Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2022 , Vol. 56 >Issue 9: 1247 - 1255

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2021.144

Naval Architecture, Ocean and Civil Engineering

Bending Properties of Unbonded Flexible Risers with Composite Materials

Expand
  • 1. State Key Laboratory of Ocean Engineering
    2. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai 200240, China

Received date: 2021-04-30

  Online published: 2022-10-09

Fold

Abstract

Unbonded flexible risers are widely applied to transport oil and gas resources from seabed to platform, and composite cylindrical layers are sometimes contained due to design requirements. Based on an 8-layer unbonded flexible riser model, the bending properties of the unbonded flexible risers with composite cylindrical layers are studied. A theoretical method of combining axisymmetric and bending loads acting on unbonded flexible risers is proposed, and a numerical method with detailed geometric characteristics taken into account is established for verification. The influence of two typical composite materials as well as the fibre volume fraction on the bending properties of the unbonded flexible risers is analyzed. The theoretical and the numerical results are in good agreement, which shows that the bending properties of the unbonded flexible risers are greatly affected by the axial Young’s modulus of the composite cylindrical layers, and composite material with larger axial Young’s modulus would greatly enhance the bending stiffness of the unbonded flexible risers, expecially in the full-slipping stage. In addition, the axial tensile stiffness and bending stiffness of full-slipping stage are proportional to the fibre volume fraction of the composite cylindrical layers.

Key words： unbonded flexible risers; composite materials; cylindrical layers; bending stiffness; fibre volume fraction

Cite this article

LIU Qingsheng, XUE Hongxiang, YUAN Yuchao, TANG Wenyong . Bending Properties of Unbonded Flexible Risers with Composite Materials[J]. Journal of Shanghai Jiaotong University, 2022 , 56(9) : 1247 -1255 . DOI: 10.16183/j.cnki.jsjtu.2021.144

