CN103674598B - The track structure fatigue test method and device of simulation traveling load - Google Patents
The track structure fatigue test method and device of simulation traveling load Download PDFInfo
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- CN103674598B CN103674598B CN201310698750.6A CN201310698750A CN103674598B CN 103674598 B CN103674598 B CN 103674598B CN 201310698750 A CN201310698750 A CN 201310698750A CN 103674598 B CN103674598 B CN 103674598B
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Abstract
The present invention relates to simulate the track structure fatigue test method and device of traveling load.This test method includes: on track structure to be tested, the moving direction along load is sequentially placed multiple stage MTS；All MTS load according to following loading environment: the maximum of load force is Fmax, the minimum of load force is Fmin；Loading frequency is ω；A length of T during loading；With the moving direction of load as front, every MTS and the phase contrast between the MTS that front is adjacent are θ；The computing formula that θ employing is following:S is: with the moving direction of load as front, every MTS and the distance between the MTS that front is adjacent；ν is: be modeled the translational speed of load；After loading, the fatigue damage of track structure to be tested is observed.The present invention closer to practical situation to the simulation of traveling load, reflects load force, loads number of times, moving direction and the translational speed size fatigue damage to track structure.
Description
Technical field
The present invention relates to the fatigue test field of track, in particular to the mobile lotus of simulation
The track structure fatigue test method and device carried.
Background technology
In correlation technique, the track structure fatigue test method of simulation traveling load can only be studied
Number of loading and the load fatigue damage to track structure, concrete test method is:
Apply a certain size load at sensitive position with certain loading frequency, be repeated enough
The load action of number of times (such as 2,000,000 times), investigates track structure or track component with this
Fatigue damage.Such test cannot reflect moving direction and the translational speed size tracking of load
The fatigue damage of road structure.
Summary of the invention
It is an object of the invention to provide the track structure fatigue test method of simulation traveling load
And device, to solve above-mentioned problem.
Provide a kind of track structure fatigue simulating traveling load in an embodiment of the present invention
Test method, comprises the following steps:
On track structure to be tested, the moving direction along load is sequentially placed the survey of multiple stage mechanics
Examination and simulator；
Track to be tested is tied according to following loading environment by all mechanical tests with simulator
Structure loads: the maximum of load force is Fmax, the minimum of load force is Fmin；Add
Carrier frequency rate is ω；A length of T during loading；With the moving direction of load as front, every mechanics
Test and simulator and the phase between mechanical test and the simulator that front is adjacent
Potential difference is θ；
Wherein, the computing formula that θ employing is following:
S is: with the moving direction of load as front, every mechanical test and simulator with
Distance between mechanical test and the simulator that front is adjacent；ν is: be modeled
The translational speed of load；
After loading, the fatigue damage of track structure to be tested is observed.
Further, track structure is: slab track track plates is formed with cement asphalt mortar
Layer structure, or the layer structure that slab track track plates and self-compacting concrete are formed.
Further, track structure is: slab track bedplate is formed with cement asphalt mortar
Layer structure, or the layer structure that slab track bedplate and self-compacting concrete are formed.
Further, track structure is: the road bed board of bi-block track is formed with supporting course
Composite construction.
Further, track structure is: the layer structure that buried sleeper is formed with road bed board.
Further, track structure is: the stratiform knot that highway concrete road surface and basic unit are formed
Structure.
Further, track structure is ballastless track structure.
Provide a kind of track structure fatigue simulating traveling load in an embodiment of the present invention
Assay device, including: on track structure to be tested, the moving direction along load divides successively
The multiple stage mechanical test of cloth and simulator；
Mechanical test is used for simulator: according to following loading environment to track to be tested
Structure loads: the maximum of load force is Fmax, the minimum of load force is Fmin；
Loading frequency is ω；A length of T during loading；With the moving direction of load as front, every power
Learn test and simulator and between mechanical test and the simulator that front is adjacent
Phase contrast is θ；
Wherein, the computing formula that θ employing is following:
S is: with the moving direction of load as front, every mechanical test and simulator with
Distance between mechanical test and the simulator that front is adjacent；ν is: be modeled
The translational speed of load.
The track structure fatigue test method of the simulation traveling load of the above embodiment of the present invention is not
Only can study load force F；Loading frequency ω, loading number of times are to track structure fatigue damage
Impact, but also can study translational speed ν and moving direction to track structural fatigue damage
The impact of wound.Wherein, load number of times and jointly realize with loading frequency by loading duration,
I.e. 0.5 ω * T/ π.And moving direction is by multiple stage mechanical test and simulator (MTS)
Between phase difference θ positive and negative realize, translational speed is the θ size by phase contrast
Realize, pass through formulaCan be by mutual to θ Yu s, ν inversion of phases.
As can be seen here, the test method of the present invention is to the simulation of traveling load more comprehensively, more connect
Nearly practical situation, reflects load force, loads number of times, moving direction and translational speed size
Fatigue damage to track structure.
Accompanying drawing explanation
Fig. 1 is showing of the composite construction fatigue experimental device of two MTS simulation traveling loads
It is intended to；
Fig. 2 shows the loading curve of two MTS in embodiments of the invention.
