Method for estimating safety domain of track irregularity amplitude

A technology of track irregularities and safety domains, applied in computing, special data processing applications, instruments, etc., can solve the problems that cannot fully consider various factors of the track, cannot accurately reflect the actual operation of the system, etc.

Active Publication Date: 2012-08-01
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0005] Aiming at the deficiencies mentioned in the above background technology that the existing track irregularity method cannot fully consider various factors of the trac

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  • Method for estimating safety domain of track irregularity amplitude
  • Method for estimating safety domain of track irregularity amplitude
  • Method for estimating safety domain of track irregularity amplitude

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Embodiment Construction

[0043] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0044] The purpose of the present invention is to analyze the impact of the track irregularity amplitude on driving safety, and obtain the safety domain boundary of the track irregularity amplitude under different driving speeds (promptly determine the scope of a track irregularity amplitude, so that the irregular amplitude is between When within this range, driving safety can be guaranteed, if the amplitude exceeds this range, driving safety cannot be ensured), it can be used for quantitative evaluation of track geometric safety status, and at the same time it can support the management and control of high-speed railway track irregularity amplitude and the formulation of related standards . The method provided by the...

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Abstract

The invention discloses a method for estimating a safety domain of a track irregularity amplitude in the technical field of track traffic safety. The method comprises the following steps of: establishing a wheel/rail dynamics simulation model; inputting track irregularity data into the wheel/rail dynamics simulation model to obtain derail coefficient, wheel load reduction rate and wheel/rail cross force, and smoothing the derail coefficient; marking the track irregularity data once; performing grid division of the track irregularity data, counting the track irregularity data in grid to obtain dangerous point distribution rate of the grid, and completing secondary marking on the track irregularity data; and training a support vector classifier; and finally testing the trained support vector classifier, if a reference standard is reached, determining that the support vector classifier is available, otherwise, training the support vector classifier again. The method can be used for quantitative evaluation of a geometrical shape of a high-speed railway track on traffic safety.

Description

technical field [0001] The invention belongs to the technical field of rail transit safety, and in particular relates to a method for estimating a safe region of track irregularity amplitude. Background technique [0002] Safety and high speed are the core issues to be considered first in the construction of high-speed railways. Providing tracks with fast running speed, high safety and reliability, and good ride comfort is also the most basic goal of high-speed railway construction and management. The smoothness of the track is directly related to the running quality of the train and the force between the wheels and rails. It is the main source of the vibration of the rolling stock. The large-scale track irregularity not only seriously affects the ride comfort but also endangers the driving safety. Therefore, a good track smoothness It is an important condition to reduce the wheel-rail force and ensure driving safety. Therefore, it is of great significance to determine the ...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 秦勇张媛贾利民廖贵玲陈波邢宗义
Owner BEIJING JIAOTONG UNIV
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