Numerical simulation of disturbance by sandwich explosive on jet
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摘要: 采用三维有限元程序(LS-DYNA)模拟了射流侵彻放有V型夹层炸药靶板的过程,并与无V型夹层炸药等情况进行了对比。V型夹层炸药爆炸后,运动的两组面板和背板对射流有严重的干扰和切割效应,导致射流偏转、弯曲、着靶点分散,使射流的侵彻深度下降约30%~90%,V型夹层炸药结构干扰程度随入射角度的增大而呈递增趋势。V型角的变化对射流的侵彻深度干扰作用不明显。Abstract: The processes for the jet penetrating at different impact angles into a semi-infinite target with V-shaped sandwich explosive structure are simulated numerically by using the 3D finite element code (LS-DYNA). Simulated results are compared with the corresponding cases without sandwich explosive structure. After ignition of the V-shaped sandwich explosive,the active face and back plates have great disturbance and cutting effect on the jet, which make the jet deviated, bended and the penetration capability decreases about 30%~90%. Disturbance of V-shaped sandwich explosive structure on jet increases with the increase of the impact angle. Variations of V-shaped angles cant disturb observably penetration of jet.
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Key words:
- mechanics of explosion /
- cutting effect /
- numerical simulation /
- V-shaped sandwich explosive /
- jet
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