【作者】 张秀华； 王钧； 赵金友； 吴燕燕；

【Author】 ZHANG Xiuhua, WU Yanyan,WANG Jun, ZHAO Jinyou (School of Civil Engineering, Northeast Forestry University, Harbin 150040, China)

【机构】 东北林业大学土木工程学院；

【摘要】 利用ANSYS/LS-DYNA动力分析软件,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,共选取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。更多还原

【Abstract】 Using ANSYS/LS-DYNA dynamic analysis software based on the fluid-structure coupling method to analyze gas explosion shock wave characteristics and Actions on structures internal gas explosion. Using ANSYS to build finite element modeling, mixture gas and air using Euler grid. The multi-material Eulerian and Lagrangian coupling algorithm is adopt. Analyzing flammable gas and air volume ratio, volume and explosion pressure release part influence of the explosion shock wave, selecting nine kinds of working condition numerical analysis. The analysis results show that: when flammable gas and air volume ratio is 9.5%, producing blast shock wave pressure is the largest. The analysis results show that fluid-structure coupling method can well simulated shock wave propagation of internal gas explosion, and the pressure peak of blast shock wave increased with the increasing of the blast air initial energy. To a certain extent, reasonable setting pressure relief openings can reduce the damaging effects of structure.更多还原