Analysis of the free vibration of rectangular plates with central cut-outs using the discrete Ritz method

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Detail(s)

Original languageEnglish
Pages (from-to)941-959
Journal / PublicationInternational Journal of Mechanical Sciences
Volume45
Issue number5
Publication statusPublished - May 2003

Abstract

We present an analysis of the free vibration of plates with internal discontinuities due to central cut-outs. A numerical formulation for a basic L-shaped element which is divided into appropriate sub-domains that are dependent upon the location of the cut-out is used as the basic building element. Trial functions formed to satisfy certain boundary conditions are employed to define the transverse deflection of each sub-domain. Mathematical treatments in terms of the continuities in displacement, slope, moment, and higher derivatives between the adjacent sub-domains are enforced at the interconnecting edges. The energy functional results, from the proper assembly of the coupled strain and kinetic energy contributions of each sub-domain, are minimized via the Ritz procedure to extract the vibration frequencies and mode shapes of the plates. The procedures are demonstrated by considering plates with central cut-outs that are subjected to two types of boundary conditions. © 2003 Elsevier Ltd. All rights reserved.

Research Area(s)

  • Cut-out, Free vibration, Orthogonal polynomials, Perforated plates, Ritz method

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