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

Table 7

Natural frequencies of the rectangular plate under the condition of two adjacent sides simply supported and others free (Hz).

Mode
	Present	Ref. [26]	Error (%)
1	3.367	3.370	0.077
2	17.321	17.321	0.003
3	19.297	19.293	0.021
4	38.222	38.203	0.049
5	51.061	51.032	0.057
6	53.509	53.497	0.022