混凝土靶爆破后靶体端面振动加速度的简便算法

Simplified Calculation Method of Blast Vibration Acceleration in Concrete Target Head Face

通过爆轰波在介质分界面处作用的爆炸力学方程组推导,提出了固体介质中装药爆炸后的靶体端面振动加速度的简便计算方法。针对混凝土介质进行了爆破实验,利用实验结果对所得到的简便算法进行了验证分析。实验测得的加速度值约为1.47×105m.s-2,与简便算法得到的结果(1.73×105m.s-2)接近。研究表明简便算法计算精度满足工程设计需要;如能给出装药爆轰过程的精确p-t曲线,则可计算出装药爆炸后的固体介质内部任意处的a-t曲线。

By deduction from explosion mechanical equations of detonation wave interaction at interface,the simplified calculation method of blast vibration acceleration of target head face was put forward in solid medium after charge explosion.Blast experiments in concrete were performed,and the simplified calculation method was verified by the experimental results.The vibration acceleration value measured by the experiment was 1.47×105 m·s-2,and it was close with the result calculated by the simplified calculation method（1.73×105 m·s-2）.Results show that the accuracy of the simplified calculation method could meet the needs of engineering design,and the a-t curve of the solid medium after blast could be calculated anywhere if the exact detonation wave p-t curve is known.