Framework for Dynamic-Stiffness-Based Free Vibration Analysis of Plate-Like Structures

Table 2

Dimensionless frequencies ω = ωa (ρ(1 − ν²)/E)^1/2 of stepped concrete isotropic CSFS plates (h₁/a = 0.05, h₂/a = 0.03).

Mode	CLPT	FSDT	HSDT	Abaqus
1	0.1287	0.1498	0.1498	0.1499
2	0.2319	0.2525	0.2525	0.2526
3	0.3320	0.4679	0.4680	0.4684
4	0.5518	0.5453	0.5453	0.5454
5	0.6122	0.6277	0.6277	0.6281
6	0.6373	0.7749	0.7750	0.7756