Shock Wave Attenuation In Aqueous Foam
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83 - 92
L. Domergue, R. Nicolas, J.-C. Marle, L. Matthey, M. D'aloisio, L. Buche & C. Hubert
The capacity of aqueous foam to decrease the pressure produced by explosive material in close proximity areas is well known. This paper presents some results of shock wave attenuation obtained in aqueous foam during explosive experiments. We conducted our experiments in two steps: Firstly, a spherical device of 6.6 kg of Plastrite (pentrite based explosive substance) was held at a height of 2 meters and initiated at its centre in an open air range. The evolution of pressure was measured by means of seven PCB pressure pencil gauges at the same height, and at various ranges from 2 to 5 meters. Secondly, a wide structure was filled with aqueous foam at an average density of 1:125 and the same test was performed inside the foam. The results of those tests are discussed in terms of the overpressure, Time of Arrival and blast wave velocity in each case. The results are compared to relevant literature at every step. Furthermore, the results between the two tests are compared to reach a conclusion on the capacity of aqueous foam required to decrease blast effects on a structure. Keywords: shock wave attenuation, foam capacity, overpressure, velocity of shock wave.
shock wave attenuation, foam capacity, overpressure, velocity of shock wave