球形爆炸荷载作用下防护平板试验及模型研究

Test and Model Study of Protective Plate under Spherical Explosion Load

摘要: 球形装药在空气中爆炸，产生的冲击波与平板障碍物碰撞产生的反射超压在防护结构中一般是需要进行控制的，反射超压准确计算与否对于校核结构强度具有极其重要的作用。球形装药在空气中中心起爆之后，经过一球面波传播到平板表面产生一反射波。本文将通过平板反射试验验证了爆炸罐内爆下冲击波压力测试系统的准确性及可靠性，并通过数值模拟进行平板反射试验分析爆炸波通过平板反射后的传播情况，建立了比较符合测试实际的计算模型。计算结果表明，平板试验结果和理论计算值之间误差较小，全部在10%以内，且对称测点的实测结果一致性较好，可以认为构建的冲击波测试系统能够满足圆柱形爆炸容器壳体内壁反射冲击波测试的试验要求。

Abstract: The overpressure caused by the collision between the shock wave generated by the spherical charge exploding in the air and the flat plate obstacle is generally required to be controlled in the protection structure. After the spherical charge detonates in the center of the air, a reflected wave propagates to the surface of the plate through a spherical wave. In this paper, the accuracy and reliability of the pressure test system of shock wave under the implosion of the explosive tank are verified by the plate reflection test. The calculation results show that the error between the plate test results and the theoretical calculation values is small, all within 10%, and the measured results of symmetrical measurement points are consistent with each other. It can be considered that the shockwave test system constructed can meet the test requirements of the reflection shockwave test on the inner wall of the cylindrical explosive vessel shell.