Abstract: This paper presents a new method for the free vibration analysis of thick rectangular plates based on Mindlin shear deformation theory.The proposed method introduces DSC delta sequence kernels as basis functions and takes the advantage of the pb-2 Rayleigh-Ritz boundary function to arrive at a new version Ritz method.The performance of the proposed method is carefully validated by convergence and comparison analyses.Numerical results indicate that the proposed method is very effcient and accurate.The freque...