海洋工程深水浮式系统设计方法研究
Research on Design Methods of Deepwater Floating Systems in Ocean Engineering
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摘要:
深水浮式系统主要由浮式平台、系泊系统和立管系统组成，浮式平台及其系泊缆索/立管的设计分析是平台系统正常作业和运行安全的重要保障。浮式平台的设计一般通过在频域内对平台进行水动力分析，然后将水动力荷载传递到有限元模型上对结构进行有限元分析。利用水动力分析结果和有限元分析结果，结合规范联合对平台进行设计。同时，由于浮式平台整体系统的非线性及动力学特性，势必要对浮式平台系统进行有效的时域耦合分析计算，整体耦合响应结果除了用于平台和系泊缆索/立管系统的初步设计外，还可作为系泊缆索或立管的动态边界条件，对其进行详细设计。针对这两种设计分析思路，首先对分析流程、分析中遇到的具体问题和研究方法进行简单介绍，然后结合软件应用，对海洋平台以及系泊缆索和立管的设计分析步骤进行总结介绍。 Abstract:Deepwater floating systems are mainly composed of floating hull, mooring system and riser system. The design analysis of floating platform and mooring/riser is very important for normal operation and running safely. For the design of floating platform, the hydrodynamic analysis is usually performed in frequency domain, and then the hydrodynamic loads are transferred to the finite element model to execute structural FE analysis. The design of the platform can be performed by combining the hydrodynamic analysis results and finite element analysis results with national standards. In addition, effective coupled analysis of the floating system in time domain must be executed due to the nonlinearity and dynamic properties. The results of global response can be used for the initial design of platform and mooring/riser system, and also can be used in the detailed design with the results as the dynamic boundary conditions of mooring/riser. According to these two design ideas, this paper gives a brief introduction of analysis flow, special problems and solution methods, and then introduce the steps of analysis of platform and mooring/riser by combining application of software.
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