Free and Forced Vibration Analysis of Airtight Cylindrical Vessels with Doubly Curved Shells of Revolution by Using Jacobi-Ritz Method

Table 2

Comparison of some frequency parameters for the ECE vessel and PCE vessel (, , , , and ).

Mode number		ECE vessel		PCE vessel
		Present	FEM	Present	FEM
0	1	0.27209	0.27203	0.25524	0.25520
	2	0.36257	0.36328	0.34346	0.34549
	3	0.45512	0.45653	0.46885	0.47130
	4	0.49345	0.49265	0.50378	0.50361
	5	0.52093	0.52117	0.52362	0.52489
1	1	0.20694	0.20708	0.06650	0.06619
	2	0.39073	0.39132	0.19918	0.19861
	3	0.51455	0.51439	0.34286	0.34208
	4	0.51863	0.51785	0.47787	0.47683
	5	0.55112	0.55172	0.58726	0.58442
2	1	0.04723	0.04754	0.04193	0.04231
	2	0.15759	0.15815	0.13737	0.13842
	3	0.28803	0.28890	0.23527	0.23682
	4	0.41272	0.41382	0.31923	0.31989
	5	0.52104	0.52222	0.41943	0.42089