Study on Free-Standing Riser Under Different Working Conditions Based on 3D Co-Rotational Beam Element  

作　　者：HUANG Chen GU Ji-jun JIA Ji-chuan CHEN Lei-lei WANG Shu-jiang GAO Lei 

机构地区：[1]College of Mechanical and Transportation Engineering,China University of Petroleum-Beijing,Beijing 102200,China [2]School of Safety and Engineering,Xinjiang Institute of Engineering,Urumqi 830000,China [3]CNOOC Research Institute,Beijing 100028,China

出　　处：《China Ocean Engineering》2024年第5期725-738,共14页中国海洋工程（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.52271299).

摘　　要：When the free standing riser(FSR)is in service in the ocean,its mechanical properties are affected by various factors,including complex ocean current forces,buoyancy of the buoyancy can,and torque caused by the deflection of the upper floating body.These loads have a great influence on the deformation and internal force of the FSR.The static performance of FSR is investigated in this research under various working conditions.The finite element model of FSR is established based on the co-rotational method.The arc length approach is used to solve the model.The load is exerted in increments.The current load on the riser changes with the configuration of the riser.The accuracy of the numerical method is verified by Abaqus software.The calculation time is also compared.Then,the effects of uniform current,actual current and floating body yaw motion on FSR are studied by parameter analysis.Additionally,the influence of the FSR on the ocean current after the failure of part of the buoyancy can chamber is analyzed.The results show that the numerical model based on the co-rotational method can effectively simulate the large rotation and torsion behavior of FSR.This method has high computational efficiency and precision,and this method can quickly improve the efficiency of numerical calculation of static analysis of deep-water riser.The proposed technology may serve as an alternative to the existing proprietary commercial software,which uses a complex graphical user interface.

关 键 词：free standing riser(FSR) co-rotational method finite element method ocean current nonlinear analysis TORSION 

分 类 号：TE95[石油与天然气工程—石油机械设备] P756.2[天文地球—海洋科学]