压力容器2024，Vol.41Issue(4)：1-8,42,9.DOI:10.3969/j.issn.1001-4837.2024.04.001
拱顶储罐罐顶缺陷漏磁检测技术研究
Research on magnetic flux leakage detection technology for defects in domed roof storage tanks
摘要
Abstract
In view of the problem that the safe operation of the tank roof is seriously threatened by corrosion damage on both the inner and outer walls due to the effects of environmental factors and the contents stored in the long-term operation of the domed roof storage tank,the study of magnetic flux leakage detection technology for the domed roof of these storage tanks was carried out.A three-dimensional model for magnetic flux leakage detection of the tank dome was built,and finite element analysis was employed to solve this model.The influence of different influencing factors on the characteristics of magnetic flux leakage signal was analyzed,and the influence of different influencing factors on the leakage magnetic field of the tank dome defect was obtained by fitting the peak value of the leakage magnetic field.The results show that the peak value of the magnetic flux leakage detection signal for outer wall hemispherical defects aligns linearly with the defect radius,while for inner wall hemispherical defects,it follows a quadratic fitting curve.The magnetic flux leakage detection signal generated at the reinforcement ribs has a waveform opposite to that of the defect detection signal.Laboratory experiments on magnetic flux leakage detection of the tank domed roof show that this method can effectively detect defects on the domed roof of storage tanks,as well as ascertain the depth and location of these defects.关键词
拱顶储罐罐顶/漏磁检测/有限元分析/曲率半径/加强肋Key words
domed roof storage tank/magnetic flux leakage detection/finite element analysis/radius of curvature/reinforcing rib分类
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杨志军,赵亚忠,蒙昌彭,张博文..拱顶储罐罐顶缺陷漏磁检测技术研究[J].压力容器,2024,41(4):1-8,42,9.基金项目
国家市场监督管理总局科技计划项目(2022MK162) （2022MK162）
浙江省市场监督管理局科技计划项目(20200119) （20200119）
