采用基于T-N曲线和Miner线性累积损伤准则的疲劳累积损伤法对绷紧式系泊系统中聚酯纤维缆的疲劳损伤进行研究。简单阐述了系泊系统疲劳分析的相关理论，并给出了疲劳损伤的具体计算步骤。借助于Ansys/Aqwa以及Matlab软件，以“海洋石油981”为半潜式平台模型，计算了1 500 m水深的绷紧式系泊系统中聚酯纤维缆顶端的疲劳损伤。研究结果表明：低频海况以及高幅值海况对系缆的损伤较大。
Based on the T-N curve and Miner linear cumulative damage criterion, the fatigue damage of the fiber cable in the taut mooring system was studied. In this paper, the relevant theory of fatigue analysis of mooring system is simply described, and the concrete calculation steps of fatigue damage are given. With the help of ANSYS/Aqwa and Matlab software, the "offshore oil 981" as a semi-submersible platform model is used to calculate the fatigue damage of the top of the polyester fiber cable in the 1 500 m depth mooring system. The research results show that low-frequency sea conditions and high-amplitude sea conditions lead greater damage to the cable.
2019,41(8): 69-73 收稿日期：2018-04-01
DOI：10.3404/j.issn.1672-7649.2019.08.014
分类号：P751
基金项目：浙江省自然科学基金资助项目（Y14E090034，Y13F020140）；上海交通大学海洋工程国家重点实验室开放基金资助项目（1516）；卫星海洋环境动力学国家重点实验室开放基金资助项目（SOED1706）；浙江省大学生科技创新活动计划暨新苗人才计划资助项目（2017R409053）
作者简介：田中仁(1991-),男,硕士研究生,主要从事海洋动力学、海洋工程仿真技术研究
参考文献：
[1] WIRSCHING P H. Fatigue reliability for offshore structures[J]. Journal of Structural Engineering, ASCE, 1984, 110(10):2340-2356
[2] HAN J S, KIM Y H, SON Y J, et al. A comparative study on the fatigue life of mooring systems with different composition[J]. Journal of Hydrodynamics, Ser. B, 2010, 22(5):452-456
[3] OMAR V A, BRUNO E G, SUDATI S L V. Fatigue analysis and reliability of floating production systems mooring lines in deepwater[C]//Proceedings of the 17th International Conference on Ocean, Offshore and Arctic Engineering, Lisbon, Portugal. 1998.
[4] 乔东生, 欧进萍. 半潜式平台两种锚泊系统的疲劳损伤比较计算[J]. 振动与冲击, 2014(13):1-5 QIAO Dong-sheng, OU Jin-ping. Comparative calculation on fatigue damage of two types of mooring systems for semi-submersible platform[J]. Journal of Vibration and Shock, 2014(13):1-5
[5] 乔东生, 欧进萍. 深水悬链复合锚泊线疲劳损伤计算[J]. 船舶力学, 2012, 16(4):422-432 QIAO Dong-sheng, OU Jin-ping. Calculation on fatigue damage of deepwater catenary hybrid mooring line[J]. Journal of Ship Mechanics, 2012, 16(4):422-432
[6] 曹菡, 强兆新, 苗文举, 等. 半潜式综合支撑平台系泊疲劳分析[J]. 中国海洋平台, 2016, 31(2):62-67+74 CAO Han, QIANG Zhao-xin, MIAO Wen-ju, LIU Zhi-gang. Fatigue analysis for mooring lines of a semi-submerged platform[J]. China of Fshore Platform, 2016, 31(2):62-67+74
[7] 王颢然, 魏跃峰, 潘方豪. 单点系泊FPSO系泊缆疲劳寿命研究[J]. 船舶, 2015(2):101-105 WANG Hao-ran, WEI Yue-feng, PAN Fang-hao. On fatigue life of a single point mooring system on FPSO[J]. Ship & Boat, 2015(2):101-105
[8] 宋宪仓. 深水半潜式平台疲劳损伤评估技术研究[D]. 青岛:中国海洋大学, 2015. SONG Xian-cang. Research on technology of fatigue damage assessment for deepwater semi-submersible platform[D]. Qingdao:Ocean University of China, 2015.
