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首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >Frequency and time domain electromagnetic scattering simulations employing higher order edge elements
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Frequency and time domain electromagnetic scattering simulations employing higher order edge elements

机译:使用高阶边缘元素的频域和时域电磁散射模拟

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摘要

Finite elements are often used for electromagnetic scattering simulations where the main goal is the accurate predicting of the radar cross section or scattering width output. Edge element discretizations are popular as they are known to eliminate the problems of spurious modes and allow the easy implementation of boundary conditions and material interfaces. This work employs a technique which uses higher order edge elements for scattering problems set in both the frequency and time domains, in three- and two-dimensions, respectively. Such approximations are attractive as they are known to give a higher level of accuracy for a given number of degrees of freedom, when compared to lower order approximations. Appropriate solution techniques are proposed for the system of linear equations which arises in each case. Numerical examples demonstrate the effectiveness of the proposed procedures.
机译:有限元通常用于电磁散射仿真,其主要目标是准确预测雷达横截面或散射宽度输出。边缘元素离散化很流行,因为它们可以消除杂散模式的问题,并可以轻松实现边界条件和材料界面。这项工作采用了一种技术,该技术将高阶边缘元素用于分别在三维和二维中在频域和时域中设置的散射问题。这样的近似是吸引人的,因为与低阶近似相比,它们对于给定的自由度可以提供更高的精度。针对每种情况出现的线性方程组,提出了适当的求解技术。数值例子证明了所提出程序的有效性。

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