华东交通大学学报2025，Vol.42Issue(5)：93-103,11.
重载铁路道岔尖轨声发射波传播特性研究
Research on the Propagation Characteristics of Acoustic Emission Wave at Switch Sharp Rail of Heavy-Haul-Railway
摘要
Abstract
In order to study the propagation characteristics of acoustic emission waves generated by damage in the switch rail of heavy-haul-railway,this article takes the switch rail of the No.12 turnout on heavy haul rail-ways as the research object.Combining Abaqus simulation and the lead-break acoustic emission experimental technique,it simulates the acoustic emission signal generated by the damage of the switch rail through the lead-break experiment,conducts a detailed analysis of the acoustic emission simulation method of the turnout switch rail,verifies the correctness and effectiveness of the simulation model,and validates the simulation results through on-site measurements.The results show that the damage emission signals in different characteristic sec-tions of the switch rail have similar frequency distribution characteristics.However,the intensity gradually de-creases with the increase of the characteristic section.Moreover,with the continuous increase of the conduction distance,the energy disperses to other frequency bands in the wavelet time-frequency diagram.The introduction of the damage model increases the response of the acoustic emission signals in each frequency band,especially producing an abnormal peak between 160 and 200 kHz.This result has also been verified through on-site mea-surements.The research results can provide reference for the analysis and application of acoustic emission sig-nals in the detection of switch rail damage.关键词
重载铁路/道岔尖轨/伤损检测/声发射技术/断铅实验Key words
heavy-haul-railway/switch sharp rail/damage detection/acoustic emission technology/lead-break experiment分类
交通运输引用本文复制引用
冯青松,袁佳鹏,刘健,刘庆杰..重载铁路道岔尖轨声发射波传播特性研究[J].华东交通大学学报,2025,42(5):93-103,11.基金项目
国家自然科学基金项目(52178423) （52178423）
