NUMERICAL ASPECTS FOR FREE-VIBRATION OF THICK PLATES - PART II - NUMERICAL EFFICIENCY AND VIBRATION FREQUENCIES

A concise formulation and an efficient method of solution for free vib ration of thick, shear deformable plates have been presented in Part I of this paper. An efficient numerical algorithm is developed here and executed on various computational platforms. Numerical results show t hat, upon classifying the symmetries of vibration modes, as much as 40 % to 65% of the execution time can be saved for single symmetry classi fication; and as much as 45% to 85% of the execution time can be saved for double symmetry classification, while maintaining the same level of accuracy. In addition, memory requirements can be considerably redu ced. A set of comprehensive frequency parameters is presented and the frequency trend is discussed. The conclusion is reached that the trans verse-dominant vibration frequencies are dependent on plate thickness while the inplane-dominant vibration frequencies are insensitive to va riations in thickness. (C) 1998 Elsevier Science S.A.