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

Table 1

Coupling parameters of ring-stiffened cylindrical shell.

Shell	Length L (m)	1.284
	Radius R (m)	0.18
	Thickness h (m)	0.003
	Rib height hr (m)	0.011
	Rib width br (m)	0.00621
	Number and type of ribs	N = 19, external rib
Shell material	Density	7850
	Poisson’s ratio	0.3
	Elastic modulus E (Pa)
Fluid	Density	1025
	Sound velocity )	1460