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Frequency Changes in Thin Rectangular Plates due to Geometrical Discontinuities. Part I: Finite Element Analysis

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Author(s): Tufoi Marius | Hatiegan Cornel | Gilbert-Rainer Gillich | Carla Protocsil | Ionică Negru

Journal: Analele Universităţii Eftimie Murgu Reşiţa. Fascicula de Inginerie
ISSN 1453-7397

Volume: XX;
Issue: 3;
Start page: 221;
Date: 2013;
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Keywords: defect | finite element analysis | plate | natural frequency | vibration mode shapes

ABSTRACT
This paper series presents an analysis regarding the dynamics of thin rectangular plates, embedded on all edges, in order to highlight the effect of geometrical discontinuities upon the natural frequencies. In this paper the first thirty natural frequencies were obtained for a plate without defect and the same plate with six different types of defect. The defect was placed in the centre of the plate; one dimension (the width) was increased successively. The results in terms of frequencies and mode shapes are finally presented.
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