摘要
由于密度、压力等物理量存在差异,爆炸成型弹丸(EFP)在空气和水中的成型过程差别较大。为了优化水下EFP的设计方案,利用AUTODYN有限元软件开展仿真研究,详细讨论了装药、药型罩及弹前空气域3部分共7个变量对EFP水下成型过程的影响,最终得出适合水下EFP装药的设计参数。根据仿真结果,总质量为1 kg的EFP装药优化后的设计参数:炸药长径比为1.5,炸药种类选择爆速较高的HMX,药型罩材料为紫铜,切向锥角α为145°,壁厚δ为2 mm,弹前空气域长度为3倍装药半径,起爆半径r为0.4倍装药半径。该方案对优化EFP速度、长径比及动能等有较好的效果。
Due to the difference in physical quantities such as density and pressure,the forming process of explosive formed projectile(EFP)in air and water is quite different.In order to optimize the design scheme of underwater EFP,the simulation study was carried out using AUTODYN finite element software and the specific effects of the seven variables of the charge were discussed in detail.A set of design parameters suitable for underwater EFP charge is produced.According to the simulation results,the optimized design parameters of the EFP charge with a total mass of 1 kg are:the aspect ratio of the explosive is 1.5,the type of explosive is HMX with a higher detonation speed,the material of the liner structure is copper,and the tangential cone angle is 145°,the wall thicknessδis 2 mm,the length of the air field is 3 times the charge radius,and the initiation radius r is 0.4 times the charge radius.This scheme has a good effect on optimizing EFP speed,aspect ratio and kinetic energy.
作者
孙远翔
胡皓亮
张之凡
SUN Yuanxiang;HU Haoliang;ZHANG Zhifan(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;School of Naval Architecture&Ocean Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)
出处
《高压物理学报》
EI
CAS
CSCD
北大核心
2020年第6期123-133,共11页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金青年科学基金(11802025)
爆炸科学与技术国家重点实验室自主研究课题(YBKT17-08)。
关键词
爆炸成型弹丸
水下爆炸
数值模拟
优化设计
explosive formed projectiles
underwater explosion
numerical simulation
optimized design
