摘要
爆炸激波管中阻塞对靶标最显著的影响表现在轴向净荷载上。本文采用数值计算的方法就激波管中阻塞对靶标的轴向净荷载的影响作出定量分析。对强度为0．03MPa、0．05MPa、0．07MPa、0．10MPa、0．15MPa及0．20MPa的阶跃激波和衰减激波在阻塞比为0．02、0．1、0．2及0．3时的情况分别进行了数值计算。研究结果表明：就本文所讨论的激波强度及阻塞比范围而言，在衍射阶段，轴向净载荷所受影响不大；靶标上动压随阻塞增加的重要性取决于入射波相对于靶标长度的衰减率以及衍射荷载与拖曳荷载的相对大小。研究结论为某大型爆炸激波管尺寸的确定提供参考。
The most significant effect of blockage on loading. Numerical computations were carried out to a target in a blast shock tube is the change in the net axial quantify the effect of blockage on the net axial loading of a target. Step and decaying shocks with overpressures of 0. 03 MPa, 0. 05 MPa, 0. 07 MPa,0. 10 MPa, 0. 15 MPa and 0. 20 MPa were respectively computed for blockage ratios of 0. 02, 0. 1,0. 2 and 0. 3. The results show that the net axial loading is not affected significantly during the diffraction phase for the range of overpressures and blockages considered in this paper, and the importance of the increase in dynamic pressure with blockage depends on the rate of decay of the incident wave relative to the length of the target and the relative magnitudes of diffraction and the drag loading. The analyses are helpful to similar design and safe use of the blast chamber. The study conclusions are helpful to determine the size of a blast shock tube.
出处
《防护工程》
2012年第4期18-23,共6页
Protective Engineering
关键词
爆炸激波管
阻塞效应
数值计算
blast shock tube
blockage effect
numerical computation
