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Surface-Impedance Boundary Conditions in Time-Domain Finite-Element Calculations Using the Magnetic-Vector-Potential Formulation

机译:使用磁矢量势公式的时域有限元计算中的表面阻抗边界条件

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摘要

The authors propose a novel time-domain extension of the well-known frequency-domain surface-impedance method in computational magnetodynamics. Herein, the 1-D eddy-current problem in a massive conducting region (semi-infinite slab) is considered via a number of exponentially decreasing trigonometric basis functions that cover the relevant skin-depth (or frequency) range of the application at hand. The method is elaborated for the 3-D magnetic-vector-potential formulation and is applied to a simple 2-D test case. Results are shown to converge well to those obtained with an accurate brute-force finite-element (FE) model.
机译:作者提出了在计算磁动力学中众所周知的频域表面阻抗方法的新型时域扩展。在此,通过大量指数递减的三角函数来考虑大面积导电区域(半无限平板)中的一维涡流问题,这些函数涵盖了手头应用的相关趋肤深度(或频率)范围。该方法针对3-D磁矢量势公式进行了详细阐述,并应用于简单的2-D测试用例。结果表明,该结果很好地收敛于使用精确的蛮力有限元(FE)模型获得的结果。

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