Assessing corrosion, wear, fatigue and VIV on moorings and cabling to reduce risk in marine operations

Principal Investigators:

Mr. Dean Steinke, Dynamic Systems Analysis Ltd. (DSA); Dalhousie University, Acadia University, Scotrenewables Tidal Power Ltd. and Tocardo Tidal Turbines

Start Date: October 2017

End Date: August 2018

The cost of cabling and moorings over the entire life of a tidal energy project is a significant proportion of total project expenditures, while the potential failure of these components remains a major risk for the emerging tidal energy sector. In addition to mooring problems that complicated the recent Cape Sharp Tidal turbine retrieval, floating tidal turbine developers Tocardo Tidal Turbines and Scottrenewables Tidal Power Ltd. have unanswered questions about the longevity of power cables and moorings subject to turbulent tidal flows. T

The research project proposed by Halifax-based DSA, in partnership with FORCE),Dalhousie University, Acadia University, Scottrenewables Tidal Power Ltd. and Tocardo Tidal Turbines will address gaps in knowledge and data related to corrosion, wear, fatigue, and vortex induced vibrations of moorings and cables in turbulent tidal flows. Mooring and cable loads and motions will be monitored using load cells and accelerometers, respectively. The predicted corrosion, loads, and strumming will be compared against expectations derived from finite-element mooring line models and guidance such as that provided by existing offshore standards. The project will deliver practical guidance on mooring and cable analysis in tidal passages through full scale experimentation. It will serve to drive the ongoing cost of moorings and cables, and reduce project risk for developers.