Study on the Coupling Frequency of Double-Sided Submerged Ring-Stiffened Cylindrical Shells

Table 2

Natural frequencies of double-sided water immersion bare cylindrical shell.

Modal order	Computational results (Hz)	COMSOL’s results (Hz)	Error %
(1, 2)	74.4	74.7	−0.40
(1, 3)	83.8	84.5	−0.83
(1, 4)	157.8	158.2	−0.25
(2, 3)	166.3	169.0	−1.60
(2, 4)	188.4	190.9	−1.31