海洋工程装备与技术

海洋工程装备与技术

• 船舶工程与配套设备 • 上一篇    下一篇

深水张紧式聚酯缆系泊系统疲劳分析研究

梁园华1， 韦斯俊1,2， 孙政策1， 杨清峡1   

  1. （1. 中国船级社海工技术中心，北京100007； 2. 北京数码易知科技发展有限责任公司，北京100007）
  • 出版日期:2018-10-30 发布日期:2018-10-30
  • 作者简介:梁园华（1976—），男，博士，教授级高工，主要从事海洋工程科研和规范研发工作。

Study on the Fatigue Analysis for Polyester Taut  Mooring System in Deep Water

LIANG Yuan-hua1， WEI Si-jun 1,2， SUN Zheng-ce 1， YANG Qing-xia 1   

  1. (1. Ocean Engineering Technology Research and Development Center, China Classification Society, Beijing  100007, China; 2. Beijing Digital Easy Technology Development Co., Ltd., Beijing 100007, China)
  • Online:2018-10-30 Published:2018-10-30

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摘要： 以一座采用张紧式聚酯缆系泊定位的深水半潜生产平台为研究对象，采用时域动态方法计算平台运动响应和系泊系统响应，对响应结果进行统计分析，通过采用修正系数窄带联合谱法计算系泊系统疲劳损伤。采用莫里森方程考虑系泊线的拖曳力效应和附加质量效应，通过对拖曳力系数、附加质量系数和聚酯缆拉伸刚度的敏感性分析，研究三个参数对深水张紧式聚酯缆系泊系统张力响应和疲劳损伤的影响。结果表明： 拖曳力系数变化和聚酯缆拉伸刚度对系泊系统疲劳损伤影响显著；附加质量系数变化对系泊系统疲劳损伤影响很小。

Abstract: In this paper, motions of a semi-submersible floating production unit and tension response of polyester taut mooring system are analyzed in dynamic time domain method. The statistical analysis is conducted on the data of platform and mooring system including motion and tension responses. Mooring line fatigue damage is calculated by using Combined Spectrum with Dual Narrow-Banded Correction Factor Method. Drag force and added inertia force of mooring line are calculated based on Morison equation. Sensitivity analysis on drag force coefficient, added inertia force coefficient and polyester EA are conducted to study their influence in mooring line fatigue damage calculation. The results show that the fatigue damage results calculated by dynamic time domain method are more serious than frequency domain method and static time domain; drag force coefficient and EA of mooring line have an appreciable effect on mooring line fatigue damage, while added inertia force coefficient has little effect on mooring line fatigue damage.

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