A Novel Numerical Approach to the Dynamics Analysis of Marine Cables
Iordan Matulea, Dragos Stefan, Bogdan Vladescu, Cristian Barbu, A. M. Gonçalves-Coelho

Abstract
Marine cables are exposed to the action of water in relative motion, and hence the need to predict the dynamic behavior of these complex mechanical systems under the typical working conditions since the outset of the corresponding design processes. This paper describes the basic principles that can be used in a computer program meant to support the design of marine cables that should work under a combination of static and dynamic loadings. A unique mathematical model and a matching numerical method based on finite differences are used, first for determining the static equilibrium configuration of the riser, and then for findings its dynamic response around the formerly computed static configuration. A computer program was specially developed for implementing the proposed model, and a step-by-step method for the design of marine cables similar to the ones in operation at the Black Sea are herein presented. The conclusion is that this new model provides a coherent and efficient means to analyze the dynamic behavior of marine cables, as required during the design process.

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