| 爆破拆除筒仓构筑物的倒塌过程动态仿真 |
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| 作者单位： | ;1.北京理工大学爆炸科学与技术国家重点实验室;2.北京理工大学爆炸科学与技术国家重点实验室;3.北京理工北阳爆破工程技术有限责任公司 北京100081;4.北京100081 |
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| 摘 要： | 在爆破拆除工程中,有一种筒仓构筑物由于其结构特殊,高宽比接近1,定向倒塌爆拆难度较大,且解体不充分,成为目前爆破拆除的难点。本文利用动力有限元程序LS-DYNA,对爆破拆除筒仓构筑物的倒塌过程,进行了力学仿真,并通过几何分析确定筒仓最小破坏高度的计算公式,以此选取不同破坏高度进行了讨论。仿真计算的结果与真实倒塌过程非常接近,说明通过适当的选取计算参数和计算模型,可以对这种复杂破坏过程进行模拟分析和仿真。
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| 关 键 词： | 爆破拆除 筒仓构筑物 动力有限元 定向倒塌 仿真 |
DYNAMIC SIMULATION FOR COLLAPSE OF SILO STRUCTURE USING BLASTING DEMOLITION |
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| Abstract: | A silo with relatively small ratio of height to width and special frames became the difficulty in the project of demolish blasting.It was very difficult to dismantle and disaggregate sufficiently with directional blasting.Simulation of the collapse of silo structure was processed in this paper with the dynamic finite element software of LS-DYNA.The calculating formula of the minimum destroying height of silo structure was verified by using geometry analysis,and different destroying heights used in the simulation were discussed.The simulation was very close to the real conditions,meaning that using proper numerical model could simulate and analyze such complicated demolition process. |
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| Keywords: | Blasting demolition Silo structure Dynamic finite element Directional collapse Simulation |
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