Research on the distribution characteristics of explosive shock waves at different altitudes

Abstract

There are great differences in the distribution characteristics of shock waves produced by ammunition explosions at different altitudes. At present, there are many studies on plain explosion shock waves, but there are few studies on the distribution characteristics of plateau explosion shock waves, and there is still a lack of complete analysis and evaluation methods. This paper compares and analyzes shock wave overpressure data at different altitudes, obtains the attenuation effect of different altitudes on the shock wave propagation process and proposes a calculation formula for shock wave overpressure considering the effect of altitude. The data analysis results show that at the same TNT equivalent and the same distance from the measuring point, the shock wave overpressure at high altitude is lower than that at low altitude. With the increase in the explosion center distance of the measuring point, the peak attenuation rate of the shock wave overpressure at high altitudes is smaller than that at low altitudes, and the peak attenuation rate of the shock wave overpressure at high altitudes gradually intensifies with increasing proportional distance. The average error between the shock wave overpressure and measured shock wave overpressure in a high-altitude environment obtained by using the above calculation formula is 11.1389%. Therefore, this method can effectively predict explosion shock wave overpressure in plateau environments and provides an effective calculation method for practical engineering tests.

Keywords

• Shock wave overpressure calculation
• Pressure attenuation law
• Altitude correction factor
• Engineering numerical model