Development of a very fast simulator for pulsed eddy current testing signals of local wall thinning
Development of a very fast simulator for pulsed eddy current testing signals of local wall thinning
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DOI：
10.1016/j.ndteint.2012.06.002
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发表时间：
2012-10-01
影响因子：
4.2
通讯作者：
Uchimoto, Tetsuya
中科院分区：
文献类型：
--
作者：
Xie, Shejuan;Chen, Zhenmao;Uchimoto, Tetsuya
通过在基于傅立叶级数和插值的脉冲涡流检测（PECT）信号仿真程序中引入数据库型单频问题快速仿真方案，开发了一种用于体积缺陷PECT信号仿真的快速数值求解器。首先，简要描述了基于傅里叶级数方案和插值方法的PECT信号仿真方法。然后，一个数据库类型的快速数值求解器的单频Ea问题的傅立叶级数为基础的PECT模拟，以提高模拟效率。为了科普三维局部壁薄缺陷的快速ECT信号模拟问题，提出了一种二维平移对称方案，用于平板和直管几何形状的检测目标，以减少建立无缺陷场数据库所需的计算负担，这是快速ECT信号模拟所必需的。利用这些策略，一个非常快速的数值求解器的局部减薄的PECT信号的模拟，其有效性进行了验证，通过比较其数值结果与实测PECT信号和那些使用常规的数值代码模拟。(C)2012爱思唯尔有限公司保留所有权利。
A very fast numerical solver is developed for simulation of pulsed eddy current testing (PECT) signals caused by volumetric defects by introducing a database-type fast eddy current testing (ECT) simulation scheme for single frequency problems to the Fourier-series and interpolation-based PECT signal simulation code. First, the PECT signal simulation method based on a Fourier series scheme and an interpolation approach is briefly described. Then, a database-type fast numerical solver for single frequency Ea problems is introduced to the Fourier-series-based PECT simulation to enhance simulation efficiency. To cope with fast PECT signal simulation of 3D local wall thinning defects, a 2D shifting symmetry scheme is proposed for inspection targets of both plate and straight pipe geometries to reduce the computational burden required to establish databases of the unflawed field, which are necessary for fast ECT signal simulation. Using these strategies, a very fast numerical solver is developed for simulation of PECT signals of local wall thinning, and its validity is verified by comparing its numerical results with measured PECT signals and with those simulated using a conventional numerical code. (C) 2012 Elsevier Ltd. All rights reserved.