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research-article

Modeling Approach of Hydro-pneumatic Tensioner for Top Tensioned Riser

[+] Author and Article Information
Baiquan Chen

State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, 300350, China; Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiaotong University, Shanghai 200240, China
cbq_tju@163.com

Jianxing Yu

State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China; Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiaotong University, Shanghai 200240, China
yjx2000@tju.edu.cn

Yang Yu

State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, 300350, China; Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiaotong University, Shanghai 200240, China
yang.yu@tju.edu.cn

Lixin Xu

State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China
lixin.xu@tju.edu.cn

Han Wu

State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China
wuhan@imech.ac.cn

Zhenmian Li

State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China
lizhenmian@tju.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4040241 History: Received January 22, 2018; Revised May 06, 2018

Abstract

A three-dimensional (3D) finite element analysis (FEA) model of top tensioned riser (TTR) with hydro-pneumatic tensioner is proposed in this work. Firstly, the tension calculation equation of the hydro-pneumatic system is derived and the kinematic relationship of the platform-tensioner-riser system is established. Secondly, a 3D FEA model is established based on the FEA code ABAQUS, considering the actual riser string configuration and the Christmas tree. At last, three kinds of tensioner models, i.e. a constant vertical tension model, a linear spring-damper model and a nonlinear spring-damper model, are compared and analyzed in this study. Results show that the constant vertical tension model is not recommended as it cannot to reflect the actual tension of tensioner and the response of TTR. The linear model is applicable when the environmental condition is relatively mild, but it is strongly recommended to use the nonlinear model especially in the harsher environmental conditions.

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