A Modified Fourier–Ritz Formulation for Vibration Analysis of Arbitrarily Restrained Rectangular Plate with Cutouts

Table 4

Frequency parameters of the structure with one cutout located inside of the plate under different kinds of boundary conditions.

Mode order		1	2	3	4	5	6	7	8
FFFF-FFFF	Present	3.904	4.815	10.977	11.171	15.429	18.809	19.560	22.139
	ANSYS	3.880	4.808	10.927	11.110	15.330	18.783	19.529	22.140
CFFF-FFFF	Present	0.634	2.710	4.004	8.997	11.299	16.489	17.105	21.917
	ANSYS	0.645	2.706	3.984	8.962	11.230	16.383	17.068	21.887
CCFF-FFFF	Present	3.183	6.898	13.680	16.725	21.370	24.889	29.914	39.087
	ANSYS	3.166	6.856	13.620	16.640	21.290	24.748	29.760	38.754
CSFF-FFFF	Present	1.572	5.839	11.533	13.173	17.061	24.273	26.066	36.552
	ANSYS	1.580	5.816	11.470	13.100	16.930	24.188	25.939	34.347