Uncertain eigenvalue analysis of the dielectric-filled waveguide by an interval vector finite element method
Uncertain eigenvalue analysis of the dielectric-filled waveguide by an interval vector finite element method
复制标题
介质填充波导的不确定特征值区间矢量有限元分析
DOI:
10.1007/s11431-021-1940-y
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发表时间:
2021-12
期刊:
影响因子:
--
通讯作者:
Z.Y. Yao
中科院分区:
文献类型:
--
作者:
Z.H. Wang;C. Jiang;B.Y. Ni;J.W. Li;J. Zheng;Z.Y. Yao
Eigenvalues of the dielectric-filled waveguide are of great importance to its transmission characteristic analysis and optimization design, which could be easily affected by spatially uncertain dielectric parameters. For the sake of quantifying their influence on eigenvalues of the dielectric-filled waveguide and overcoming the limitation of less samples, an interval vector finite element method (IVFEM) is proposed to acquire the lower and upper bounds of the eigenvalues with spatial uncertainty of the medium parameters Firstly, the uncertain dielectric material properties are described by the interval field model and the corresponding interval Karhunen-Loève (K-L) approximate method. Secondly, by inserting the interval uncertainties into the constitutive relationship of the standard generalized eigenvalue equations of the dielectric-filled waveguide, an interval standard generalized eigenvalue equation is then formulated. At last, the lower and upper bounds of the eigenvalues are calculated according to the first-order perturbation method, which can be used to estimate the transmission properties of the waveguide efficiently. Three kinds of the dielectric-filled waveguides are analyzed by the proposed IVFEM and verified by Monte Carlo simulation method.
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