Waveform Reconstruction Method for Prescribed Experimental Blast Conditions in Numerical Simulations


  1. Josey, T.
  2. Donahue, L.
Corporate Authors
Defence Research and Development Canada, Suffield Research Centre, Ralston AB (CAN);Lloyd's Register Applied Technology Group, Halifax NS (CAN)
Shock and blast tubes are often used to investigate shock-wave phenomenology, study the response of test articles, predict injury and evaluate the effectiveness of armour. Complementary numerical simulation work is often performed to gain a further understanding of the experimental observations, to visualize and predict the loading conditions and to predict structural response. For such studies, it is important that the numerical technique replicate the particular incident conditions produced in the test. A technique has been developed that involves a merger between pure experimental measurements and numerical simulations, allowing the numerical predictions to more accurately reflect those of the physical experiment. Measurement of the static pressure is relatively straightforward, and initialization of numerical simulations using experimental pressure measurements from upstream gauges has several advantages. However, measurements of static pressure alone do not fully define the characteristics of a blast wave, and therefore inaccuracies will result if pressure alone is used as input. In particular the dynamic pressure component of the blast, shown to play a significant role in the loading and mechanisms of blast injury, will not be accurately captured. An algorithm is described to reconstruct a fully-defined waveform (i.e. a combination of pressure, density, and particle/flow velocity) from an experimental pressure measurement. The resulting waveform can be applied as a time
blast;shock tube;shock wave;computational
Report Number
DRDC-RDDC-2017-P125 — External Literature
Date of publication
01 Dec 2017
Number of Pages
Electronic Document(PDF)

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