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《Journal of Ship Mechanics》 2010-06
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Vessel Motion Effects on Nonlinear Dynamics of Deepwater Drilling Riser

WANG Teng,ZHANG Xiu-zhan,ZHU Wei-quan (Department of Offshore Engineering,China University of Petroleum,Dongying 257061,China)  
A time domain computer model for deepwater drilling riser subjected to waves,ocean currents and vessel motion was developed in this paper.The vessel motions effects on the dynamic response of deepwater riser are investigated,including mean offsets,wave frequency motions,low frequency motions,period and amplitude of the motion.The results show that vessel motion has an important effect on the dynamic response of deepwater riser,and lead to an increase of upper maximum bending moment by 59% compared to the case without vessel motion,under random waves and current.The mean vessel offset has main effect on lower maximum bending moment.Wave frequency motion has notable effect on the upper maximum bending moment of the drilling riser,and changed sharply with amplitude or period of the wave frequency motion decreasing.Low frequency motion mainly affects the upper maximum bending moment of the drilling riser.
【Fund】: Supported by a grant from the National Hi-Tech "863" Plan Fund(2006AA09A106)
【CateGory Index】: U661.3;U674.381
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