This paper numerically and experimentally investigates the hydrodynamic interaction between two semi-submersible type VLFS modules in the frequency domain. Model tests were conducted to investigate the relationship be...This paper numerically and experimentally investigates the hydrodynamic interaction between two semi-submersible type VLFS modules in the frequency domain. Model tests were conducted to investigate the relationship between interactions and wave headings. Numerical studies were performed by solving the radiation-diffraction problem and were validated against the experimental results. Motion Response Amplitude Operators (RAOs) were obtained from numerical and experimental studies. The dependency of the hydrodynamic interaction effect on wave headings is clarified. The influence of different wave periods on the motion responses of two-module VLFS and wave elevations in the gap is studied. The results indicate that the hydrodynamic interactions of the two modules are directly related to the wave headings and the periods of the incident wave. The shielding effect plays an important role in short wave, and the influence decreases with the increase of the incident wavelength. The numerical results based on the diffraction-radiation code can give a relatively good estimation to the responses in short wave while for long wave, it would over-predict the response.展开更多
This paper presents some insights on the state-of-the-art practice that has been utilized recently in the inplace structural strength and fatigue analysis for topsides on deepwater floating platforms such as tension l...This paper presents some insights on the state-of-the-art practice that has been utilized recently in the inplace structural strength and fatigue analysis for topsides on deepwater floating platforms such as tension leg plat-form (TLP) and semi-submersibles. Emphases are put on analysis software,geometric and mass modeling,hydro-dynamic loading and its mapping,and analysis procedures. In addition,for the in-place analysis using structure analysis computer system (SACS),the procedure of Visual Basic for Application (VBA) is developed to map AQWA-LINE hydrodynamic loading to the SACS integrated hull/topsides model;for the in-place analysis using structure engineering system analysis model (SESAM),many computer aided applications are made to aid the post-processing. These applications have been used in structural analyses for a few TLP and semi-submersible plat-form topsides,and are briefly introduced in this paper.展开更多
海上浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)是集海上油气生产处理、储存外输、动力供应及生活支持于一体的可移动综合性大型海上生产设施,长期系泊于固定海域,是海上油气开采的关键核心装置,使用优势明...海上浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)是集海上油气生产处理、储存外输、动力供应及生活支持于一体的可移动综合性大型海上生产设施,长期系泊于固定海域,是海上油气开采的关键核心装置,使用优势明显,在海上油气田开发中应用越来越广泛。FPSO工艺复杂、设备设施集成化程度高、建造难度大、建设周期长。准确合理评估FPSO建设工期直接关系到油气田投产时间和整体开发计划,对于海洋工程项目进度控制十分关键。FPSO建设周期与众多因素有关,对FPSO建造集成的一般流程和方法进行总结归纳,采用关键路径法对FPSO整体工期进行分析研究,得到一种FPSO整体工期评估方法。通过工程实例对FPSO整体工期评估方法进行印证得出,评估方法适用于大型FPSO建造集成计划的编制与工期评价。研究结果可为类似大型FPSO建造集成计划的编制和工期评价提供参考。展开更多
基金financially supported by the National Natural Science Foundation of China(Grant Nos.51709170 and 51979167)the Ministry of Industry and Information Technology of China(Mooring position technology:floating support platform engineering(Ⅱ))+1 种基金the Shanghai Sailing Program(Grant No.17YF1409700)the China Scholarship Council(Grant No.201806230206)
文摘This paper numerically and experimentally investigates the hydrodynamic interaction between two semi-submersible type VLFS modules in the frequency domain. Model tests were conducted to investigate the relationship between interactions and wave headings. Numerical studies were performed by solving the radiation-diffraction problem and were validated against the experimental results. Motion Response Amplitude Operators (RAOs) were obtained from numerical and experimental studies. The dependency of the hydrodynamic interaction effect on wave headings is clarified. The influence of different wave periods on the motion responses of two-module VLFS and wave elevations in the gap is studied. The results indicate that the hydrodynamic interactions of the two modules are directly related to the wave headings and the periods of the incident wave. The shielding effect plays an important role in short wave, and the influence decreases with the increase of the incident wavelength. The numerical results based on the diffraction-radiation code can give a relatively good estimation to the responses in short wave while for long wave, it would over-predict the response.
文摘This paper presents some insights on the state-of-the-art practice that has been utilized recently in the inplace structural strength and fatigue analysis for topsides on deepwater floating platforms such as tension leg plat-form (TLP) and semi-submersibles. Emphases are put on analysis software,geometric and mass modeling,hydro-dynamic loading and its mapping,and analysis procedures. In addition,for the in-place analysis using structure analysis computer system (SACS),the procedure of Visual Basic for Application (VBA) is developed to map AQWA-LINE hydrodynamic loading to the SACS integrated hull/topsides model;for the in-place analysis using structure engineering system analysis model (SESAM),many computer aided applications are made to aid the post-processing. These applications have been used in structural analyses for a few TLP and semi-submersible plat-form topsides,and are briefly introduced in this paper.
文摘海上浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)是集海上油气生产处理、储存外输、动力供应及生活支持于一体的可移动综合性大型海上生产设施,长期系泊于固定海域,是海上油气开采的关键核心装置,使用优势明显,在海上油气田开发中应用越来越广泛。FPSO工艺复杂、设备设施集成化程度高、建造难度大、建设周期长。准确合理评估FPSO建设工期直接关系到油气田投产时间和整体开发计划,对于海洋工程项目进度控制十分关键。FPSO建设周期与众多因素有关,对FPSO建造集成的一般流程和方法进行总结归纳,采用关键路径法对FPSO整体工期进行分析研究,得到一种FPSO整体工期评估方法。通过工程实例对FPSO整体工期评估方法进行印证得出,评估方法适用于大型FPSO建造集成计划的编制与工期评价。研究结果可为类似大型FPSO建造集成计划的编制和工期评价提供参考。
