| 高速碰撞SPH方法模拟中的初始光滑长度和粒子间距 |
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| 引用本文： | 徐金中,汤文辉. 高速碰撞SPH方法模拟中的初始光滑长度和粒子间距[J]. 计算物理, 2009, 26(4): 548-552 |
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| 作者姓名： | 徐金中 汤文辉 |
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| 作者单位： | 国防科学技术大学理学院技术物理研究所, 湖南 长沙 410073 |
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| 摘 要： | 采用光滑粒子流体动力学方法对高速碰撞问题作数值模拟,分析初始光滑长度和非一致粒子间距对计算结果的影响,提出修正光滑长度法,并引入XSPH速度纠错公式.数值结果表明,初始光滑长度越大,弹丸的刚性越小,h0的合理取值范围应为d0<h0≤1.5d0;粒子间距越小,材料的刚性越小.非一致粒子间距和均匀粒子分布的计算结果吻合的较好.
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| 关 键 词： | 高速碰撞 光滑粒子流体动力学 粒子间距 数值模拟 |
| 收稿时间： | 2007-11-19 |
| 修稿时间： | 2008-09-11 |
Initial Smoothing Length and Space Between Particles in SPH Method for Numerical Simulation of High-speed Impacts |
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| XU Jinzhong,TANG Wenhui. Initial Smoothing Length and Space Between Particles in SPH Method for Numerical Simulation of High-speed Impacts[J]. Chinese Journal of Computational Physics, 2009, 26(4): 548-552 |
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| Authors: | XU Jinzhong TANG Wenhui |
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| Affiliation: | Institute of Technical Physics, College of Science, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | High-speed impact problems are simulated with smoothed particle hydrodynamics method.Initial smoothing length and nonconforming space between particles in simulation are analyzed.A modified smoothing length approach is put forward.With increase of initial smoothing length, projectile rigidity decreases gradually.A rational range of initial smoothing length is d0< h0≤ 1.5d0.With decrease of space between particles,rigidity of material decreases.With XSPH correction on velocity of a particle,results by nonconforming space between particles agree well with those from identical particle distribution. |
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| Keywords: | high-speed impacts smoothed particle hydrodynamics space between particles numerical simulation |
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