Vibration Analysis and Optimization of a Rectangular Plate with Flanging Hyperellipse Cutout

Table 1

Influence of central cutout area on the first two frequencies of clamped-free plate.

a (mm)	b (mm)		Natural frequency (Hz)
			f1	f2
0	0	0	8.364	28.204
100	20	0.047	8.840	28.408
100	30	0.070	8.882	28.130
100	40	0.093	8.909	27.873
100	50	0.116	8.923	27.399
100	60	0.140	8.925	27.478
100	70	0.163	8.911	27.325
100	80	0.186	8.879	27.200
100	90	0.209	8.826	27.101