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.
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 do 〈 h0 ~〈 1 .Sd0. 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.
出处
《计算物理》
EI
CSCD
北大核心
2009年第4期548-552,共5页
Chinese Journal of Computational Physics
基金
国家自然科学基金(10672180
10802097)资助项目
关键词
高速碰撞
光滑粒子流体动力学
粒子间距
数值模拟
high-speed impacts
smoothed particle hydrodynamics
space between particles
numerical simulation
