长坑道中防护门上的化爆冲击波压力研究

为了对坑道中的防护门抗化爆冲击波进行有效的设计,先需确切知道作用在防护门上的反射压力。首先基于Hopkinson比例定律,用LS-DYNA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,长坑道中自由场冲击波峰值压力的衰减规律,并由此确定作用在防护门上的反射压力。计算结果与其他经验方法的预测结果进行了比较。可供防护门的设计及动力响应研究参考。

Study on the Pressure of Chemical Shock Waves upon the Protective Door in Long Tunnels

In order to an available design of protective doors in tunnels, the reflected pressure upon protective doors should be known 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. And reflected pressures upon protective doors is obtained by the relationship between incident and reflected waves. Simulated results is compared with other experimental methods. This can be used as a reference for studies on the dynamics response and security design of protective doors.