The overall goal of the study is to investigate the extreme dynamic tension of mooring systems of a FOWT and propose a long-term distribution model which could improve the current approach to design tension of a mooring line. Thus, there is also a need for dynamic performance assessment of FOWT mooring systems using numerical modeling while considering the extreme events on the mooring lines. Hence the extreme tension values of the lines are one of the most important factors to consider for safe design of permanently FOWT mooring system. The extreme tension in mooring lines of a light displacement platform in shallow water is dominated by snap loads. However, the design of FOWT mooring systems is facing several challenges, including installation costs, the stability of light-weight minimalistic platforms, and shallow water depths (50-300m). Currently, the design philosophy for structures and moorings is based on principles and practices adopted in offshore oil and gas, including mooring systems that are optimized for applications in deeper waters. For offshore wind industry, exploiting the dynamic behaviors of mooring lines is of increasing importance in floating offshore wind turbine (FOWT) mooring system design.
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