钨合金弹丸侵彻钢靶的数值模拟方法

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中图分类号：O383;TJ012.4 国标学科代码：13035 文献标志码：A

Numerical simulation method for tungsten alloy projectile penetration into steel target

WEI Guoxu， CUI Hao， ZHOU Hao， YANG Guitao，GUO Rui （SchoolofMechanicalEnineering，Nanjing UnvesityofienceandTechnologyNnjingo4，Jangsu，Cina）

Abstract： Inorder to improve thequantitative characterization of the penetration process of tungsten aloy projectileinto the target，thenumerical methodssuchasFEM （finite element method），SPG （smoothedparticleGalerkin），SPH （smoothed particle hydrodynamics），andFE-SPH （finite element-smothed particlehydrodynamics）adaptivesimulation methods were employed to simulate the penetration of tungsten alloy projectiles into Q235A steel trgets.Based on numericalsimulations，a comparisonwas made of the advantages and disadvantages of the four numerical simulation methods for calculating the residualvelocityoftheprojectileafterpenetratingthtarget，theperforationdiameterofthetarget，andtedistributionof secondary fragments by theprojectile penetration.Theresults showthat，forcalculating theresidualvelocityof theprojectile， FEMandFE-SPHadaptive methods strictlyrelyon the selectionoffailurecriteriaand corrsponding parameters，as FEM employs anelement erosionalgorithmtomodelmaterialfailure，while SPGmethod，as itdoesnotrequireadjusting thefailure parameters in bond failure mode，canotainrelativelyaccurate calculations; forpredicting perforation diameter，FEMandFESPHadaptive methodsaccuratelyrepresent material boundariesand perforationmorphology，although theperforationdiameter variessignificantlyunderdifferentfailurecriteria，whiletheSPGmethodcanaccuratelypredicttheperforationdiameterof target plates due toitsinsensitivetofailure parameters; foranalzing secondaryfragments generationand distribution，bothFE

SPHadaptiveand SPH methods effectivelycharacterize these phenomena，while the FE-SPH adaptive method provides detailed information on large fragments，it is less computationally efficient than the SPH method.

Keywords： finite element method （FEM）; smoothed particle Galerkin （SPG）; smoothed particle hydrodynamics （SPH）; secondary fragments; penetration

钨合金球形弹丸作为杀爆类战斗部的主要毁伤元，对装甲目标的毁伤能力主要体现在弹丸穿靶后的剩余速度、穿孔直径以及弹丸穿靶后产生的二次破片等方面。（剩余19728字）