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工程力学  2014 

室内燃气爆炸冲击波的特性及传播规律

, PP. 258-264

Keywords: 燃气爆炸,爆炸冲击波,传播规律,流固耦合,数值分析

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Abstract:

利用显示动力分析软件ANSYS/LS-DYNA,基于流固耦合方法分析可燃气体在室内爆炸冲击波的特性及对结构的作用。利用ANSYS建立有限元建模,燃气混合气体及空气采用欧拉网格,采用多物质ALE算法。分析可燃气体与空气的体积比、体积及爆炸泄压部位等改变时对爆炸冲击波的影响,选取9种工况进行数值分析。分析结果表明:当可燃气体与空气的体积比为9.5%时,产生爆炸冲击波压力最大。利用流固耦合的方法能很好地模拟爆炸冲击波的传播规律及对结构作用的过程。燃气在封闭空间里爆炸时,合理设置泄压口,能一定程度地减小爆炸冲击波对结构的破坏作用。

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