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Analysis method for effects of uneven settlement of subgrade on random vibration characteristics of track structure

A technology of random vibration and analysis methods, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as uneven properties of embankment fillings

Inactive Publication Date: 2018-06-29
DALIAN UNIV OF TECH
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Problems solved by technology

However, in the actual railway line, because the thickness and properties of the subgrade soil layer are constantly changing along the longitudinal direction of the line, and the embankment filling is also uneven in nature, coupled with the continuous erosion of groundwater and the long-term repetition of train loads Uneven settlement of the subgrade will be inevitable

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  • Analysis method for effects of uneven settlement of subgrade on random vibration characteristics of track structure
  • Analysis method for effects of uneven settlement of subgrade on random vibration characteristics of track structure
  • Analysis method for effects of uneven settlement of subgrade on random vibration characteristics of track structure

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Embodiment

[0030] In order to analyze the influence of uneven subgrade settlement on the random vibration characteristics of the track structure, this paper focuses on the random vibration response of each component of the track structure when a=0.7 and a=1.0. The specific calculation scheme is shown in Table 6.1.

[0031] Table 6.1 Calculation scheme for uneven subgrade settlement

[0032] Tab.6.1 The simulation scheme of uneven settlement of subgrade

[0033]

[0034] In the numerical simulation calculation in this chapter, the load moving speed V=180km / h and the corresponding load power spectrum are taken, and the following dynamic quantities are used as analysis indicators:

[0035] (1) Rail displacement (m);

[0036] (2) Rail acceleration (m / s 2 );

[0037] (3) sleeper displacement (m);

[0038] (4) Sleeper acceleration (m / s 2 );

[0039] (5) ballast bed displacement (m);

[0040] (6) Ballast bed acceleration (m / s 2 ).

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Abstract

The invention discloses an analysis method for effects of uneven settlement of a subgrade on random vibration characteristics of a track structure. The method comprises the following steps of S1, collecting rail displacement parameter information, rail acceleration parameter information, sleeper displacement parameter information, sleeper acceleration information, track bed displacement information and track bed acceleration information of a ballast track; S2, an analysis model of the random vibration characteristics of the track structure under the condition of uneven settlement of the subgrade is established, and the characteristics of the track structure are analyzed and evaluated by calculating uneven settlement reduction coefficients of the subgrade; S3, the causal relationship of theeffects of the uneven settlement of the subgrade on the track structure is summarized, and data parameter values and impact analysis reports are sorted out.

Description

technical field [0001] The invention relates to the field of track safety analysis and control, in particular to a method for analyzing random vibration characteristics of track structures caused by uneven subsidence of roadbeds. Background technique [0002] With the continuous development of computer technology and the emergence of various commercial finite element software, the finite element method has been developed rapidly and used in various analysis, such as thermodynamic analysis, fluid dynamic analysis, performance analysis of mechanical parts, structural static and dynamic analysis, etc. In the vibration analysis of railway track structures, the finite element method has also been gradually adopted, which greatly improves the accuracy of the calculation results when the discrete elements are small enough, and solves many problems that were difficult to solve before. [0003] The ballasted track structure will have the following three main types of defects: 1) due...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23
Inventor 赵岩仲伟秋
Owner DALIAN UNIV OF TECH
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