摘要
以双层钢板搭接区域内裂纹缺陷为检测对象,考虑钢板包覆和焊缝包围对检测信号的影响,提出利用SH0模态导波对裂纹缺陷进行检测的方法。基于Comsol多物理场仿真平台,建立双层钢板搭接三维结构模型,并在搭接区域内构建不同长度裂纹缺陷。结果表明,检测波长为12.8 mm,裂纹缺陷长度为10 mm时,缺陷回波信号与无缺陷时噪声信号基本重叠,无法检测;裂纹缺陷的长度从10~40 mm变化时,裂纹缺陷越长,回波信号越明显;裂纹缺陷的计算位置与实际位置的误差为1.79%。研究为双层钢板搭接区域内缺陷在线检测提供理论依据。
Detect the crack defects in the lap area of a double-layer steel plate,considerate the influence of steel cladding and weld surround on the detection signal,a method is proposed to detect crack defects by taking advantage of the SH0 mode guided wave without frequency dispersion.Based on the Comsol multi-physical simulation platform,a three-dimensional structure model of double-layer steel plate was established,and the crack defects of different lengths were constructed in the lap area.The results show that the defect echo signal is the same as that without the defect when the detection wavelength is 12.8 mm and a crack defect length is 10 mm,noise signals are largely overlapping and cannot be detected.As the length of the crack defect varies from 10 mm to 40 mm,the longer the crack defect is,the more pronounced the echo signal is.The error between the calculated position and the actual position is 1.79%.This study provides a theoretical basis for the online detection of defects in the lap area of double-layer steel plates.
作者
薛慧玲
戚青丽
杜文华
XUE Huiling;QI Qingli;DU Wenhua(School of Mechanical Engineering,North University of China,Taiyuan 030051,CHN;2China Special Equipment Inspection and Research Institute,Beijing 100029,CHN;Department of Electrical Engineering,Tsinghua University,Beijing 100084,CHN)
出处
《制造技术与机床》
北大核心
2021年第2期107-110,共4页
Manufacturing Technology & Machine Tool
基金
国家重点研发计划课题(2018YFC0809002)。
关键词
超声SH导波
缺陷检测
双层板搭接
有限元法
ultrasonic SH-guided waves
defect detection
double-layered plate lap
finite element method
