上海交通大学学报

上海交通大学学报（自然版）

• 建筑科学 • 上一篇    下一篇

超期服务浮式平台锚链疲劳寿命安全评估

王佳颖，张世联，徐伟，王文明   

  1. (上海交通大学 海洋工程国家重点实验室， 上海 200030)
  • 收稿日期:2007-11-03 修回日期:1900-01-01 出版日期:2008-11-28 发布日期:2008-11-28
  • 通讯作者: 张世联

Safety Assessment for Fatigue Life of Floating Platform Mooring

WANG Jia-ying,ZHANG Shi-lian，XU Wei,WANG Wen-ming   

  1. (State Key Laboratory of Ocean Engineering, Shanghai Jiaotong University, Shanghai 200030, China)
  • Received:2007-11-03 Revised:1900-01-01 Online:2008-11-28 Published:2008-11-28
  • Contact: ZHANG Shi-lian

摘要： 基于线性累积损伤Miner理论，根据波频和低频波浪力引起的锚链张力统计幅值及锚链损伤后的破断张力，对某超期服务的半潜浮式平台锚链系统的疲劳寿命进行安全评估.研究结果表明：二阶慢漂是引起浮式平台锚链系统疲劳累积损伤的主要因素；锚链损伤后的破断张力对锚链疲劳安全寿命影响较大.文中提出的锚链疲劳寿命的评估方法同样适用于其他超期服务浮式平台锚链的疲劳安全评估.

关键词: 浮式平台, 锚链, 损伤, 疲劳寿命, 低频

Abstract: Based on Miner fatigue damage theory, after the calculation of the statistical amplitude of mooring tension induced by lowfrequency and wavefrequency wave and the damaged mooring breaking strength, the safety assessment for the fatigue life of a semisubmersible platform’s mooring system in extended service was finished. The research result indicates that secondorder resonant motion is the main ingredient that induces the mooring fatigue damage and the damaged mooring breaking strength has a great impact on mooring fatigue safety life. The assessment method of mooring fatigue life in this paper is applicable in similar assessment for other floating platform mooring in extended service.

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