In-Plane Vibration Analysis of Square Plate with Multiple Cutouts

Table 2

The natural frequencies of rectangular plates with different numbers of cutouts.

Mode number	Four cutouts		Six cutouts		Eight cutouts
	Present	FEM	Present	FEM	Present	FEM
1	66.72	65.89	65.83	64.82	61.98	60.22
2	73.12	72.44	70.20	69.26	68.06	67.46
3	82.20	81.17	80.98	80.09	77.34	76.69
4	112.67	112.27	106.26	104.93	105.11	104.26
5	115.98	114.90	110.62	109.76	108.71	108.02
6	124.18	123.65	124.10	123.45	123.54	123.13
7	129.35	128.39	124.90	123.95	127.59	126.77
8	142.90	142.33	131.99	130.20	134.41	132.93
9	145.65	147.60	146.08	144.14	140.94	139.80
10	148.51	148.65	148.39	145.82	144.77	143.28
20	193.18	192.46	198.62	196.93	190.12	188.69
50	299.04	296.67	290.72	289.92	290.88	289.78
100	410.74	408.81	404.63	403.36	401.95	400.77