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Publicações
Monarcha, A. e Fonseca, N. (2012), “A static analytical method for the preliminary design of multiple line mooring system”, Maritime Engineering and Technology, Guedes Soares et al. (Eds),Taylor & Francis Group, London, pp. 195-203
The paper presents an analytical method for the analysis and preliminary design of multiple line mooring systems. The method is based on the classical solution of the catenary of a single cable, namely the curve that a uniform, flexible and inextensible cable assumes when hanging under the influence of gravity. Firstly the formulation is presented for the case of inextensible lines and afterwards the method is extended to properly account the material elasticity, which significantly affects the tensions along the line when the line is taut. The resulting equations are solved by a computer code which implements algorithms able to derive the static response in terms of end force and tension distribution in an elastic catenary by knowing the equilibrium geometry of the system, the elasticity and the unstretched length of each line. The solution is generalized for axis-symmetric multiple lines which resemble the typical mooring arrangement of floating offshore structures. The advantage of this approach results from the capability to provide the existence and uniqueness of solution, which, together with the very small computational effort, makes this method a perfect tool for a preliminary design. Finally, the applicability of the method is demonstrated with the preliminary design of the mooring system for a generic floating wave energy converter operating at theWest coast of Portugal.
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