CAJ | 학술논문

角点条件是时域有限差分法(FDTD)的重要组成部分。提出了一种新的角点条件，其基本原理是：角点场值和角点附近其他节点场值存在一定的关系，利用线性插值可以找到这种关系，进而可以用角点附近其他节点场值计算角点场值。给出了二维和三维情形时的角点场值计算公式。这种角点条件的优点是公式简单，而且易于程序实现。数值实验表明这种角点条件的吸收效果和常用的 Mur角点条件的吸收效果非常接近。
각점조건시시역유한차분법(FDTD)적중요조성부분。제출료일충신적각점조건，기기본원리시：각점장치화각점부근기타절점장치존재일정적관계，이용선성삽치가이조도저충관계，진이가이용각점부근기타절점장치계산각점장치。급출료이유화삼유정형시적각점장치계산공식。저충각점조건적우점시공식간단，이차역우정서실현。수치실험표명저충각점조건적흡수효과화상용적 Mur각점조건적흡수효과비상접근。
The vertex condition is an important constituent part of the Finite Difference Time Domain(FDTD) method. A new vertex condition is brought forward. Its fundamental principle is that the field value of a vertex is relevant to the field values of the knots near the vertex,and the relationship equation about the field values can be obtained by using linear interpolation. Then the field value of the vertex can be calculated based on the field values of the knots near the vertex according to this relationship equation. The computational formulas of the field values of the vertexes are given for 2-D and 3-D cases. The advantages of the vertex condition are that the computational formulas are simple and can be programmed easily. The numerical experiments indicate that the absorbing effects of the vertex condition are very close to that of Mur vertex condition.