THE METHOD OF DIRECT FINITE PERTURBATION OF NUMERICAL MODELS FOR STUDYING OF THE DYNAMIC, STIFFNESS AND STRENGTH PROPERTIES FOR THIN-WALLED ELEMENTS OF ENGINEERING CONSTRUCTIONS.
Abstract and keywords
Abstract (English):
The methods of direct perturbation for finite element models of thin-walled engineering constructions for sensitivity analysis of their strength, stiffness and dynamic characteristics to the change in their thickness are proposed. The approach for prediction of distribution for natural frequencies migration as result of change in their thickness are presented. The applicability of the linearized models to determine displacements, stresses and natural frequencies slightly thinned design compared to the nominal (original) are shown. The examples of test problems are given.

Keywords:
sensitivity, perturbation theory, the stress-strain state, the spectrum of natural vibration frequencies, the finite element method.
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References

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