, Volume 17, Issue 6, pp 422-438

Determination of the orthotropic plate parameters of stiffened plates and grillages in free vibration

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It is well known that the analysis of vibration of orthogonally stiffened rectangular plates and grillages may be simplified by replacing the actual structure by an orthotropic plate. This needs a suitable determination of the four elastic rigidity constants D x, D y, D xy, D 1 and the mass \(\bar \rho \) of the orthotropic plate. A method is developed here for determining these parameters in terms of the sectional properties of the original plate-stiffener combination or the system of interconnected beams. Results of experimental work conducted on aluminium plates agree well with the results of the theory developed here.