半球形炸药部件跌落应力分析

Stress Analysis of Dropping of Hemispherical Explosive Part

利用有限元软件ANSYS WORKBENCH对该炸药部件进行有限元建模,仿真计算了该炸药部件以大端着地、小端着地、侧面着地3种典型姿态跌落时应力分布。结果表明:不论在何种姿态下,该炸药部件从1 m处跌落产生的最大应力值都远小于炸药的爆炸极限应力,炸药处于安全范围,不会发生爆炸;跌落所差生的最大应力大于该炸药结构的屈服应力,炸药部件结构受到破坏;在地面上增设泡沫垫层,能使炸药部件跌落产生的应力小于屈服极限,保护炸药部件.

The finite element modeling of the explosive part was carried out by using the finite element software ANSYS WORKBENCH.The stress distribution of the explosive part in three typical attitudes such as big-end-landing,small-end-landing and side-landing was simulated.The results show that the maximum stress value of the explosive part when falling from 1 m is greater than the yield stress of the explosive material regardless of the attitude,so the structure of the explosive part will be damaged.However,the maximum stress value caused by the explosive dropping is much lower than the explosive limit stress of the explosive material,so it is still in a safe range and will not explode.When a foam cushion is added to the ground,the explosive part is less stressed than the stress yield limit when it is dropped,thereby the explosive part is protected.