Abstract
Deepwater deployment of offshore structures in different sea states was investigated. The whole deployment system was modeled as a lumped mass model, and discretization scheme for cable geometry and methodology for calculating the internal and external force acting on deploying cable were presented. The deployment model suitable for the time-varying length of deploying cable was specified. The free-surface flow fields together with the ship motions were used to calculate dynamic tension in the deploying cable during deployment of the structure. The deployment of deep sea mining system which was a typical subsea working system was employed. Based on lumped mass analysis model and parameters of deep sea mining system, numerical simulations were performed, and dynamic load and dynamic amplification factor (DAF) with different cable parameters, deploying velocities and sea states were obtained. It is shown that cable parameters and amplitudes of ocean waves can significantly influence the dynamic load and DAF, and the time-varying natural period of deploying system is a dominant factor, while the effect of deploying velocity is not obvious.
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WANG A-lan, YANG Yun, ZHU Shao-hua, LI Huai-liang, XU Jing-kuo, HE Min. Latest progress in deepwater installation technologies [C]// Proceedings of the Twenty-second International Offshore and Polar Engineering Conference. Rhodes, Greece, 2012: 1079–1090.
HU Xiao-zhou, LIU Shao-jun. Numerical simulation of calm water entry of flatted-bottom seafloor mining tool [J]. Journal of Central South University of Technology, 2011, 18(3): 658–665.
DNV-RP-H103. Recommended practice: Modeling and analysis of marine operations [S]. Oslo, Norway: DET NORSKE VERITAS (DNV), 2011.
GE L, BHALLA K, STAHL M. Operation integrity evaluations for deepwater drilling riser system [C]// Proceedings of the ASME 29th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2010). Shanghai, China, 2010: 473–479.
JACOBSEN T, LEIRA B J. Numerical and experimental studies of submerged towing of a subsea template [J]. Ocean Engineering, 2012, 42: 147–154.
NESTEGARD A, BOE T. Dynamic forces during deepwater lifting operations [C]// Proceedings of the Twentieth International Offshore and Polar Engineering Conference. Beijing, China, 2010: 500–507.
NIEDZWECKI J M, THAMPI S K. Snap loading of marine cable systems [J]. Applied Ocean Research, 1991, 13(1): 2–11.
DRISCOLL F R, NAHON M, LUECK R G. Development and validation of a lumped-mass dynamics model of a deep-sea ROV system [J]. Applied Ocean Research, 2000, 22(3): 169–182.
BUCKHAM B, NAHON M, SETO M, ZHAO X, LAMBERT C. Dynamics and control of a towed underwater vehicle system. Part I: Model development [J]. Ocean Engineering, 2003, 30(4): 453–470.
PENG Liang-bin, SIMA Can, LIU Jian-hu. Motion characteristics of underwater lifting operation [J]. Journal of Ship Mechanics, 2009, 13(6): 942–954. (in Chinese)
TANG You-gang, ZHANG Ruo-yu, CHENG Nan, ZHAO Jing-rui. Analysis of snap tension of deep water mooring with lumped mass method [J]. Journal of Tianjin University, 2009, 42(8): 695–701. (in Chinese)
ZHU Ke-qiang, ZHENG Dao-chang, CAI Ying, YU Chun-ling, WANG Rong, LIU Yong-lin, ZHANG Feng. Nonlinear hydrodynamic response of marine cable-body system under random dynamic excitations [J]. Journal of Hydrodynamics: Ser B, 2009, 21(6): 851–855.
LI Yan. Dynamic analysis of 1000 m ocean pilot mining system based on three-dimensional discrete element method pipe model [D]. Changsha, China: Central South University, 2009. (in Chinese)
HU Xiao-zhou, LIU Shao-jun, DU Bin. Development of dynamics model of seafloor mining system and analysis of influence factors in the deploying process [C]// Proceedings of the Eighth ISOPE Ocean Mining Symposium. Chennai, India, 2009: 246–254.
ROTI I. Sea state limitations for the deployment of subsea compression station modules [D]. Trondheim, Norway: Norwegian University of Science and Technology, 2012.
QUEAU L M, KIMIAEI M, RANDOLPH M F. Dynamic amplification factors for response analysis of steel catenary risers at touch down areas [C]// Proceedings of the Twenty-first International Offshore and Polar Engineering Conference. Maui, Hawaii, USA, 2011: 1–8.
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Foundation item: Project(51305463) supported by the National Natural Science Foundation of China
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Hu, Xz., Liu, Sj. Numerical simulation of deepwater deployment for offshore structures with deploying cables. J. Cent. South Univ. 22, 922–930 (2015). https://doi.org/10.1007/s11771-015-2602-y
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DOI: https://doi.org/10.1007/s11771-015-2602-y