CAJ | 학술논문

采用LS-DYNA对在药型罩上粘附隔板结构形成带尾翼型爆炸成型弹丸(explosively formed projectile,EFP)进行三维数值模拟,从药型罩微元压跨速度和压力的角度初步探讨了形成尾翼型EFP的机理,对同一直径的大锥角型、球缺型和弧锥结合型药型罩形成的尾翼型EFP进行了对比分析,三种结构药型罩均能形成较为明显的尾翼,其中大锥角型药型罩得到的EFP速度最高.数值计算结果表明,EFP尾翼数与药型罩上所粘贴的隔板数一致,三种不同结构药型罩上粘贴四个隔板,得到的尾翼数均为四个.通过实验,对贴隔板法形成尾翼EFP做了进一步验证,实验结果与数值模拟结果基本一致.
채용LS-DYNA대재약형조상점부격판결구형성대미익형폭작성형탄환(explosively formed projectile,EFP)진행삼유수치모의,종약형조미원압과속도화압력적각도초보탐토료형성미익형EFP적궤리,대동일직경적대추각형、구결형화호추결합형약형조형성적미익형EFP진행료대비분석,삼충결구약형조균능형성교위명현적미익,기중대추각형약형조득도적EFP속도최고.수치계산결과표명,EFP미익수여약형조상소점첩적격판수일치,삼충불동결구약형조상점첩사개격판,득도적미익수균위사개.통과실험,대첩격판법형성미익EFP주료진일보험증,실험결과여수치모의결과기본일치.
The explosively formed projectile(EFP) with fins for a cover charge structure by LS-DYNA software which four covers were conglutinated on the liner was studied by three-dimensional numerical simulation. The mechanism of forming EFP with fins was discussed based on the curves of velocity and pressure vs time of the liners. A contrastive analysis was carried out on the three kinds of liners which include big-cone shaped liner,imperfect-sphere shaped liner and arc-cone shaped liner. Results show that three kinds of liners can form obvious fins and the velocity of the big-cone shaped liner is the fastest. The experimental results agree with the simulational results basically.