Detailed description of the invention
Below by specific embodiment and combine accompanying drawing and the present invention is done further in detail
Describe.
Embodiment one
A kind of track structure fatigue test method simulating traveling load, comprises the following steps:
On track structure to be tested, the moving direction along load is sequentially placed the survey of multiple stage mechanics
Examination and simulator (MTS)；
Track to be tested is tied according to following loading environment by all mechanical tests with simulator
Structure loads: the maximum of load force is Fmax, the minimum of load force is Fmin；Add
Carrier frequency rate is ω；A length of T during loading；With the moving direction of load as front, every mechanics
Test and simulator and the phase between mechanical test and the simulator that front is adjacent
Potential difference is θ；
Wherein, the computing formula that θ employing is following:
S is: with the moving direction of load as front, every mechanical test and simulator with
Distance between mechanical test and the simulator that front is adjacent；ν is: be modeled
The translational speed of load.
After loading, the fatigue damage of track structure to be tested is observed.
In above-mentioned test method, keep the loading frequency ω of every MTS, load force very big
Value FmaxWith minimum FminUnanimously.
The track structure fatigue test method more than simulating traveling load is possible not only to study load
Power F；Loading frequency ω, the loading number of times impact on track structure fatigue damage, but also
The impact on track structure fatigue damage of translational speed ν and moving direction can be studied.Wherein,
Load number of times and jointly realize with loading frequency by loading duration, i.e. 0.5 ω * T/ π.And
Moving direction is by the phase difference θ between multiple stage mechanical test and simulator (MTS)
Positive and negative realize, translational speed is that the θ size by phase contrast realizes, pass through
FormulaCan be by mutual to θ Yu s, ν inversion of phases.
As can be seen here, the test method of this enforcement is to the simulation of traveling load more comprehensively, more
Add close to practical situation.Be comprehensively investigation factor many (at least include five factor: F, ω,
ν, loading number of times, moving direction)；Being more nearly practical situation is to be: the quantity of MTS
The most, the track length that can simulate is longer；The density of the MTS in investigating distance is the biggest,
The most about close to the continuous load in reality, (the most each site has load on track structure
Load), the traveling load now simulated is the most just closer to practical situation.
Additionally, the test method of above-described embodiment can be used for studying multiple track structure, such as
The stratiform that slab track track plates is formed with cement pitch (CA) mortar or self-compacting concrete
Structure (study its gap damage), or slab track bedplate and cement asphalt mortar or from
The layer structure (studying the damage of its gap) that air-free concrete is formed, or bi-block track
The composite construction (studying the damage of its gap) that road bed board is formed with supporting course, or embedded type rail
The layer structure (studying its crack damage) that pillow is formed with road bed board, or highway concrete road
The layer structure (studying the damage of its gap) that face is formed with basic unit, or ballastless track structure.
Certainly, the range of application of the test method of the present embodiment is not limited to above structure.
For explaining in detail the loading procedure of MTS in above-mentioned test method, the present invention also provides for
MTS is loading curve when two and test method, and the charger of two MTS is such as
Shown in Fig. 1, including track structure 3, load force is F1Mechanical test and simulator 1,
It is F with load force2Mechanical test and simulator 2, the S in Fig. 1 is two MTS
Between distance.The loading curve of two MTS is as in figure 2 it is shown, the function of two curves
For:
Wherein F1T () is the load force that the 1st MTS loads when time t；F2(t)
It is the fatigue load power that loads when time t of the 2nd MTS；A is tired amplitude, and B is
Averagely load amplitude；B+A/2 constitutes the ceiling value of fatigue loading；B-A/2 constitutes fatigue and adds
The low limit value carried；For Initial phase, it can be arbitrary value.
Embodiment two
The track structure fatigue experimental device of simulation traveling load, including: at rail to be tested
Multiple stage MTS being sequentially distributed along the moving direction of load in road structure；
MTS is used for: load track structure to be tested according to following loading environment:
The maximum of load force is Fmax, the minimum of load force is Fmin；Loading frequency is ω；
A length of T during loading；Keep the loading frequency ω of every MTS, maximum FmaxAnd minimum
FminUnanimously, with the moving direction of load as front, every MTS is adjacent with in front
MTS between phase contrast be θ；
Wherein, the computing formula that θ employing is following:
S is: with the moving direction of load as front, every MTS is adjacent with in front
MTS between distance；ν is: be modeled the translational speed of load.
Identical with the description above for embodiment one, the simulation traveling load of the present embodiment
Track structure fatigue experimental device can also reach all technique effects above.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention,
For a person skilled in the art, the present invention can have various modifications and variations.All
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made,
Should be included within the scope of the present invention.
