Detonation Output Properties of D-shape Structure

Ji-feng WEI; Chao Zhang; Shu-Shan Wang

doi:10.14429/dsj.64.4746

Ji-feng WEI Beijing Institute of Technology, Beijing
Chao Zhang Beijing Institute of Technology, Beijing
Shu-Shan Wang Beijing Institute of Technology, Beijing

DOI: https://doi.org/10.14429/dsj.64.4746

Keywords: Detonation wave, initiation modes, wavefront profile, distribution density, numerical simulation

Abstract

The detonation wave propagation and output properties have been analyzed for D-shape structure. Four initiation modes were designed to compare wavefront profiles and output pressure distribution. Simulation results show that three-array-nine-point initiation mode (Mode-III) brings about the most match-up wave front for D-shape structure. Detonation output properties have great influence on fragment ejection velocity and distribution density. The statistical results reveal that fragment parameters of Mode-III are the largest. Compared with Mode-III, the kinetic energies of other three modes decrease by 31.6 per cent, 19.6 per cent, 4.5 per cent, respectively. The computational values and normal curve of fragments distribution are obtained. From these analyses, it can be concluded that initiation mode has great influence on output parameters of fragments. With the optimal initiation Mode-III, ideal hitting angle should be within the range of -10° to 10°, the probability of distribution density would be close to 70 per cent.

Defence Science Journal, Vol. 64, No. 5, September 2014, pp.484-489, DOI:http://dx.doi.org/10.14429/dsj.64.4746

Author Biographies

Ji-feng WEI, Beijing Institute of Technology, Beijing

Dr Ji-Feng Wei, PhD, is presently working as an Associate Professor in the School of Mechatronical E Engineering at Beijing Institute of Technology, Beijing, China. H He teaches impact mechanics and structural design. His research interests include: explosion mechanics, FE Analysis and impact mechanics.

Chao Zhang, Beijing Institute of Technology, Beijing

Mr Chao Zhang is currently a PhD student at the Beijing Institute of Technology, China. His current research interests include: detonation theory and technology, high-speed penetration and collision, shaped charge, and numerical simulation technology.

Shu-Shan Wang, Beijing Institute of Technology, Beijing

Dr Shu-Shan Wang, PhD, is currently a Professor in the School of Mechatronical Engineering at Beijing Institute of Technology, China. He teaches terminal effect and structural design. His research interests include: explosion mechanics, impact mechanics and terminal damage effect.