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Computational Modeling of Recoilless Weapons Combat Training-Associated Blast Exposure

  • S. WiriEmail author
  • A. Ritter
  • J. Bailie
  • C. Needham
  • J. Duckworth
Conference paper

Abstract

Military personnel are routinely exposed to blast as part of routine combat training with shoulder-fired weapons. Scientific, medical, and military leaders are beginning to recognize that use of shoulder-fired weapons may result in acute and potentially long-term physiological effects. However, the back blast generated from shoulder-fired weapons on the weapon operator has not been well characterized. By quantifying and modeling the full-body blast exposure from these weapons, better injury correlations can be constructed.

Blast exposure data from the Carl Gustav and Shoulder-Launched Multipurpose Assault Weapon (SMAW) were used to reverse engineer source terms for computational simulations of blast exposure on operators of these shoulder-mounted weapon systems. A propellant burn model provided the source term for each weapon to capture blast effects. Blast data from personnel-mounted gauges during routine training was used to create initial, high-fidelity 3D computational fluid dynamic simulations using SHAMRC. These models were then improved upon using data collected from static gauges positioned around the individual weapons systems. The final simulation models for both the Carl Gustav and SMAW were in good agreement with the data collected from the personnel-mounted and static pressure gauges. Using the final simulation results, contour maps for peak overpressure and peak overpressure impulse on the gunner and assistant gunner for each weapon system were then created.

Reconstruction of the full-body blast loading enables a more accurate assessment of blast exposure which could be used to correlate with injury. By accurately understanding the blast exposure and its variations across an individual, more meaningful correlations with injuries including traumatic brain injury can be established. As blast injury thresholds become better defined, results from these reconstructions can provide important insights into approaches for reducing risk of injury to personnel operating shoulder-launched weapons.

Notes

Acknowledgments

Defense Advanced Research Projects Agency HU0001-14-1-0022, PI: J. Duckworth

References

  1. 1.
    G. Harish, A. Mahadevan, N. Pruthi, S.K. Sreenivasamurthy, V.N. Puttamallesh, T.S. Keshava Prasad, S.K. Shankar, M.M. Srinivas Bharath, Characterization of traumatic brain injury in human brains reveals distinct cellular and molecular changes in contusion and pericontusion. J. Neurochem 134, 156–172 (2015). https://doi.org/10.1111/jnc.13082 CrossRefGoogle Scholar
  2. 2.
    M.A. Hemphill, S. Dauth, C.J. Yu, B.E. Dabiri, K.K. Parker, Traumatic brain injury and the neuronal microenvironment: A potential role for neuropathological mechanotransduction. Neuron 85(6), 1177–1192 (2015). ISSN 0896-6273, https://doi.org/10.1016/j.neuron.2015.02.041., http://www.sciencedirect.com/science/article/pii/S0896627315001567 CrossRefGoogle Scholar
  3. 3.
    J.E. Crepeau, C.E. Needham, Verification and validation of SHAMRC for non-ideal Airblast (NIAB) phenomenology, in Technical Report, vol. 2. Defense Threat Reduction Agency (2010)Google Scholar
  4. 4.
    S. Wiri, C. Needham, Reconstruction of improvised explosive device blast loading to personnel in the open. Shock Waves 26(3), 279–286 (2016). https://doi.org/10.1007/s00193-016-0644-1 CrossRefGoogle Scholar
  5. 5.
    X.G. Tan, A.J. Przekwas, G. Rule, K. Iyer, K. Ott, A. Merkle, Modeling articulated human body dynamics under a representative blast loading, in ASME International Mechanical Engineering Congress and Exposition, Denver, CO, 2011. Biomedical and Biotechnology Engineering: Nanoengineering for Medicine and Biology, pp. 71–78. ASMEGoogle Scholar

Copyright information

© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  • S. Wiri
    • 1
    Email author
  • A. Ritter
    • 2
    • 3
  • J. Bailie
    • 4
    • 5
    • 6
    • 7
  • C. Needham
    • 1
  • J. Duckworth
    • 2
  1. 1.Applied Research AssociatesAlbuquerqueUSA
  2. 2.Uniformed Services University of the Health SciencesBethesdaUSA
  3. 3.The Henry M. Jackson Foundation for the Advancement of Military MedicineBethesdaUSA
  4. 4.Defense and Veterans Brain Injury CenterSilver SpringUSA
  5. 5.Defense and Veterans Brain Injury CenterCamp PendletonUSA
  6. 6.Naval Hospital Camp PendletonCamp PendletonUSA
  7. 7.General Dynamics Health SolutionsFairfaxUSA

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