Full wave modeling of ultrasonic NDE benchmark problems using Nyström method
Full wave modeling of ultrasonic NDE benchmark problems using Nyström method
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使用 Nyström 方法对超声 NDE 基准问题进行全波建模
DOI：
10.1063/1.4974727
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发表时间：
2017
影响因子：
--
通讯作者：
R. Roberts
中科院分区：
文献类型：
--
作者：
P. Gurrala;Kun;Jiming Song;R. Roberts
本文采用基于超声散射边界积分方程精确解的全波仿真模型，对世界无损评估中心联合会（WFNDEC）提出的一些基准问题进行了仿真。以前对这些问题建模的大部分工作都依赖于Kirch-hoff近似来从缺陷中找到散射场。在这里，我们使用一种称为Nystrom方法的数值方法，通过求解散射的边界积分方程来更准确地找到散射场。我们将模型的预测与测量和基于基尔霍夫近似的模型进行比较。我们期望所提出的结果作为我们的模型的验证，以及Kirchhoff近似和Nystrom方法之间的比较。
In this paper, we simulate some of the benchmark problems proposed by the World Federation of Nondestructive Evaluation Centers (WFNDEC) using a full wave simulation model based on accurate solutions to the boundary integral equations for ultrasonic scattering. Much of the previous work on modeling these problems relied on the Kirch-hoff approximation to find the scattered fields from defects. Here we instead use a numerical method, called the Nystrom method, for finding the scattered fields more accurately by solving the boundary integral equations of scattering. We compare our model’s predictions with both measurements and Kirchhoff approximation based models. We expect the presented results to serve as a validation of our model as well as a comparison between the Kirchhoff approximation and the Nystrom method.