{"id":{"repo_id":"liege","oai_identifier":"oai:orbi.ulg.ac.be:2268/16082"},"canonical_url":"https://search.dev.ndltd.org/etd/liege/oai:orbi.ulg.ac.be:2268/16082","repository":{"repo_id":"liege","name":"Université de Liège","base_url":"https://orbi.uliege.be/oai/request"},"display":{"title":"Modélisation de problèmes hydroélastiques par éléments finis. Application aux lanceurs aérospatiaux","abstract":"This thesis is devoted to the finite element analysis of hydro-elastic vibrations arising in launchers. It sets a general formulation generalizing Tong's one by a logical step in a lagrangian point of view. A specialized solution algorithm is presented. As launchers are axisymmetric structures, a general theory of axisymmetric structures with cosinusoidal modes is presented, including shells, volumes, and incompressible structures. The problem of setting the ccorrest limiting conditions on the axis is treated. 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