CN109374240A - A kind of test method of magnetic suspension rail Optimal Stiffness limit value - Google Patents
A kind of test method of magnetic suspension rail Optimal Stiffness limit value Download PDFInfo
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- CN109374240A CN109374240A CN201811191928.7A CN201811191928A CN109374240A CN 109374240 A CN109374240 A CN 109374240A CN 201811191928 A CN201811191928 A CN 201811191928A CN 109374240 A CN109374240 A CN 109374240A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0025—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings of elongated objects, e.g. pipes, masts, towers or railways
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0066—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by exciting or detecting vibration or acceleration
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- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Vehicle Body Suspensions (AREA)
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Abstract
A kind of test method of magnetic suspension rail Optimal Stiffness limit value provided by the invention, break through traditional idea, verifying rigidity is changed into measurement rigidity, so as to subsequent design work, it can effectively determine Optimal Stiffness limit value of the different automobile types under the different speeds of service, test accuracy is high in continuous mode, convenient for repeatedly adjusting rigidity step by step, adjustment is accurate, regulating gradient flexibility and changeability, also it can be suitably used for verifying link, precision is higher, verifying is abundant, the same hollow box body can be re-used in test of many times, reduce waste, energy conservation and environmental protection, reduce experimentation cost, there are when multispan hollow box body, can different rigidity be adjusted for different hollow box bodies simultaneously, primary test can obtain multi-group data, effectively improve test efficiency, reduce the work difficulty of field test, shorten the test period, it is final to reduce applying for magnetic suspended railway Work cost and operation cost are of great significance to the popularization and development of China's magnetic suspended railway.
Description
Technical field
The present invention relates to magnetic suspension rail technical field, in particular to a kind of magnetic suspension rail Optimal Stiffness limit value
Test method.
Background technique
Magnetic levitation track girder construction is the primary load bearing structure of magnetic floating traffic, and when track girder rigidity is big, riding comfort is good, but
Cost is high；Rigidity hour, riding comfort is poor, but can reduce cost, since track beam structure cost accounts for about total system cost
60%~80%, so the rigidity of track girder not only directly influences vehicle traveling comfort and the riding comfort of passenger,
Most costs on magnetic flotation line road are also determined, therefore reasonable rigidity Design value is to guarantee that engineering economy and operation are stable
It is crucial.The country has had a plurality of medium-and low-speed maglev route to put into effect at present, such as the Changsha airport Ci Fu line, Beijing S1 line,
Some standards and specifications are preliminarily formed.But for the rigidity limit value of track girder, domestic medium-and low-speed maglev specification continues to use Germany more
High-speed magnetic floating Criterion restriction, more stringent (country's specification is, not less than 1/4600, Japan is, not less than 1/1500, Germany is not
Also illustrate that this value is more conservative lower than 1/4000), and according to existing some actual measurement amounts of deflection, so that existing magnetic levitation track girder is made
Valence is higher, directly affects the popularization and application of magnetic floating traffic, cost is caused to waste.
Existing magnetic-levitation generallys use vehicle bridge coupling vibration software model and is analyzed in design, rear to assist
The measured data for carrying out test wire acquires verifying, but suspension control module model and physical presence in Vehicle-bridge Coupling Analysis
Distortion, theoretical not perfect, modeling varies with each individual therefore conclusion difference is larger, therefore its accuracy needs further to be verified, and
Since the design efforts would of test wire is heavy, some test wires also only account for being arranged two-three kinds in Local topography in design
The track girder of different-stiffness and different structure form, and track girder poor rigidity is anisotropic less, test value is inflexible, abundant, leads
It causes its verification the verifying results bad, and mainly verifies its safety, do not combine comfort and economy sufficiently, therefore there is no at present
Method determines the Optimal Stiffness limit value of suitable track girder of magnetic suspension vehicle in China's under the different speeds of service.
