基于Lamb波的焊缝缺陷检测仿真研究
Simulation Study on Weld Defect Detection Based on Lamb Waves
赵杰飞 1张薇薇2
作者信息
- 1. 南通华信中央空调有限公司,江苏 南通 226000
- 2. 南通万达能源动力科技有限公司,江苏 南通 226000
- 折叠
摘要
采用了超声Lamb波方法进行焊缝检测,并对其进行了数值仿真研究.在数值仿真过程中,研究了焊缝截面形状变化对超声Lamb波传播的影响.为了进一步提高焊缝的检测精度,采用了WT时频分析方法,有效地识别出焊缝余高超出实际测量范围 2%的缺陷,实现了在杂波干扰下目标信号的辨识.频带窄且无干扰频率,增强了检测信号的清晰度.
Abstract
The ultrasonic Lamb wave method was employed for weld inspection,and a numerical simulation study was conducted on it.In the process of numerical simulation,the influence of variations in weld cross-sectional shape on the propagation of ultrasonic Lamb waves was investigated.To further enhance the detection accuracy of welds,the WT time-frequency analysis method was adopted,which effectively identified defects where the weld reinforcement exceeded the actu-al measurement range by 2%,achieving the identification of target signals under clutter interference.The narrow frequency band and absence of interfering frequencies enhanced the clarity of the detection signals.
关键词
Lamb波/模拟仿真/缺陷检测/时频分析Key words
lamb wave/simulation/defect detection/time-frequency analysis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据