渐进式大直径空孔螺旋掏槽成腔过程数值模拟

摘要

The process of cavity formalion by progressive large diameter empty hole spiral cut blasting is simulated by ANSYS/LS-DYNA. The intuitional graphics of the change of cavity in the explosive volume expansion process was obtained. Numerical results show that the blasting wave delivers in the form of cylinder wave, and the empty hole plays as a free surface. Meanwhile, the theory rationality of cavity formation by progressive large diameter empty hole spiral cut blasting is verified. The cavity formation process by cut blasting can be visualized in the numerical simulation study. It is expected that the result of the study can forecast the cut blasting result and optimize the design of blasting technical parameters as positive.%借助ANSYS/LS - DYNA三维非线性动力有限元软件,对渐进式大直径空孔螺旋掏槽爆破成腔过程进行了数值模拟研究,得到了炸药爆炸体积扩展过程中腔体形态变化的直观图形.结果表明:爆破应力波以柱面波的形式传递,而且空孔能较好地起到自由面的作用,同时还验证了渐进式大直径空孔螺旋掏槽成腔理论的合理性.整个数值模拟研究实现了掏槽爆破成腔成型过程的可视化,对预测掏槽爆破效果和优化爆破技术参数具有积极意义.