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

Table 3

Natural frequencies of the rectangular plate on different Q (Hz).

Mode	Q = 10	Q = 20	Q = 30	Q = 40	Q = 50
1	27.16	26.84	26.78	26.76	26.75
2	33.05	33.15	33.12	33.11	33.11
3	72.81	73.05	72.94	72.90	72.88
4	76.15	74.74	74.46	74.37	74.32
5	111.35	110.06	109.81	109.73	109.69
6	126.62	127.10	126.73	126.60	126.54
7	130.95	130.00	129.75	129.66	129.61
8	153.09	149.21	148.47	148.21	148.09
9	180.93	180.27	179.90	179.76	179.70
10	204.14	201.25	200.31	199.98	199.82