Investigation on Free Vibration of Rotating Cylindrical Shells with Variable Thickness

Table 3

DFP of forward wave for the RCS.

	n	Saito and Endo [27]	Present
			nmax = 8	nmax = 9	nmax = 10	nmax = 11	nmax = 12	nmax = 13
0.0025	2	0.05593	0.05589	0.05587	0.05587	0.05586	0.05586	0.05586
	3	0.11155	0.11160	0.11160	0.11160	0.11159	0.11159	0.11159
	4	0.21078	0.21080	0.21080	0.21080	0.21080	0.21080	0.21080
	5	0.34033	0.34032	0.34031	0.34031	0.34031	0.34031	0.34031
0.0050	2	0.05460	0.05413	0.05410	0.05410	0.05409	0.05409	0.05409
	3	0.11058	0.11057	0.11057	0.11057	0.11056	0.11056	0.11056
	4	0.21018	0.21017	0.21016	0.21016	0.21016	0.21016	0.21016
	5	0.33997	0.33993	0.33993	0.33993	0.33992	0.33992	0.33992

Note. nmax is the number of truncation terms and b and f represent the backward and forward waves, respectively.