基于激光超声纵波的钢轨内部缺陷检测方法
An inspection method of rail internal defects based on laser ultrasonic longitudinal wave
摘 要
针对常规超声难以快速检测钢轨轨头轨距角内部缺陷的问题，提出了激光超声纵波定量检测钢轨轨距角内部缺陷的方法，通过有限元仿真建立了激光超声钢轨轨头内部缺陷检测模型，分析了激光超声纵波与不同长度内部缺陷之间的衍射规律，建立了定量检测理论模型，实现了钢轨内部缺陷的定量检测。有限元数值仿真结果表明，激光超声纵波可以有效地定量检测钢轨轨头内部缺陷的埋藏深度和长度，为钢轨内部缺陷的定量检测提供了一种可靠的检测方法。
纵波
钢轨
内部缺陷
定量检测
laser ultrasonic
longitudinal wave
rail
internal defect
quantitative inspection
Abstract
Aiming to overcome the difficulty in detecting the internal defects of gauge angle of rail head by conventional ultrasonic, a method for quantitative detection of internal defects of gauge angle steel rail by ultrasonic longitudinal waves was proposed in this article. It established the inspection model of laser ultrasonic rail head internal defects through finite element simulation, analyzed the diffraction law between ultrasonic longitudinal wave and internal defects of different lengths in detail, and a quantitative detection theory was set up which realized the quantitative detection of the internal defects of the rail. The finite element numerical simulation results show that the laser ultrasonic longitudinal wave can effectively and quantitatively detect the buried depth and length of the internal defects of the rail head, and it can provide a reliable detection method for the quantitative detection of the internal defects of the rail.
中图分类号 TG115.28 DOI 10.11973/wsjc202104004
所属栏目 2020远东无损检测新技术论坛论文精选
基金项目 国家自然科学基金委重大科研仪器研制项目（61527803）
收稿日期 2020/11/20
修改稿日期
网络出版日期
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备注武兴(1977-),男,高级工程师,主要从事承压特种设备检验技术研究与应用工作
引用该论文: WU Xing,MIAO Jiancheng,LIAO Weitao,ZHENG Kai,WANG Hailong. An inspection method of rail internal defects based on laser ultrasonic longitudinal wave[J]. Nondestructive Testing, 2021, 43(4): 16～19
武兴,缪建成,廖韦韬,郑凯,王海龙. 基于激光超声纵波的钢轨内部缺陷检测方法[J]. 无损检测, 2021, 43(4): 16～19
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参考文献
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【5】GARCIA G,KALAY S,CERNIGLIA D,et al.U-Rail laser-based ultrasonic inspection system prototype "system overview and status"[J].RT and S:Railway Track and Structures,2006,102(10):19-20.
【6】PANTANO A,CERNIGLIA D.Simulation of laser-generated ultrasonic wave propagation in solid media and air with application to NDE[J].Applied Physics A,2009,98(2):327-336.
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