Numerical Simulation of Directional Collapse Effect under Different Blasting Gap of Chimney
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摘要:为研究不同爆破缺口下烟囱的定向倒塌，以实际需拆除的烟囱作为研究对象，应用ANSYS/LS-DYNA软件分别建立烟囱在不同高度和不同形状爆破缺口下的定向倒塌模型。研究结果表明：相比爆破缺口高度0.50m及1.94m，爆破缺口高度为1.05m的倒塌效果较好，倒塌用时较少；相比倒梯形、矩形缺口形状，正梯形缺口倒塌效果最优。最终采用缺口高度为1.05m的正梯形爆破缺口进行实际爆破，实际爆破效果较好，并且仿真和试验振动数据最大偏差不超过9.5%，说明了仿真的可靠性。
Abstract:To study the method of directional chimney collapse under different blasting gaps, aimed at the chimney to be removed, by use of ANSYS/LY-DYNA software, the directed collapse models of the chimney under different heights and different shapes of blasting gap were established. The study results show that compared with the height of the blasting gap of 0.50m and 1.94m, the collapse effect of the height of 1.05m is better, and it takes less time. Compared with the gap shape of inverted trapezoidal and rectangular, the collapse effect of positive trapezoidal is the best. Finally, the positive ladder blasting gap with a gap height of 1.05m was used, the actual blasting effect is good. And the peak diviation of the simulation and test vibration data is less than 9.5%, indicating the reliability of the simulation.
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