Propagation Characteristics of Explosive Waves in Layered Media Numerical Analysis

Xia Changjing; Dong Yongxiang; Chen Liping; Xue Dongjie; Wang Shunhong

doi:10.14429/dsj.59.1551

Xia Changjing China University of Mining & Technology, Beijing
Dong Yongxiang China University of Mining & Technology, Beijing
Chen Liping China University of Mining & Technology, Beijing
Xue Dongjie China University of Mining & Technology, Beijing
Wang Shunhong Beijing Institute of Technology, Beijing

DOI: https://doi.org/10.14429/dsj.59.1551

Keywords: Explosive wave, layered media, wave impedance, numerical simulation, explosive wave propagation

Abstract

The layered media under one-dimensional strain with different wave-impedance materials have been studied. The three typical prototypes have been analysized, including steel plate, aluminum foam, and concrete as the middle layer, and the upper and lower layers are concrete material. The attenuation of the amplitude of stress at different positions, the peak stress and the duration at the dissimilar material interface, and the absorbing energy distribution in different layers for different models have been obtained by numerical simulation. The material of the middle layer with lower impedance can effectively reduce the amplitude of stress, increase the duration of explosive wave, and change the distribution of energy in different layers. But the influence of the middle layer with higher impedance material on layered media is contrary. The middle layer with soft material is the better matching of wave impedance to explosive wave propagation. The analytical conclusions are of great significance for the design of protective structures against the explosion-induced hazards and mine
safety protection from outburst and explosion.

Defence Science Journal, 2009, 59(5), pp.499-504, DOI:http://dx.doi.org/10.14429/dsj.59.1551

Author Biographies

Xia Changjing, China University of Mining & Technology, Beijing

State Key Laboratory of Coal Resource and Mine Safety, China University of Mining & Technology, Beijing-100083

Dong Yongxiang, China University of Mining & Technology, Beijing

State Key Laboratory of Coal Resource and Mine Safety, China University of Mining & Technology, Beijing-100083

Chen Liping, China University of Mining & Technology, Beijing

State Key Laboratory of Coal Resource and Mine Safety, China University of Mining & Technology, Beijing-100083

Xue Dongjie, China University of Mining & Technology, Beijing

State Key Laboratory of Coal Resource and Mine Safety, China University of Mining & Technology, Beijing-100083

Wang Shunhong, Beijing Institute of Technology, Beijing

State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing-100081