爆炸碎片抛射速度及飞行轨迹分析方法

通过对爆炸碎片生成特点及飞行规律的分析，建立了爆炸碎片速度及飞行轨迹分析方法。根据爆生产物膨胀做功原理及多方过程状态方程，推导了爆炸碎片抛射初速度计算公式；在爆炸碎片进行抛射飞行阶段后，根据碎片在重力及空气阻力作用下加速度变化规律，通过对飞行过程中加速度方程的推导及边界条件的确定，确定了爆炸碎片飞行轨迹及飞行速度的分析过程。该方法能够分析得到爆炸碎片影响范围、破坏性等相关信息，进而可以为定量分析爆炸碎片诱发多米诺效应奠定基础。

Methodology of Projection Velocity and Trajectory Analysis to Explosive Fragments

According to analysis to fragments generation and projection rules, methodology to analyze velocity and trajectory of fragments is established. The formulas to achieve initial projection velocity of the fragment are deducted by combining the polytropic process state equations and the work done by explosive gases pressure. According to the variation of acting forces in the projection process, the acceleration equations are solved and the projection velocity and trajectory of the projection stage can be analyzed by the determination of boundary conditions of the velocity and trajectory. The results of projection velocity and trajectory analysis of explosive fragments can provide the basis of the analysis of domino effect caused by explosive fragments.