Research Article

Vibration Characteristics of Ring-Stiffened Functionally Graded Circular Cylindrical Shells

Table 7

Variation of natural frequencies against circumferential wave number , type II FG cylindrical shell with nickel ring stiffeners ( , , , ).

5 0

126.83125.86426.17626.25126.33526.49826.66326.76826.798
230.39729.28929.64729.73229.83030.01630.20430.32430.359
347.19245.49446.04446.17646.32546.61146.89747.08247.135
482.41679.47180.42680.65580.91481.40881.90482.22582.317
5131.10126.42127.94128.30128.71129.50130.28130.80130.94
6191.52184.69186.90187.43188.03189.18190.33191.08191.29
7263.21253.82256.87257.60258.42260.00261.58262.60262.90
8346.02333.69337.69338.65339.73341.80343.88345.22345.61
9439.88424.20429.29430.51431.89434.52437.15438.87439.36
10544.74525.34531.64533.15534.85538.11541.37543.49544.10