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研究蒸汽发生器传热管支撑结构处磨损的涡流检测并讨论三角形磨损及四边形磨损的涡流数据分析方法,同时应用涡流数据分析方法及模型计算对磨损的深度、长度、位置及体积损失量进行测量或计算,最后利用CIVA仿真平台对3种不同伤深的磨损进行仿真模拟研究。结果表明,涡流信号对支撑结构处的磨损形态有较好的指示。即可通过低频绝对通道混频Lissajous图的Y轴分量判断磨损的具体形态;在此基础上通过建立的计算模型并结合数据分析,计算磨损缺陷的体积损失量。CIVA仿真模拟结果与实际检测数据相符,当缺陷为规则、标准的人工缺陷时,模拟数据的幅值-伤深曲线为线性方程。
The eddy current testing for the wear of the heat transfer tube support structure of the steam generator was studied. The eddy current data analysis method of the triangle wear and the quadrilateral wear was also discussed. Meanwhile, the eddy current data analysis method and model calculation were used to measure the depth, length, position and volume loss Or calculated. Finally, the simulation study of three different wear depths was conducted by using CIVA simulation platform. The results show that the eddy current signal has a good indication of the wear pattern at the support structure. The specific shape of wear can be judged by mixing the Y-axis component of the Lissajous diagram with the low-frequency absolute channels. Based on this, the volume loss of the wear defect can be calculated through the established calculation model and data analysis. The simulation results of CIVA are consistent with the actual test data. When the defect is a regular and standard artificial defect, the amplitude-depth curve of the simulated data is a linear equation.