Study of explosion loads of Near-field Underwater Explosion

F J An, X Li, J Liu, C Wu

Abstract


The shock wave of near-field underwater explosion is investigated experimentally and numerically. Three TNT charge of different shapes are detonated in the water tank. The framing &scanning ultra-high speed photography system is applied to obtain the initial movement and trajectories of shock wave and detonation gas. Use the Arbitrary Lagrangian–Eulerian (ALE) method of LS-DYNA software to simulate the processes of near-field underwater explosion. Comparisons with the experimental tests are conducted to verify the results of numerical solutions. The movement characteristics of explosion loads are matched well. On the basic of experiments and simulations, the engineering formula of pressure for near-field shock wave is built.

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References


Liddiard, T.P., Forbes. A Summary Report of the Modified Gap Test and the
Underwater Sensitivity Test, NSWC TR 86-350, Naval Surface Warfare Centre,
Dahlgren, Virginia, 1987.

Gaspin J B. Depth Scaling of Underwater Explosion Phenomena. AD-A020473, 1975.

Patrick Brousseau,Helen E. Dorsett,Matthew D. Cliff. DETONATION PROPERTIES OF EXPLOSIVES CONTAINING NANOMETRIC ALUMINUM POWDER[C]. 12th International DETONATION SYMPOSIUM,2002, California:26-
36.

ZHAO Ji-bo, TAN Duo-wang, LI Jin-he, et al. Axial pressure damping of cylindrical TNT charges in the near underwater-explosion field[J]. Explosion and Shock Waves, 2008, 28, 6:539-543.

Zhang Yuanping, Li Jinhe, Gong Yanqing, et al. Measuring Study on Shock Wave
Pressure at Near一Field During Underwater Explosion[J]. Chinese Journal of Scientific Instrument, 2009, 30(6 Sup): 58-61.

LI Jin-He, ZHAO Ji-Bo, TAN Duo-Wang,et al. Effect on the Near Field Shock Wave
Pressure of Underwater Explosion of Aluminized Explosive at Different Initiation
Modes[J]. Chinese Journal of High Pressure Physics, 2012, 26(3): 289-293.




DOI: http://dx.doi.org/10.21152/1750-9548.12.2.117

Copyright (c) 2018 F J An, X Li, J Liu, C Wu

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