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Hydrodynamic Response of A Fully Coupled TLP Hull-TTR System with detailed Modeling of A Hydraulic Pneumatic Tensioner and Riser Joints

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China Ocean Engineering 2022年第3期36卷 451-463页

作者： HAO Shuai YU Yang YU Jian-xing YUAN Zhi-ming XU Li-xin Maritime College Tianjin University of TechnologyTianjin 300384China State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China Tianjin Key Laboratory of Port and Ocean Engineering Tianjin UniversityTianjin 300072China department of Naval Architecture Ocean&Marine EngineeringUniversity of StrathclydeGlasgow G40LZUK

Tension Leg Platform(TLP)in deepwater oil and gas field development usually consists of a hull,tendons,and top tension risers(TTRs).To maintain its top tension,each TTR is connected with a tensioner system to the hull.Owing to the complicated configuration of the tensioners,the hull and TTRs form a strong coupled system.Traditionally,some simplified tensioner models are applied to analyze the TLP structures.There is a large discrepancy between their analysis results and the actual mechanism behaviors of a tensioner.It is very necessary to develop a more detailed tensioner model to consider the coupling effects between TLP and TTRs.In the present study,a fully coupled TLP hull-TTR system for hydrodynamic numerical simulation is established.A specific hydraulic pneumatic tensioner is modeled by considering 4 cylinders.The production TTR model is stacked up by specific riser joints.The simulation is also extended to analyze an array of TTRs.different regular and irregular waves are considered.The behaviors of different cylinders are presented.The results show that it is important to consider the specific configurations of the tensioner and TTRs,which may lead to obviously different response behaviors,compared with those from a simplified model.

关键词： top tension riser(TTR) fully coupled hull-tendon-TTR-tensioner model hydraulic pneumatic tensioner hydrodynamic response 3d potential flow theory

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Coupled Analysis of Multi-body Motions in Offshore Connecting Process

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Journal of Shanghai Jiaotong university(Science) 2010年第2期15卷 178-182页

作者：谭振东张宇王广东 Military Transportation Institute of the General Logistics department School of Management Tianjin University

The coupled dynamic responses of two pontoons while connecting with each other in irregular waves are calculated by means of 3d potential flow theory. The computation is used to find the optimal status for connecting at certain sea state. On the basis of the relative motion of two pontoons in irregular waves,visual FORTRAN programming language,as well as open graphics library (OpenGL),is used to develop a set of virtual reality system,which is fully interactive and with realistic effect. The transfinite interpolation scheme is applied for the mesh generating of the wave surface,and the wave motion is simulated by surface elevation,which is calculated by 3d potential flow theory.

关键词： dynamic response 3d potential flow theory irregular waves simulation

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