装药形状对地冲击荷载影响的数值模拟研究  

Numerical Study of the Effect of Charge Shape on Ground Shock Load

作　　者：洪智捷 HONG Zhijie(State Key Laboratory of Disaster Prevention&Mitigation of Explosion&Impact,Army Engineering University of PLA,Nanjing 210007)

机构地区：[1]陆军工程大学爆炸冲击防灾减灾国家重点实验室,南京210007

出　　处：《舰船电子工程》2023年第12期124-127,222,共5页Ship Electronic Engineering

摘　　要：随着新型钻地武器的发展,研究大长径比柱形装药爆炸产生的土中地冲击荷载对地下防护结构设计具有重要意义。首先建立球形装药在砂土中完全封闭爆炸的数值模型,通过与TM5-855-1手册中的公式进行对比,验证了数值计算方法的可靠性。随后建立6种不同长径比的柱形装药在砂土中封闭爆炸的数值模型,数值计算结果表明,装药形状对爆炸近区地冲击荷载影响较大,但一定比例爆距之外可忽略其影响。在球形装药爆炸产生的地冲击荷载基础上,引入装药形状系数,通过对数值模拟结果的拟合,得到了装药轴向和径向地冲击荷载的装药形状系数计算公式。With the development of new ground penetrating weapons,it is of great significance to study the ground shock load in sand caused by the explosion of cylindrical charge with large aspect ratio for the design of underground protective structure.In this paper,a numerical model of spherical charge which is completely closed in sand is established.By comparing with the formula in TM5-855-1 manual,the accuracy of the numerical calculation method is verified.Subsequently,6 numerical models of cylindri⁃cal charge with different length-to-diameter ratios closed explosion in sand are established.Numerical results show that the charge shape has a great influence on the ground shock load near the explosion,while the influence can be ignored beyond a certain scaled distance.Based on the ground shock load generated by spherical charge explosion,the charge shape coefficient is introduced.By fit⁃ting the numerical simulation results,the calculation formula of charge shape coefficient of axial and radial ground shock load is ob⁃tained.

关 键 词：装药形状 砂土 地冲击 数值模拟 

分 类 号：TJ410.3[兵器科学与技术—火炮、自动武器与弹药工程]