CAJ | 학술논문

采用 LS-DYNA 建立三组多点起爆爆炸成型弹丸（EFP）装药数值模型进行计算，系统研究了起爆点数量（ N）、起爆环直径（D I ）、装药长径比（LC /D C ）等结构参数对尾翼 EFP 成型性能的影响规律。研究结果表明：起爆点数量、起爆环直径、装药长径比对尾翼 EFP 的速度、长径比和翼径比等基本性能均有显著影响；起爆点的数量 N 与所形成尾翼的数量相同，N ＝4时翼径比最大，增加起爆环直径和装药长径比是提高 EFP 速度和长径比最为有效和直接的途径。对不同曲率半径的等壁厚和变壁厚球缺罩对比分析，结果表明采用变壁厚球缺罩更有利于获得形态良好的尾翼 EFP，并且 N 取4、D I 取40 mm、L C /D C 取0．8为宜。
채용 LS-DYNA 건립삼조다점기폭폭작성형탄환（EFP）장약수치모형진행계산，계통연구료기폭점수량（ N）、기폭배직경（D I ）、장약장경비（LC /D C ）등결구삼수대미익 EFP 성형성능적영향규률。연구결과표명：기폭점수량、기폭배직경、장약장경비대미익 EFP 적속도、장경비화익경비등기본성능균유현저영향；기폭점적수량 N 여소형성미익적수량상동，N ＝4시익경비최대，증가기폭배직경화장약장경비시제고 EFP 속도화장경비최위유효화직접적도경。대불동곡솔반경적등벽후화변벽후구결조대비분석，결과표명채용변벽후구결조경유리우획득형태량호적미익 EFP，병차 N 취4、D I 취40 mm、L C /D C 취0．8위의。
Multi-point initiation explosively formed projectile(EFP)charges with different N( the number of initiation points),DI ( the diameter of annular initiation),LC/DC(the length /diameter of charge)were studied by LS-DYNA program. program The in-fluences of multi-point initiation charge configuration parameters,such as N,DI ,LC/DC ,on the formation parameters of EFP with fins were studied. The results of numerical simulation indicate that there are remarkable effects of N,DI and LC/DC on the forma-tion parameters,including v,LE /DE(the length /diameter),WS/DE(the wingspan /diameter)of EFP with fins. The number of fins is equal to the number of initiation points. When the N is 4,the WS/DE of EFP with fins approaches the maximum. Increasing DI and LC /DC effectively enhances the v and LE /DE of EFP with fins. The formation parameters of EFPs formed by hemispherical liner with uniform or variational wall-thickness were compared. Results indicate that hemispherical liner with variational wall-thickness is a more feasible option. When N =4,DI =40 mm,and LC/DC =0. 8 respectively,EFP with more appropriate configuration can be approached.