激光与光电子学进展, 2019, 56 (8): 081201, 网络出版: 2019-07-26
激光点源与线源激发表面波与钢轨缺陷作用的有限元仿真和实验 下载: 1268次
Finite Element Simulation and Experiment on Interaction of Surface Waves Excited by Laser Point or Line Source with Rail Defects
测量 激光超声 钢轨表面缺陷 无损检测 声表面波 有限元法 measurement laser ultrasonic rail surface defects non-destructive detection acoustic surface wave finite element method
摘要
研究了点源、线源激光激发超声波对钢轨表面缺陷检测的影响。使用有限元法对比了这两种激发方式的声场、声波信号及对钢轨表面缺陷检测的有效性。通过有限元仿真分别对水平、垂直、斜45°的钢轨表面缺陷进行了检测并进行了实验验证。实验与仿真结果一致表明,由激光线源激发的声表面波指向性好、信号幅值大,更利于钢轨表面缺陷的检测,且对不同类型的钢轨表面缺陷均具有较好的检测能力。
Abstract
The influence of ultrasonic wave excited by a laser point or line source on the detection of rail surface defects is investigated. In addition, the sound fields, acoustic signals and the detection effectiveness of rail surface defects under these two types of excitation modes are compared by the finite element method. The detection of horizontal, vertical, and oblique 45° rail surface defects is simulated by the finite element method and the corresponding experimental test is also conducted. The consistency between experimental and simulated results shows that the acoustic surface wave excited by a laser line source possesses good directionality and a high signal amplitude, which is more conducive to the detection of rail surface defects and has a good detection ability for different types of rail surface defects.
隋皓, 高晓蓉, 罗林, 朱宏娜, 钟云杰. 激光点源与线源激发表面波与钢轨缺陷作用的有限元仿真和实验[J]. 激光与光电子学进展, 2019, 56(8): 081201. Hao Sui, Xiaorong Gao, Lin Luo, Hongna Zhu, Yunjie Zhong. Finite Element Simulation and Experiment on Interaction of Surface Waves Excited by Laser Point or Line Source with Rail Defects[J]. Laser & Optoelectronics Progress, 2019, 56(8): 081201.