Reliability assessment of mooring system for fish cage considering one damaged mooring line

被引：20

作者：

Hou, Hui-Min ^{[1
,2
]}

Liu, Yong

Dong, Guo-Hai ^{[1
,2
]}

Xu, Tiao-Jian ^{[1
,2
]}

机构：

[1] Ocean Univ China, Coll Engn, Qingdao 266100, Peoples R China

[2] Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Peoples R China

来源：

OCEAN ENGINEERING | 2022年 / 257卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Reliability; Damaged mooring system; Accidental limit state; Progressive failure; DENSITY EVOLUTION METHOD; OFFSHORE WIND TURBINE; NET CAGE; HYDRODYNAMIC BEHAVIOR; RESPONSE ANALYSIS; DESIGN; ULTIMATE; WAVES; TLP;

D O I：

10.1016/j.oceaneng.2022.111626

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

The reliability of the mooring system considering one damaged mooring line should be assessed for evaluating the risk resistance capacity of the mooring system for the offshore aquaculture farm. In this study, both the probability of failure under the accidental limit state (ALS) and the probability of progressive failure of the mooring system for the fish cage are investigated. A series of numerical simulations were carried out to analyze the redistributed tension response of the mooring system after one mooring line fails. And the reliability of the mooring system under ALS is predicted based on the generalized probability density evolution method. In addition, an improved method based on a series of realistic failure scenarios is proposed to estimate the progressive reliability of the mooring system for the fish cage. The results indicate that the failure of one mooring line significantly affects the probability of failure of the remaining mooring lines and the probability of failure of the mooring system is overestimated by the traditional reliability method without considering the progressive failure of the mooring system. Therefore, it is of paramount importance to quantitatively assess the system reliability of the offshore fish farm considering the progressive failure.

引用

页数：21

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