Singular Perturbation Analysis of Large-Diameter and Thin-Wall Pipeline During Ultra-Deep S-lay Installation

doi:10.3969/j.issn.1000-565X.2015.06.018

Journal of South China University of Technology (Natural Science Edition) ›› 2015, Vol. 43 ›› Issue (6): 116-121.doi: 10.3969/j.issn.1000-565X.2015.06.018

• Mechanics • Previous Articles Next Articles

Singular Perturbation Analysis of Large-Diameter and Thin-Wall Pipeline During Ultra-Deep S-lay Installation

Han Qiang Wang Zhi-gang Zhang Yong-qiang Tao Xu

School of Civil Engineering and Transportation，South China University of Technology，Guangzhou 510640，Guangdong，China

Received:2014-07-03 Revised:2015-03-17 Online:2015-06-25 Published:2015-05-04
Contact: 韩强(1963-)，男，教授，博士生导师，主要从事非线性力学研究． E-mail:emqhan@scut.edu.cn
About author:韩强(1963-)，男，教授，博士生导师，主要从事非线性力学研究．
Supported by:
Supported by the National Natural Science Foundation of China(11132002)

Abstract

Abstract: In this paper，the analytical solution of the pipeline during ultra-deep S-lay installation was obtained based on the theory of singular perturbation． Then，the effects of tension，water depth and current force on the pipeline's configuration and bending moment were investigated． Moreover，a numerical simulation of the pipeline installation was conducted by means of the finite element method，and the results were compared with the theoreti-cal singular perturbation solution． Theoretical results show that (1) a suitable increase in tension is good for the installation because it makes the pipeline configuration more flat; (2) deep water may result in steep configuration and large moment peak near the seabed，which is harmful to the pipeline installation; and (3) the current force has the same effect on the pipeline installation when it is opposite to the forward direction．

Key words: S-lay, thin-wall pipeline, singular perturbation, analytical solution, finite element method

Han Qiang Wang Zhi-gang Zhang Yong-qiang Tao Xu. Singular Perturbation Analysis of Large-Diameter and Thin-Wall Pipeline During Ultra-Deep S-lay Installation[J]. Journal of South China University of Technology (Natural Science Edition), 2015, 43(6): 116-121.

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Singular Perturbation Analysis of Large-Diameter and Thin-Wall Pipeline During Ultra-Deep S-lay Installation

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