文章摘要
孟翔震,李再帏,朱文发,何越磊,路宏遥.基于空耦超声Lamb波的金属板状结构内部缺陷检测方法[J].,2020,39(2):316-324
基于空耦超声Lamb波的金属板状结构内部缺陷检测方法
Detection of internal defect in metal plate structures using air-coupled ultrasonic Lamb waves
投稿时间:2019-05-07  修订日期:2020-02-26
中文摘要:
      针对接触式超声检测方法在金属板结构内部缺陷实际工程检测中存在的环境要求高,效率低,操作难度高等问题,提出了空耦超声Lamb波检测方法,该方法能更好的适应现场应用环境,提高检测效率,减少传感器数量等。通过有限元仿真和实验分析比较了空耦超声检测与接触式超声检测两种方法接收到的信号和成像效果。结果表明:有限元仿真和实验中,空耦超声检测方法对缺陷位置的定位误差分别为2mm和2mm,接触式检测方法对缺陷位置的定位误差分别为2.24mm和11.3mm,空耦检测具有较高的定位精度;单侧激励条件下,适合采用A0模态Lamb波对板内缺陷进行检测;空耦超声检测可以通过调整信号接收角度接收单一模态Lamb波,避免伪像产生。
英文摘要:
      Aiming at the problems of high environmental requirements, low efficiency and high operational difficulty of the contact ultrasonic detection method in the actual engineering detection of defects in the metal plate structures, the Lamb wave detection method of air-coupled ultrasonic was proposed, which can better adapt to the field application environment, improve the detection efficiency and reduce the number of sensors. The finite element simulation and experimental analysis are compared to compare air-coupled ultrasonic testing and the contact ultrasonic testing methods for receiving signals and imaging effects. The results show that In the finite element simulation and experiment, the positioning error of the air-coupled ultrasonic detection method to the defect position is 2mm and 3.6mm respectively, and the positioning error of the contact detection method to the defect position is 2.24mm and 11.3mm respectively. The air-coupled detection has a high positioning accuracy. Under the one-side excitation condition, the A0 mode of Lamb wave used to detect the defects in the board is suitable; the air-coupled ultrasonic detection can receive the single mode Lamb wave by adjusting the signal receiving angle to avoid artifact generation.
DOI:10.11684/j.issn.1000-310X.2020.02.020
中文关键词: 金属板缺陷  空耦  成像检测  Lamb波
英文关键词: Metal plate defects  Air-coupled  Imaging detection  Lamb wave
基金项目:国家自然科学基金项目(51808333,51608202),上海市科委重点支撑项目(16030501400)
作者单位E-mail
孟翔震 上海工程技术大学 741005076@qq.com 
李再帏 上海工程技术大学 lzw_5220964@163.com 
朱文发 上海工程技术大学城市轨道交通学院  
何越磊 上海工程技术大学城市轨道交通学院  
路宏遥 上海工程技术大学城市轨道交通学院  
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