排序方式: 共有48条查询结果,搜索用时 0 毫秒
41.
42.
43.
44.
采用光滑粒子流体动力学(SPH)方法模拟大变形问题具有明显的优点,但传统的SPH方法在模拟冲击波与接触界面的作用时,往往会出现压力的反常跳动。采用黎曼解描述粒子间相互作用的接触算法对传统SPH方法进行修正,计算了激波管和飞片碰撞(包含接触界面)问题中波的传播,并将计算结果与解析解作比较。结果表明,与传统的光滑粒子法相比,该改进的光滑粒子法无需引入人工粘性项和人工热流项,程序结构简洁,且能较好地处理接触界面问题,从而能有效提高计算精度。 相似文献
45.
46.
Sublimation energy is the latent heat of phase transition from sohd state directly to gas state, but it is difficult to measure experimentally. We propose a new method to determine the sublimation energy of materials by using the experimental data of blow-off impulse induced by electron beam and the computer program DRAM. With th& new method, the sublimation energy of polyester is finally determined to be about 1.1 k Jig. 相似文献
47.
48.