Experimental Uncertainty Analysis of MagneticallyDriven Ramp Wave Compression
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摘要: 磁驱动斜波压缩作为一种新颖的加载技术受到冲击动力学界的关注。对磁驱动斜波压缩实验过程进行了分析, 给出了Lagrange正向数据处理的误差传递公式, 并对反向积分数据处理的实验不确定度进行了评估。正向分析和反向积分计算得到的实验不确定度一致。磁驱动斜波加载实验获得的材料声速的相对不确定度小于1.5%, 应力的相对不确定度小于2.5%, 表明磁驱动平面斜波压缩实验技术是一种可靠的精密物理实验技术。Abstract: As a novel technique, the magnetically driven ramp wave compression has attracted considerable attention of specialists in hydrodynamics.In this paper, we analyzed the loading process of magnetically driven ramp wave compression.Then we derived the experimental uncertainty transfer equations based on the forward Lagrangian analysis method, and estimated the uncertainties of the experimental results obtained by the backward integration method.There was good agreement between the two different methods.The results show that the relative uncertainties of the sound speed and the stress obtained in the magnetically driven ramp wave compression experiment are less than 1.5% and 2.5%, respectively.It shows that the magnetically driven ramp wave compression technique is a high-precision and reliable loading technique.
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Key words:
- ramp compression /
- data processing /
- uncertainty analysis
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图 3 不同厚度铝台阶靶的界面速度历史
Figure 3. Interface velocity histories of steppedsamples with different thicknesses
图 4 磁驱动斜波压缩实验测量的LY12铝的声速
Figure 4. Experimental sound speed of LY12 aluminumunder magnetically driven ramp wave compression
图 5 磁驱动斜波压缩实验测量的LY12铝的应力-应变曲线
Figure 5. Experimental stress-strain curve of LY12 aluminumunder magnetically driven ramp wave compression
图 6 磁驱动斜波压缩实验测量的LY12铝的应力-比容曲线
Figure 6. Experimental stress-specific volume curve of LY12aluminum under magnetically driven ramp wave compression
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