Free In-Plane Vibration Analysis of Circular, Annular, and Sector Plates Using Isogeometric Approach

Table 3

Comparison of frequency parameters for annular plates with various boundary conditions.

	Mode	FF			FC			CC
		Ref. [19]	Ref. [20]	Present	Ref. [19]	Ref. [20]	Present	Ref. [19]	Ref. [20]	Present
0.2		1.156	1.155	1.156	1.472	1.473	1.472	1.947	1.963	1.947
		2.688	2.687	2.680	2.311	2.313	2.310	2.840	2.870	2.840
		0.777	0.777	0.777	1.786	1.788	1.472	2.363	2.374	2.363
		1.681	1.680	1.683	2.762	2.765	2.762	3.050	3.066	3.050
		1.449	1.450	1.449	2.580	2.584	2.580	2.845	2.857	2.844
		2.379	2.379	2.380	3.399	3.364	3.399	3.571	3.582	3.570
		1.936	1.935	1.936	3.296	3.301	3.296	3.359	3.366	3.358
		3.070	3.069	3.067	4.123	4.130	4.123	4.200	4.051	4.199
0.4		1.177	1.177	1.177	1.761	1.764	1.761	2.399	2.418	2.399
		2.829	2.829	2.828	2.454	2.458	2.454	3.712	3.743	3.713
		0.504	0.504	0.505	1.904	1.913	1.903	2.814	2.831	2.814
		1.715	1.714	1.714	2.901	2.905	2.901	3.715	3.741	3.716
		1.132	1.133	1.132	2.248	2.252	2.249	3.293	3.314	3.293
		2.341	2.340	2.272	3.497	3.501	3.496	3.931	3.953	3.931
		1.736	1.736	1.736	2.767	2.770	2.767	3.699	3.750	3.699
		2.957	2.956	2.953	4.109	4.115	4.109	4.400	4.416	4.399