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Experimental Study on Behavior of Tandem and Side-by-side Moored Vessels

Authors
Hong, S.Y.Kim, J.H.Kim, H.J.Choi, Y.R.
Issue Date
2002
Keywords
Drift force; Helmholtz resonance; LNG FPSO; Motion; Multiple body interaction; Side-by-side mooring; Tandem mooring
Citation
Proceedings of the International Offshore and Polar Engineering Conference, v.12, pp 841 - 847
Pages
7
Journal Title
Proceedings of the International Offshore and Polar Engineering Conference
Volume
12
Start Page
841
End Page
847
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9129
ISSN
0000-0000
Abstract
Recently LNG FPSO is one of hot issues in offshore floating body dynamics, which requires accurate analysis of hydrodynamic interactions between two vessels; LNG FPSO and shuttle tanker. In many cases of conventional tandem mooring of FPSO and shuttle tanker, hydrodynamic interaction between FPSO and shuttle tanker was ignored under the assumption that the interactions are not so large to be accounted for. Such assumption implicitly presumed that ignorance of the hydrodynamic interaction gives conservative estimates of behaviors of both ships-FPSO and shuttle tanker. This paper aims to experimentally investigate basic interaction characteristics of tandem moored vessels and side-by-side moored vessels. Model tests were carried out for tandem moored tankers and side-by-side moored tankers in regular waves. Motion responses and drift forces of two vessels were measured and change of drift forces is mainly investigated. Interaction characteristics will also be investigated for change of distances between two vessels as well as types of mooring pattern; tandem and side-by-side moorings. All the cases of two-body interactions was compared with calculations using a higher-order boundary element method based on generalized multi-body interaction theory(Choi and Hong, 2001).
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