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A study on the design and manufacture of a deep-sea unmanned underwater vehicle based on structural reliability analysis

Authors
Joung, T.-H.Sammut, K.He, F.Nho, I.-S.Lee, J.-H.Kim, B.-J.Han, S.-H.Park, S.-H.Lee, C.-M.Lee, P.-M.
Issue Date
2006
Keywords
AFOSM (Advanced First-Order Second Moment); Limit tolerance; Pressure vessel; Reliability analysis; RSM (Response Surface Method); UUV (Unmanned Underwater Vehicle)
Citation
Proceedings of the International Offshore and Polar Engineering Conference, pp 197 - 204
Pages
8
Journal Title
Proceedings of the International Offshore and Polar Engineering Conference
Start Page
197
End Page
204
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9012
ISSN
1098-6189
Abstract
The reliability analysis tool provided with the commercial structure-analysis package, ANSYS 9.0, is relatively easy to use and allows solutions to be obtained comparatively rapidly. However, the tool can not guarantee the results of the reliability analysis since it can only provide an outline tendency of the probability of failure without giving an accurate numerical value of the probability of failure at the regions that a designer requires. The independent commercial reliability analysis code, NESSUS 7.0, also has problems in that it may not necessarily converge and can waste computation time from having to undertake unnecessary repetitive structure analyses for design variables that have little significance to the structural integrity of the object being designed. A design methodology and a software module, which can make up for the current deficiencies in these commercial packages, have been developed by the authors and are presented in this paper. This paper describes how the methodology and the software module were applied to the design and manufacture of a stiffened pressure vessel, which can be mounted on a 6000m-class deep-sea unmanned underwater vehicle (UUV). Copyright ? 2006 by The International Society of Offshore and Polar Engineers.
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