Title :
Nonlinear optimization of the shape function in the finite element method when determining cutoff frequencies of waveguides of arbitrary cross section
Author :
Utjes, J.C. ; Sarmiento, G. Sanchez ; Laura, P.A.A.
Author_Institution :
Empresa Nucl. Argentina de Centrales Electricas, Buenos Aires, Argentina
fDate :
1/1/1988 12:00:00 AM
Abstract :
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
Keywords :
eigenvalues and eigenfunctions; finite element analysis; optimisation; waveguide theory; FEM; arbitrary cross section; cardiodal cross section; computer time reduction; cutoff frequencies; eigenvalue problems; finite element method; k optimization process; nonlinear optimisation; shape function; waveguides; Approximation methods; Cardiology; Computer errors; Cutoff frequency; Eigenvalues and eigenfunctions; Finite element methods; Moment methods; Optimization methods; Shape; Upper bound;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
