A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Numerical modeling of close-in detonations of high explosives
Highlights AUTODYN is verified in 1D for near-field airblast calculations. Cell sizes for CFD analysis are recommended for radial expansions of less than 10. Recommendations are provided for minimum domain size for 3D analysis. Widely adopted pressure-history equations are not appropriate in the near field. Afterburning increases the impulse, but the effect is small in the near field.
Abstract The effects of close-in detonations of high explosives are characterized in terms of incident and reflected overpressures and impulses. Studies are performed using a verified (1D) and validated (2D) CFD code. Calculations are performed to verify the code in 1D, estimate blast effects using 1D models, predict incident overpressures and impulses in the near field, provide guidance on the use of reflecting and transmitting boundaries in 2D and 3D models, provide recommendations on cell size, and predict reflected overpressures on a rigid reflecting surface for close-in detonations. Contact detonations and their effects are not modeled. The complex wave field in the Mach stem region is studied.
Numerical modeling of close-in detonations of high explosives
Highlights AUTODYN is verified in 1D for near-field airblast calculations. Cell sizes for CFD analysis are recommended for radial expansions of less than 10. Recommendations are provided for minimum domain size for 3D analysis. Widely adopted pressure-history equations are not appropriate in the near field. Afterburning increases the impulse, but the effect is small in the near field.
Abstract The effects of close-in detonations of high explosives are characterized in terms of incident and reflected overpressures and impulses. Studies are performed using a verified (1D) and validated (2D) CFD code. Calculations are performed to verify the code in 1D, estimate blast effects using 1D models, predict incident overpressures and impulses in the near field, provide guidance on the use of reflecting and transmitting boundaries in 2D and 3D models, provide recommendations on cell size, and predict reflected overpressures on a rigid reflecting surface for close-in detonations. Contact detonations and their effects are not modeled. The complex wave field in the Mach stem region is studied.
Numerical modeling of close-in detonations of high explosives
Shin, Jinwon (author) / Whittaker, Andrew S. (author) / Cormie, David (author) / Wilkinson, Will (author)
Engineering Structures ; 81 ; 88-97
2014-09-13
10 pages
Article (Journal)
Electronic Resource
English
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