装药位置对坑道中冲击波传播规律的影响

为了弄清装药位置及形状对坑道中冲击波传播规律的影响，基于Hopkinson比例定律，用LS—DYNA动力有限元软件较为系统地研究了不同装药位置和装药形状情况下，坑道中冲击波峰值压力的传播规律，计算结果与其他经验方法的预测结果进行了比较．研究表明，在爆炸近区，装药位置及形状对预测结果均有明显影响；随着传播距离的增加，装药位置的影响越来越小，而装药形状的影响却变得突出．研究结果可供类似问题的研究及防护门的设计参考．

Influence of Location and Form of HE-charges on the Air Blast Pressure Inside the Tunnel

In order to understand clearly to the influence of location and form of HE-charges on the air blast pressure inside the tunnel, based on Hopkinson scaling law, attenuation of air blast peak pressures in long tunnels due to HE-detonations in the case of different location and form at the tunnel entrance is simulated with the dynamic finite element software of LS-DYNA. The results are compared with other experimental methods. The results indicate that the influence of location and form of HE-charges is significant near the HE-charges. As the distance from the HE-charges larger and larger, the influence of location of HE-charges is smaller and smaller, but the influence of form of HE-charges is larger and larger. The methods and data presented can be refereed in similar engineering and determination of loadings upon protective doors.