0
Piper and Riser Technology

Numerical Model for Pipeline Laying During S-lay

[+] Author and Article Information
Feng Yuan

College of Civil Engineering and Architecture,  Zhejiang University, Yuhangtang Road 388, Hangzhou 310058, Zhejiang, Chinayuanfen5742@163.com

Zhen Guo

College of Civil Engineering and Architecture,  Zhejiang University, Yuhangtang Road 388, Hangzhou 310058, Zhejiang, Chinanehzoug@163.com

Lingling Li

College of Civil Engineering and Architecture,  Zhejiang University, Yuhangtang Road 388, Hangzhou 310058, Zhejiang, Chinalingzju@163.com

Lizhong Wang

College of Civil Engineering and Architecture,  Zhejiang University, Yuhangtang Road 388, Hangzhou 310058, Zhejiang, Chinawlzzju@163.com

J. Offshore Mech. Arct. Eng 134(2), 021703 (Dec 06, 2011) (9 pages) doi:10.1115/1.4004628 History: Received August 21, 2010; Revised March 31, 2011; Published December 06, 2011; Online December 06, 2011

The S-lay method has been widely used in pipeline installation from shallow water to deep water for decades. In this paper, a novel numerical model for analyzing pipelines in the S-lay problem is proposed to investigate the overall configuration, internal forces, and strain of the pipeline taking into account the influence of ocean currents and seabed stiffness. The influence of many important factors, including the variation position of the liftoff point, the change of stinger radius, ocean currents, seabed stiffness are investigated in detail. Some useful results are obtained: the stress state of the pipeline is found to vary greatly during the whole laying process; the train of the pipeline at both the upper and the lower sides is very important; ocean currents have negligible influence on the pipeline; traditional “touchdown factor” is not suitable to predict the real pipe embedment; and soil stiffness plays an important role in pipeline behavior on the seabed. The illustrative examples and comparison with a previous work demonstrate the widespread applicability of this model. Moreover, the solution process of this model is easy and fast, so it is suitable for engineering applications.

Copyright © 2012 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Configuration of pipeline by S-lay method

Grahic Jump Location
Figure 2

Scheme of segment I

Grahic Jump Location
Figure 3

Force sketch of differential components; (a) component A, (b) component B

Grahic Jump Location
Figure 4

Force sketch of a differential element of segment II

Grahic Jump Location
Figure 5

Force sketch of a differential element of segment III

Grahic Jump Location
Figure 6

Force sketch of a differential element of segment IV

Grahic Jump Location
Figure 7

Scheme of element division

Grahic Jump Location
Figure 8

Sketch of segment I

Grahic Jump Location
Figure 9

Comparison of pipeline configurations

Grahic Jump Location
Figure 10

Comparison of pipeline curvatures

Grahic Jump Location
Figure 11

Variation of soil resistance and shear strength with embedment depth

Grahic Jump Location
Figure 12

Pipeline configurations during laying process

Grahic Jump Location
Figure 13

Curvature distributions during the laying process

Grahic Jump Location
Figure 14

Tension distributions during the laying process

Grahic Jump Location
Figure 15

Distributions of pipeline strain at different sides; (a) the upper side, (b) the lower side

Grahic Jump Location
Figure 16

Pipeline configurations under different currents

Grahic Jump Location
Figure 17

Seabed stiffness

Grahic Jump Location
Figure 18

Pipeline configurations from TDP to EP

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In