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Verification of the Theoretical Feasibility of Shock Wave Attenuation by Means of a Second Transient Medium for Protecting Vehicles Against Blasts

Authors:
Burghard Hillig
Arash Ramezani
Hendrik Rothe

Keywords: -shock wave interaction; shock wave attenuation; blast shield; pressure profile; vehicle protection; simulation setup; ANSYS AUTODYN; Lagrange; Euler

Abstract:
This paper describes the numerical investigations of a directed blast of 12.5 kg Pentaerithrytoltetranitrate and the propagation of the resulting shock wave in the direction of a vehicle model. The results are intended to answer the question as to whether and to what extent the rapid heating of the ambient air as an attenuation area for shock waves offers the possibility to protect vehicles, structures and personnel. For that, a second transient medium with increased internal energy is created in the simulation from the ambient air by increasing the temperature at ambient pressure. The changes in the pressure profile of the shock waves are simulated in a developed test set-up and recorded by pressure gauges. In this case, a reduction of the peak pressure compared to the undisturbed propagation of the shock wave could be determined by about 15 % when heated to 3000 K.

Pages: 68 to 73

Copyright: Copyright (c) IARIA, 2017

Publication date: October 8, 2017

Published in: conference

ISSN: 2308-4537

ISBN: 978-1-61208-594-4

Location: Athens, Greece

Dates: from October 8, 2017 to October 12, 2017