Summary of the invention
Technical problem to be solved by the present invention lies in the rigidity limit values of existing magnetic levitation track girder construction than more conservative, is setting
When counting rigidity mainly using verifying rather than measure, while verifying that link is insufficient, cause to lack suitable China's magnetic suspension vehicle
The Optimal Stiffness limit value of track girder, causes track girder cost higher, and the above-mentioned deficiency such as cost of idleness provides a kind of magnetic-levitation
The test method of beam Optimal Stiffness limit value.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
A kind of test method of magnetic suspension rail Optimal Stiffness limit value, includes the following steps:
A, sleeper is connected on all track girders, all track girders is lifted on bridge pier, are connected on the sleeper
It integrates with, at least one across for height-adjustable hollow box body in all track girders；
B, it selects vehicle and the speed of service to carry out magnetic-levitation train dynamic test, obtains the vehicle operation of the hollow box body section
Comfort index W；
C, at least one height across the hollow box body is adjusted；
D, step B and C are repeated, until determining the track girder Optimal Stiffness under the vehicle and the speed of service in 3 range of W ﹤；
Wherein, the hollow box body includes upper layer component and lower layer's component, and lower layer's component is removably attachable to institute
It states below the component of upper layer, the hollow box body is steel components.
Using a kind of test method of magnetic suspension rail Optimal Stiffness limit value of the present invention, in test wire at least
Across height-adjustable hollow box body, remaining can be the nonadjustable track girder of height across track girder, such as use concrete for setting one
Experimentation cost is effectively reduced in track girder, while mitigating the workload of Field adjustment, improves test efficiency, conducive to the water for ensureing track
Pingdu avoids measurement error, and the hollow box body is steel components, and the rigidity of hollow box body can be counted according to the following formula
Calculate: E=EI, wherein K is bending stiffness, and E is the elasticity modulus of the hollow box body steel, I=IOn+AOn×SOn 2, I is hollow
The whole inertia of cabinet is away from IOnFor the upper layer component around itself neutral axis inertia away from AOnIt is cut for the upper layer component itself
Face area, SOnFor the distance of the upper layer component away from hollow box body center line, therefore by adjusting upper layer component and/or lower layer's structure
The height of part, or the spacing between upper layer component and lower layer's component is adjusted, realize whole height (the i.e. upper layer of the hollow box body
Difference in height between member upper surface and lower layer's component lower surface) it is adjustable, so that the rigidity of the hollow box body is made to change, it will
All track girders after the installation is completed, select vehicle and the speed of service to be tested, obtain the vehicle of the hollow box body section
Then running comfort index W adjusts the rigidity of the hollow box body step by step, that is, adjusts the height of the hollow box body, and leads to
Cross that adjustment pier is high or height of support make the orbit altitude of hollow box body adjusted with it is adjacent across orbit altitude it is consistent, then weigh
Acquisition measurement data is tested in retrial, usual W ﹤ 2.50 be it is excellent, 2.50 ﹤ W ﹤ 2.75 are good, and 2.75 ﹤ W ﹤ 3.00 are qualification, by institute
Comfort index is not only directly affected with the rigidity of track girder, also determines most costs on magnetic flotation line road, it is comfortable to meet
Property, the Optimal Stiffness under the vehicle and the speed of service of the hollow box body is determined in the range of W ﹤ 3.00, is also determined that
The Optimal Stiffness limit value of track girder under the vehicle and the speed of service, so that subsequent projects are designed, using we
Method breaks through traditional idea, and verifying rigidity is changed into measurement rigidity, can effectively determine different automobile types under the different speeds of service
Optimal Stiffness limit value, so as to guide subsequent design, test accuracy is high in continuous mode, convenient for multiple adjustment rigidity step by step, adjusts
Whole accurate, regulating gradient flexibility and changeability also can be suitably used for verifying link, and precision is higher, and verifying is abundant, the same hollow box body energy
It being enough re-used in test of many times, reduces waste, energy conservation and environmental protection reduces experimentation cost, there are when multispan hollow box body, Neng Goutong
When different rigidity is adjusted for different hollow box bodies, primary test can obtain multi-group data, effectively improve test efficiency,
The work difficulty of field test is reduced, the test period is shortened, the final construction cost and operation cost for reducing magnetic suspended railway is right
The popularization and development of China's magnetic suspended railway are of great significance.
Further, the upper layer component includes top plate and two webs one, and lower layer's component includes bottom plate and two
Web two, each web one and web two are aligned, and the web one and web two are connect with several respectively
Plate is bolted, and has gap between the web one and corresponding web two, the size in the gap is by changing institute
The position that connecting plate and the corresponding web one and web two are connected is stated to be adjusted.
Further, the upper and lower ends of each connecting plate are equipped with several row's screw holes.
It also is provided with screw hole on the web one and web two, by adjusting the spiral shell on the web one and/or web two
The link position between screw hole on hole and each connecting plate adjusts the height of cabinet, and all connecting plates are steel
Plate, screwhole position machining accuracy is high, convenient for accurate control height.
