Free Vibration of Annular Circular Plates Based on Higher-Order Shear Deformation Theory: A Spline Approximation Technique

Table 1

Comparison of natural frequency parameter (rad/s) of the present study with Hashemi et al. [53], Duan et al. [54], and Liu et al. [55] of simply supported annular circular plates .

Circumferential node number	Modes	Present	Hashemi et al. [53] exact sol.	Duan et al. [54] FSDT	Liu et al. [55] FEM
1	1	1583	1584.65	1583	1551
	2	5436	5437.61	5433	5328
	3	11494	11495.1	11478	11283
2	1	2307	2308.11	2306	2260
	2	6474	6475.13	6468	6348
	3	12652	12653.2	12632	12428