Association Technique Maritime et Aéronautique

Numéro : 2764 - Year : 2021

IFS simulation on composite panels jib

Antoine MORVAN, Alain NÊME, Matthieu SACHER, Jean-Baptiste LEROUX, Christian JOCHUM - IRDL-CNRS UMR 6027 - ENSTA Bretagne - Brest, France

Nicolas ABIVEN - Chantiers de l'Atlantique, Saint Nazaire, France


In the framework of the Jib Sea project, funded by the Brittany Region, ENSTA Bretagne is the academic partner of a consortium including following industrial companies: Chantiers de l'Atlantique, Gsea Design and Multiplast. ENSTA Bretagne provides its expertise in the field of numerical simulation of fluid-flexible structure couplings in a stationary state. More precisely, the aim of the research conducted by ENSTA Bretagne is to validate the batten design of a jib without stay. The jib sail is made of glassepoxy composite panels (Solid Sail concept) less than half a millimeter thick and supported by a carbonepoxy frame. The simulation is performed with the industriam AbaqusTM structure code and a home-made numerical tool based on the wing theory. About 10 fluid-structure iterations (FSI) are required to obtain a very good convergence. The total computation time is about 5 minutes with a standard desktop station running 3 cores for parallelization . The good robustness and speed of the computation are mainly due to the development of lifting line and discrete vortex linear models for the fluid resolution scheme. The nonlinear structure simulation using an implicit Euler dynamic scheme with fictive shell thickness also helps to the stability of the FSI solving. A progressive sampling of batten stiffness along the longitudinal length of the panels allows to target maximum camber value and position along the jib span.


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