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http://dx.doi.org/10.5916/jkosme.2009.33.1.175

Vibration Analysis of Water-loaded Cylindrical Array Structures  

Shin, Chang-Joo (부산대학교 기계공학부 소음진동실험실)
Hong, Chin-Suk (부산대학교 기계공학부)
Jeong, Weui-Bong (부산대학교 기계공학부)
Seo, Hee-Seon (국방과학연구소)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.33, no.1, 2009 , pp. 175-182 More about this Journal
Abstract
This paper summarizes a solution procedure for a large cylindrical structure mounted underneath a ship as a sonar. Vibration analysis of the water loaded structure is required to enhance the structural reliability as well as acoustic performance of the sonar. It is, however, often very difficult to solve such structures since they have many DOFs, considering the frequency of interest and the water-loading. The mode mapping method is proposed and verified to take into account the water-loading with the minimum DOF for the analysis. The cyclic symmetric method is then reviewed to show how the eigen properties of the full model can be obtained from the representative segment model. The solution procedure is finally proposed and applied successfully for a simplified water-loaded cylindrical array structure.
Keywords
Cylindrical array structure; Cyclic symmetric method; Mode mapping method; Finite element method; Boundary element method; Water loading effect;
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