张秀华, 王钧, 赵金友, 吴燕燕. 室内燃气爆炸冲击波的特性及传播规律[J]. 工程力学, 2014, 31(增刊): 258-264. DOI: 10.6052/j.issn.1000-4750.2013.04.S050
引用本文: 张秀华, 王钧, 赵金友, 吴燕燕. 室内燃气爆炸冲击波的特性及传播规律[J]. 工程力学, 2014, 31(增刊): 258-264. DOI: 10.6052/j.issn.1000-4750.2013.04.S050
ZHANG Xiu-hua, WANG Jun, ZHAO Jin-you, WU Yan-yan. BLAST SHOCK WAVE CHARACTERISTICS AND PROPAGATION LAW OF INTERNAL GAS EXPLOSION[J]. Engineering Mechanics, 2014, 31(增刊): 258-264. DOI: 10.6052/j.issn.1000-4750.2013.04.S050
Citation: ZHANG Xiu-hua, WANG Jun, ZHAO Jin-you, WU Yan-yan. BLAST SHOCK WAVE CHARACTERISTICS AND PROPAGATION LAW OF INTERNAL GAS EXPLOSION[J]. Engineering Mechanics, 2014, 31(增刊): 258-264. DOI: 10.6052/j.issn.1000-4750.2013.04.S050

室内燃气爆炸冲击波的特性及传播规律

BLAST SHOCK WAVE CHARACTERISTICS AND PROPAGATION LAW OF INTERNAL GAS EXPLOSION

  • 摘要: 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。

     

    Abstract: Based on the fluid-structure coupling method, the gas explosion shock wave characteristics and actions on the structures subjected to internal gas explosion are analyzed, using ANSYS/LS-DYNA dynamic analysis software. Finite element models are established using ANSYS. The Euler grids and multiple material ALE algorithms are adopted for flammable mixture gas and air. The influencing factors of the explosion shock wave the volume ratios of flammable gas to air, the volume and explosion pressure-release parts are analyzed. Nine kinds of working conditions for numerical analysis are selected. The analysis results show that the explosion shock wave pressure is the maximum when the volume ratio of flammable gas to air reaches 9.5%. The explosion shock wave propagation law and structural effect process under an internal gas explosion can well be simulated by the fluid-structure coupling method. The destructive effect of a structure can be reduced with setting up reasonable relief pressure openings when a flammable gas explosion happen in a closed space.

     

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