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Investigation on natural modes of floating structures considering design strength

Authors
Kim, B.W.Sung, H.G.Hong, S.Y.
Issue Date
2009
Citation
Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE, v.4, no.PART A, pp 361 - 368
Pages
8
Journal Title
Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Volume
4
Number
PART A
Start Page
361
End Page
368
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/8928
DOI
10.1115/OMAE2009-79556
ISSN
0000-0000
Abstract
In this paper, influences of design strength on natural modes of floating structures are examined by analyzing natural frequencies and mode shapes of floating bodies with nonuniform stiffness. A FSRU (Floating Storage and Regasification Unit) is considered as an example structure. Natural modes such as natural frequencies and modes shapes are calculated by the subspace iteration method which is widely used as a solver of eigenvalue problem. Various numerical models of FSRU are considered. One is a simplified model of which stiffness is uniformly distributed. The other is a model with stepped distribution of stiffness. The third model has a triangular stiffness distribution. By comparing the results of each model, the influences of nonuniform strength distribution on natural modes are investigated. Copyright ? 2009 by ASME.
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친환경해양개발연구본부 (심해공학연구센터)
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