Further, the step C is comprised the following steps:
C1, upper layer component and lower layer's component are disconnected, adjusts the height in the gap；
C2, the connection upper layer component and lower layer's component；
C3, the hollow box body is installed into go back to original position.
Further, the height in the step C3 also comprising the support under the corresponding hollow box body of adjustment.
Further, the support under all hollow box bodies is adjustable height support.
The adjustable height support is hydraulic heightening support or spiral height-adjustable supports, due to other height and positions across track girder
It is constant, and the oneself height of the hollow box body changes, and is made by hydraulic or threaded engagement hollow after Level Change
The position of cabinet is concordant with other track girders, i.e., the upper surface of all track girders flushes, and Adjustment precision is good, and flexibility is good,
To guarantee track level, going on smoothly for test is effectively ensured, guarantees the height of whole route, effectively improves the accurate of test
Degree guarantees the optimality of rigidity limit value, to reduce route cost when practice of construction.
Further, ribbed stiffener is equipped in the upper layer component and lower layer's component.
Further, the hollow box body along indulge bridge to two ends on there are also several stiffeners, it is each described plus
The bottom surface of strength plate is connected on the bottom plate, and a side of each stiffener is connected on the web two.
Further, the calculation formula of the vehicle running comfort index in the step B are as follows:
Wherein: A is Vehicular vibration acceleration, and f is the single order vibration frequency of the hollow box body, and F (f) is frequency correction factor.
Further, the upper layer component of each hollow box body and size, the material of lower layer's component are all the same.
Compared with prior art, beneficial effects of the present invention: the present invention breaks through traditional idea, and verifying rigidity is changed into survey
Determine rigidity, can effectively determine Optimal Stiffness limit value of the different automobile types under the different speeds of service, test accuracy in continuous mode
Height, convenient for multiple adjustment rigidity step by step, adjustment is accurate, regulating gradient flexibility and changeability, also can be suitably used for verifying link, precision compared with
Height, sufficiently, the same hollow box body can be re-used in test of many times for verifying, reduce waste, energy conservation and environmental protection, reduce test at
This can adjust different rigidity for different hollow box bodies simultaneously there are when multispan hollow box body, and primary test can obtain
Multi-group data is obtained, test efficiency is effectively improved, reduces the work difficulty of field test, shortens the test period, finally reduces magnetcisuspension
The construction cost and operation cost of floating railway, are of great significance to the popularization and development of China's magnetic suspended railway.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the magnetic suspension test wire in the present invention；
Fig. 2 is the structural schematic diagram of the magnetic suspension test wire adjusted of the hollow box body in Fig. 1.
Marked in the figure: 1- sleeper, the upper layer 2- component, 21- top plate, 22- web one, 3- lower layer component, 31- bottom plate, 32- abdomen
Plate two, 4- connecting plate, 5- ribbed stiffener, 6- stiffener, 7- bridge pier, 8- support, the gap 9-.
Specific embodiment
Below with reference to embodiment and specific embodiment, the present invention is described in further detail.But this should not be understood
It is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodiments
The range of invention.
Embodiment 1
A kind of test method of magnetic suspension rail Optimal Stiffness limit value, includes the following steps:
A, sleeper 1 is connected on all track girders, all track girders is lifted on bridge pier 7, on the sleeper 1
Track is connected, at least one across for height-adjustable hollow box body in all track girders；
B, it selects vehicle and the speed of service to carry out magnetic-levitation train dynamic test, obtains the vehicle operation of the hollow box body section
Comfort index W；
C, at least one height across the hollow box body is adjusted；
D, step B and C are repeated, until determining the track girder Optimal Stiffness under the vehicle and the speed of service in 3 range of W ﹤；
Wherein, the hollow box body includes upper layer component 2 and lower layer's component 3, the upper layer component 2 of each hollow box body
All the same with size, the material of lower layer component 3, lower layer's component 3 is removably attachable to 2 lower section of upper layer component, institute
Stating hollow box body is steel components.
