Aeroelasticity and Structural Dynamics
Methods and Simulation Codes for Inelastic Analysis, Damage, Failure and Crash
Vulnerability of Structures Subjected to Explosions in the Air
Onera is interested in the development of methodologies for analyzing numerically the problem of dynamic ruin of a structure subject to the pulsed pressure field generated by the detonation of an explosive. The approach is based mainly on the use of a finite element code of structural analysis integrating various fluid and solid functionalities. To do this, a simplified (but deformable) model of the structure is placed in a refined mesh of the surrounding fluid (decoupled meshes). The modeling of the fluid's behavior is based on the use of a viscous hydrodynamic law. The explosion is modeled by deposit (and release) of an initial energy in the region of the mesh corresponding to the explosive. The coupling between the fluid and solid domains is managed by interfaces allowing the fluid and solid media to interact on each other and to deform. The method developed can be applied to the simulation of an explosion under a wheel, a submarine explosion, or an explosion in an aircraft baggage compartment container.
References
[1] B. Langrand et S. Martin, Méthodologie et outils d'analyse du comportement et de la ruine des structures soumises aux explosions, Revue Scientifique et Technique de Défense 56(2) (2002) 16-21.
[2] B. Langrand, E. Deletombe, J-L. Charles, J-F. Sobry, S. Martin, and H. Chazal, Armoured vehicles subject to mine explosions – An analysis method for operationability and survivability, Journal de Physique IV 110(2003) 621-626
