舱内爆炸准静态压力形成机理的研究

Theoretical and Experimental Study on Formation of Quasi-static Pressure in Internal Blast

舱内爆炸准静态压力载荷是反舰导弹半穿甲战斗部最重要的破坏载荷之一。基于炸药爆炸过程中的化学反应过程和状态方程开展了准静态压力的理论分析与预测,并通过模型试验验证预测公式的正确性,讨论了在有无氧气环境下的准静态压力。研究结果表明:(1)舱内爆炸与自由场爆炸有较大的不同,除了多次反射的冲击波外,还存在准静态压力;(2)基于状态方程提出的准静态压力计算方法具有一定的预测能力;(3)需要氧气支撑的后续燃烧效应对准静态压力的形成至关重要。研究结果能为舱内爆炸作用下的舱室毁伤防护机理的揭示和防护设计提供有效支撑。

Quasi-static pressure is one of the most important damage loads by semi-armour-piercing warhead of anti-ship missile.Based on the chemical reaction and the state equation in explosion,a formula for prediction of the quasi-static pressure was presented and verified with the model test.Difference of the quasi-static pressure between presence and absence of oxygen was discussed.The results show that:(1)explosion in a cabin is quite different from that in the free field,besides the multiple reflected shock waves,there is quasi-static pressure in the cabin;(2)the state equation based calculation of quasi-static pressure has certain ability in prediction;(3)the effect of subsequent combustion supported by oxygen is very important in the formation of quasi-static pressure.The research may provide effective support for revealing the mechanism of damage protection and design of the cabin.