摘要
为了弄清装药位置及形状对某坑道中冲击波压力传播规律的影响,基于Hopk inson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及形状情况下,长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,整体上看,柱状装药的压力较大;在爆炸近区,装药位置及形状对预测结果的影响显著。随着传播距离的增加,这种影响越来越小。研究方法和数据可供类似工程问题参考。
In order to clearly understand the influence of location and form of HE-charges on the air blast pressure inside a tunnel, on the basis of Hopkinson scaling law, the attenuation of air blast peak pressures in the long tunnel due to HE-detonations outside the tunnel entrance in the case of different location and form is simulated with the dynamic finite element software of LS-DYNA. Results are compared with other experimental methods. Results indicate that the influence of location and form of HE-charges is significant near the explosive. But the influence becomes smaller as the distance from the explosives larger and larger. The methods and data presented in this paper can be refereed in similar engineering.
出处
《爆破》
CSCD
2005年第4期18-22,共5页
Blasting
关键词
坑道
冲击波
动力有限元
tunnel
shock wave
dynamic finite element
