中文摘要：

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%@ 1001-246X

英文摘要：

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.