Frequency Domain Spectral Element Model for the Vibration Analysis of a Thin Plate with Arbitrary Boundary Conditions

Table 2

Comparison of the natural frequencies (Hz) of a square plate with free-clamped-free-clamped (F-C-F-C) edge support obtained by ANSYS [21], FEM [22], and SEM.

Mode	ANSYS	FEM			SEM
					1
		297	7497	29997	792
1	5.441	5.454	5.442	5.441	5.441
2	6.449	6.453	6.449	6.448	6.448
3	10.66	10.58	10.65	10.66	10.66
4	15.02	15.09	15.02	15.02	15.02
5	16.45	16.48	16.44	16.44	16.44
6	19.57	19.36	19.56	19.57	19.57
7	21.43	21.19	21.42	21.43	21.43
8	29.50	29.69	29.50	29.50	29.50
9	30.47	29.78	30.44	30.47	30.47
10	31.06	31.20	31.06	31.06	31.06

Note: : total number of finite elements; : total number of degrees of freedom.