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Discussion on “Nonlinear vibration of simply supported rectangular cross-ply plates” by Gajbir Singh, K. Kanaka Raju, G. Venkateswara Rao and N.G.R. Iyengar [Journal of Sound and Vibration 142 (1990) 213–226]

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Adrian G. Radu

Editorial: Journal of Sound and Vibration, 330(11), p.2682–2689, 2011.


Large amplitude vibration of simply supported rectangular cross-ply plates paper of Singh et al. [1] is re-visited. One of the presented coefficients for simply supported boundary conditions, namely T8, is found to be erroneously determined. The observed error influences the nonlinear to linear frequency ratio results for the first mode of the simply supported cross-ply symmetric and anti-symmetric square and rectangular plates. The present computations are performed using MathCAD to solve the obtained improper integrals. However, the published results were not recovered even when considering the erroneous expression for T8 and therefore the numerical integration scheme has been validated for the current numerical development for the simply supported boundary condition case with unmovable edges. For these cases the results are found to be close to the published results in [1]. Although the source of the erroneous first mode results of the simply supported plates published in [1] could not be identified exactly, and cannot be identified without access to the original computer code, the fact that these results could not be recovered under the stated material and geometrical parameters is undoubtedly demonstrated.

Cuvinte cheie: Large amplitude vibration