A Straightforward Updating Criterion for 2-D/3-D Hybrid Discontinuous Galerkin Time-Domain Method Controlling Comparative Error

A Straightforward Updating Criterion for 2-D/3-D Hybrid Discontinuous Galerkin Time-Domain Method Controlling Comparative Error
复制标题

控制比较误差的2-D/3-D混合间断伽辽金时域方法的直接更新准则

DOI:
10.1109/tmtt.2018.2801818
复制
发表时间:
2018-02
影响因子:
4.3
通讯作者:
Hu Jun
Hu Jun
中科院分区:
工程技术1区
文献类型:
--
作者:
Mai Wending;Li Ping;Li C G;Jiang Ming;Hao Wenqu;Jiang Lijun;Hu Jun

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2-D/3-D 混合不连续伽辽金时域 (DGTD) 方法可以有效地处理包含能够进行 2-D 简化的元素的结构。为了将 2D 元素与 3D 元素分开,需要近似误差处理的标准。然而,在最新报道的技术中,这种标准是从因果原理和Courant-Freidrichs-Lewy约束导出的,因此对于二维简化来说是间接的和无关紧要的。因此,一些能够进行 2D 简化的元素被不必要地标记为 3D 元素,从而显着降低了效率。此外,在控制绝对误差方面,传统准则对于模态分布复杂的结构来说不灵活。在本文中,提出了一种新颖的标准。与传统标准相比,这一新标准控制的是比较误差而不是绝对误差,从而提高了准确性和灵活性。此外,对于时间自适应更新算法,所提出的准则直接从DGTD方法的离散矩阵方程推导出来,使其简单高效。最后,采用所提出的准则的 2-D/3-D DGTD 与改进的节点分析技术相结合,用于分析带有去耦电容器的电源-接地板对。通过与商业软件和传统方法的比较,证明了所提出的标准的准确性、灵活性和效率提高。
The 2-D/3-D hybrid discontinuous Galerkin time-domain (DGTD) method is efficient to deal with structures that contain elements capable of 2-D simplification. To separate 2-D elements from 3-D ones, a criterion for approximation error manipulation is required. However, in the latest reported technique, this kind of criterion is derived from the causality principle and the Courant–Freidrichs–Lewy constraint, and thus is indirect and inessential to 2-D simplification. As a result, some elements capable of 2-D simplification are unnecessarily flagged as 3-D ones, deteriorating efficiency dramatically. Moreover, controlling absolute error, the traditional criterion is not flexible for structures with complex mode distribution. In this paper, a novel criterion is proposed. Compared with the traditional one, this new criterion controls comparative error instead of absolute error, thus enhancing accuracy and flexibility. Besides, for the time-adaptive updating algorithm, the proposed criterion is derived directly from the discretized matrix equations of the DGTD method, rendering it straightforward and efficient. Finally, the 2-D/3-D DGTD with the proposed criterion is integrated with the modified nodal analysis technique for the analysis of power-ground plate pairs with decoupling capacitors. The accuracy, flexibility, and efficiency enhancement of the proposed criterion are demonstrated by comparison with commercial software and the traditional method.
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