Experimental study of hard marine growth effect on the hydrodynamical behaviour of a submarine cable

Submarine cables such as electrical umbilical power for floating wind turbines are subject to biofouling which can have an important effect on their dynamical behaviour under wave and current conditions by drastically increasing size mass. The impact of the dynamic underwater cable characterized hydrodynamic coefficients, drag inertia must therefore be quantified. Hence, experiments been carried out in a flume tank compare dynamics cylinder colonized several kinds roughnesses. studied roughnesses concern realistic marine growth shapes patterns with larger sharper edges than those classically studied, order more representative hard fouling, Mytilus Edulis encountered western north coasts France. Seven configurations tested relative roughness coefficient ranging from diameter ratio up 0.136. A specificity this work is highly representation colonization through 3D printing covers, defined statistical analysis situ observations measurements. Tests using only, then line horizontal oscillating motions only finally combination both, intention reproducing specific suitable offshore applications. Using conditions, calculated coefficients quite similar between configurations. However, addition simulate induced has significant results. presence leads particular increase phenomena. Morison method used characterize discussed paper.