Uncertainty Analysis in Lorentz Force Eddy Current Testing
Uncertainty Analysis in Lorentz Force Eddy Current Testing
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DOI：
10.1109/tmag.2015.2480046
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发表时间：
2016-03
影响因子：
2.1
通讯作者：
K. Weise;M. Carlstedt;M. Ziolkowski;H. Brauer
中科院分区：
文献类型：
--
作者：
K. Weise;M. Carlstedt;M. Ziolkowski;H. Brauer
本文介绍了洛伦兹力涡流检测技术在无损检测中的不确定度分析。为了量化多个未知输入参数的影响，采用了非侵入式广义多项式混沌展开。在此背景下，通过实验确定了样品的速度和电导率以及永磁体的剩磁和提离距离的统计量，并将其建模为β分布和均匀分布的随机变量。将计算结果与蒙特卡罗模拟结果进行了比较，误差为0.2%。此外，对数值预测的力分布进行了实验验证。通过Sobol分解进行的灵敏度分析表明，剩磁和升空距离对所得到的洛伦兹力分布的总方差的贡献率超过90%，应该首先考虑这些因素，以提高重复性。
The paper addresses the analysis of uncertainties in the framework of the nondestructive evaluation technique Lorentz force eddy current testing. A non-intrusive generalized polynomial chaos expansion is used in order to quantify the impact of multiple unknown input parameters. In this context, the statistics of the velocity and the conductivity of the specimen as well as the magnetic remanence and the lift-off distance of the permanent magnet are determined experimentally and modeled as β-distributed and uniform distributed random variables. The results are compared with Monte Carlo simulations and showed errors <;0.2%. Furthermore, the numerically predicted force profiles are validated with experiments. A sensitivity analysis by means of the Sobol decomposition revealed that the magnetic remanence and the lift-off distance contribute to more than 90% of the total variance of the resulting Lorentz force profile and should be considered first to improve reproducibility.