Claims (8)
1. simulate the track structure fatigue test method of traveling load, it is characterised in that under including
Row step:
On track structure to be tested, the moving direction along load is sequentially placed multiple stage
Mechanical test and simulator；
All described mechanical tests with simulator according to following loading environment to described
Track structure to be tested loads: the maximum of load force is Fmax, load force
Minimum be Fmin；Loading frequency is ω；A length of T during loading；Shifting with load
Dynamic direction is front, every described mechanical test and simulator with in front and its phase
The adjacent phase contrast between described mechanical test and simulator is θ；
Wherein, the computing formula that described θ employing is following:
S is: with the moving direction of load as front, every described mechanical test and mould
Propose standby and between described mechanical test and the simulator that front is adjacent
Distance；ν is: be modeled the translational speed of load；
After described loading, observe the tired damage of described track structure to be tested
Wound；
Wherein, load number of times and jointly realize with loading frequency by loading duration,
I.e. 0.5 ω * T/ π.
The track structure fatigue test side of simulation traveling load the most according to claim 1
Method, it is characterised in that described track structure is: slab track track plates drips with cement
The layer structure that blue or green mortar is formed, or slab track track plates and self-compacting concrete shape
The layer structure become.
The track structure fatigue test side of simulation traveling load the most according to claim 1
Method, it is characterised in that described track structure is: slab track bedplate drips with cement
The layer structure that blue or green mortar is formed, or slab track bedplate and self-compacting concrete shape
The layer structure become.
The track structure fatigue test side of simulation traveling load the most according to claim 1
Method, it is characterised in that described track structure is: the road bed board of bi-block track with
Hold the composite construction that layer is formed.
The track structure fatigue test side of simulation traveling load the most according to claim 1
Method, it is characterised in that described track structure is: buried sleeper is formed with road bed board
Layer structure.
The track structure fatigue test side of simulation traveling load the most according to claim 1
Method, it is characterised in that described track structure is: highway concrete road surface and basic unit's shape
The layer structure become.
The track structure fatigue test side of simulation traveling load the most according to claim 1
Method, it is characterised in that described track structure is ballastless track structure.
8. simulate the track structure fatigue experimental device of traveling load, it is characterised in that including:
The multiple stage power being sequentially distributed along the moving direction of load on track structure to be tested
Learn test and simulator；
Described mechanical test is used for simulator: according to following loading environment to described
Track structure to be tested loads: the maximum of load force is Fmax, load force
Minimum be Fmin；Loading frequency is ω；A length of T during loading；Shifting with load
Dynamic direction is front, every described mechanical test and simulator with in front and its phase
The adjacent phase contrast between described mechanical test and simulator is θ；
Wherein, the computing formula that described θ employing is following:
S is: with the moving direction of load as front, every described mechanical test and mould
Propose standby and between described mechanical test and the simulator that front is adjacent
Distance；ν is: be modeled the translational speed of load；
Wherein, load number of times and jointly realize with loading frequency by loading duration,
I.e. 0.5 ω * T/ π.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104062134B (en) * | 2014-06-19 | 2017-06-13 | 西南交通大学 | Simulate the fatigue test of structure method of reciprocating rolling load |
| CN104142381B (en) * | 2014-06-25 | 2016-08-17 | 西南交通大学 | A kind of detection method of ballastless track structure interlayer trauma |
| CN104298870B (en) * | 2014-10-08 | 2018-01-26 | 华中科技大学 | Simply supported beam damage and locomotivity recognition methods simultaneously under a kind of traveling load |
| CN109030049A (en) * | 2018-07-16 | 2018-12-18 | 北京交通大学 | A kind of ballastless track of high-speed railway complex environment simulation experiment system |
| CN110567871B (en) * | 2019-07-23 | 2021-07-30 | 西南交通大学 | Friction experiment device, bearing mechanism, loading mechanism and friction experiment method thereof |
| CN110779821B (en) * | 2019-10-23 | 2021-04-13 | 成都西交轨道交通技术服务有限公司 | Concrete sleeper fatigue strength testing device and monitoring system |
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| US3735495A (en) * | 1970-07-02 | 1973-05-29 | Plasser Bahnbaumasch Franz | Mobile track survey apparatus for determining grade variations |
| CN101865785A (en) * | 2010-06-08 | 2010-10-20 | 江苏中辆科技有限公司 | Wheel wear resistance combined test stand of rail vehicle |
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| CN103063451A (en) * | 2012-12-26 | 2013-04-24 | 浙江大学 | Rail transit train wholly moving load analog loading method and device |
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| JP3105674B2 (en) * | 1992-11-25 | 2000-11-06 | 三菱重工業株式会社 | Model test equipment for land vehicles |
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2013
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Patent Citations (4)
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|---|---|---|---|---|
| US3735495A (en) * | 1970-07-02 | 1973-05-29 | Plasser Bahnbaumasch Franz | Mobile track survey apparatus for determining grade variations |
| CN101865785A (en) * | 2010-06-08 | 2010-10-20 | 江苏中辆科技有限公司 | Wheel wear resistance combined test stand of rail vehicle |
| CN103015280A (en) * | 2012-12-26 | 2013-04-03 | 浙江大学 | Moving load analog loading method and device for rail transit wheel axle |
| CN103063451A (en) * | 2012-12-26 | 2013-04-24 | 浙江大学 | Rail transit train wholly moving load analog loading method and device |
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| 空中轨道结构车-轨耦合模型试验研究;李方元等;《同济大学学报（自然科学版）》;20120228;第40卷(第2期);第186-190页 * |
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