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含能材料  2009 

基于完全变光滑长度SPH方法的高能炸药爆轰过程数值试验

Keywords: 爆炸力学,光滑粒子流体动力学,变光滑长度,聚能装药

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Abstract:

传统的网格方法在模拟高能炸药(HE)爆炸问题时常会出现网格扭曲等问题,光滑粒子流体动力学(smoothedparticlehydrodynamics)方法是一种无网格纯Lagrangian粒子方法,非常适合求解这类问题。本文应用作者提出的完全变光滑长度SPH方法,修正了传统SPH法中由于变光滑长度效应所造成的计算误差,其在模拟密度等物理参量变化梯度剧烈的问题时比传统SPH法具有更高精度和稳定性;针对一维TNT板条爆轰过程和三维TNT聚能装药的爆轰过程两个算例进行了数值试验,并与已有的传统SPH法数值模拟结果及理论解进行了对比。结果表明,算例一说明该方法较传统SPH法在模拟此类问题时具有更高精度,比传统方法计算的CJ参数更接近理论值,验证了该方法在爆轰过程模拟的有效性;算例二说明该方法成功地进行了三维TNT聚能装药的爆轰过程数值试验,获得了爆轰产物气流的传播特性和喷射规律并符合爆炸理论。

References

[1]  Sigalotti L D,Klapp J,Sira E,SPH simulations of time-dependent Poiseuille flow at low Reynolds numbers,Journal of Computational Physics,2003.
[2]  Johnson G R,Beissel S R,Normalized smoothed functions for SPH impact computations,International Journal for Numerical Methods in Engineering,1996.
[3]  Monaghan J J,Smoothed particle hydrodynamics,Reports on Progress in Physics,2005.
[4]  Swegle J W,Attaway S W,On the feasibility of using smoothed particle hydrodynamics for underwater explosion calculations,Computational Mechanics,1995.
[5]  Liu M B,Liu G R,Lam K Y,Investigations into water mitigation using a meshless particle method,Shock Waves,2002.
[6]  Liu M B,Liu G R,Lam K Y,Smoothed particle hydrodynamics for numerical simulation of underwater explosion,Computational Mechanics,2003.
[7]  Liu M B,Liu G R,Zong Z,Computer simulation of high explosive explosion using smoothed particle hydrodynamics methodology,Computers and Fluids,2003.
[8]  Liu M B,Liu G R,Lam K Y,Meshfree particle simulation of the detonation process for high explosives in shaped charge unlined cavity configurations,Shock Waves,2003.
[9]  Kobashi W,Matsuo A,Explosion simulation including a coupled fluid-structure interaction problem using smoothed particle hydrodynamics,2006.
[10]  QIANG Hong-fu,GAO Wei-ran,A new SPH equation including variable smoothing lengths aspects and its implementation,北京,2007.
[11]  强洪夫.高巍然 修正变光滑长度SPH方法及其应用 [J].-解放军理工大学学报(自然科学版)2007(5)
[12]  强洪夫.高巍然 完全变光滑长度SPH法及其实现 [J].-计算物理2008(5)
[13]  Nelson R P,Papaloizou J C,Variable smoothing lengths and energy conservation in smoothed particle hydrodynamics,Monthly Notices of the Royal Astronomical Society,1994.
[14]  Monaghan J J,Smoothed particle hydrodynamics,Annual Review of Astronomy and Astrophysics,1992.
[15]  Lucy L B,A numerical approach to the testing of the fission hypothesis,Astronomical Journal,1977(12).
[16]  Lohner R,Yang C,Onate E,On the simulation of flows with violent free surface motion,2006.
[17]  Liu G R,Liu M B,韩旭,杨刚,强洪夫,光滑粒子流体动力学:一种无网格粒子法,长沙:湖南大学出版社,2005.

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