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An interpolating element-free Galerkin scaled boundary method applied to waveguide eigenvalue problem

delete2025-05-09
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陈莘莘 封面图
陈莘莘 (Shenshen Chen)
H
Haoyu Zhang
Q
Qinghua Li
X
Xing Wei
DOI:10.1016/j.advengsoft.2025.103923delete
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摘要

摘要

En 中文
本文描述了一种高效的半解析技术——插值无单元伽辽金缩放边界法(IEFG-SBM),用于求解波导特征值问题。采用加权余量法,结合缩放坐标与笛卡尔坐标之间的坐标变换,将波导特征值问题的控制偏微分方程转化为一组与波数域动态刚度矩阵相关的一阶常微分方程。通过使用连分数技术并引入辅助变量,推导出关于波导截止波数的广义特征值方程。仅需一组边界散射节点,并采用改进的插值移动最小二乘法(IIMLS)构造周向方向上的形函数。IIMLS方法避免了奇异权函数的使用,其形函数具有δ函数性质。数值算例表明,所提出的方法在较少节点下实现了高计算精度,有效处理复杂几何形状。
Keyword:
Scaled boundary method
Element-free Galerkin method
Continued fraction
Waveguide
Eigenvalue

期刊

Advances in Engineering Software 封面图
Advances in Engineering Software
IF:
5.7
论文数:
3.4K
被引数:
1.2W

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