Publications

Depalo, F., Wang, S., Xu, S. and Guedes Soares, C. (2021), “Design and analysis of a mooring system for a wave energy converter", Journal of Marine Science and Engineering, Vol 9, 782.

The objective of the work is the preliminary design of the mooring system for a wave energy converter and its subsequent analysis. Firstly, the static analysis is performed for a configuration with three mooring cables with different pre-tensions on fairlead, diameters of the cables, and materials. Based on these configurations from the static analysis, a quasi-static analysis is carried out in the frequency domain and a preliminary design is conducted according to DNV rules. Then, a 3-hour dynamic analysis in the time domain is performed on several selected configurations, considering the same environmental conditions in the quasi-static analysis using the finite element method. Extreme dynamic responses of the system, such as extreme surge motion and mooring tensions, are estimated by the global maximum method, which is performed by fitting 20 individual maximum observations by Gumbel distribution. The results obtained with the two methods (quasi-static and dynamic analysis) are compared and analysed. In addition, the influence of pre-tensions and cable’s diameters on the static and dynamic responses of the mooring system is discussed.

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