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논문 기본 정보

자료유형
학술저널
저자정보
Li, Tongtong (Institute for Ocean Engineering, China University of Petroleum) Duan, Menglan (Institute for Ocean Engineering, China University of Petroleum) Liang, Wei (College of Mechanical and Transportation Engineering, China University of Petroleum) An, Chen (Institute for Ocean Engineering, China University of Petroleum)
저널정보
테크노프레스 Ocean systems engineering Ocean systems engineering 제6권 제4호
발행연도
2016.1
수록면
363 - 375 (13page)

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Large numbers of submarine pipelines are laid as the world now is attaching great importance to offshore oil exploitation. Free spanning of submarine pipelines may be caused by seabed unevenness, change of topology, artificial supports, etc. By combining Iwan's wake oscillator model with the differential equation which describes the vibration behavior of free-span submarine pipelines, the pipe-fluid coupling equation is developed and solved in order to study the effect of both internal and external fluid on the vibration behavior of free-span submarine pipelines. Through generalized integral transform technique (GITT), the governing equation describing the transverse displacement is transformed into a system of second-order ordinary differential equations (ODEs) in temporal variable, eliminating the spatial variable. The MATHEMATICA built-in function NDSolve is then used to numerically solve the transformed ODE system. The good convergence of the eigenfunction expansions proved that this method is applicable for predicting the dynamic response of free-span pipelines subjected to both internal flow and external current.

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