为研究不同装药结构对灭火弹灭火剂爆轰抛撒作用的影响,为灭火弹装药结构设计提供依据。通过TrueGrid软件建立中心装药、柱状装药、底部装药和底部中心装药的灭火弹仿真模型,利用LS-DYNA软件模拟其抛撒过程。并对中心装药和柱状装药的抛撒过程进行取点跟踪分析。结果表明:柱状装药结构爆轰模型呈圆柱形,灭火剂粒子在轴向和径向上都分散得较均匀,且在径向上形成了明显的速度梯度,灭火效果更好。故选择柱状装药结构设计灭火弹。

In order to study the influence of different charging structures of the explosion and scatters effect of fire extinguishing agent and provide a basis of the design of the actual fire extinguishing charge structure. Using the TrueGrid software established the fire extinguishing projectile simulation model of center charge structure, column charge structure, bottom charge structure and bottom center charge structure, and through LS-DYNA simulate the process. Tracking and analyzing the dispersing process of the center charge structure and the column charge structure simulation model. The results show that:The columnar charge structure is cylindrical, and the fire extinguishing agent particles are evenly dispersed in the axial and radial directions, and a clear velocity gradient is formed in the radial direction, the fire extinguishing effect is better. So the column charge structure is a preferred choice to design the fire extinguishing projectile.