Friction coefficient influence in a flexible pipe: A macroelement model

被引：2
作者：
Provasi R. [1 ]
Toni F.G. [2 ]
de Arruda Martins C. [2 ]
机构：
[1] University of São Paulo, Department of Structural and Geotechnical Engineering, Avenida Professor Almeida Prado, Trav. 2, No. 83, SP, São Paulo
[2] University of São Paulo, Department of Mechanical Engineering, Avenida Professor Mello Moraes, No. 2231, SP, São Paulo
来源：
Ocean Engineering | 2022年 / 266卷
基金：
巴西圣保罗研究基金会;
关键词：
Flexible pipe; Friction coefficient; Frictional contact; Macroelements;
D O I：
10.1016/j.oceaneng.2022.112719
中图分类号：
学科分类号：
摘要：
Flexible pipes are structures responsible for several operations in offshore playing a vital role and hold immense importance in oil extraction. Modelling such pipes is not trivial, due to its layered structure. The helical wounded wires layers, which are responsible for handling axial loads, present a challenge in modelling in special. Another important factor for consideration are layer interactions, since they play a major role in pipe behavior. To obtain the pipe response under various loads, the authors proposed the macroelement model: a finite element model in which elements take profit of the problem geometrical characteristics, simplifying the meshing process and contact treatment, while reducing memory use and processing time. The present article is an excerpt of this research line and focuses on the understating of the frictional behavior in layer interactions by studying a flexible pipe. The model considers all the previous developed elements to simulate a four-layered flexible pipe, consisting of two tensile armor layers and two cylindrical ones. The loading considered is pressure combined with either tension or compression and the effects of the friction coefficient are investigated. Results: are compared to classical finite element for validation, showing excellent agreement, differences in performance and efficiency are highlighted. © 2022 Elsevier Ltd
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