A three-dimensional method of calculating wave loads of turret moored FPSO (Flo ating Production Storage and Offloading) tankers is presented. The linearized restoring forces acting on the ship hull by the mooring sys...A three-dimensional method of calculating wave loads of turret moored FPSO (Flo ating Production Storage and Offloading) tankers is presented. The linearized restoring forces acting on the ship hull by the mooring system are calculated according to the catenary theory, which are expressed as the function of linear stiffness coefficients and the displacements of the upper ends of mooring chains. The hydrodynamic coefficients of the ship are calculated by the three-dimensional potential flow theory of the linear hydrodynamic problem for ships with a low forward speed. The equations of ship motions are established with the effect of the restoring forces from the mooring system included as linear stiffness coefficients. The equations of motions are solved in frequency domain, and the responses of wave-induced motions and loads on the ship can be obtained. A computer pro gram based on this method has been developed,and some calculation examples are illustrated. Analysis results show that the method can give satisfying prediction of wave loads.展开更多
文中利用水动力分析软件AQWA研究了单点系泊FPSO(floating production,storage and offloading system)与油轮串靠外输时的水动力干扰及不同内转塔位置下串靠外输系统的运动响应,分析了不同转塔位置对FPSO风标效应及外输安全性的影响....文中利用水动力分析软件AQWA研究了单点系泊FPSO(floating production,storage and offloading system)与油轮串靠外输时的水动力干扰及不同内转塔位置下串靠外输系统的运动响应,分析了不同转塔位置对FPSO风标效应及外输安全性的影响.计算结果表明串靠外输时两船的装载情况对水动力干扰影响较大,低频波浪入射时串靠驳船的存在对FPSO二阶漂移力的影响较大,不同的转塔位置对FPSO-油轮系统风标效应存在显著影响.文中计算的4种工况中,FPSO内转塔位置距船艏约25%船长处最合理,风标效应较强且外输安全性较高.文中的计算及分析结果对内转塔式FPSO及外输系统的设计具有一定指导意义.展开更多
为了填补我国在油船改造FPSO设计技术方面的不足,开拓FPSO海外市场,从船级社规范、项目工期、工程造价等方面对比油船改造FPSO和新建FPSO的差异,基于BV NI 593规范,阐述改造FPSO的船体结构评估豁免权的适用条件,解析更新板厚的计算方法...为了填补我国在油船改造FPSO设计技术方面的不足,开拓FPSO海外市场,从船级社规范、项目工期、工程造价等方面对比油船改造FPSO和新建FPSO的差异,基于BV NI 593规范,阐述改造FPSO的船体结构评估豁免权的适用条件,解析更新板厚的计算方法。对比改造与新建FPSO交付周期,分析4个载重吨级油船改造与新建FPSO的投资案例,结果表明,油船改造比新建FPSO优势明显。展开更多
Problems experienced during Floating Production,Storage and Offloading(FPSO) tandem offloading operations were investigated.The aim of this research was to improve the reliability of such systems,and it needed a means...Problems experienced during Floating Production,Storage and Offloading(FPSO) tandem offloading operations were investigated.The aim of this research was to improve the reliability of such systems,and it needed a means to assess them.Time-domain simulation and analysis of offloading systems was performed using the multi-body mooring software ARIANE 7.0.Hydrodynamic interaction between the vessels was considered.The responses of the offloading system in different loading cases,different parameters of offloading hawsers and the effects of challenging environmental conditions were calculated.There was a focus on the problems of relative motion between the two bodies and its effects on the intensity of hawser forces.Minimum relative distance,maximum relative headings and maximum tension in the hawsers of offloading systems were obtained by time-domain analysis.The time-domain analysis was effective and comparative study can be used to optimize parameters of the system and extend operating limits.展开更多
文摘A three-dimensional method of calculating wave loads of turret moored FPSO (Flo ating Production Storage and Offloading) tankers is presented. The linearized restoring forces acting on the ship hull by the mooring system are calculated according to the catenary theory, which are expressed as the function of linear stiffness coefficients and the displacements of the upper ends of mooring chains. The hydrodynamic coefficients of the ship are calculated by the three-dimensional potential flow theory of the linear hydrodynamic problem for ships with a low forward speed. The equations of ship motions are established with the effect of the restoring forces from the mooring system included as linear stiffness coefficients. The equations of motions are solved in frequency domain, and the responses of wave-induced motions and loads on the ship can be obtained. A computer pro gram based on this method has been developed,and some calculation examples are illustrated. Analysis results show that the method can give satisfying prediction of wave loads.
文摘文中利用水动力分析软件AQWA研究了单点系泊FPSO(floating production,storage and offloading system)与油轮串靠外输时的水动力干扰及不同内转塔位置下串靠外输系统的运动响应,分析了不同转塔位置对FPSO风标效应及外输安全性的影响.计算结果表明串靠外输时两船的装载情况对水动力干扰影响较大,低频波浪入射时串靠驳船的存在对FPSO二阶漂移力的影响较大,不同的转塔位置对FPSO-油轮系统风标效应存在显著影响.文中计算的4种工况中,FPSO内转塔位置距船艏约25%船长处最合理,风标效应较强且外输安全性较高.文中的计算及分析结果对内转塔式FPSO及外输系统的设计具有一定指导意义.
文摘为了填补我国在油船改造FPSO设计技术方面的不足,开拓FPSO海外市场,从船级社规范、项目工期、工程造价等方面对比油船改造FPSO和新建FPSO的差异,基于BV NI 593规范,阐述改造FPSO的船体结构评估豁免权的适用条件,解析更新板厚的计算方法。对比改造与新建FPSO交付周期,分析4个载重吨级油船改造与新建FPSO的投资案例,结果表明,油船改造比新建FPSO优势明显。
基金Supported by China National 111 Project foundation from the State Administration of Foreign Experts Affairs of Chinathe Ministry of Education of China under Grant No.B07019
文摘Problems experienced during Floating Production,Storage and Offloading(FPSO) tandem offloading operations were investigated.The aim of this research was to improve the reliability of such systems,and it needed a means to assess them.Time-domain simulation and analysis of offloading systems was performed using the multi-body mooring software ARIANE 7.0.Hydrodynamic interaction between the vessels was considered.The responses of the offloading system in different loading cases,different parameters of offloading hawsers and the effects of challenging environmental conditions were calculated.There was a focus on the problems of relative motion between the two bodies and its effects on the intensity of hawser forces.Minimum relative distance,maximum relative headings and maximum tension in the hawsers of offloading systems were obtained by time-domain analysis.The time-domain analysis was effective and comparative study can be used to optimize parameters of the system and extend operating limits.
