海洋工程装备与技术

海洋工程装备与技术 ›› 2015, Vol. 2 ›› Issue (3): 196-200.

• 海洋工程装备设计技术 • 上一篇    下一篇

基于疲劳寿命的海底管道自由悬跨分析

李秀锋, 冯现洪   

  1. 海洋石油工程股份有限公司,天津 300451
  • 收稿日期:2015-06-03 出版日期:2015-06-10 发布日期:2016-01-21
  • 作者简介:

    作者简介:李秀锋(1980-),男,工程师,主要从事海底管道的结构设计。

Subsea Pipeline Span Analysis Based on Fatigue Life

Xiu-feng LI, Xian-hong FENG   

  1. Offshore Oil Engineering Co., Ltd., Tianjin 300451, China
  • Received:2015-06-03 Online:2015-06-10 Published:2016-01-21

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摘要：

传统悬跨分析以不发生涡激振动和强度极限状态为原则确定最大可以接受的自由悬跨长度。随着水深的增加,悬跨处理的成本急剧增加,以疲劳寿命为准则可以显著地增加最大可接受悬跨长度,减少工程费用。介绍了海底管道设计过程中的悬跨分析方法和悬跨接受标准。提出在设计阶段以疲劳极限状态为接受标准,并结合有限元计算进行悬跨分析,可减少悬跨处理量,节约大量工程费用。

关键词: 海底管道, 自由悬跨, 涡激振动, 疲劳极限状态, 悬跨修正

Abstract:

Traditionally, span analysis determines the maximum allowable free span length based on the condition that no vortex induced vibration (VIV) will happen and the assumption of strength ultimate limit state (ULS). The cost of span mitigation rises rapidly with the increase of water depth. Free span analysis based on fatigue life could remarkably increase the maximum allowable span length and cut the engineering cost. We present the free span analysis method and criteria for subsea pipeline. Based on the engineering project which is the first time to use fatigue limit for pipeline design, the free span analysis is conducted by fatigue limit state (FLS) and finite element method, and the results minimize the number of span mitigation.

Key words: subsea pipeline, free span, vortex induced vibration, fatigue limit state (FLS), span mitigation

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