Ring stiffened cylindrical shells are used in many structural applications, such as pressure vessels, submarine hulls, aircrafts, launch vehicles, and waterborne ballistic missiles. Most of these structures are required to operate while subjected to some form of dynamic loading and some of these can be quite severe. Submerged structures, such as submarines, torpedoes, and waterborne missiles, are all subjected to external pressure and are required to operate in a variety of environments where they can be subjected to different loads and conditions. Therefore, the analysis of the dynamic characteristics of these shells under external water pressure is crucial to ensure safe and successful designs. Therefore, in this research, we have considered their vibration analysis. To do this, we have considered the finite element method for vibration analysis of submerged structure and finally by using ANSYS software. We analyzed the free vibration of some models, which have been presented in some papers. After confirmation of the results, we have extended this method to analysis of imaginary submerged pressure hull of submarine.

1.
Ross
,
C. T. F.
, 2001,
Pressure Vessels: External Pressure Technology
,
Horwood
,
Chichester, UK
.
2.
Ross
,
C. T. F.
,
Emile
, and
Johns
,
T.
, 1987, “
Vibration of Thin Walled Domes Under External Water Pressure
,”
J. Sound Vib.
0022-460X,
114
, pp.
453
463
.
3.
Rojagopalan
,
K.
, 1992,
Finite Element Buckling Analysis of Stiffened Cylindrical Shells
,
A.A. Balkema
,
Rotterdam
, pp.
13
21
.
4.
Zienkiewicz
,
O. C.
, and
Newton
,
R. E.
, 1969, “
Coupled Vibrations of a Structure Submerged in a Compressible Fluid
,”
International Symposium on Finite Element Techniques
, University of Stuttgart.
5.
Ross
,
C. T. F.
, 1984,
Finite Element Programs for Axisymmetric Problems in Engineering
,
Ellis Horwood
,
Chichester
, pp.
126
138
.
6.
Ross
,
C. T. F.
, 1990,
Pressure Vessels Under External Pressure
,
Elsevier Applied Science
,
New York
, pp.
143
194
.
7.
Ross
,
C. T. F.
, and
Johns
,
T.
, 1992, “
Vibration of Circular Cylindrical Shells Under External Water Pressure
,”
J. Mech. Eng. Sci.
0022-2542,
206
, pp.
19
86
.
8.
Ross
,
C. T. F.
, 1996, “
Vibration and Elastic Instability of Thin-Walled Domes Under Uniform External Pressure
,”
Thin-Walled Struct.
0263-8231,
26
(
3
), pp.
159
177
.
9.
Ross
,
C. T. F.
, 1996, “
Vibration of Ring Stiffened Circular Cylinders Under External Water Pressure
,”
Comput. Struct.
0045-7949,
60
(
6
), pp.
1013
1019
.
10.
Ross
,
C. T. F.
,
Koster
,
P.
, and
Little
,
A.
, 2006, “
Vibration of Thin-Walled Prolated Dome Under External Water Pressure
,”
Ocean Eng.
0029-8018,
1
(
13
), pp.
560
575
.
11.
Ross
,
C. T. F.
,
Little
,
A. P. F.
,
Banks
,
J.
, and
Attanasio
,
D.
, 2004, “
Buckling of Ring Stiffened Domes Under External Hydrostatic Pressure
,”
Ocean Eng.
0029-8018,
31
, pp.
239
252
.
12.
Warburton
,
G. B.
, 1965, “
Vibration of Thin Cylindrical Shells
,”
J. Mech. Eng. Sci.
0022-2542,
7
, pp.
399
407
.
13.
Zienkiewicz
,
O. C.
, and
Taylor
,
R. L.
, 2000,
The Finite Element Method
,
Butterworth-Heinemann
,
Oxford
, pp.
468
572
.
14.
ANSYS 9.0 help system.
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