A Method and Calculation System for Establishing Irregularity Spectrum of Earthquake-Induced Damaged Ballastless Track

A technology for track irregularities and ballastless tracks, applied in design optimization/simulation, geometric CAD, sustainable transportation, etc., can solve problems such as the uneven spectrum of ballastless tracks on high-speed railway bridges, and the safety of driving without high-speed railway bridges , to achieve the effect of improving the ability to avoid risks

CN111753366BActive Publication Date: 2022-06-03EAST CHINA JIAOTONG UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-06-03

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Abstract

The invention discloses a method and a calculation system for establishing an irregularity spectrum of an earthquake-induced damage ballastless track. By establishing a multi-scale simulation model of a high-speed railway ballastless track-bridge system, a large number of nonlinear earthquakes of the system under different levels of earthquakes are carried out. Response analysis to obtain additional track irregularity samples; then superimpose the additional track irregularity samples with the initial track irregularity samples to obtain superimposed track irregularity samples; then obtain the track irregularity spectrum after earthquake action according to the superimposed irregular sample; According to the irregularity spectrum of the ballastless track after the earthquake, the corresponding average spectrum and boundary spectrum of the irregularity are obtained, and the segmental fitting is carried out to obtain the average spectrum of the irregularity of the ballastless track, the boundary spectrum of the irregularity of the ballastless track and their fitting formula. The method of the invention can quickly and accurately provide the irregularity spectrum of the track on the bridge after the key structures and components of the high-speed railway bridge track are damaged by earthquakes, and provides an important theoretical basis for safe driving and earthquake-resistant design of the high-speed railway bridge.
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Description

technical field

[0001] The invention relates to a method and a calculation system for establishing the irregularity spectrum of a ballastless track caused by earthquake damage. 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. The theme of high-speed railway research and technological innovation will gradually shift from design and construction technology to infrastructure condition maintenance, train operation safety management, and system disasters. Safe and efficient operation guarantee technology such as risk management. The requirements for track geometry, stiffness and smoothness of high-speed railways increase exponentially with the operating speed, and millimeter-level or even sub-millimeter-level accuracy should always be achieved and maintained during construction, operation and maintenance. However, because the high-speed railw...

Examples

Embodiment 1

[0036] The present embodiment is a method for establishing a seismically damaged ballastless track irregularity spectrum, comprising 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 track structure on it, such as figure 1 As shown in the figure, a large number of systematic nonlinear seismic response analysis considering the uncertainty of structural parameters and the randomness of ground motions under different earthquake levels are carried out, and the cumulative damage and deformation of structures and components such as tracks, supports and piers caused by earthquakes are obtained. The different levels of earthquakes include frequent earthquakes, design earthquakes, and rare earthquakes.

[0038] The second step: According to the response analysis of the first step, the damage law of the seismically induced track...

Embodiment 2

[0078] The present embodiment is a computing system for seismically damaged ballastless track irregularity spectrum, which is used to establish the seismically damaged ballastless track irregularity spectrum described in Embodiment 1, and the computing system includes the following modules:

[0079] 1) Acquisition module: used to acquire the cumulative damage and deformation of structures and components such as tracks, supports and piers caused by earthquakes;

[0080] 2) Calculation module: It is used to input the cumulative residual deformation damage of each structure and component into the mapping analytical model of the track geometry change caused by the cumulative damage of the seismic track-bridge system, and calculate the track geometry change caused by the seismic system damage. quantity;

[0081] 3) Superposition module: It is used to superimpose the additional track irregularity samples caused by the earthquake-induced track-bridge system damage with the initial tr...