Seabed proximity effects on the wave-induced hydrodynamic forces on a submarine pipeline
Peng XF; Qi WG(漆文刚) ; Gao FP(高福平)
Source Publication Proceedings of the 12th ISOPE Pacific-Asia Offshore Mechanics Symposium, PACOMS 2016
Conference Name 12th ISOPE Pacific-Asia Offshore Mechanics Symposium, PACOMS 2016
Conference Date October 4, 2016 - October 7, 2016
Conference Place Gold Coast, QLD, Australia
Abstract Most existing studies on the submarine pipeline hydrodynamics are either for the pipes above the seabed or for those buried in the seabed. In this study, the seabed proximity effects on the wave-induced hydrodynamics of the pipes with typical relative locations are investigated experimentally in a large fluid-structure-soil interaction flume. Experimental results indicate that when the pipe is above the seabed, the inertial coefficient CMand upward lift coefficient CLTincrease with decreasing the gap-to-diameter ratios (e/D) for e/D > 0.5. With e/D decreasing from 1.0 to 0, the drag coefficient CDand downward lift coefficient CLTincrease gradually and reach their peak values at e/D≈0.l, then decrease as the pipe further approaching the seabed. When the pipe is buried in the seabed (e/D>0), the effect of inertia on the in-line force gets weaken. The maximum values of the downward and upward lift forces happen approximately under the wave crest and wave trough, respectively. Moreover, the pore pressure oscillation amplitudes increase on the upper-half segment of the pipe and decrease on its lower-half segment in comparison with those at the same depths in the far-field. Copyright © 2016 by the International Society of Offshore and Polar Engineers.
Indexed By EI
Document Type 会议论文
Recommended Citation GB/T 7714
Peng XF,Qi WG,Gao FP. Seabed proximity effects on the wave-induced hydrodynamic forces on a submarine pipeline[C]Proceedings of the 12th ISOPE Pacific-Asia Offshore Mechanics Symposium, PACOMS 2016,2016.
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