摘要
为了对坑道中的防护门抗化爆冲击波效果进行有效的设计,首先需要确切知道通道中自由场压力的传播规律。基于Hopk inson比例定律,用LS-D yna动力有限元软件模拟了常规炸药在坑道入口外爆炸情况下,长坑道中冲击波峰值压力的衰减规律。模拟结果与其它经验方法的预测结果进行了比较,可为进一步研究确定坑道中防护门上的化爆冲击波荷载及其防护技术提供依据。
In order to design efficient protective doors in tunnels ,pressure histories inside the tunnel should be determined primarily. Based on Hopkinson scaling law,attenuation of shock wave peak pressure in long tunnels from conventional explosions outside the tunnel entrance is simulated with the dynamic finite element software of LS-Dyna. Simulated result is compared with other experimental results ,and can be used as the basis to determine the chemical shock loads on the protective doors and the protective methods.
出处
《爆破器材》
CAS
2005年第5期4-7,共4页
Explosive Materials
关键词
坑道
冲击波
衰减
动力有限元
tunnel, shock wave, attenuation
dynamic finite element
