In-Plane Vibration Analysis of Square Plate with Multiple Cutouts

Table 4

The natural frequencies of the rectangular plates for different cutout positions.

Mode number	Inner cutouts		Edge cutouts		Corner cutouts
	ANSYS	Present	ANSYS	Present	ANSYS	Present
1	65.55	66.18	60.83	61.26	69.10	69.12
2	77.36	77.78	73.13	73.39	70.24	70.25
3	83.79	84.31	80.68	80.94	82.97	83.00
4	103.43	104.18	109.81	109.89	102.56	102.60
5	113.76	114.51	113.00	113.01	117.27	117.42
6	114.00	114.60	119.77	119.97	118.67	118.87
7	127.32	128.43	127.25	127.27	123.85	123.87
8	130.58	133.21	129.20	129.25	138.92	138.93
9	138.36	139.06	141.20	141.96	148.05	148.16
10	140.72	141.39	142.41	143.49	148.29	148.30
20	197.79	198.16	199.63	199.66	204.38	204.51
50	297.65	298.65	300.66	301.29	307.39	308.11
100	424.80	425.83	426.14	426.87	423.74	424.11