Title: The influence of the notches on the natural frequencies
Authors: Dekýš, Vladimír
Kopas, Peter
Mazúr, Ján
Malcho, Milan
Citation: Applied and Computational Mechanics. 2007, vol. 1, no. 1, p. 21-28.
Issue Date: 2007
Publisher: University of West Bohemia
Document type: článek
URI: http://www.kme.zcu.cz/acm/old_acm/full_papers/acm_vol1no1_p003.pdf
ISSN: 1802-680X (Print)
2336-1182 (Online)
Keywords: přirozená frekvence;metoda konečných prvků;funkce frekvenční odezvy
Keywords in different language: natural frequency;finite element method;frequency response function
Abstract: The simplification of the FEM model (the missing of a notch or a crack) generally means the modification of the natural frequencies. An analysis of these changes is matter of this paper. The direct and semicircle notches were made on the testing specimens (by cut depth in the specimens) and the naturals frequencies were measured and computed. The results are compared. In the paper is discussed the choice of the FEM element for FEM model and the comparison with experiment is made too. The influence of the crack on the natural frequencies is discussed in the case of specimen for high cycle fatigue test. The changes of the first three frequencies are compared for specimens with and without crack.
Rights: © 2007 University of West Bohemia. All rights reserved.
Appears in Collections:Volume 1, number 1 (2007)
Volume 1, number 1 (2007)

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