Time Period of the Vibration of the Circular Plate with Circular Variation Both in Thickness and Density

Table 3

Time period of clamped and simply supported circular plates vs. nonhomogeneity .

Clamped	0.0	0.040 91	0.108 30	0.319 34	0.050 53	0.138 73	0.417 61
	0.2	0.040 40	0.106 16	0.314 57	0.049 93	0.136 12	0.411 11
	0.4	0.039 86	0.103 94	0.309 72	0.049 30	0.133 40	0.404 51
	0.6	0.039 27	0.101 62	0.304 82	0.048 63	0.130 56	0.397 82
	0.8	0.038 65	0.099 20	0.299 86	0.047 91	0.127 60	0.391 03
Simply supported	0.0	0.047 09	0.117 64	0.473 88	0.064 27	0.150 46	0.581 89
	0.2	0.045 79	0.115 31	0.464 45	0.062 65	0.147 22	0.570 48
	0.4	0.044 40	0.112 88	0.454 87	0.060 95	0.143 85	0.558 80
	0.6	0.042 88	0.110 33	0.445 07	0.059 08	0.140 33	0.546 92
	0.8	0.041 20	0.107 64	0.435 08	0.057 03	0.136 63	0.534 83