空气和水介质中EFP形成特性的数值仿真研究  

Study on Characteristics of EFP Formation in Air and Water Medium by Numerical Simulation

作　　者：姜鑫圣 王金相[1] 李恒 唐奎[1] 林尚剑 JIANG Xinsheng;WANG Jinxaing;LI Heng;TANG Kui;LIN Shangjian(National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China;Naval Research Academy, Beijing 102401, China)

机构地区：[1]南京理工大学瞬态物理国家重点实验室,南京210094 [2]海军研究院,北京102401

出　　处：《兵器装备工程学报》2020年第6期1-6,共6页Journal of Ordnance Equipment Engineering

基　　金：国家自然科学基金项目(11672138);预研创新项目(3020605020205)。

摘　　要：为掌握水介质中EFP成型的参数设计方法,开展了4种EFP(向后翻转型、向前压合型、压垮型和长杆型)在空气和水介质中形成特征的对比数值仿真研究,确定了上述4种EFP在水介质中成型的参数要求,分析了水介质中EFP成型参数的变化规律。结果表明:相同装药条件下,水介质中药型罩获得的能量比空气中大,药型罩沿母线罩微元压垮速度梯度更大,从而形成长径比更大的EFP结构;与空气中相比,向后翻转型EFP、长杆型EFP、向前压合型EFP及压垮型EFP在水中良好成型所需药型罩壁厚分别增大26.7%、20.0%、10.0%、66.7%,可调整药型罩曲率半径得到与空气中形成特征类似的EFP结构;以向前压合型EFP为例,水介质环境下,随着药型罩壁厚的增大,EFP速度和长径比减小,而随着药型罩曲率半径的增大,EFP速度将增大而长径比减小,在一定范围内,随着空气罩长度的增大,EFP在爆炸成型后的平均速度较小,但EFP长径比将会增大。In order to explore the difference between EFP formation in air and water,and achieve a good design configuration of EFP formation in water,four kinds of EFP(Backward-Folding EFP,Forward-Folding EFP,Radial Collapse EFP and Long Rod EFP)were carried out to discuss the characteristics of EFP formation in air and water by numerical simulation.The parameters of the four EFPs formation in water were determined,and the parameters’effects on EFP formation were analyzed.The results in the water show that under the same charge condition,the energy obtained by the liner is larger,and the velocity difference of the liner along the busbar liner is larger,to get a EFP structure with larger length-diameter ratio in water than in air.Compared with that in the air,the thickness of the liner with Backward-Folding EFP,long rod EFP,Forward-Folding EFP and Radial Collapse EFP has an increase by 26.7%,20.0%,10.0%and 66.7%respectively.We can attain a similar EFP structure in air by adjusting the curvature radius of liner.Taking Forward-Folding EFP as an example,by the thickness of liner increasing,the EFP velocity and length-diameter ratio decrease,the curvature radius of liner increases too.If velocity increases,the length-diameter ratio will decrease.In a certain range,with the longer the length of air liner,EFP velocity has a slight change after explosion,but the EFP length-diameter ratio becomes larger.

关 键 词：爆炸成型弹丸(EFP) 水介质 弹丸结构 参数设计 数值仿真 

分 类 号：TJ410.33[兵器科学与技术—火炮、自动武器与弹药工程]