Coupled effects on a single point mooring(SPM) system subjected to the combined action of wind,waves and current are studied in this paper. Due to the complicatedness of the sea state and the huge size of the vessel,p...Coupled effects on a single point mooring(SPM) system subjected to the combined action of wind,waves and current are studied in this paper. Due to the complicatedness of the sea state and the huge size of the vessel,physical experimental study is both time consuming and uneconomical,whereas the numerical study is cost-effective and DNV software provides powerful SESAM software in solving the issues. This paper focuses on the modeling process of the SPM system,catenary equilibrium calculation,static analysis of the vessel in three different scenarios,and dynamic response simulation of the SPM system under environmental excitations. The three scenarios in study are as follows:the SPM is under the combined function of(a) wind,waves and current,(b) wind and waves,(c) current and waves. They are so set that one can compare the contributions of different types of loads in both static and dynamic studies. Numerical study shows that wind and current are the two major factors contributing to the mooring line tension,and surge and sway are the two dominant motions of the moored vessel subjected to environmental excitations.展开更多
研究了风浪流联合作用下单点系泊船的受力问题。在应用N ewm an公式计算波浪漂移力的基础上,结合文献《F leetM oorings D es ign M anua l》,提出了不同方向的风、浪、流联合作用时,单点系泊船所受到的横向力、纵向力和回转力矩的计算...研究了风浪流联合作用下单点系泊船的受力问题。在应用N ewm an公式计算波浪漂移力的基础上,结合文献《F leetM oorings D es ign M anua l》,提出了不同方向的风、浪、流联合作用时,单点系泊船所受到的横向力、纵向力和回转力矩的计算方法。提出了风浪同向时,不同风流夹角组合对应的船舶平衡位置的确定方法。为缆绳、锚的选择以及舵角的控制提供了依据。最后通过算例验证了本方法的适用性和实用性。展开更多
基金This work has been financially supported by the Cultivation Fund of the Key Scientific and Technical Innovation Project,Ministry of Education of China under Grant No.704031by the Natural Science Foundation of Qingdao,Grant No.05-2-JC-88.
文摘Coupled effects on a single point mooring(SPM) system subjected to the combined action of wind,waves and current are studied in this paper. Due to the complicatedness of the sea state and the huge size of the vessel,physical experimental study is both time consuming and uneconomical,whereas the numerical study is cost-effective and DNV software provides powerful SESAM software in solving the issues. This paper focuses on the modeling process of the SPM system,catenary equilibrium calculation,static analysis of the vessel in three different scenarios,and dynamic response simulation of the SPM system under environmental excitations. The three scenarios in study are as follows:the SPM is under the combined function of(a) wind,waves and current,(b) wind and waves,(c) current and waves. They are so set that one can compare the contributions of different types of loads in both static and dynamic studies. Numerical study shows that wind and current are the two major factors contributing to the mooring line tension,and surge and sway are the two dominant motions of the moored vessel subjected to environmental excitations.
文摘研究了风浪流联合作用下单点系泊船的受力问题。在应用N ewm an公式计算波浪漂移力的基础上,结合文献《F leetM oorings D es ign M anua l》,提出了不同方向的风、浪、流联合作用时,单点系泊船所受到的横向力、纵向力和回转力矩的计算方法。提出了风浪同向时,不同风流夹角组合对应的船舶平衡位置的确定方法。为缆绳、锚的选择以及舵角的控制提供了依据。最后通过算例验证了本方法的适用性和实用性。
文摘针对浅水环境下典型外单点系泊系统的结构特性,建立悬链锚腿式系泊系统(Catenary Anchor Leg Mooring System,CALM)、单锚摇臂式系统(Sal Yoke System,SYS)、水上软刚臂式系泊系统(Soft Yoke Mooring System,SYMS)3种单点系泊系统和浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)船体的多体水动力模型。基于船体与外单点系泊系统的时域耦合分析算法,综合考虑风、浪、流载荷的影响,计算得到FPSO的运动响应和外单点系泊系统所受载荷,统计和比较各单点系统的系泊性能和特点,为浅水环境下外单点系泊系统的设计研究提供理论依据。
