动能侵彻体冲击带壳炸药装药的爆燃失效

Deflagration Failure of Explosive Cased Charge Under Impact of Kinetic Energy Penetrators

针对动能侵彻体冲击下带壳炸药装药的失效问题,分析了炸药装药不同反应情况驱动壳体速度,提出用等效格尼速度或等效格尼能表征炸药装药失效等级,相应给出了求解等效格尼速度和等效格尼能的方法。基于等效格尼速度对带壳炸药装药失效等级进行了划分并得到判据,提出爆燃失效是一种有效的失效理念。结合实验、数值模拟和解析计算研究了动能侵彻体冲击下带壳B炸药的爆燃失效问题,分析了爆燃失效与正常爆轰失效的关系,结果显示当等效格尼速度约为正常爆轰反应条件下的1%时,可视为邻近炸药装药爆燃失效的下限值。

Aiming at the failure problem of cased explosive charge under impact of kinetic energy penetrators,the velocity of case driven by explosive charge under different reaction rate was analyzed. The grade of characterizing explosive charge failure was proposed using equivalent gurney velocity or equivalent gurney energy. The method of solving equivalent gurney velocity and equivalent gurney energy was given accordingly. Based on equivalent gurney velocity,the failure grades of cased explosive charge were divided and the criterion was given ,the idea of deflagration failure is proposed which is considered to be more effective to realize. The deflagration failure problem of cased composition B under impact of kinetic energy penetrators was studied based on experimental tests,numerical simulation and analytical calculation. The relations between deflagration failure and normal detonation failure were analyzed and the lower limit value of deflagration failure criterion was given. The results shows that it can be regarded as the lower limit of deflagration failure of explosive when equivalent gurney velocity reaches 1% of gurney velocity.