“…The efficiency of the present Ritz approach can be observed by the maximum time taken for an analysis using 100 shape functions along both the directions, approximately equal to 0.75 s. Conversely, the results reported in Ref. [23] using modified characteristic functions (MCF) and orthogonal polynomials (OP) require computational times which are several order of magnitudes higher. This discrepancy, partly due to the smaller amount of RAM memory used in the computations of Ref.…”