F rail body 2 its damped coefficient is adjusted to optimal value when can be made to be subject to the excitation of larger frequency range, amplitude is effectively suppressed, the damped elastomeric material 6 of vibration ability absorbed, and vibrates the noise caused and also decreases.
Steel bar 5 and damping rubber material 6 play respectively and adjust the rigidity of whole powered shock absorption device and the effect of damping, and its shape all can make corresponding adjustment and change according to the change of concrete service condition, makes whole bump leveller device reach the effect of vibration isolation noise abatement.
Operating principle of the present invention and process as follows:
Central low-speed maglev train is static or when running in orbit, because train and F rail body 2 can produce interactional suction, F rail body 2 can produce excessive vibration & noise due to this exciting force under certain frequency scope of magnetic-levitation train to it.When powered shock absorption device of the present invention has all been installed in the end of every root F rail body 2, powered shock absorption device can vibrate with F rail body 2.
As shown in Figure 1, F rail body 2 and powered shock absorption device can be regarded as the vibrational system of whole degree of freedom, set up following differential equation of motion:
Suppose that its form of separating is
x j(t)＝X je iωt，j＝1,2
The amplitude can obtaining steady state solution after substituting into two formulas is
X 1 = ( k 2 - m 2 ω 2 + ic 2 ω ) F 0 [ ( k 1 - m 1 ω 2 ) ( k 2 - m 2 ω 2 ) - m 2 k 2 ω 2 ] + iω c 2 ( k 1 - m 1 ω 2 - m 2 - ω 2 )
X 2 = X 1 ( k 2 + iω c 2 ) ( k 2 - m 2 ω 2 + iω c 2 )
Introduce following symbol:
μ=m 2/ m 1---mass ratio=absorber mass/mass of system
δ st=F 0/ k 1---the quiet distortion of system
---bump leveller intrinsic frequency square
---system frequency square
F=ω a/ ω n---natural frequency ratio
G=ω/ω n---driving frequency ratio
C c=2m 2ω n---critical damping coefficient
---damping ratio
X 1and X 2large I be expressed as
Two formulas show above, and the amplitude of F rail body 2 is μ mass ratioes, f natural frequency ratio, g driving frequency ratio, the function of ζ damping ratio.
As shown in Figure 2, can find by the frequency width functional arrangement under exciting force according to F rail body 2, if damping is zero, then resonance occurs in two undamped frequency places of system.If damping is infinitely great, be so in fact cemented on F rail by powered shock absorption device exactly, the essence of system is exactly added a part of quality.But when damping is 0.1, originally the peak value of two newly-increased resonance frequencies obtains good suppression, illustrates that the resonance containing steel bar 5 and damping rubber material 6 pairs of systems serves obvious inhibitory action.

Claims (9)

