针对现有研究没有考虑飞片厚度对冲击波压力峰值衰减特性影响的问题，采用数值仿真的方法，通过建立不同厚度的飞片撞击无氧铜靶板的仿真模型，比较飞片与靶板撞击面脉冲宽度的仿真值和理论计算值，验证了数值仿真模型和仿真结果的可信度。采用最小二乘法对仿真数据进行处理，建立了飞片厚度与冲击波压力峰值指数衰减模型衰减系数之间的定量数学关系式，结果表明飞片厚度对冲击波压力峰值衰减特性的影响比较明显，飞片厚度与衰减系数近似成线性关系，飞片厚度越小，衰减系数越大，冲击波压力峰值的衰减速率越快，为相关实验设计与分析提供了理论参考。
Abstract
Current studies don’t consider the influence of flyer’s thickness on the attenuation characteristics of shock wave’s peak pressure, for this problem, the simulation models that flyers of different thickness hit the oxygen free copper target board are established with the method of numerical simulation. Comparing the simulation values of pulse width in the interface of flyer and target plate with the theoretical values, the credibility of numerical models and simulation results can be verified. Processing the simulation data with least squares method, establishing the quantitative mathematical relationship between flyer’s thickness and the attenuation coefficient of the exponential decay models of shock wave’s peak pressure, it is shown that the influence of flyer’s thickness on the attenuation characteristics of shock wave’s peak pressure is obvious, and the relationship is approximately linear, the smaller the flyer’s thickness is, the larger the attenuation coefficient as well as the faster the attenuation rate of shock wave’s pressure peak will be, which provides a theoretical reference for the design and analysis of related experiments.
关键词
冲击波 /
压力峰值 /
数值仿真 /
飞片厚度 /
衰减特性
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Key words
shock wave /
peak pressure /
numerical simulation /
flyer’s thickness /
attenuation characteristics
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参考文献
[1]Fibbiani F P, Pulham C R. High-pressure studies of pharmaceutical compounds and energetic materials [J].Chem Soc Rev, 2006, 35(10): 932-942.
[2] Kim M, Yoo C S. Highly repulsive interaction in novel inclusion D2-N2 compound at high pressure: Raman and x-ray evidence[J]. J. Chem. Phys, 2011, 134(4) : 44-51.
[3] Pavlenko A V, Balabin S I, Kozelkov O E, et al. A one-stage light-gas gun for studying dynamic properties of structural materials in a range up to 40GPa[J]. Instruments and Experimental Techniques, 2013, 56(4) : 482-484.
[4] Erkman J O, Christensen A B. Attenuation of Shock Waves in Aluminum[J].Journal of Applied Physics, 1967, 38(13): 5395-5403.
[5] 汤文辉,张若棋,陈雪芳.LY12-M铝中冲击波衰减机理的实验研究[J].高压物理学报, 1988, 2(3): 218-226.
TANG Wen-hui, ZHANG Ruo-qi, CHENG Xue-fang. Experimental studies on the attenuation of shock waves in LY12-M aluminum[J]. Chinese Journal of High Pressure Physics, 1988, 2(3): 218-226.
[6] 程和法,黄笑梅,薛国宪,等.冲击波在泡沫铝中的传播和衰减特性[J].材料科学与工程学报,2004,22(1):78-81.
CHENG He-fa, HUANG Xiao-mei, XUE Guo-xian, et al. Propagation and attenuation characteristic of shock wave in aluminum foam[J]. Journal of Materials Science and Engineering, 2004,22(1): 78-81.
[7] 王永刚,王礼立.平板撞击下C30混凝土中冲击波的传播特性[J].爆炸与冲击,2010,30(2):119-124.
WANG Yong-gang, WANG Li-ping. Shock wave propagation characteristics in C30 concrete under plate impact loading[J]. Explosion and Shock Waves, 2010, 30(2) : 119-124.
[8] 李顺波,东兆星,齐燕军,等.爆炸冲击波在不同介质中传播衰减规律的数值模拟[J].振动与冲击,2009,28(7):115-117.
LI Shun-bo, DONG Zhao-xing, QI Yan-jun, et al. Numerical simulation for spread decay of blasting shock wave in different media[J]. Journal of Vibration and Shock, 2009, 28(7): 115-117.
[9] 唐廷,朱锡,侯海量,等.高速破片在防雷舱结构中引起的冲击荷载的理论研究[J].振动与冲击,2013,32(6):132-136.
TANG Ting, ZHU Xi, HOU Hai-liang, et al. Theory study of shock loading induced by high speed fragment in cabin near shipboard[J]. Journal of Vibration and Shock, 2013, 32(6): 132-136.
[10] Bazalitski G, Gurovich V T, Gefen A F, et al. Simulation of converging cylindrical GPa-range shock waves generated by wire array underwater electrical explosions[J]. Shock Waves, 2011, 21(4): 321-329.
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