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为研究大半径装药在土中爆炸后的扩腔过程、压力变化、能量利用情况,应用ANSYS/LS-DYNA软件模拟了大半径耦合、不耦合装药两种情况下的土中爆炸扩腔过程。利用其后处理软件分析了固定单元的位移、速度、能量及爆轰过程的压力变化等,分析了耦合、不耦合装药两种情况下的爆扩效果,并与理论计算进行对比。模拟结果与理论计算基本吻合,证明所建立的模型、采用的算法合理,同时得出对于破碎性爆破应采用耦合装药方式,对于光面爆破等成型控制爆破应采用不耦合装药方式的结论,该模型和结论可应用于工程爆破优化设计。
In order to study the expansion process, pressure change and energy utilization after the large radius charge in the soil, ANSYS / LS-DYNA software was used to simulate the explosion in the soil under large radius coupling and uncoupled charge process. The post-processing software was used to analyze the displacement, velocity, energy of the fixed unit and the pressure changes during the detonation process. Explosion expansion effects under both coupling and uncoupled charges were analyzed and compared with theoretical calculations. The simulation results are in good agreement with the theoretical calculation. It is proved that the model is established and the algorithm adopted is reasonable. At the same time, it is concluded that the coupling method should be adopted for the crushing blasting and the uncoupling charging method should be adopted for the control blasting. , The model and conclusion can be applied to engineering blasting optimization design.