Author(s)

B. Alzahabi

Abstract

Cylindrical shells are widely used in many structural designs, such as offshore structures, liquid storage tanks, submarine hulls, and airplane hulls. Most of these structures are required to operate in a dynamic environment. The acoustic signature of submarines is very critical in such a high performance structure. Submarines are not only required to sustain very high dynamic loadings at all times, but must also be able to maneuver and perform their functions under the sea without being detected by sonar systems. Reduction of sound radiation is most efficiently achieved at the design stage, and the acoustic signatures may be determined by considering operational scenarios and modal characteristics. The acoustic signature of submarines is generally of two categories: broadband which has a continuous spectrum; and a tonal noise which has discrete frequencies. Therefore

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