Research on non-explosive underwater shock loading device
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摘要: 非药式水下爆炸冲击波加载装置作为实验室范围内一种新型水下爆炸冲击波加载技术，具有耗费低、危险性小、可重复性高等优点，对进一步研究水下冲击波毁伤效应具有重要意义。该装置通过一级轻气炮发射飞片正撞击水舱端部活塞在水舱中产生呈指数型衰减的水下冲击波。本文中采用实验与数值模拟相结合的方法对该装置产生的冲击波可靠性进行了研究，确定了一定工况内的初始冲击波强度及衰减时间常数，实验结果表明，该装置能够有效模拟水下爆炸冲击波载荷。Abstract: A non-explosive underwater shock loading device exhibits many advantages as a new labscale research method of underwater explosion, including high reliability, low cost.This method has an important role on further research on underwater explosion.To generate impulsive loading similar to blast, the exponentially decaying underwater pressure was produced by a flyer plate struck a piston at one end of the water tank.The shock wave strength and decay constant in a certain working condition were determined.The reliability of the non-explosive underwater explosion shock loading device was investigated by experiment and numerical simulation.The results indicate that the device can effectively simulate underwater explosive shock wave.
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图 1 水下爆炸冲击波加载装置
Figure 1. Experimental setup of non-explosive underwater shock simulation
图 5 数值模拟结果和实验结果对比
Figure 5. Comparison of the results between calculations and experiments
图 6 冲击波波阵面历程（mf=0.282 kg，vf=60.27 m/s）
Figure 6. The histories of shock wave(mf=0.282 kg, vf=60.27 m/s)
图 7 传感器C位置初始压力峰值随飞片速度变化关系
Figure 7. Relationship between shock wave strength and flyer velocities
表 1 数值模拟相关材料参数
Table 1. The material parameters of material model
材料 ρ0/(kg·m-3) σ0/MPa K/MPa n C c0/(m·s-1) s1 Г0 4340钢 7 830 792 510 0.26 0.014 S-7钢 7 750 1 539 477 0.18 0.012 水 998 1 490 1.92 0.1 
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