森林火灾中高空投掷式灭火弹土中爆炸效果试验研究

Experimental research on explosion effect of high-altitude throwing fire-extinguishing bomb in forest fire

文章为研究森林火灾中灭火弹不同初始条件爆炸成坑大小的影响,运用Autodyn仿真软件建立SPH-FEM数值模型,模拟灭火弹侵彻土体爆炸的过程。建立了3种投弹高度的重力侵彻模型,研究弹体重力侵彻土壤作用过程,分析投弹高度对重力侵入深度的影响规律,并进行现场试验,对比研究不同灭火弹的爆炸效果。

In order to study the effect of the explosion crater size of fire extinguishing bombs under different initial conditions in forest fires,the SPH-FEM numerical model is established by using Autodyn simulation software to simulate the process of fire extinguishing bombs penetrating the soil and exploding.The gravity penetration model of three bomb-dropping heights is established to study the action process of the bomb’s gravity penetration into the soil,and the influence of the bomb-dropping height on the gravity penetration depth is analyzed.