振动与冲击
振動與遲擊
진동여충격
JOURNAL OF VIBRATION AND SHOCK
2014年
22期
46-50
,共5页
汪庆桃%吴克刚%李必红%陈志阳
汪慶桃%吳剋剛%李必紅%陳誌暘
왕경도%오극강%리필홍%진지양
超高速碰撞%SPH 方法%破碎临界速度%尺寸分布规律
超高速踫撞%SPH 方法%破碎臨界速度%呎吋分佈規律
초고속팽당%SPH 방법%파쇄림계속도%척촌분포규률
hypervelocity impact%SPH method%fragmentation-initiation threshold%size distribution law
讨论超高速碰撞数值模拟方法，用 ANSYS /AUTODYN 程序的 SPH 方法对球形弹丸超高速撞击时弹丸破碎、碎片云形成过程进行数值模拟并与实验结果比较，验证计算方法及模型参数的正确性。在此基础上研究钨合金、轧制均质装甲（Rolled Homogeneous Armor，RHA）两种材料球形弹丸破碎的临界速度随比值（ts /dp，ts为靶板厚，dp为弹丸直径）的变化规律，给出两种材料超高速碰撞时应变率及平均碎片尺寸随撞击速度的变化曲线以及碎片质量分布规律。
討論超高速踫撞數值模擬方法，用 ANSYS /AUTODYN 程序的 SPH 方法對毬形彈汍超高速撞擊時彈汍破碎、碎片雲形成過程進行數值模擬併與實驗結果比較，驗證計算方法及模型參數的正確性。在此基礎上研究鎢閤金、軋製均質裝甲（Rolled Homogeneous Armor，RHA）兩種材料毬形彈汍破碎的臨界速度隨比值（ts /dp，ts為靶闆厚，dp為彈汍直徑）的變化規律，給齣兩種材料超高速踫撞時應變率及平均碎片呎吋隨撞擊速度的變化麯線以及碎片質量分佈規律。
토론초고속팽당수치모의방법，용 ANSYS /AUTODYN 정서적 SPH 방법대구형탄환초고속당격시탄환파쇄、쇄편운형성과정진행수치모의병여실험결과비교，험증계산방법급모형삼수적정학성。재차기출상연구오합금、알제균질장갑（Rolled Homogeneous Armor，RHA）량충재료구형탄환파쇄적림계속도수비치（ts /dp，ts위파판후，dp위탄환직경）적변화규률，급출량충재료초고속팽당시응변솔급평균쇄편척촌수당격속도적변화곡선이급쇄편질량분포규률。
The numerical simulation method for the process of hypervelocity impact was discussed.The damage mechanism and the process of debris cloud forming were studied with the SPH method in ANSYS /AUTODYN code when spherical projectiles at hypervelocity impact a thin shield.The hypervelocity impact of projectiles made of tungsten alloy and RHA(Rolled Homogeneous Armor)material with the given constitutive models was numerically simulated and the results are in good agreement with the experimental results.The fragmentation-initiation threshold velocity of the projectile,the average fragment size and the distribution of fragment size,together with their variation with the change of impacting velocity were investigated.
