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Impact of a shock wave on a structure on explosion at altitude


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Titre de la revue : Journal of Loss Prevention in the Process Industries
Volume : 20
N° : 4-6
Pagination : 509-516
Date de publication : 01/07/2007

Type de document > *Article de revue

Mots clés > détonation gaz, interaction structure, ondes de choc

Unité de recherche > IRSN/DEND/SATE

Auteurs > AUTRUSSON Bruno, CHEVAL Karine, LOISEAU Olivier, SOCHET Isabelle, TRELAT Sophie

Date de publication > 01/07/2007

Résumé

The number of explosive attacks on civilian buildings has recently increased and the pattern of damage inflicted on structures when an explosion takes place at altitude remains quite difficult to predict. The primary aim of the work reported here was to enhance the understanding of how blast waves from an explosion at altitude interact with the ground and with a structure. Small-scale experiments were conducted using a propane-oxygen stoichiometric mixture as explosive. This approach is original because it models high-explosive detonation in terms of gaseous charge explosion using TNT equivalents. Several non-dimensional laws are expressed and validated by experiments. These relationships allow determination of the propagation of a blast wave and its interaction with a structure as a function of the position of the explosive charge when the explosion occurs at altitude. Then, from knowledge of the blast loading, using Hopkinson's scaling law and TNT equivalents, we can predict the interaction of blast waves with the ground and a structure on a real scale. Simulations were performed using the Autodyn code, and good correlation with the experimental results was obtained.

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