Construction of Metro Rail Weld Irregularity Spectrum and Its Application to the Analysis of Dynamic Wheel-Rail Interaction

被引：0

作者：

Xie, Chenxi ^{[1
]}

Tao, Gongquan ^{[1
]}

Yang, Xiaoxuan ^{[2
]}

Guan, Qinghua ^{[1
]}

Li, Wei ^{[1
]}

Wen, Zefeng ^{[1
]}

机构：

[1] Southwest Jiaotong Univ, State Key Lab Rail Transit Vehicle Syst, Chengdu 610031, Peoples R China

[2] Shijiazhuang Tiedao Univ, State Key Lab Mech Behav & Syst Safety Traff Engn, Shijiazhuang 050043, Peoples R China

来源：

INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS | 2025年

关键词：

Metro; rail weld; irregularity spectrum; dynamic wheel-rail interaction; safety reliability; TRACK INTERACTION; VIBRATION; GEOMETRY; PREDICTION;

D O I：

10.1142/S0219455426501701

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Rail weld irregularities (RWIs) significantly influence the dynamic wheel-rail interaction. Evaluating and controlling these irregularities is essential for ensuring operational safety. In this study, the characteristics of RWIs measured on more than ten metro lines were analyzed, and the power spectral density of the RWIs based on the measurement results was established. Based on the spectrum, a simulation method for RWIs was presented to obtain a realistic RWI with information on wavelengths and amplitudes. A dynamic model based on the vehicle-track coupled dynamics theory was established and verified using the measured axle box acceleration. The influence of the RWIs on the dynamic wheel-rail interaction was investigated using the RWIs as inputs for the dynamic model. The effectiveness of the RWI simulation method was verified by comparing the responses induced by the measured, formulaic, and simulated RWIs. Finally, a method for determining the safety limit of RWI based on the response distribution and reliability theory was proposed. The safety reliability of the four types of RWI with complex wave was analyzed using the proposed method. These results are expected to provide guidelines for maintaining RWI in metro lines.

引用

页数：31