数值模拟研究分叉巷道中冲击波传播规律  

Numerical Simulation Research on Shockwave Propagation Characteristics Inside Branch Tunnel

作　　者：覃彬[1] 张奇[1] 向聪[1] 王登贵[1] 李伟[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《含能材料》2008年第6期741-744,757,共5页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金资助课题(10772029);国家博士点基金资助课题(20050007029)

摘　　要：为了研究几何分叉结构对冲击波传播特性的影响,利用LS-DYNA三维数值模拟计算程序,对同一弱冲击波通过不同角度的两向分叉巷道时传播、衰减的情况行了数值模拟,并提出了超压/冲量(比)准则来衡量"平面波"。研究结果表明:超压(比)准则适用于描述分布的不均性,而冲量(比)准则能更好地衡量分叉巷道中冲击波的破坏作用;分叉角度的影响较大,随着分叉偏转角的增大,主巷道内冲量将增大而分巷道内冲量将减小,恢复"平面波"的距离也增大,但不超过6倍巷道等效直径。In order to find out how the branch structure affected the characteristic of shockwave propagation, LS-DYNA software was used to compute, and simulate certain shockwave propagating through the branch tunnels with different angle, and the overpressure/momentum （ratio） bench mark to measure ＂plane wave＂ was proposed. The results show that overpressure （ratio） bench mark is well suited for describing anomaly distribution, and momentum （ratio） bench mark can provide better measure for shockwavc damage. Along with increasing of the branch deflexion angle, the primary tunnel momentum increases and the branch tunnel momentum decreases, and plane shockwave recover distance also increase but will not exceed six times equivalent diameter.

关 键 词：爆炸力学 分叉巷道 平面冲击波 数值模拟 

分 类 号：TQ560.1[化学工程—炸药化工]