Analysis of Capability Requirement of Dynamic Positioning System for Cargo Transfer Vessel at Sea

Abstract

In response to the development of deep-sea oil and gas resources, which require a high degree of cooperation by crude oil transportation equipment, a new type of ship known as the cargo transfer vessel (CTV) has been developed. To provide a theoretical reference for the design and equipment of the CTV’s dynamic positioning system, in this paper, we take the new deepwater CTV as the study object and theoretically and numerically analyze its operation, wind load, current load, wave load, and navigational resistance in a range of Brazilian sea conditions with respect to its positioning and towing modes. We confirm that our proposed method can successfully calculate the total environmental load of the CTV and that the CTV is able to operate normally under the designed sea conditions.

Keywords

Cargo transfer vessel / Wind load / Current load / Wave load / DP capability / Oil transfer operation

References

[1] Bao WE (2018) Research on time domain analysis of dynamic positioning system for drilling platform. Master thesis, Jiangsu University of Science and Technology, Zhenjiang, 9–22. (in Chinese)

[2] Chen XB. Middle-field formulation for the computation of wave-drift loads. J Eng Math, 2007, 59(1): 61-82

[3] Do KD. Global robust and adaptive output feedback dynamic positioning of surface ships. J Mar Sci Appl, 2011, 10: 325-332

[4] Fossen TI. Guidance and control of ocean vehicles, 1994, New York: Wiley Press, 45-46

[5] Fu MY, Ding FG, Zhang WX. The ship capability calculation of a dynamic positioning system based on genetic algorithms. J Mark Q Publ Am Mark Assoc, 2010, 73(6): 920-925

[6] Kjerstad ØK, Skjetne R. Modeling and control for dynamic positioned marine vessels in drifting managed sea ice. Model Identif Control, 2014, 35(4): 249-262

[7] Li MX, Ren XL. Development of DP2 Marginal Oilfeld Shuttle Tankers. Guandong Shipbuilding, 2018, 37(5): 13-15+34 (in Chinese)

[8] Liang H, Li L, Ou J. Coupled control of the horizontal and vertical plane motions of a semi-submersible platform by a dynamic positioning system. J Mar Sci Technol, 2015, 20(4): 776-786

[9] Lin XG, Nie J, Jiao YZ. Nonlinear adaptive fuzzy output-feedback controller design for dynamic positioning system of ships. Ocean Eng, 2018, 158(15): 186-195

[10] Liu ZF, Sun Q, Liu CD. Thrust ability evaluation analysis of a dynamic positioning system. J Ship Mech, 2016, 20(5): 540-548 in Chinese)

[11] Mahfouz AB. Predicting the capability-polar-plots for dynamic positioning systems for offshore platforms using artificial neural networks. Ocean Eng, 2007, 34(8): 1151-1163

[12] Mahfouz AB, Eltahan HW. On the use of the capability polar plots program for dynamic positioning systems for marine vessels. Ocean Eng, 2006, 33(8): 1070-1089

[13] OCIMF Prediction of wind and current loads on VLCCs, 1994, London: Witherby $ CO.LTD, 37-51

[14] Sun LP, Liu Y, Li XP. DP3 capability analysis of a semisubmersible drilling platform. Shipbuild China, 2011, 52(4): 100-108 in Chinese)

[15] Tannuri EA, Morishita HM. Experimental and numerical evaluation of a typical dynamic positioning system. Appl Ocean Res, 2006, 28(2): 133-146

[16] Wang L, Yang JM, Xu SW. Dynamic positioning capability analysis for marine vessels based on a DPCap polar plot program. China Ocean Eng, 2018, 32(1): 90-98

[17] Wu D, Liu X, Ren F, Yin Z. An improved thrust allocation method for marine dynamic positioning system. Nav Eng J, 2016, 129(3): 35-44

[18] Xin H, Du J. Robust nonlinear control design for dynamic positioning of marine vessels with thruster system dynamics. Nonlinear Dynam, 2018, 94(1): 1-12

[19] Xu R, Wang Q, Song Y (2011) Study on ship dynamic positioning system’s thruster allocation based on genetic algorithm. International Conference on Information Science & Technology, IEEE, Beijing. https://doi.org/10.1109/ICIST.2011.5765191

[20] Xu SW, Wang L, Wang XF, Li B. Experimental evaluation on a newly developed dynamic positioning time domain simulation program. J Ship Mech, 2016, 20(6): 686-698

[21] Yang D (2018) Analysis on the marine traction positioning on the sea and the demand of the positioning capability. Master thesis, Harbin Engineering University, Harbin, 7–32. (in Chinese)

[22] Zhang BW, Yang H. Investigation on the methods used in the analysis of DP capability. Shipbuilding of China, 2009, 50(s): 205-214 (in Chineese)

[23] Zhang YF, Liu CD, Zhang FW, Wang ZP. Numerical evaluation on dynamic positioning for semisubmersible platform based on backstepping control. J Ship Mech, 2016, 20(12): 1547-1555

[24] Zhao W (2018) Research on optimal control of thrust and power distribution in offshore engineering ship. Ship Sci Technol 40(10):87–92. https://doi.org/10.3404/j.issn.1672-7649.2018.10.017

[25] Zhao DW, Ding FG, Tan JF (2010) Optimal thrust allocation based GA for dynamic positioning ship, International Conference on Mechatronics & Automation, IEEE, Xi’an. https://doi.org/10.1109/ICMA.2010.5589933