摘要
基于漏磁检测原理,利用有限元对管道焊缝漏磁进行计算分析,分别研究探头提离和缺陷深度对漏磁场及其分布情况的影响。计算结果表明,探头提离对漏磁场信号值有很强的影响作用,随着探头提离的增大,漏磁场先快速减小后变化缓慢;改变焊缝上缺陷的深度,漏磁场强度会随着深度增加而增大。通过分析数值信号和探头提离的非线性关系,以及缺陷的漏磁信号在对称位置上的对称关系,可借此设计交错阵列排布的一种焊缝漏磁检测的高分辨探头。
Based on the principle of magnetic flux leakage detection,the finite element method is used to calculate and analyze the magnetic flux leakage of pipeline welds.The effects of probe lift-off and defect depth on the magnetic flux leakage and its distribution are studied respectively.The calculation results show that the probe lift-off has a strong effect on the value of the leakage magnetic field signal.With the increase of the probe lift-off,the leakage magnetic field first decreases rapidly and then changes slowly;changes the depth of the defect on the weld,and the strength of the leakage magnetic field Will increase as the depth increases.By analyzing the non-linear relationship between the numerical signal and the probe lift-off,as well as the symmetrical relationship between the magnetic flux leakage signal of the defect in the symmetrical position,we can design a high-resolution probe for weld flux leakage detection in a staggered array.
作者
陈兴阳
叶宇峰
宋俊俊
王康
Chen Xingyang;Ye Yufeng;Song Junjun;Wang Kang(Zhejiang Academy of Special Equipment Science,Hangzhou 310020;Key Laboratory of Special Equipment Safety Testing Technology of Zhejiang Province,Hangzhou 310020;Tomato Technology(Wuhan)Co.,Ltd,Wuhan 430076)
出处
《中国特种设备安全》
2021年第9期37-41,共5页
China Special Equipment Safety
基金
2019年浙江省质量技术监督局NQ1项目(20190112)。
关键词
焊缝检测
漏磁检测
缺陷
有限元计算
Weld inspection
Magnetic flux leakage inspection
Defect
Finite element calculation
