High Fidelity Simulation of Free-field Blast Loading – The Importance of Dynamic Pressure


  1. Josey, T.
  2. Sawyer, T.W.
  3. Ritzel, D.
  4. Donahue, L.
Corporate Authors
Defence Research and Development Canada, Suffield Research Centre, Ralston AB (CAN);Dyn-FX Consulting Limited, Amherstburg ON (CAN);Lloyd's Register Applied Technology Group, Halifax NS (CAN)
The increased incidence of blast-induced traumatic brain injury (bTBI), in part due to increased survivability resulting from improved personnel protection, has spurred research efforts to gain a better understanding of this injury. This laboratory has taken a multidisciplinary approach using models of increasing complexity, beginning with the development of an Advanced Blast Simulator (ABS), which enables high-fidelity simulation of free-field blast waves, including sharply defined static overpressure rise times, underpressure and secondary shock waves. These aspects of the ABS in themselves satisfy most goals of blast effects research, which generally seek to validate their exposures through comparison of the incident (static) pressures and durations to a free-field blast wave. However, it is critical to note that the dynamic pressure component of a blast wave can play a significant role in the loading of a given specimen yet is often neglected in measurements. Numerical simulations show that the dynamic component of blast can be highly variable within a shock tube particularly due to open-end effects. Testing near the open end location should particularly be avoided if the researcher is trying to replicate realistic primary blast scenarios from representative IEDs. A miniature probe has been developed and adapted from a catheter pressure transducer and is capable of measuring the shock tube blast conditions including the static and total dynamic pressure components to allo
blast;shock tube;shock wave;computational
Report Number
DRDC-RDDC-2018-P003 — External Literature
Date of publication
01 Jan 2018
Number of Pages
Electronic Document(PDF)

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