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含能破片对运动靶的侵爆行为

     

摘要

为研究含能破片对运动靶板的侵爆行为,运用AUTODYN‐3D软件对其以不同着角侵彻运动靶进行数值模拟。结合试验结果和文献验证了模型的有效性,计算了含能破片对运动靶的侵爆行为。结果表明,与侵彻静止靶相比,含能破片侵彻运动靶时,破片发生明显偏斜,且穿孔直径变化明显;破片剩余速度随靶板运动速度的增加而降低,随着角的增大而下降,降幅范围56.25%~77.5%;破片侵彻运动靶时含能材料内部应力峰值较静止靶变化幅度不大,几乎为直线,着角不同,含能材料应力峰值差异显著,最大峰值差异达5.2 G Pa。非零着角下,靠近着靶点处的含能材料不易发生爆燃。%To study the penetration‐induced initiation behavior of energetic fragment penetrating moving target ,the numerical simulation to penetrating moving target with different impact angles was conducted by AUTODYN‐3D software .The validity of the model was verified by a combination of experimental results and literature ones .The penetration‐induced initiation behavior of energetic fragment penetrating moving target was calculated .The results show that compared with a stationary target ,when energetic fragment penetrates moving target ,the fragment oc‐curs significant deviation ,and the perforation diameter gives large change .The residual velocity of fragment decrea‐ses with increasing the velocity of the target and the impact angle of the fragment ,and decline range is from 56 .25%to 77 .5% .The internal stress peaks of energetic materials change slightly ,almost as a straight line ,when fragment penetrating moving target compared with a stationary target ,the stress peak of energetic materials differs signifi‐cantly with different impact angles ,and the difference of the maximum peak can be up to 5 .2GPa .Under non zero impact angle ,the deflagration of energetic materials to be close to the target point does not easily take place .

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