A railway fastener detection method and device

Abstract

The invention provides a railway fastener detection method and device, and the method comprises the steps: obtaining a three-dimensional nonlinear finite element model which is composed of all parts in a fastener system, and enabling the fastener system to comprise an elastic strip; Carrying out static analysis on the three-dimensional nonlinear finite element model to obtain analysis data; Performing modal analysis on the three-dimensional nonlinear finite element model according to the analysis data to obtain each order of vibration mode of the elastic strip and an inherent frequency corresponding to each order of vibration mode; Steel rail corrugation data can be obtained on the basis; Analyzing according to the steel rail corrugation data to obtain wheel rail excitation frequency; Andanalyzing whether the elastic strip resonates or not according to the inherent frequency and the wheel track excitation frequency. According to the method, the influence of each component of the fastener system on the inherent frequency of the elastic strip is fully considered, and the original proportion three-dimensional nonlinear finite element model of the fastener system is established. And carrying out online analysis on the wheel track excitation frequency to obtain the inherent frequency of the fastener system in various states, and comparing the inherent frequency with the wheel trackexcitation frequency obtained by actual detection to judge whether the fastener system generates resonance or not.

Description

technical field [0001] The invention relates to the technical field of rail safety protection, in particular to a method and device for detecting railway fasteners. Background technique [0002] With the increase of the operating time of subways and high-speed rails, the problem of short-wave corrugation of rails will become increasingly prominent, especially on small-radius curved lines. Rail short-wave grinding tends to aggravate the high-frequency vibration response and radiation noise of the wheel-rail system. In severe cases, it will also cause problems such as fastener spring breakage and splash impact on car windows, posing a certain threat to driving safety. The existing frequency identification method analyzes the entire fastener system as a spring-damping unit, but this method still has the problem of incomplete detection, and there are still omissions in the prevention of safety accidents. Contents of the invention [0003] In order to overcome the deficiencies...

AI Technical Summary

Problems solved by technology

Rail short-wave grinding can easily aggravate the high-frequency vibration response of the wheel-rail system and its radiation noise. In severe cases, it will also cause problems such as fastener spring breakage and splashes hitting the windows, which pose a certain threat to driving safety.

The existing frequency identification method analyzes the entire fastener system as a spring-damping unit, but this method still has the problem of incomplete detection, and there are still omissions in the prevention of safety accidents

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