Premium
Three‐dimensional vibration analysis of rectangular thick plates on Pasternak foundation
Author(s) -
Zhou D.,
Cheung Y. K.,
Lo S. H.,
Au F. T. K.
Publication year - 2004
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.915
Subject(s) - ritz method , boundary value problem , vibration , mathematics , mathematical analysis , chebyshev polynomials , eigenvalues and eigenvectors , parametric statistics , elasticity (physics) , square (algebra) , foundation (evidence) , vibration of plates , plate theory , displacement (psychology) , structural engineering , geometry , materials science , engineering , physics , psychology , statistics , archaeology , quantum mechanics , composite material , psychotherapist , history
The free‐vibration characteristics of rectangular thick plates resting on elastic foundations have been studied, based on the three‐dimensional, linear and small strain elasticity theory. The foundation is described by the Pasternak (two‐parameter) model. The Ritz method is used to derive the eigenvalue equation of the rectangular plate by augmenting the strain energy of the plate with the potential energy of the elastic foundation. The Chebyshev polynomials multiplied by a boundary function are selected as the admissible functions of the displacement functions in each direction. The approach is suitable for rectangular plates with arbitrary boundary conditions. Convergence and comparison studies have been performed on square plates on elastic foundations with different boundary conditions. It is shown that the present method has a rapid convergent rate, stable numerical operation and very high accuracy. Parametric investigations on the dynamic behaviour of clamped square thick plates on elastic foundations have been carried out in detail, with respect to different thickness–span ratios and foundation parameters. Some results found for the first time have been given and some important conclusions have been drawn. Copyright © 2004 John Wiley & Sons, Ltd.