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

Table 2

Natural frequencies of rectangular plate on different M and N (Hz).

Mode	M = N = 8	M = N = 10	M = N = 12	M = N = 14	M = N = 16
1	26.84	26.84	26.84	26.84	26.84
2	33.28	33.16	33.15	33.15	33.15
3	73.23	73.07	73.05	73.04	73.02
4	74.80	74.75	74.74	74.74	74.74
5	110.11	110.06	110.06	110.06	110.05
6	127.47	127.15	127.10	127.08	127.04
7	130.13	130.02	130.00	129.99	129.97
8	150.54	149.23	149.21	149.21	149.21
9	180.91	180.35	180.27	180.23	180.19
10	204.87	201.37	201.25	201.21	201.16