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42 st / July 2014 www.sea-technology.com bility of the chains at every main period translated to the cable and the total tension. Furthermore, the effect of the cable to the total effective tension was the following: Not only were the oscillations of total tension bigger, but their range was much bigger when a cable was added. Also, total effective tension at the buoy was similar to the cable, and the temporal pattern also shows traces of quasi-periodicity. The study of the range of curvature variation along the dynamic cable informs us about the more unstable cable segments. We found a big variability of curvature, between 10 and 20 meters' arc length. This simulation experiment shows that the design pro- cess for a large, underwater cable intended to moor a sur- face platform to a technology on the seafoor could beneft from modeling by offering information on the more unstable part of cable dynamics and the changing components of the platform structure. Such modeling could be of use in marine renewable energy projects, helping in the design of appro- priate power cables for mooring surface turbines at sea. Acknowledgments The authors extend their thanks to Orcina for their kind support and offer of the academic license N1594 to Univer- stitat Politècnica de Catalunya. References For a list of references, contact Joaquín del Río Fernán- dez at Joaquin.del.rio@upc.edu. n Joana Prat has been an associate professor of the Departament de Matemàtica Aplicada IV at Univer- stitat Politècnica de Catalunya (UPC), Spain, since 2001. She is a member of the research group SARTI. Her research focuses on applied methods to marine problems: nonlinear fuid dynamics, modeling of submarine moored cables and modeling of bottom trawl gear. Marisa Zaragozá has been an associate professor of the Departament de Matemàtica Aplicada IV at UPC since 2001. She is a member of the research group COMGRAF, which is interested in the theoreti- cal problems arising from the design and analysis of interconnection networks. Joaquín del Río Fernández received his B.S. and M.S. degrees in telecommunication engineering and elec- tronic engineering in 1999 and 2002, respectively, from UPC. Since 2001, he has been an assistant pro- fessor at UPC and a member of the research group SARTI. His research focuses on electronic instrumen- tation, interoperability in marine sensor networks, wireless sensor networks and the OBSEA cabled observatory. "We found a big variability of curvature, between 10 and 20 meters' arc length."