摘要
通过长直坑道内炸药爆炸后冲击波的超压峰值变化研究坑道内爆炸冲击波的相似规律。使用AUTODYN软件建立长直坑道仿真模型,采用映射方法将3.25 kg当量的球形TNT炸药在空气中的爆炸状态映射到长直坑道中,采用经典试验结果对模型进行验证。根据几何相似原理,通过改变坑道尺寸、坑道截面形状、炸点位置和炸药当量建立多组不同的模型,模拟计算得到坑道内爆炸冲击波的超压峰值,分析超压峰值的相似规律。结果表明,保持坑道截面积不变、改变截面形状及保持爆心距与炸药当量的比值不变、改变炸药当量,各模型计算得到的冲击波超压峰值具有相似规律。采用本文方法可对其他满足几何相似原理的坑道内爆炸冲击波参数进行预测,为地下空间设施的安全设计提供参考。
The similarity law of explosion shock waves in long straight tunnels is studied through the variation of peak overpressure of shock waves after explosions.A simulation model of a long straight tunnel is established using AUTODYN software,and a mapping method is used to map the explosion state of a 3.25 kg equivalent spherical TNT explosive in the air to the long straight tunnel.The model is validated using classical experimental results.According to the principle of geometric similarity,multiple different models are established by changing the size of the tunnel,the cross-sectional shape of the tunnel,the position of the explosion point,and the explosive equivalent.The peak overpressure of the explosion shock wave in the tunnel is simulated and calculated,and the similarity law of the peak overpressure is analyzed.The results indicate that when keeping the cross-sectional area of the tunnel unchanged,changing the cross-sectional shape,and keeping the ratio of the blast center distance to the explosive equivalent unchanged,as well as changing the explosive equivalent,shock wave overpressure peaks calculated by any model are in similar patterns.The method described here can be used to predict the parameters of explosion shock waves in other tunnels with geometric similarity,providing reference for the safety design of underground space facilities.
作者
王新颖
秦毅
赵涯
綦鸿力
WANG Xinying;QIN Yi;ZHAO Ya;QI Hongli(Shenyang Ligong University,Shenyang 110159,China)
出处
《沈阳理工大学学报》
CAS
2025年第1期65-71,共7页
Journal of Shenyang Ligong University
基金
辽宁省教育厅高等学校基本科研项目(JYTMS20230206)。
关键词
长直坑道
冲击波
超压峰值
相似规律
long straight tunnel
shock wave
peak overpressure
similarity law
