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STRUCTURAL MODELLING OF OIL SPILL CONTAINMENT BOOMS BY THE FINITE ELEMENT METHOD

Fig. 3 Stress at different stages. Oil leakage (doc La Rochelle University). Up stream. Float and reinforced skirt only. SPH fluids flow model (doc LNHE EDF). q 7.6. Down stream. add a bottom skirt chain. q -22. 6. Fig 1. Boom Element Stress V=0.5 m/s.

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STRUCTURAL MODELLING OF OIL SPILL CONTAINMENT BOOMS BY THE FINITE ELEMENT METHOD

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  1. Fig. 3 Stress at different stages Oil leakage (doc La Rochelle University) Up stream Float and reinforced skirt only SPH fluids flow model (doc LNHE EDF) q 7.6 Down stream add a bottom skirt chain q -22. 6 Fig 1. Boom Element Stress V=0.5 m/s Fig 2. Boom Sections Geometries V=0.3 m/s Variation vs conception Oil drop motion(doc CEDRE) Explanation vs stress Conclusions: Fig 4. Skirt Angulation • Boom modelling (coastal fluid flow Telemac2D) • Coastal zone-test choice • Industrial progress implementation STRUCTURAL MODELLING OF OIL SPILL CONTAINMENT BOOMS BY THE FINITE ELEMENT METHOD Frédéric Muttin [frederic.muttin@eigsi.fr] Farid Boushaba, Serge Nouchi Figure 3 shows boom element stress along the mathematical solution iterations. The stress forces reach progressively theirs right locations. Here the skirt bottom is reinforced. École d’Ingénieurs en Génie des Systèmes Industriels (EIGSI) 26, rue de Vaux-de-Foletier 17041 LA ROCHELLE CEDEX 1, FRANCE • SIMBAR Project http://simbar.eigsi.fr • Partnership: • EIGSI - Structural Analysis • La Rochelle University - Hydrodynamic bassin • LNHE EDF R&D - Fluid Flow Analysis • CEDRE - Expertise & Industrials Aspects • CETMEF - French Ministry / Coastal Protection • RITMER Network www.ritmer.org/fr • Ecology - Sustainable Development French Ministry • Grant n°CV03000142 This poster shows membrane finite-element computations of an oil-spill boom element. Different mechanical effects are visible with a such method. Table 1. Boom Conception Variations Table 1 shows a numerical investigation about different options of a boom conception: options in terms of stiffness, prestress, lest. Figure 4 shows the influence on the skirt angulation. An increase of the stress gradient on a skirt section results in a lower skirt angulation. Figure 1 shows up-stream and down-stream sides of a boom element of 30 m long. The model can handle the disymetrical stress levels. Figure 2 shows float and skirt sections of two kinds of boom. A solely float & skirt boom has a different motion than a boom with a chain at the bottom of its skirt. This chain concentrates the longitudinal stress.

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