冷却塔定向爆破拆除及爆破效果有限元数值模拟

摘要

介绍了3000m2冷却塔的爆破拆除实例,采用动力有限元分析软件ANSYS/LS-DYNA建立了冷却塔爆破拆除三维有限元模型,对爆破倒塌效果进行了模拟.模拟结果与真实情形在倾倒过程与倒塌效果方面有很大相似性.冷却塔结构上窄下宽,重心较低,失稳后重心不容易移出,但由于本身体积和重量都比较大,而塔壁较薄,爆破缺口形成后发生塑性变形而失稳倒塌.%The explosive demolition project of a 3 000 m2 hyperbolic cooling tower was introduced and the collapse of the cooling tower was simulated with a 3D finite element model built with ANSYS/LS-DYNA software. The simulation result accords with the practice results in the course of blasting. The cooling tower was narrow at top but broad at bottom so as to the center of gravity is not easy to move out, it collapse caused by plasticity distortion due to its large volume and weight but with thin wall.