CN108228932A - A kind of settlement of subgrade is to the analysis method of track structure random vibration characteristic - Google Patents
A kind of settlement of subgrade is to the analysis method of track structure random vibration characteristic Download PDFInfo
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- CN108228932A CN108228932A CN201611161472.0A CN201611161472A CN108228932A CN 108228932 A CN108228932 A CN 108228932A CN 201611161472 A CN201611161472 A CN 201611161472A CN 108228932 A CN108228932 A CN 108228932A
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
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Abstract
The invention discloses a kind of settlement of subgrade to the analysis method of track structure random vibration characteristic, include the following steps：S1：Acquire the steel rail displacement parameter information of Ballast track, the parameter information of rail acceleration, the parameter information of displacement of sleepers, sleeper acceleration information, railway roadbed displacement information and railway roadbed acceleration information；S2：It establishes under the conditions of settlement of subgrade to the analysis model of track structure random vibration characteristic, the characteristic of track structure is analyzed and evaluated by calculating settlement of subgrade reduction coefficient；S3：Summary finishing goes out the causality that settlement of subgrade influences track structure, sorts out data parameter value and impact analysis report figure.
Description
Technical field
The present invention relates to rail safety analysis and Control field more particularly to a kind of settlement of subgrade to track structure with
The analysis method of machine vibration characteristic.
Background technology
With the continuous development of computer technology and the appearance of various business finite element softwares, FInite Element has obtained very fast
Development, and is used in various analyses, as thermodynamic analysis, flow dynamics analysis, machine components performance evaluation, structural static and
Kinematic analysis etc..In railway track structure vibration analysis, FInite Element is also gradually used, sufficiently small in discrete unit
In the case of substantially increase the accuracy of result of calculation, and insoluble before solving the problems, such as many.
Ballast track structure will will appear following three kinds of major defect types：1) due to rubber mat plate ageing resistance and tension
The reduction of stretching property and the breakage of spring, caused fastener are loosened or are failed；2) due to plate knot of ballast bed, loose, uneven heavy
The continuous presence for accumulating or secretly cheating of drop amount, caused sleeper part is hanging or hangs sky completely；3) due to circuit longitudinal direction ground
The variation of soil nature matter and thickness and the effect of the uneven and underground water of roadbed filling, caused settlement of subgrade.
Roadbed is the banded structure object built according to route allocation and the requirement of certain technology, it is used directly to supporting track
Structure is the basis of rail track.But in practical rail track, since roadbed soil thickness and property are indulged along circuit
To being continually changing, and embankment fill material is in nature there is also non-uniform phenomenon, along with underground water it is continuous corrode and
The reasons such as the prolonged and repeated effect of train load, settlement of subgrade will be inevitable.
Invention content
According to problem of the existing technology, shake at random to track structure the invention discloses a kind of settlement of subgrade
The analysis method of dynamic characteristic：Include the following steps：
S1：Acquire the steel rail displacement parameter information of Ballast track, displacement of sleepers parameter information, railway roadbed displacement parameter information,
Pressure information and roadbed pressure information on pillow；
S2：It establishes under the conditions of settlement of subgrade to the analysis model of track structure random vibration characteristic, passes through calculating
Settlement of subgrade reduction coefficient is analyzed and evaluated the characteristic of track structure；
S3：Summary finishing goes out the causality that settlement of subgrade influences track structure, sorts out data parameter value
With impact analysis report figure.
The settlement of subgrade reduction coefficient calculates in the following way：
Roadbed is taken to support stiffness Kf'=γ (x) KfWith damping Cf'=γ (x) Cf, wherein settlement of subgrade reduction system
Number γ (x) uses following algorithm：
In formula, x is the length of distance sedimentation starting point；
A is settlement of subgrade reduction coefficient amplitude, and value range is 0~1.0；
l0To settle length.
By adopting the above-described technical solution, a kind of settlement of subgrade provided by the invention shakes at random to track structure
The analysis method of dynamic characteristic is obtained by research when there is settlement of subgrade, settles each component of track structure at amplitude
Vibrational energy have and significantly increase, and the increased maximum of ballast bed vibration energy, sleeper take second place, rail is minimum；Roadbed is not
Uniform settlement is more serious, and the amplification of each component vibrational energy of track structure is also bigger, the subgrade stiffness especially at sedimentation amplitude
When with damping being zero (operating mode three), vibration will become particularly acutely, it is necessary to be paid attention to.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or it will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the flow chart of the method for the present invention.
