约束条件对异形传爆药柱起爆能力影响的数值模拟  

Numerical Simulation of the Influence of Constraints on Initiating Capacity of the Special-Shaped Booster Pellet

作　　者：薛仲卿[1] 胡双启[1] 曹雄[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051

出　　处：《中北大学学报（自然科学版）》2015年第6期677-681,695,共6页Journal of North University of China(Natural Science Edition)

摘　　要：基于Lee-Tarver点火增长模型,运用LS-DYNA软件结合ALE算法对不同约束条件下异形传爆药柱起爆主装药的过程进行了数值模拟.得到了无外壳、Steel 4340外壳和Tung Alloy外壳约束条件下,整个装置冲击起爆过程的模拟云图以及该异形传爆药在测点A和B处的压力数据.结果表明：在该异形装药结构、密度及尺寸不变的条件下,随着约束材料阻抗的增加,异形传爆药柱起爆能力增大.约束外壳厚度在2mm范围内,随着厚度增大压力迅速增大;当壳厚度超过2.5mm后,压力趋于平稳,压力没有显著变化.此装药尺寸下,为进一步提高起爆能力,可选择阻抗高,厚度为2~2.5mm的约束外壳较为适宜.Based on ignition-growth model of Lee-Tarver,the initiation process of the main explosive detonated by the special-shaped booster pellet with different constraints was numerically simulated by LSDYNA software with ALE method.The simulated images of initiation process of the whole device and the pressure data at the points of A and B measured in this special-shaped booster pellet were obtained under the constraints of non-shell,Stell4340 and Tung Alloy.The results show that the initiation capacity of special-shaped booster pellet is improved with the increase of the impedances of the constraint materials under the fixed special-shaped structure,density and size of the booster pellet.When the thickness of constraint shell is below 2 mm,the pressure rises rapidly with the increase of the thickness.When the thickness is above 2.5mm,the pressure hasn’t changed obviously and then tends to be stable.In order to improve initiation capacity,it is available to select the constraint shell with high impedance and the thickness ranging from 2to 2.5mm.

关 键 词：约束条件 传爆药柱 异形结构 起爆能力 数值模拟 

分 类 号：TQ560[化学工程—炸药化工]