Electrical and Computer Engineering, Center for Nondestructive Evaluation (CNDE)
Journal or Book Title
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
The eddy current non-destructive evaluation (NDE) modelling using Stratton-Chu formulation-based fast algorithm is analysed. Stratton-Chu formulations, which have no low frequency breakdown issue, are selected for modelling electromagnetic NDE problems with low frequency and high conductivity approximations. As the main contribution of this article, the robustness and efficiency of the approximations, which result in big savings in both memory and CPU time, are validated and analysed using examples from practical EC testing. The boundary element method (BEM) is used to discretize the integral equations into a linear system of equations: the first order Rao-Wilton-Glisson (RWG) vector basis functions with the flat triangle meshes of the object and pulse basis functions are selected to expand the equivalent surface currents and the normal component of magnetic fields, respectively. Then the multilevel adaptive cross approximation (MLACA) algorithm is applied to accelerate the iterative solution process. The performance and efficiency of adaptively applying a multi-stage (level) algorithm based on the criteria concluded for the operators are shown.
Bao, Yang and Song, Jiming, "Analysis of electromagnetic NDE modelling using Stratton-Chu formulations based fast algorithm" (2020). Electrical and Computer Engineering Publications. 258.