活性破片撞击油箱毁伤行为与机理

The ignition and damage behaviors of reactive fragments impacting fuel tanks under the coupling effect of kinetic energy and chemical energy are studied. On the basis of theoretical and experimental analysis, typical damage modes and mechanisms of reactive fragments impacting fuel tanks with different levels of fuel content are investigated. The experimental results show that reactive fragments impacting a partially-filled fuel tank at 806 - 1 331 m / s cause flash-ignition of the fuel / air layer, but the liquid fuel does not burn continuously. When the fragments hit a full-filled fuel tank at a velocity ranging from 855 m / s to 1 225 m / s, the typical damage modes are perforation, weld-seam cracking, leakage combustion, and disintegration combustion. An analysis of the experimental results and the impact response features of reactive materials reveals the damage mechanism. Based on the energy release characteristics of reactive materials, a structural failure analysis model of a full-filled fuel tank is developed. The calculation results agree well with the experimental results.