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Experimental and numerical analysis of installation process using dual floating crane vessel

Authors
Seo, M.G.Kim, N.Ha, Y.-J.Park, I.B.Nam, B.W.Lee, K.Sung, H.G.
Issue Date
2018
Publisher
International Society of Offshore and Polar Engineers
Keywords
Dual crane operation; Floating crane vessel; Line tension; Wave-induced motion
Citation
13th ISOPE Pacific/Asia Offshore Mechanics Symposium, PACOMS 2018, pp 421 - 425
Pages
5
Journal Title
13th ISOPE Pacific/Asia Offshore Mechanics Symposium, PACOMS 2018
Start Page
421
End Page
425
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/8420
ISSN
0000-0000
Abstract
In this study, installation process of pipe-type structure is conducted experimentally and numerically using dual floating crane vessels. Because installation structure is a long pipe, two crane vessels are required for the installation process. Two crane vessels are facing each other holding each end of the installation structure. In the experiment, two vessels are moored by soft spring, and various wave condition are considered. Measured items are 6DOF motions of two vessels and pipe, wire tensions at the end of the crane and mooring line tensions. In numerical analysis, motions of crane vessels are based on floating body dynamics using convolution integral, and crane wire is treated as simple spring. Installation structure is assumed as a rigid body with 6DOF motion. As in the experiment, numerical simulations in regular wave are performed. Characteristics of vessel motion and wire tension according to wave conditions are checked, and computation results are compared with experimental data. It was checked which frequency range is critical by reviewing the motions of dual crane vessels, and near the yaw motion resonance point of the pipe-type structure has the worst effect on crane vessel’s motion. Copyright ? 2018 by the International Society of Offshore and Polar Engineers
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Seo, Min Guk
친환경해양개발연구본부 (심해공학연구센터)
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