CAJ | 학술논문

分别采用有限元法( FEM)和有限元同光滑粒子耦合( FE/SPH)算法对球形弹丸侵彻复合靶板过程进行数值研究。采用14.5 mm滑膛枪发射直径6 mm的钢质球形弹丸侵彻不同组合的钢/铝爆炸复合靶,通过弹道实验对数值算法的有效性进行验证。讨论了2种数值算法描述实验现象和结果的适用性,分析了靶板的破坏模式、层数、面密度和组合方式对靶板弹道性能的影响。结果表明：FEM算法较FE/SPH耦合算法能更直观地再现靶板层间结合界面的拉伸破坏形貌,且对实验结果的定量描述比FE/SPH耦合算法更接近实验结果,Tie-Break模型能够有效地反映靶板层间结合强度的影响；在球形弹丸的侵彻作用下,面板和夹板发生剪切冲塞破坏,铝背板发生延性扩孔破坏,钢背板发生瓣状破坏；在面密度相同的情况下,钢/铝/钢3层靶板具有最佳的抗侵彻性能。
분별채용유한원법( FEM)화유한원동광활입자우합( FE/SPH)산법대구형탄환침철복합파판과정진행수치연구。채용14.5 mm활당창발사직경6 mm적강질구형탄환침철불동조합적강/려폭작복합파,통과탄도실험대수치산법적유효성진행험증。토론료2충수치산법묘술실험현상화결과적괄용성,분석료파판적파배모식、층수、면밀도화조합방식대파판탄도성능적영향。결과표명：FEM산법교FE/SPH우합산법능경직관지재현파판층간결합계면적랍신파배형모,차대실험결과적정량묘술비FE/SPH우합산법경접근실험결과,Tie-Break모형능구유효지반영파판층간결합강도적영향；재구형탄환적침철작용하,면판화협판발생전절충새파배,려배판발생연성확공파배,강배판발생판상파배；재면밀도상동적정황하,강/려/강3층파판구유최가적항침철성능。
The finite element method ( FEM ) and the coupling algorithm of finite element and smoothed particle hydrodynamics ( FE/SPH ) method are applied to simulate the penetration process of spherical projectile into layered plates,and the ballistic experiment is carried out to verify the ef-fectiveness of numerical simulation. In experiment,a 14. 5 mm slip chamber gun is used to launch the spherical steel projectile with 6 mm diameter to penetrate the various steel-aluminum explosive welding plates vertically. The feasibility of the numerical simulations in describing the results of experiment is discussed,and the effects of layer numbers,areal densities and layer combinations on the ballistic performance and the damage model are analyzed. The results show that,compared with the FE/SPH coupling algorithm,the FEM can not only reappear the tensile fracture morphology of layers more clearly,but have the better accordance with experiment for quantitative analysis. The Tie-Break model can reflect the influence of interface bonding strength well. The damage model of the front plate and the middle plate is shearing and plugging,the steel rear plate is petalling deformation and the aluminum rear plate is ductile deformation impacted by spherical projectiles vertically. The anti-penetration performance of steel-aluminum-steel three-layer plates is the best when the areal density is the same.