Set up test wire first, sleeper 1 connected on all track girders, have in all track girders one across for height it is adjustable
Hollow box body constitute, be conducive to improve test efficiency, mitigate field adjustable intensity, be conducive to control track levelness, institute
Stating hollow box body is steel components, and the hollow box body includes upper layer component 2 and lower layer's component 3, and the upper layer component 2 includes top
Plate 21 and two webs 1, lower layer's component 3 include bottom plate 31 and two webs 2 32, the upper layer component 2 and lower layer
Be equipped with ribbed stiffener 5 in component 3, the hollow box body along indulge bridge to two ends on there are also several stiffeners 6, Mei Gesuo
The bottom surface for stating stiffener 6 is welded to connect on the bottom plate 31, and a side of each stiffener 6 is welded to connect in described
On web 2 32, first the upper layer component 2 is carried out being spliced to form the hollow box body with lower layer's component 3, then on described
Sleeper is connected on layer component 2 and other track girders, and when splicing, each web 1 was aligned with a web 2 32, institute
It states web 1 and web 2 32 to be bolted with several connecting plates 4 respectively, the upper and lower ends of each connecting plate 4
Several row's screw holes are equipped with, there is gap 9 between the web 1 and corresponding web 2 32, the size in the gap 9 is logical
It crosses and changes position that the connecting plate 4 and the corresponding web 1 and web 2 32 are connected to be adjusted, according to for the first time
The rigidimeter for needing to test calculates the size in the gap 9, after connection, by the hollow box body and other all described rails
Road beam is mounted on bridge pier 7, and the support 8 under the hollow box body is adjustable height support, as hydraulic heightening support or spiral are turned up
Support, as shown in Figure 1.
Then the attachment rail on all sleepers 1, after the track installation, select vehicle and the speed of service into
Row magnetic-levitation train dynamic test, obtaining Vehicular vibration acceleration A by acceleration transducer, (vertical Acceleration Control index is
aVertically≤0.25g；Transverse acceleration Con trolling index is aLaterally≤ 0.20g), then according to formula:It asks
Obtain the vehicle running comfort index W of the hollow box body section, wherein f is the single order vibration frequency of the hollow box body, is calculated
Formula isK is the rigidity of hollow box body in formula, and m is the quality of hollow box body；F (f) is frequency correction factor, root
Correction factor is determined according to the value of f, if comfort index meets W requirement, i.e. W ﹤ 3.00 then continues to adjust the hollow box body
Rigidity is tested, that is, adjusts the size in the gap 9, and the step is first to disconnect upper layer component 2 and lower layer's component 3, root
According to the size it needs to be determined that the gap 9 is tested, after then connecting the upper layer component 2 and lower layer's component 3, according to height difference
The height for adjusting the support 8, then lifts the hollow box body again, makes the upper orbit altitude of adjusted hollow box body
It is consistent with adjacent orbit altitude, height difference is compensated using the support 8, as shown in Fig. 2, the adjusting at scene is effectively reduced
Workload improves test efficiency, and position and other rails of the hollow box body after Level Change are made by hydraulic or threaded engagement
Road Liangping is neat, and Adjustment precision is high, and flexibility is good, and going on smoothly for test is effectively ensured, and help to obtain optimal rigidity limit value,
To reduce practice of construction cost.
The height for repeating test and the hollow box body adjusts, true in the range of W ﹤ 3 in conjunction with actual building cost cost
Track girder Optimal Stiffness under the fixed vehicle and the speed of service, due to be according to specification W ﹤ 2.50 it is excellent, 2.50 ﹤ W ﹤ 2.75 are good
Good, 2.75 ﹤ W ﹤ 3.00 are qualification, therefore according to actual needs, thus it is possible to vary the limitation range of W determines different automobile types and operation
The Optimal Stiffness limit value for the track girder for being suitable under speed.
In test different rigidity is respectively adopted in settable 2-3 hollow box body in the track girder, primary to test
In test a variety of rigidity simultaneously, advantageously reduce test number (TN), reduce cost, while being convenient for comparative test index, to determine
More reasonable Optimal Stiffness limitation.
It is above-described, only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, appoints
What those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, answer
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be with the scope of protection of the claims
Subject to.
Claims (10)
1. a kind of test method of magnetic suspension rail Optimal Stiffness limit value, which comprises the steps of:
A, sleeper (1) is connected on all track girders, all track girders is lifted on bridge pier (7), in the sleeper (1)
Upper connection track, at least one across for height-adjustable hollow box body in all track girders；
B, vehicle and the speed of service is selected to carry out magnetic-levitation train dynamic test, the vehicle operation for obtaining the hollow box body section is comfortable
Property index W；
C, at least one height across the hollow box body is adjusted；
D, step B and C are repeated, until determining the track girder Optimal Stiffness under the vehicle and the speed of service in 3 range of W ﹤；
Wherein, the hollow box body includes upper layer component (2) and lower layer's component (3), and lower layer's component (3) is detachably connected
Below the upper layer component (2), the hollow box body is steel components.
