半潜式起重平台系泊系统设计与优化研究

近年来,国内兴起了大力发展半潜式起重平台的势头,系泊系统的设计与优化是该类型平台开发中的关键问题之一。采用时域方法对半潜式起重平台系泊系统进行耦合动力分析,研究系泊系统主要参数对其动力响应特性的影响,并给出主要参数的设计优化流程,在此基础上,以能够满足安全校核且性能较优的系泊方案为目标,对该半潜式起重平台的系泊系统进行优化设计,并研究单根系泊缆发生破断对整个系泊系统的影响。结果表明:基于主要参数对系泊性能的影响规律,经优化设计得到的系泊方案,预留的安全欲度适中,能够保障半潜式起重平台在恶劣海况下的生存能力,同时具备较好的经济性。

Investigation on mooring system design and optimization of a semi-submersible crane vessel

In recent years, China has witnessed a rising trend triggered by the development of semi-submersible crane vessels, and mooring system design and optimization are one of the key issues in the design of the semi-submersible crane vessel. In this study, coupled-dynamic analysis of a semi-submersible crane vessel with mooring cables was performed in the time domain to design and optimize the mooring system, in which the effects of basic parameters of the mooring system on its dynamic characteristics were evaluated. Design and optimization procedure that involves basic parameters of mooring system is presented. Particular attention was paid to the reliability of the mooring system designed in both intact and damaged conditions respectively, the characteristics of mooring system were investigated when the single cable was damaged as well. It is seen that the safety margin of the mooring system designed is well-controlled, which can provide not only a guarantee for the survival ability of this semi-submersible crane vessel in an extreme environmental condition but also a good concern for economy.