Stress analyses of free spanning subsea pipelines with finite element method

Zhi Gang Xiao, Xiao Ling Zhao

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

4 Citations (Scopus)

Abstract

As part of a research work on the fatigue of free spanning subsea pipelines, the maximum longitudinal stress at or near mid-span and that at support are solved with finite element method for a 10" flow line and a 20" export line under different span length and support conditions. The maximum longitudinal stresses are also calculated for some cases of a two-span flow line. These stresses serve as intermediate results to be used in combination with other data such as pipeline frequency, wave and current velocity for the fatigue evaluation of subsea pipelines. Stress results of single span pipelines show that the maximum longitudinal stress decreases as the span length increases. The maximum stress at the fixed end in the fixed/fixed boundary case is the largest while the maximum at mid-span of pinned/pinned case the smallest among the obtained maximum stresses. The two-span flow line results show that the support length does not have significant effect on the maximum stress.

Original languageEnglish
Title of host publicationProceedings of the 10th International Symposium on Structural Engineering for Young Experts, ISSEYE 2008
Pages305-309
Number of pages5
Publication statusPublished - 2008
Externally publishedYes
Event10th International Symposium on Structural Engineering for Young Experts, ISSEYE 2008 - Changsha, China
Duration: 19 Oct 200821 Oct 2008

Publication series

NameProceedings of the 10th International Symposium on Structural Engineering for Young Experts, ISSEYE 2008

Conference

Conference10th International Symposium on Structural Engineering for Young Experts, ISSEYE 2008
Country/TerritoryChina
CityChangsha
Period19/10/0821/10/08

Keywords

  • Fatigue
  • Finite element method (FEM)
  • Girth weld
  • Longitudinal stress
  • Subsea pipeline

ASJC Scopus subject areas

  • Civil and Structural Engineering

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