2. a kind of test method of magnetic suspension rail Optimal Stiffness limit value as described in claim 1, which is characterized in that described
Upper layer component (2) includes top plate (21) and two webs one (22), and lower layer's component (3) includes bottom plate (31) and two webs
Two (32), each web one (22) are aligned with a web two (32), the web one (22) and web two (32)
It is bolted respectively with several connecting plates (4), between having between the web one (22) and corresponding web two (32)
Gap (9), the size of the gap (9) is by changing the connecting plate (4) and the corresponding web one (22) and web two (32)
The position that is connected is adjusted.
3. a kind of test method of magnetic suspension rail Optimal Stiffness limit value as claimed in claim 2, which is characterized in that each
The upper and lower ends of the connecting plate (4) are equipped with several row's screw holes.
4. a kind of test method of magnetic suspension rail Optimal Stiffness limit value as claimed in claim 2, which is characterized in that described
Step C is comprised the following steps:
C1, upper layer component (2) and lower layer's component (3) are disconnected, adjusts the height of the gap (9)；
C2, the connection upper layer component (2) and lower layer's component (3)；
C3, the hollow box body is installed into go back to original position.
5. a kind of test method of magnetic suspension rail Optimal Stiffness limit value as claimed in claim 4, which is characterized in that described
Height in step C3 also comprising the support (8) under the corresponding hollow box body of adjustment.
6. a kind of test method of magnetic suspension rail Optimal Stiffness limit value as claimed in claim 5, which is characterized in that all
The support (8) under the hollow box body is adjustable height support.
7. a kind of test method of magnetic suspension rail Optimal Stiffness limit value as described in claim 1-6 is any, feature exist
In being equipped with ribbed stiffener (5) in, the upper layer component (2) and lower layer's component (3).
8. a kind of test method of magnetic suspension rail Optimal Stiffness limit value as described in claim 1-6 is any, feature exist
In, the hollow box body along indulge bridge to two ends on there are also several stiffeners (6), the bottoms of each stiffener (6)
Face is connected on the bottom plate (31), and a side of each stiffener (6) is connected on the web two (32).
9. a kind of test method of magnetic suspension rail Optimal Stiffness limit value as described in claim 1-6 is any, feature exist,
The calculation formula of vehicle running comfort index in the step B are as follows:
Wherein: A is Vehicular vibration acceleration, and f is the single order vibration frequency of the hollow box body, and F (f) is frequency correction factor.
10. a kind of test method of magnetic suspension rail Optimal Stiffness limit value as described in claim 1-6 is any, feature exist
In the upper layer component (2) of each hollow box body and size, the material of lower layer's component (3) are all the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811191928.7A CN109374240B (en) | 2018-10-12 | 2018-10-12 | Method for testing optimal rigidity limit value of magnetic suspension track beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811191928.7A CN109374240B (en) | 2018-10-12 | 2018-10-12 | Method for testing optimal rigidity limit value of magnetic suspension track beam |
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| CN109374240A true CN109374240A (en) | 2019-02-22 |
| CN109374240B CN109374240B (en) | 2020-06-02 |
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| CN101216376A (en) * | 2008-01-16 | 2008-07-09 | 吉林大学 | Four-column type rail vehicle bogie rigidity detection system |
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2018
- 2018-10-12 CN CN201811191928.7A patent/CN109374240B/en active Active
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|---|---|---|---|---|
| US7478598B2 (en) * | 2005-12-09 | 2009-01-20 | Lawrence Livermore National Security, Llc | Oscillation damping means for magnetically levitated systems |
| CN101216376A (en) * | 2008-01-16 | 2008-07-09 | 吉林大学 | Four-column type rail vehicle bogie rigidity detection system |
| KR20150085881A (en) * | 2014-01-17 | 2015-07-27 | 유준호 | Maglev train science instructional teaching aid |
| CN107201715A (en) * | 2017-06-30 | 2017-09-26 | 中铁二院工程集团有限责任公司 | The lateral stiffness control method and bridge of high-block bridge concrete continuous girder bridge |
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