坑道内爆炸冲击波相似律问题探讨
发布时间：2019-07-11 12:55
【摘要】：为研究坑道内爆炸冲击波相似律问题,进行了不同药量坑道堵口爆炸实验,并利用ANSYS/LSDYNA软件对原型坑道与模型坑道爆炸冲击波进行数值计算。结果表明:与自由大气中不同,同一坑道内不同药量爆炸产生的冲击波不符合爆炸相似律;若原型坑道与模型坑道几何相似,装药量之比为几何相似比的三次方,则原型坑道与模型坑道内爆炸冲击波符合爆炸相似律;坑道内爆炸冲击波数值模拟时,若原型坑道与模型坑道网格尺寸符合相应的几何相似比,则冲击波计算结果满足相似律,当坑道截面网格密度为1675~2977时可以达到计算精度要求。
[Abstract]:In order to study the similarity law of explosion shock wave in tunnel, the explosion experiments of tunnel blockage with different amount of charge were carried out, and the shock wave of prototype tunnel and model tunnel was calculated by ANSYS/LSDYNA software. The results show that, different from the free atmosphere, the shock waves produced by the explosion in the same tunnel do not conform to the explosion similarity law, and if the geometry of the prototype tunnel is similar to that of the model tunnel, and the ratio of charge to charge is the cubic power of the geometric similarity ratio, the explosion shock wave in the prototype tunnel and the model tunnel conforms to the explosion similarity law. In the numerical simulation of explosion shock wave in tunnel, if the grid size of prototype tunnel and model tunnel accords with the corresponding geometric similarity ratio, the calculation results of shock wave meet the similarity law, and the calculation accuracy can be met when the grid density of tunnel section is 1675 鈮，
本文编号：2513174
[Abstract]:In order to study the similarity law of explosion shock wave in tunnel, the explosion experiments of tunnel blockage with different amount of charge were carried out, and the shock wave of prototype tunnel and model tunnel was calculated by ANSYS/LSDYNA software. The results show that, different from the free atmosphere, the shock waves produced by the explosion in the same tunnel do not conform to the explosion similarity law, and if the geometry of the prototype tunnel is similar to that of the model tunnel, and the ratio of charge to charge is the cubic power of the geometric similarity ratio, the explosion shock wave in the prototype tunnel and the model tunnel conforms to the explosion similarity law. In the numerical simulation of explosion shock wave in tunnel, if the grid size of prototype tunnel and model tunnel accords with the corresponding geometric similarity ratio, the calculation results of shock wave meet the similarity law, and the calculation accuracy can be met when the grid density of tunnel section is 1675 鈮，
本文编号：2513174
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