后勤工程学院学报
後勤工程學院學報
후근공정학원학보
JOURNAL OF LOGISTICAL ENGINEERING UNIVERSITY
2014年
2期
13-17,45
,共6页
罗伟铭%石少卿%田镇华%尹平
囉偉銘%石少卿%田鎮華%尹平
라위명%석소경%전진화%윤평
FEM/SPH算法%侵彻%土体%数值模拟
FEM/SPH算法%侵徹%土體%數值模擬
FEM/SPH산법%침철%토체%수치모의
FEM/SPH algorithm%penetration%soil%numerical simulation
基于有限元法(FEM)和光滑粒子流体动力学(SPH)结合的算法,用数值模拟了钢质弹丸对钢筒约束土体的侵彻过程。基于ANSYS/LS-DYNA显式动力分析和LS-PrePost后处理软件,形象再现了钢质弹丸冲击作用下土体飞溅形成漏斗坑和直线通道的物理过程。侵彻深度计算结果与实验数据吻合较好,钢质弹丸的速度和加速度时程曲线图与理论分析一致,体现了FEM/SPH算法的精确性。研究结果表明FEM/SPH算法在模拟侵彻土体方面具有可行性和有效性。
基于有限元法(FEM)和光滑粒子流體動力學(SPH)結閤的算法,用數值模擬瞭鋼質彈汍對鋼筒約束土體的侵徹過程。基于ANSYS/LS-DYNA顯式動力分析和LS-PrePost後處理軟件,形象再現瞭鋼質彈汍遲擊作用下土體飛濺形成漏鬥坑和直線通道的物理過程。侵徹深度計算結果與實驗數據吻閤較好,鋼質彈汍的速度和加速度時程麯線圖與理論分析一緻,體現瞭FEM/SPH算法的精確性。研究結果錶明FEM/SPH算法在模擬侵徹土體方麵具有可行性和有效性。
기우유한원법(FEM)화광활입자류체동역학(SPH)결합적산법,용수치모의료강질탄환대강통약속토체적침철과정。기우ANSYS/LS-DYNA현식동력분석화LS-PrePost후처리연건,형상재현료강질탄환충격작용하토체비천형성루두갱화직선통도적물리과정。침철심도계산결과여실험수거문합교호,강질탄환적속도화가속도시정곡선도여이론분석일치,체현료FEM/SPH산법적정학성。연구결과표명FEM/SPH산법재모의침철토체방면구유가행성화유효성。
Based on the combination of the finite element method(FEM)and the smooth particle hydrodynamics(SPH), nu-merical simulation of steel projectile penetration into soil constrained by steel cylinder is carried out. Based on the ANSYS/LS-DYNA explicit dynamic analysis software and the LS-PrePost post-processing software, the process of projectile impact splash, forming a funnel pit and linear channel is recreated visually. Penetration depth calculation results are consistent with experiment results and velocity-time history and acceleration-time history curve is in good agreement with theory, indicating the accuracy of the FEM/SPH algorithm. The results prove the validity and feasibility of the FEM/SPH algorithm in simulating penetration into soil.