轨温对道岔尖轨伤损超声导波检测的影响研究  

Study on the Influence of Rail Temperature on Ultrasonic Guided Wave Detection for Switch Rail Damage

作　　者：刘秀 LIU Xiu(Production Technology Department of CHN Energy Baoshen Railway Group Co.Ltd.,Ordos Inner Mongolia 017000,China)

机构地区：[1]国能包神铁路有限责任公司生产技术部,内蒙古鄂尔多斯017000

出　　处：《铁道建筑技术》2024年第10期200-203,共4页Railway Construction Technology

基　　金：国家能源投资集团有限责任公司技术开发项目(20230336)。

摘　　要：尖轨是铁路线路中重要基础设施,对尖轨进行无损检测至关重要。由于环境温度导致尖轨轨温的变化,在某一温度点采集的导波基准信号并不能满足所有温度下尖轨检测需求。因此,对尖轨进行超声导波无损检测时,须考虑轨温对道岔尖轨超声导波检测的影响。通过理论分析与温度试验得到温度影响导波传播的一般规律,并拟合出线性关系式,再通过开展现场试验验证温度补偿效果。结果表明,温度补偿后,尖轨伤损定位精度大幅提高。研究结果可为导波信号温度补偿提供参考依据。The switch rail is an important infrastructure in railway line,so it is very important to carry out non-destructive testing on the switch rail.Because the ambient temperature causes the change of the temperature of the switch rail,the guided wave reference signal collected at a certain temperature point can not meet the needs of the switch rail detection at all temperatures.Therefore,the influence of rail temperature on ultrasonic guided wave detection of switch rail must be considered when conducting ultrasonic guided wave nondestructive testing of switch rail.Through theoretical analysis and temperature test,the general rule of temperature affecting guided wave propagation is obtained,and the linear relation is fitted.Subsequently,field experiments were carried out to verify the effect of temperature compensation.The results show that after temperature compensation,the locating accuracy of switch rail damage is greatly improved.The research results can provide reference for temperature compensation of guided wave signal.

关 键 词：道岔尖轨 超声导波 伤损检测 温度影响 试验研究 

分 类 号：U213.63[交通运输工程—道路与铁道工程]