Free Vibration Analysis of Arbitrary-Shaped Plates Based on the Improved Rayleigh–Ritz Method

Table 10

Natural frequencies of the elliptical thin plate under the simply supported boundary condition (Hz).

Mode	Simply supported
	Present	FEM	Error (%)
1	16.45	16.49	0.22
2	29.45	29.51	0.22
3	47.69	47.90	0.44
4	57.29	57.84	0.95
5	71.60	72.00	0.56
6	78.19	78.70	0.65
7	101.01	101.91	0.87
8	103.05	104.13	1.03
9	121.99	123.09	0.89
10	133.40	134.59	0.88