HAL CCSD
Replacing Detonation by Compressed Balloon Approaches in Finite Element Models
Legrand, Pierre
Kerampran, Steven
Arrigoni, M.
Sixense Necs
Institut de Recherche Dupuy de Lôme (IRDL) ; École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Centre National de la Recherche Scientifique (CNRS)
International audience
Advances in Civil Engineering
hal-02890994
https://hal.science/hal-02890994
https://hal.science/hal-02890994
Advances in Civil Engineering, 2020, Advancements in the Analysis and Design of Protective Structures against Extreme Loadings 2020, 2020, pp.1497632-1 - 1497632-16. ⟨10.1155/2020/1497632⟩
DOI: 10.1155/2020/1497632
info:eu-repo/semantics/altIdentifier/doi/10.1155/2020/1497632
en
Spherical charge
Compressed balloon model
Explosive device
Detonation
Blast effects
Buildings
Finite element methods
[SPI]Engineering Sciences [physics]
[SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment
info:eu-repo/semantics/article
Journal articles
The evaluation of blast effects from malicious or accidental detonation of an explosive device is really challenging especially on large buildings. Indeed, the time and space scales of the explosion together with the chemical reactions and fluid mechanics make the numerical model really difficult to achieve acceptable structural design. Nevertheless, finite element methods and especially Arbitrary Lagrangian Eulerian (ALE) have been extensively used in the past few decades with some simplifications. Among them, the replacement of the explosive event by a compressed balloon of detonation products has been proven useful in numerous different situations. Unfortunately, the ALE algorithm does not achieve a proper energy balance through the numerical integration of the discrete scheme; this important drawback is not compensated by the use of the classical compressed balloon approach. The paper focuses on increasing the radius of the equivalent ideal gas balloon in order to achieve better energy balance and thus better results at later stages of the blast wave propagation.
2020-11