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Damage assessment method and system for railway pier based on traffic safety and dynamic response

A dynamic response and driving safety technology, applied in special data processing applications, instruments, geometric CAD, etc., to quantify the impact of driving safety and dynamic response, and ensure the effect of train driving

Active Publication Date: 2022-05-10
EAST CHINA JIAOTONG UNIVERSITY
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  • Claims
  • Application Information

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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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  • Damage assessment method and system for railway pier based on traffic safety and dynamic response
  • Damage assessment method and system for railway pier based on traffic safety and dynamic response
  • Damage assessment method and system for railway pier based on traffic safety and dynamic response

Examples

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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 present invention discloses a method and system for assessing railway pier damage based on traffic safety and dynamic response. The method includes: S1: Constructing a spatial vibration analysis model of a train-track-bridge system, and introducing the pier disease state into the spatial vibration analysis model ; S2: Based on the simulation of the spatial vibration analysis model after introducing the pier disease state, the σ p ‑V relationship and σ c ‑V relation; S3: based on the σ p ‑V relationship, the σ c ‑V relationship to get the critical vehicle speed V cr , and then determine the design speed V d with V cr The relationship between them is used to determine whether derailment will occur. If derailment occurs, the pier disease will affect the train operation. Utilizing the evaluation method described in the present invention can quantify the impact of bridge pier damage on traffic safety and system dynamic response, and provide a basis for effectively evaluating damage levels and maintenance standard levels, as well as controlling train traffic safety on heavy-duty railway bridges and bridge pier damage remediation data.

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 Patents(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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