Programmable Flexible materials for Mooring and Station Keeping

Programmable flexible materials for mooring and station keeping

Saeid Lotfian, University of Strathclyde

Renewable marine energy has emerged as a centrepiece of the new energy economy, because of its abundance, regularity and to be environmental - friendly. Floating offshore platforms could solve the problem of using high depth water to extract energy by using mooring systems. The moorings of wave devices, floating tidal turbines and ultimately floating offshore wind turbines will be subjected to the combined excitations of hydrostatic, hydrodynamic, aerodynamic and electromechanical forces driven by acombination of wave, tidal, wind and network interactions. The performance and structural responses of the energy converters are influenced by the behaviour of the moorings.The required performance characteristics of dynamic mooring systems (Functional Specification) and the adaptive strain/stiffness requirements for a 10MW Taut LineBuoy (TLB) floating structure concept with four-anchor was defined. In this study, different mooring line diameters were considered and the maximum RAO (Response Amplitude Operator) motion amplitude achieved when the waves have an incidentangle of 0 degrees (head sea). The following objectives were investigated during thisresearch:

 Investigate the potential of programmable flexible materials to provide adaptive behaviour and improved sympathetic mooring response.

 Study the dynamic mooring systems to create a definition of adaptive strain/stiffness.

 A combination of smart materials and structure solutions would be investigated in tandem with mooring design analysis.