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Publications
Nava, V., Rajic, M. and Guedes Soares, C. (2012), Effects of Water Depth on the Dynamics of a Moored Buoy under Irregular Waves, 20th Symposium on Theory and Practice of Shipbuilding (SORTA 2012), 27 to 29 September, Zagreb, Croatia
The aim of this paper is to provide a tool for checking mooring line characteristics, or mooring setup for known environmental conditions, to designers and scientific community. For this purpose, effects of the water depth on the dynamics of a moored buoy for the production of energy are investigated. In further detail, the motions of a two-dimensional spherical buoy are studied under the action of irregular cylindrical waves. The restoring forces, needed to keep into station the buoy, are provided by a mooring line under the action of only its own weight, following a quasi-static approach. Mooring line is allowed to be taut or slack and tensions along the cable are determined by means of analytical solutions for inextensible cables. Numerical methods are then used to obtain forces and cable properties under any displaced condition.
Monte-Carlo simulations of random forces have been carried out, and analyses in time and frequency domains have been performed in deep and intermediate waters. Finally results in terms of statistics of the motion of the buoy have been obtained and compared.
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