References

[1] 余荣华, 袁鹏斌. 海洋非粘结型柔性软管的性能结构及其研究热点[J]. 油气储运, 2016, 35(12): 1255-1260.
[1] YU Ronghua, YUAN Pengbin. Structure and research focus of marine unbonded flexible pipes[J]. Oil & Gas Storage and Transportation, 2016, 35(12): 1255-1260.
[2] EPSZTEIN T, DEMANZE F, LEFEBVRE X, et al. New anti H2S layer for flexible pipes[C]// Offshore Technology Conference. Houston, USA: OTC, 2011.
[3] MALTA E R, MARTINS C D A. Finite element analysis of flexible pipes under compression[C]// International Conference on Ocean, Offshore and Arctic Engineering. San Francisco, USA: ASME, 2014.
[4] 任少飞, 唐文勇, 薛鸿祥. 非黏结柔性立管骨架层失效数值计算方法[J]. 上海交通大学学报, 2016, 50(3): 466-471.
[4] REN Shaofei, TANG Wenyong, XUE Hongxiang. Numerical method to predict failure of carcass layer of unbonded flexible risers[J]. Journal of Shanghai Jiao Tong University, 2016, 50(3): 466-471.
[5] ELIZBAR K. Theoretical modelling of unbonded flexible pipe cross-sections[D]. London: South Bank University, 2000.
[6] KRAINCANIC I, KEBADZE E. Slip initiation and progression in helical armouring layers of unbonded flexible pipes and its effect on pipe bending behaviour[J]. The Journal of Strain Analysis for Engineering Design, 2001, 36(3): 265-275.
[7] DONG L L, HUANG Y, ZHANG Q, et al. An analytical model to predict the bending behavior of unbonded flexible pipes[J]. Journal of Ship Research, 2013, 57(3): 171-177.
[8] FÉRET J J, BOURNAZEL C L. Calculation of stresses and slip in structural layers of unbonded flexible pipes[J]. Journal of Offshore Mechanics and Arctic Engineering, 1987, 109(3): 263-269.
[9] KEBADZE E, KRAINCANIC I. Non-linear bending behaviour of offshore flexible pipes[C]// International Offshore and Polar Engineering Conference. Brest, France: ISOPE, 1999: 226-233.
[10] RAMOS R J, PESCE C P. A consistent analytical model to predict the structural behavior of flexible risers subjected to combined loads[J]. Journal of Offshore Mechanics and Arctic Engineering, 2004, 126(2): 141-146.
[11] RAMOS R, PESCE C P, MARTINS C A. A new analytical expression to estimate the bending stiffness of flexible risers[C]// International Conference on Offshore Mechanics and Arctic Engineering. Honolulu, USA: ASME, 2009: 513-522.
[12] MAGLUTA C, ROITMAN N, VIERO P F, et al. Experimental estimation of physical properties of a flexible riser[C]// International Conference on Offshore Mechanics and Arctic Engineering. Rio de Janeiro, Brazil: ASME, 2001: 255-264.
[13] TROINA L M B, ROSA L F L, VIERO P F, et al. An experimental investigation on the bending behaviour of flexible pipes[C]// International Conference on Offshore Mechanics and Arctic Engineering. Honolulu, USA: ASME, 2009: 637-645.
[14] WITZ J A. A case study in the cross-section analysis of flexible risers[J]. Marine Structures, 1996, 9(9): 885-904.
[15] 刘晓媛, 薛鸿祥, 唐文勇. 轴向承载力作用下非粘结柔性立管的侧向失效分析[J]. 上海交通大学学报, 2018, 52(9): 1017-1022.
[15] LIU Xiaoyuan, XUE Hongxiang, TANG Wenyong. Lateral failure analysis of unbonded flexible risers under axial compression force[J]. Journal of Shanghai Jiao Tong University, 2018, 52(9): 1017-1022.
[16] ZHANG M M, CHEN X Q, FU S X, et al. Theoretical and numerical analysis of bending behavior of unbonded flexible risers[J]. Marine Structures, 2015, 44: 311-325.
[17] LIU Q S, XUE H X, TANG W Y, et al. Theoretical and numerical methods to predict the behaviour of unbonded flexible riser with composite armour layers subjected to axial tension[J]. Ocean Engineering, 2020, 199: 107038.
[18] 朱彦聪. 钢丝缠绕增强塑料复合管外压失稳研究[D]. 杭州: 浙江大学, 2007.
[18] ZHU Yancong. Buckling analysis of plastic pipe reinforced by winding steel wires under external pressure[D]. Hangzhou: Zhejiang University, 2007.
[19] 董磊磊. 非粘合柔性立管截面特性的理论计算及BSR区域的疲劳分析[D]. 大连: 大连理工大学, 2013.
[19] DONG Leilei. Theoretical prediction of cross-sectional properties and fatigue analysis in the BSR area for unbonded flexible risers[D]. Dalian: Dalian University of Technology, 2013.
[20] CHAKRABARTI S K, FRAMPTON R E. Review of riser analysis techniques[J]. Applied Ocean Research, 1982, 4(2): 73-90.
[21] SEYED F B, PATEL M H. Mathematics of flexible risers including pressure and internal flow effects[J]. Marine Structures, 1992, 5(2/3): 121-150.
[22] ALI B. Development of a constitutive model to simulate unbonded flexible riser pipe elements[D]. London: Brunel University, 2008
[23] 庄茁, 张帆, 岑松, 等. ABAQUS非线性有限元分析与实例[M]. 北京: 科学出版社, 2005.
[23] ZHUANG Zhuo. Nonlinear finite element analysis and examples of ABAQUS[M]. Beijing: Science Press, 2005.
[24] 王人杰. 纤维增强复合材料横向弹性常数[J]. 复合材料学报, 1996, 13(2): 98-104.
[24] WANG Renjie. Transverse elastic constants for fiber reinforced composite materials[J]. Acta Materiae Compositae Sinica, 1996, 13(2): 98-104.
Options
Outlines

/

〈 〉