1. one kind is applicable to the powered shock absorption device of medium-and low-speed maglev car F rail, it is characterized in that: comprise Connection Block (4) and steel bar (5), one end of steel bar (5) and Connection Block (4) are fixed, the other end of steel bar (5) is free end, there is difference in height between the installed surface of steel bar (5) and Connection Block (4), steel bar (5) is upper attaches damping rubber material (6).
2. the powered shock absorption device being applicable to medium-and low-speed maglev car F rail according to claim 1, it is characterized in that: described steel bar (5) is fixed on Connection Block (4) by steel bar seat (7), steel bar (5) and steel bar seat (7) are structure as a whole.
3. the powered shock absorption device being applicable to medium-and low-speed maglev car F rail according to claim 2, is characterized in that: described steel bar seat (7) is fixed by bolt (8) with Connection Block (4).
4. the powered shock absorption device being applicable to medium-and low-speed maglev car F rail according to claim 1, is characterized in that: described damping rubber material (6) is attached to the tow sides of steel bar (5).
5. the powered shock absorption device being applicable to medium-and low-speed maglev car F rail according to claim 1, is characterized in that: thickness is even along its length for described steel bar (5).
6. a F rail structure, it is characterized in that: the powered shock absorption device comprising F rail body (2) and claim 1,2,3,4 or 5, the Connection Block (4) of described powered shock absorption device is fixed on the soffit of the bracketed part (3) of F rail body (2).
7. F rail structure according to claim 6, is characterized in that: described Connection Block (4) is fixed on the end of the soffit of the bracketed part (3) of F rail body (2).
8. F rail structure according to claim 6, is characterized in that: the bearing of trend of the steel bar (5) of described powered shock absorption device is consistent with the bearing of trend of F rail body (2).
9. F rail structure according to claim 6, is characterized in that: described Connection Block (4) is welded to connect with the bracketed part (3) of F rail body (2).
CN201410603618.7A 2014-10-31 2014-10-31 Be applicable to powered shock absorption device and the F rail structure of medium-and low-speed maglev car F rail Expired - Fee Related CN104389247B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105133444A (en) * 2015-09-11 2015-12-09 安徽兴宇轨道装备有限公司 Adjusting device for adjusting magnetic levitation rail
CN105133445A (en) * 2015-09-11 2015-12-09 安徽兴宇轨道装备有限公司 Rail plate locking seat of magnetic levitation rail
CN105839513A (en) * 2016-03-22 2016-08-10 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
CN106200319A (en) * 2015-05-28 2016-12-07 佳能株式会社 Imaging device
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
CN114922013A (en) * 2022-05-26 2022-08-19 中车青岛四方机车车辆股份有限公司 Power rail system

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WO2000015909A1 (en) * 1998-09-10 2000-03-23 Sedra Asphalt Technik Biebrich Gmbh Insulating sheath for gauge rods
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SE0202212L (en) * 2002-07-15 2004-01-16 Per Littorin Rälbullerdämpare
CN104005309A (en) * 2014-05-10 2014-08-27 青岛科而泰环境控制技术有限公司 Shearing type track damping noise reducing device
CN204199124U (en) * 2014-10-31 2015-03-11 西南交通大学 A kind of powered shock absorption device and F rail structure being applicable to medium-and low-speed maglev car F rail

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Publication number Priority date Publication date Assignee Title
JPH1046503A (en) * 1996-08-05 1998-02-17 H S S T Kaihatsu Kk Vibrationproofing rail support structure of magnetic floating travelling vehicle
WO2000015909A1 (en) * 1998-09-10 2000-03-23 Sedra Asphalt Technik Biebrich Gmbh Insulating sheath for gauge rods
SE0202212L (en) * 2002-07-15 2004-01-16 Per Littorin Rälbullerdämpare
KR20030044956A (en) * 2003-05-06 2003-06-09 김대인 Sound absorber made of a steel container of water being filled in, to be attached to rail.
CN104005309A (en) * 2014-05-10 2014-08-27 青岛科而泰环境控制技术有限公司 Shearing type track damping noise reducing device
CN204199124U (en) * 2014-10-31 2015-03-11 西南交通大学 A kind of powered shock absorption device and F rail structure being applicable to medium-and low-speed maglev car F rail

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106200319A (en) * 2015-05-28 2016-12-07 佳能株式会社 Imaging device
US10359718B2 (en) 2015-05-28 2019-07-23 Canon Kabushiki Kaisha Image forming apparatus
CN106200319B (en) * 2015-05-28 2020-06-30 佳能株式会社 Image forming apparatus with a plurality of image forming units
CN105133444A (en) * 2015-09-11 2015-12-09 安徽兴宇轨道装备有限公司 Adjusting device for adjusting magnetic levitation rail
CN105133445A (en) * 2015-09-11 2015-12-09 安徽兴宇轨道装备有限公司 Rail plate locking seat of magnetic levitation rail
CN105839513A (en) * 2016-03-22 2016-08-10 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
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
CN114922013A (en) * 2022-05-26 2022-08-19 中车青岛四方机车车辆股份有限公司 Power rail system

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