Nonlinear optimization of the shape function in the finite element method when determining cutoff frequencies of waveguides of arbitrary cross section

Nonlinear optimization of the shape function in the finite element method when determining cutoff frequencies of waveguides of arbitrary cross section

The authors studied the k optimization process of the finite-element method when solving eigenvalue problems. The optimization process is then applied to the determination of the fundamental cutoff frequency of a waveguide of cardiodal cross section. It is shown that a considerable reduction in comp...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 1988-01, Vol.36 (1), p.151-152
Hauptverfasser: Utjes, J.C., Sarmiento, G.S., Laura, P.A.A.
Format: Artikel
Sprache:eng
Schlagworte:
Approximation methods
Cardiology
Computer errors
Cutoff frequency
Eigenvalues and eigenfunctions
Finite element methods
Moment methods
Optimization methods
Shape
Upper bound
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Zusammenfassung:The authors studied the k optimization process of the finite-element method when solving eigenvalue problems. The optimization process is then applied to the determination of the fundamental cutoff frequency of a waveguide of cardiodal cross section. It is shown that a considerable reduction in computer memory and/or CPU time is achieved by this process.< >
ISSN:0018-9480
1557-9670
DOI:10.1109/22.3496