Research Article

Vibration Analysis of Piezoelectric Composite Plate Resting on Nonlinear Elastic Foundations Using Sinc and Discrete Singular Convolution Differential Quadrature Techniques

Table 4

Comparison between the normalized frequencies , using DSCDQM-DLK, grid sizes N, and the previous exact and numerical frequencies for the simply supported square isotropic plate (2M + 1 = 5, , , , , and ).

Normalized frequencies
ResultsN

DSCDQM-DLK355.9524103.5119124.2142161.4660177.6126186.4932
556.0349103.6085124.3302161.5049177.6553186.5380
756.0320103.6031124.3237161.4964177.6444186.5266
956.0320103.6031124.3237161.4964177.6444186.5266
Analytical [68]56.0359
RHSDT [69]56.0310
NSDT [60]56.0311
Execution time (sec)5.611001 over N = 7 × 5 × 5