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Method for establishing irregularity spectrum of earthquake-induced damage ballastless track and calculation system

A technology for track irregularities and ballastless tracks, applied in design optimization/simulation, special data processing applications, geometric CAD, etc., can solve the uneven spectrum of ballastless tracks on high-speed railway bridges, and the driving safety of high-speed railway bridges, etc. problems, to achieve the effect of improving the ability to avoid risks

Active Publication Date: 2020-10-09
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, despite the rapid development of high-speed railways, the irregularity spectrum of ballastless tracks on high-speed railway bridges after earthquakes has not yet been established. driving safety standards

Method used

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  • Method for establishing irregularity spectrum of earthquake-induced damage ballastless track and calculation system
  • Method for establishing irregularity spectrum of earthquake-induced damage ballastless track and calculation system
  • Method for establishing irregularity spectrum of earthquake-induced damage ballastless track and calculation system

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Experimental program
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Effect test

Embodiment 1

[0036] This embodiment is a method for establishing an irregularity spectrum of a ballastless track caused by earthquake damage, including the following steps:

[0037] Step 1: Establish a multi-scale simulation model of the high-speed railway track-bridge system considering the influence of the approach bridges on both sides, the subgrade and the upper track structure, such as figure 1 As shown, a large number of systematic nonlinear seismic response analyzes considering the uncertainty of structural parameters and the randomness of ground motion under different levels of earthquake action were carried out to obtain the cumulative damage deformation of structures and components such as rails, bearings, and bridge piers caused by earthquakes. The different levels of earthquakes include frequent earthquakes, design earthquakes and rare earthquakes.

[0038] Step 2: According to the response analysis of the first step, find out the damage law of the seismic-induced track-bridge ...

Embodiment 2

[0078] This embodiment is a calculation system for the irregularity spectrum of the ballastless track caused by earthquake damage, which is used to establish the irregularity spectrum of the ballastless track caused by earthquake damage described in Embodiment 1. The calculation system includes the following modules:

[0079] 1) Acquisition module: used to obtain the cumulative damage and deformation of structures and components such as rails, bearings, and bridge piers under earthquake action;

[0080] 2) Calculation module: it is used to input the cumulative residual deformation damage of each structure and component into the mapping analysis model of the geometric shape and position change of the track caused by the cumulative damage of the seismic-induced track-bridge system, and calculate the geometric shape and position change of the track caused by the seismic system damage quantity;

[0081] 3) Superposition module: used to superimpose the additional track irregularity...

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Abstract

The invention discloses a method for establishing irregularity spectrum of earthquake-induced damage ballastless track and a calculation system, and the method comprises the steps: building a high-speed railway ballastless track-bridge system multi-scale simulation model, carrying out a large number of system nonlinear earthquake response analysis under the action of earthquakes at different levels, and obtaining a track additional irregularity sample; superposing the track additional irregularity sample and the initial track irregularity sample to obtain a superposed track irregularity sample; solving a track irregularity spectrum after the earthquake action according to the superposed irregularity sample; solving a corresponding irregularity average spectrum and a boundary spectrum according to the ballastless track irregularity spectrum after the earthquake action, and carrying out piecewise fitting to obtain a ballastless track irregularity average spectrum, a ballastless track irregularity boundary spectrogram and a fitting formula thereof. The method can quickly and accurately provide the irregularity spectrum of the track on the bridge after each key structure and part of the high-speed railway bridge track are damaged by earthquakes, and provides an important theoretical basis for safe driving and anti-seismic design of the high-speed railway bridge.

Description

technical field [0001] The invention relates to a method and a calculation system for establishing an irregularity spectrum of a ballastless track damaged by earthquakes. Background technique [0002] Today, the development of high-speed railways has gradually shifted from large-scale construction to the stage of safe operation management and maintenance, and the subject of high-speed railway research and technological innovation will gradually shift from design and construction technology to infrastructure state maintenance, train operation safety management and system disasters Safe and efficient operation assurance technologies such as risk management. The requirements for track geometry and stiffness smoothness of high-speed railways increase exponentially with the operating speed, and millimeter-level or even sub-millimeter-level precision should always be achieved and maintained in construction, operation and maintenance. However, since the high-speed railway cannot c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/20
CPCG06F30/13G06F30/20Y02T90/00
Inventor 冯玉林蒋丽忠周旺保陈梦成张云泰何彬彬聂磊鑫柴喜林吴凌旭高鸽刘韶辉许添鑫
Owner EAST CHINA JIAOTONG UNIVERSITY