Specific embodiment
To make technical scheme of the present invention and advantage clearer, with reference to the attached drawing in the embodiment of the present invention, to this
Technical solution in inventive embodiments is clearly completely described：
A kind of settlement of subgrade as shown in Figure 1 to the analysis method of track structure random vibration characteristic, including with
Lower step：
S1：Acquire the steel rail displacement parameter information of Ballast track, displacement of sleepers parameter information, railway roadbed displacement parameter information,
Pressure information and roadbed pressure information on pillow；
S2：It establishes under the conditions of settlement of subgrade to the analysis model of track structure random vibration characteristic, passes through calculating
Settlement of subgrade reduction coefficient is analyzed and evaluated the characteristic of track structure；
S3：Summary finishing goes out the causality that settlement of subgrade influences track structure, sorts out data parameter value
With impact analysis report figure.
The settlement of subgrade reduction coefficient calculates in the following way：
Roadbed is taken to support stiffness Kf'=γ (x) KfWith damping Cf'=γ (x) Cf, wherein settlement of subgrade reduction system
Number γ (x) uses following algorithm：
In formula, x is the length of distance sedimentation starting point；
A is settlement of subgrade reduction coefficient amplitude, and value range is 0~1.0；
l0To settle length.
Embodiment：
In order to analyze influence of the settlement of subgrade to track structure random vibration characteristic, this paper primary studies a=
During 0.7 and a=1.0, the PSD response of each component of track structure, specific numerical procedure is shown in Table 6.1.
The numerical procedure of 6.1 settlement of subgrade of table
Tab.6.1 The simulation scheme of uneven settlement of subgrade
In the numerical simulation of this chapter calculates, load movement speed V=180km/h, corresponding load power spectrum are taken, and adopt
By the use of following dynamics amount as analysis indexes：
(1) steel rail displacement (m)；
(2) rail acceleration (m/s2)；
(3) displacement of sleepers (m)；
(4) sleeper acceleration (m/s2)；
(5) railway roadbed displacement (m)；
(6) railway roadbed acceleration (m/s2)。
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (2)
1. a kind of settlement of subgrade is to the analysis method of track structure random vibration characteristic, it is characterised in that including following step
Suddenly：
S1：Acquire the parameter letter of the steel rail displacement parameter information of Ballast track, the parameter information of rail acceleration, displacement of sleepers
Breath, sleeper acceleration information, railway roadbed displacement information and railway roadbed acceleration information；
S2：It establishes to the analysis model of track structure random vibration characteristic under the conditions of settlement of subgrade, by calculating roadbed
Differential settlement reduction coefficient is analyzed and evaluated the characteristic of track structure；
S3：Summary finishing goes out the causality that settlement of subgrade influences track structure, sorts out data parameter value and shadow
Ring analytical statement figure.
2. a kind of settlement of subgrade according to claim 1 is to the analysis method of track structure random vibration characteristic,
It is further characterized in that：The settlement of subgrade reduction coefficient calculates in the following way：
Take roadbed bearing stiffness K 'f=γ (x) KfWith damping Cf'=γ (x) Cf, wherein settlement of subgrade reduction coefficient γ
(x) following algorithm is used：
In formula, x is the length of distance sedimentation starting point；
A is settlement of subgrade reduction coefficient amplitude, and value range is 0~1.0；
l0To settle length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611161472.0A CN108228932A (en) | 2016-12-15 | 2016-12-15 | A kind of settlement of subgrade is to the analysis method of track structure random vibration characteristic |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611161472.0A CN108228932A (en) | 2016-12-15 | 2016-12-15 | A kind of settlement of subgrade is to the analysis method of track structure random vibration characteristic |
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| CN108228932A true CN108228932A (en) | 2018-06-29 |
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| CN201611161472.0A Pending CN108228932A (en) | 2016-12-15 | 2016-12-15 | A kind of settlement of subgrade is to the analysis method of track structure random vibration characteristic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942294A (en) * | 2021-05-13 | 2021-06-11 | 西南交通大学 | Roadbed uniformity detection method, device and equipment and readable storage medium |
-
2016
- 2016-12-15 CN CN201611161472.0A patent/CN108228932A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942294A (en) * | 2021-05-13 | 2021-06-11 | 西南交通大学 | Roadbed uniformity detection method, device and equipment and readable storage medium |
| CN112942294B (en) * | 2021-05-13 | 2021-08-31 | 西南交通大学 | Roadbed uniformity detection method, device and equipment and readable storage medium |
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Application publication date: 20180629 |