In-Plane Vibration Analysis of Square Plate with Multiple Cutouts

Table 3

The natural frequencies of the rectangular plate with different cutout sizes.

Mode number	10 m ×  10 m		20 m ×  20 m		25 m ×  25 m
	FEM	Present	FEM	Present	FEM	Present
1	70.61	70.95	83.29	83.54	103.38	103.82
2	74.30	74.32	86.94	87.04	104.36	104.52
3	85.96	86.13	97.35	97.61	136.02	136.08
4	107.49	108.27	102.06	102.63	137.12	137.29
5	115.16	115.42	120.23	120.34	144.29	144.35
6	123.59	123.85	126.40	127.08	145.73	146.13
7	128.91	128.94	141.30	141.50	152.01	152.43
8	144.00	144.28	144.73	144.99	157.66	158.06
9	149.48	149.73	158.55	158.72	164.98	165.07
10	155.57	155.68	167.84	167.92	169.78	170.33
20	209.85	210.01	226.07	226.36	241.77	241.95
50	298.27	298.37	322.88	323.77	358.95	359.15
100	416.65	416.77	460.46	460.95	499.36	500.90