Numerical Simulation Analysis of the Influence of Different Initiation Methods on the Effect of Shaped Charge Cutting
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摘要:为研究起爆方式对聚能切割器切割性能的影响，基于钛合金板聚能切割工况，采用AUTODYN显式动力学分析软件建立三维仿真模型，对比分析了不同点、线和面起爆条件下钛合金切割效果。结果表明：采用侧面与上表面同时起爆的面起爆方式切割性能最强；对比不同起爆方式的金属射流速度、切口处竖直方向应力分布和切口形态，可以发现两侧线起爆和侧面与上表面起爆模型切面齐整、切口较小，综合效果较好；聚能切割器两端切割效果相对较差，可采用外壳约束或者增加切割器与钛合金板相对长度加以改善。
Abstract:To study the influence of initiation mode on cutting performance of shaped charge cutter, based on the shaped charge cutting condition of titanium alloy plate, a three-dimensional simulation model was established by using AUTODYN explicit dynamic analysis software, and the cutting effect of titanium alloy under different point, line and surface initiation conditions was compared and analyzed. The results show that the cutting performance of side and upper surface initiation is the strongest. By comparing the metal jet velocity, vertical stress distribution at the notch and notch shape of different initiation modes, it can be found that the models of two-side line initiation and side and upper surface initiation have neat sections, smaller notches and better comprehensive effect. The cutting effect of both ends of the shaped charge cutter is relatively poor, which can be improved by using shell restraint or increasing the relative length between the cutter and titanium alloy plate.
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