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Railway pier damage evaluation method and system based on traffic safety and dynamic response, terminal equipment and readable storage medium

A dynamic response and driving safety technology, applied in design optimization/simulation, special data processing applications, instruments, etc., to achieve the effect of improving safety

Active Publication Date: 2021-02-12
EAST CHINA JIAOTONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to address the lack of existing impacts on the safety of trains under the assessment methods for reflecting bridge pier damage. The present invention provides a method, system, terminal equipment and method for assessing railway pier damage based on driving safety and dynamic response. readable storage medium

Method used

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  • Railway pier damage evaluation method and system based on traffic safety and dynamic response, terminal equipment and readable storage medium
  • Railway pier damage evaluation method and system based on traffic safety and dynamic response, terminal equipment and readable storage medium
  • Railway pier damage evaluation method and system based on traffic safety and dynamic response, terminal equipment and readable storage medium

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Embodiment 1

[0196] Example 1: Taking pier body damage as an example

[0197] Damage to the pier body will reduce the stiffness of the pier body. Here, the equivalent stiffness method is used to keep the section of the pier body unchanged, and the stiffness of the pier body after damage is simulated by reducing the elastic modulus of the pier body in the model.

[0198] The specific conditions are: Take the single-line double-T girder bridge with a span of 32 on the Daqin Line as an example. m, it is assumed that the pier body of the fourth pier is damaged, and the elastic modulus of the pier body is reduced by 10% after the damage. The track structure is ballast track, which is composed of 60kg / m steel rail, type II sleeper and crushed stone ballast. The train is calculated and marshalled as 1 DF4 locomotive + 16 empty freight cars, and the design speed is V d =120km / h. Input the above conditions into the model as the basic parameters, solve the system space vibration matrix equation (...

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Abstract

The invention discloses a railway pier damage evaluation method and system based on driving safety and dynamic response, terminal equipment and a readable storage medium. The method comprises the steps: S1, constructing a spatial vibration analysis model of a train track bridge system, and introducing a pier disease state into the spatial vibration analysis model; s2, performing simulation based on the spatial vibration analysis model after the bridge pier disease state is introduced to obtain a sigma pV relationship and a sigma cV relationship; and S3, obtaining a critical vehicle speed Vcr based on the sigma pV relationship and the sigma cV relationship, further judging a relationship between a designed vehicle speed Vd and the Vcr, judging whether derailment occurs or not, and if derailment occurs, causing bridge pier diseases to influence train operation. By means of the evaluation method, the influence of bridge pier damage on driving safety and system dynamic response can be quantified, and basic data are provided for effectively evaluating the damage grade and the maintenance standard grade and controlling the driving safety of trains on heavy-load railway bridges and bridgepier damage renovation.

Description

technical field [0001] The invention belongs to the technical field of train safety control, and in particular relates to a method, system, terminal equipment and readable storage medium for assessing railway pier damage based on driving safety and dynamic response. Background technique [0002] Heavy-duty railways have large transportation capacity and significant technical and economic benefits, which have been confirmed by the practice of countries all over the world. The development of heavy-haul transportation and the formation of a transportation system with strong transportation capacity, advanced organization and perfect functions are important contents of my country's "medium and long-term railway network planning". Bridge structure is an important part of heavy-duty railway infrastructure and an important guarantee for the safe operation of trains. my country's heavy-duty railways are mostly T-girder bridges. During their service period, the increase of train axle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/20G06F119/14
CPCG06F30/13G06F30/20G06F2119/14
Inventor 龚凯刘林芽冯青松余翠英罗锟刘全民
Owner EAST CHINA JIAOTONG UNIVERSITY
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