DNAN基炸药空中爆炸冲击波超压相似率研究

Similarity of Shock Wave Overpressure in Air Explosion of DNAN-based Explosives

为了研究DNAN基炸药爆炸产生的冲击波在空气中的传播规律和预测不同距离的超压峰值,开展了不同量级DNAN基炸药静爆试验,获得了峰值超压、正压作用时间和正压冲量等冲击波参数;并且模拟研究了不同量级DNAN基炸药爆炸的冲击波传播过程,揭示其能量衰减规律,并将数值模拟结果和试验数据进行对比分析。结果表明:数值模拟结果与试验数据误差在10%以内,证明了计算模型和参数的合理性,建立的模型可应用于战斗部爆炸威力评估和理论计算。

In order to study the porpagation of shock wave generated by explosion of DNAN-based explosives in air,and to predict the peak overpressure at different distances,static explosion tests of DNAN-based explosives with different order were carried out,some parameters of shock wave were obtained,such as peak overpressure,positive pressure time and positive pressure impulse.Meanwhile,the propagation of shock wave by DNAN-based explosives with different order was simulated and the attenuation laws of energy shock wave were revealed.By comparing the results of numerical simulation and experimental data,the simulation results are showed agree well with experimental data and the error is less than 10%.The rationality of calculation model and parameters is proved,which indicate the model can be used to evaluate the explosive of warhead and to calculate the explosive power of warhead theoretically.