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Experimental and numerical study on coupled motion responses of a floating crane vessel and a lifted subsea manifold in deep water

Authors
Nam, B. W.Kim, N. W.Hong, S. Y.
Issue Date
9월-2017
Publisher
SOC NAVAL ARCHITECTS KOREA
Keywords
Coupled motion; Crane vessel; Subsea manifold; Model test; Lifting operation
Citation
INTERNATIONAL JOURNAL OF NAVAL ARCHITECTURE AND OCEAN ENGINEERING, v.9, no.5, pp 552 - 567
Pages
16
Journal Title
INTERNATIONAL JOURNAL OF NAVAL ARCHITECTURE AND OCEAN ENGINEERING
Volume
9
Number
5
Start Page
552
End Page
567
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/564
DOI
10.1016/j.ijnaoe.2017.01.002
ISSN
2092-6782
2092-6790
Abstract
The floating crane vessel in waves gives rise to the motion of the lifted object which is connected to the hoisting wire. The dynamic tension induced by the lifted object also affects the motion responses of the floating crane vessel in return. In this study, coupled motion responses of a floating crane vessel and a lifted subsea manifold during deep-water installation operations were investigated by both experiments and numerical calculations. A series of model tests for the deep-water lifting operation were performed at Ocean Engineering Basin of KRISO. For the model test, the vessel with a crane control system and a typical subsea manifold were examined. To validate the experimental results, a frequency domain motion analysis method is applied. The coupled motion equations of the crane vessel and the lifted object are solved in the frequency domain with an additional linear stiffness matrix due to the hoisting wire. The hydrodynamic coefficients of the lifted object, which is a significant factor to affect the coupled dynamics, are estimated based on the perforation value of the structure and the CFD results. The discussions were made on three main points. First, the motion characteristics of the lifted object as well as the crane vessel were studied by comparing the calculation results. Second, the dynamic tension of the hoisting wire were evaluated under the various wave conditions. Final discussion was made on the effect of passive heave compensator on the motion and tension responses. Copyright (C) 2017 Society of Naval Architects of Korea. Production and hosting by Elsevier B.V.
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친환경해양개발연구본부 (심해공학연구센터)
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