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Modélisation des effets d'une onde de souffle sur les structures de génie civil : de l'explosif à l'interaction fluide-structure

Abstract : Numerical simulation of blast wave loaded structures required large amount of CPU time in order to achieve reasonable accuracy. Today, there is a trade off needing between accuracy and CPU time, this PhD suggest differents numerical models to enhance the simulation. In the first time, the current methods are evaluated in comparison with experimental data of pressure and displacement recorded on shock tube experiments. In this particular case, the numerical simulation is showing good accuracy. Based on these results, the detonation process is replaced the relaxation of high pressure gas. This method reduces the high pressure gradient at the beginning of the blast wave and thus increase the accuracy at latter stages. The second model consist in overlooking the fluid structure interaction. Both of this models have been studied thanks to a parametric studies showing the accuracy loss. Then the relevant physical parameters for the influence of both simplifcation are extracted and evaluated.
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  • HAL Id : tel-03387797, version 1

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Pierre Legrand. Modélisation des effets d'une onde de souffle sur les structures de génie civil : de l'explosif à l'interaction fluide-structure. Génie civil. ENSTA Bretagne - École nationale supérieure de techniques avancées Bretagne, 2020. Français. ⟨NNT : 2020ENTA0010⟩. ⟨tel-03387797⟩

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