TAILIEUCHUNG - Fluid-structure interaction effects during the dynamic response of clamped thin steel plates exposed to blast loading

This work presents results from a numerical investigation on the influence of fluid-structure interaction (FSI) on the dynamic response of thin steel plates subjected to blast loading. The loading was generated by a shock tube test facility designed to expose structures to blast-like loading conditions. The steel plates had an exposed area of m × m and experienced large deformations during the tests. | International Journal of Mechanical Sciences 195 2021 106263 Contents lists available at ScienceDirect International Journal of Mechanical Sciences journal homepage locate ijmecsci Fluid-structure interaction effects during the dynamic response of clamped thin steel plates exposed to blast loading Vegard Aune a b Georgios Valsamos c Folco Casadei c Magnus Langseth a b Tore Børvik a b a Structural Impact Laboratory SIMLab Department of Structural Engineering NTNU - Norwegian University of Science and Technology Trondheim Norway b Centre for Advanced Structural Analysis CASA NTNU Trondheim Norway c European Commission Joint Research Centre JRC Ispra VA Italy a r t i c l e i n f o a b s t r a c t Keywords This work presents results from a numerical investigation on the influence of fluid-structure interaction FSI on Lightweight structures the dynamic response of thin steel plates subjected to blast loading. The loading was generated by a shock tube Blast mitigation test facility designed to expose structures to blast-like loading conditions. The steel plates had an exposed area of Shock tube m m and experienced large deformations during the tests. Numerical simulations were performed using Numerical simulations the finite element code EUROPLEXUS. An uncoupled FSI approach was compared to a coupled FSI approach in EUROPLEXUS an attempt to investigate FSI effects. Reduced deformation was observed in the plates due to the occurrence of FSI during the dynamic response. The general trend was an increased FSI effect with increasing blast intensity. The numerical results were finally compared to the experimental data to validate their reliability in terms of deflections and velocities in the steel plates. A good agreement with the experimental data was found and the numerical simulations were able to predict both the dynamic response of the plate and the pressure distribution in front of the plate with good accuracy. Hence the numerical framework presented

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• Mechanical sciences
• Fluid structure interaction
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• Blast loading
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