爆炸式防暴弹的弹体爆炸模型及其数值模拟

The Explosion Model and Numerical Simulation of Explosive Anti-riots Munition

从流体力学的观点出发,建立了爆炸式防暴弹的弹体爆炸模型,根据需要在一维情形下对各种条件做了一定的简化,最后用有限元方法求解了该问题的近似解,根据米赛斯屈服准则得到了不同材料动态屈服应力条件下的速度分布。认为弹体爆轰产物的整体速度值的大小主要受初始速度值和瞬时爆轰压力的影响,在相同条件下,弹体越厚,破裂半径越小,速度递减得越快。

From the viewpoint of hydrodynamics, the explosion model of explosive anti-riots munition is established and a variety of conditions are certainly simplified according to the needs of one-dimensional cases. At last. the approximate solution of the problem is got by the finite dement method, and the velocity distribution under the condition of dynamic yield stress of different materials is got according to Mises yield criterion. It is thought that the overall velocity of detonation products is mainly affected by the initial value of detonation velocity and instantaneous pressure. Under the same condition, the thicker the body is, the smaller the burst radius is, the faster the decline rate of velocity is.