Mooring systems have a great influence on the wind-wave-current resistance of floating offshore platforms. Especially in extreme sea conditions, the safety of platforms is largely determined by the reliability of the mooring systems. Therefore, it is necessary to analyze and compare the dynamic responses of platforms with different moorings. By using numerical simulation and physical model test methods, the hydrodynamic performance of two different mooring systems, namely taut mooring system and inverted S relaxation mooring system with buoy, under the extreme wind-waves-current is studied by using real sea data and calculated recurrence period data in the northern sea area of Weihai Chu island. The test results show that the dynamic response of the platform is significantly affected by different mooring types. The relaxation mooring type has better ability to resist extreme environment and lower maintenance cost, but the movement is more obvious. The taut type has better effect of the fixed point observation and sea test, but the demand for the reliability of the mooring system is higher, and the maintenance cost is high. The research results provide data support for the maintenance and modification of the mooring system of the "National Sea Test 1" test platform of the National Ocean Test Site, and provide a reference for the design of other mooring platforms.
LU Kuan，WANG Huamei，SONG Yuze，RAO Xiang.
Dynamic responses of a floating offshore platform under extreme sea conditions with different mooring systems[J]. Journal of Vibration and Shock, 2022, 41(10): 140-146
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