Prof. habil. dr. Rimantas Barauskas
Kauno Technologijos Universitetas, Informatikos fak.
Taikomosios informatikos katedra

Obtaining simplified finite element models by minimization of residuals of static and dynamic responses
Rimantas Barauskas, Vidmantas Rimavičius.

The study deals with the problem aming to formaly reduce a complex finite element structural model to a simpler one. As a sample task, the reduction of a girder model to the simpler equivalent membrane model has been investigated. The coincidence of model displacements at given loading condirtions is employed as a criterion of mutual adequacy of the two models. Both static and dynamic displacements at selected reference points have been used in the expression of the penalty-type target function, the minimum of wich indicates the best fit between the original and reduced models. The target function has been minimized by using the geometrical and physical parameters of a typical membrane element as optimization variables. The calculations have been performed in MATLAB environment. The validity of obtained parameters of the membrane model has been tested by investigate the original and reduced structures of different geometrical shapes at complex loadings
PublikacijaInformation Technologies' 2008 : proceedings of the 14th International Conference on Information and Software Technologies, IT 2008, Kaunas, Lithuania, April 24-25, 2008, 2008, p. 131-136
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